CN118050797A

CN118050797A - Method, device and terminal for separating pure transverse wave field of primary excitation of transverse wave controllable seismic source

Info

Publication number: CN118050797A
Application number: CN202211460057.0A
Authority: CN
Inventors: 岳媛媛; 邓志文; 张建磊; 聂红梅; 侯爱源; 宋常洲
Original assignee: Cnpc Oil Gas Exploration Software National Engineering Research Center Co ltd; China National Petroleum Corp; BGP Inc
Current assignee: Cnpc Oil Gas Exploration Software National Engineering Research Center Co ltd; China National Petroleum Corp; BGP Inc
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2024-05-17

Abstract

The embodiment of the application discloses a method, a device and a terminal for separating a pure transverse wave field of a transverse wave controllable source excited at one time, and belongs to the field of oil-gas seismic exploration and seismic data processing. The method comprises the following steps: collecting first seismic shear wave data and second seismic shear wave data; performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on a target direction and a seismic line direction related to the property of the stratum medium to be detected under the ground to obtain third seismic transverse wave data and fourth seismic transverse wave data; and respectively adjusting the polarity of the third seismic transverse wave data and the polarity of the fourth seismic transverse wave data to be consistent, so as to obtain a first wave field and a second wave field, wherein the first wave field and the second wave field are the processing results after the separation of the pure transverse wave fields of the target seismic transverse wave. The method can adapt to the change of the direction of the excitation of the target seismic transverse wave, and can process the acquired seismic transverse wave data of the target seismic transverse wave excited in any direction in a horizontal two-component rotation and polarity adjustment mode.

Description

Method, device and terminal for separating pure transverse wave field of primary excitation of transverse wave controllable seismic source

Technical Field

The embodiment of the application relates to the field of oil-gas seismic exploration and seismic data processing, in particular to a method, a device and a terminal for separating a pure transverse wave field of a transverse wave controllable source excited at one time.

Background

Seismic exploration is an exploration method that records seismic wave data that propagates in a formation by artificially exciting seismic waves, and surveys the nature and geologic structure of subsurface rock by processing the seismic wave data. Seismic waves are elastic waves that radiate from a source. Seismic waves can be separated into transverse waves and longitudinal waves according to the propagation mode. The controllable seismic sources can be divided into transverse wave controllable seismic sources and longitudinal wave controllable seismic sources, wherein the excitation direction of the transverse wave controllable seismic sources is a horizontal direction, and excitation energy mainly propagates to the underground in a transverse wave mode; the excitation direction of the longitudinal wave controllable seismic source is the vertical direction, and the excitation energy mainly propagates to the underground in the form of longitudinal waves.

In the related art, in order to reduce the cost of seismic exploration, in the process of manually exciting seismic waves, two-time transverse waves and one-time longitudinal waves can be excited at each shot point to be reduced to one-time transverse waves and one-time longitudinal waves, and even the longitudinal waves can not be excited, but only one-time transverse waves can be excited.

However, by adopting the transverse wave seismic exploration mode, the related technology can only process the seismic transverse wave data in which the direction of the seismic transverse wave excitation is parallel to the direction of the seismic survey line or the direction of the seismic transverse wave excitation is perpendicular to the direction of the seismic survey line, and the processing of the seismic transverse wave data is difficult under the condition that the direction of the seismic transverse wave excitation is not fixed.

Disclosure of Invention

The embodiment of the application provides a method, a device and a terminal for separating a pure transverse wave field of a transverse wave controllable source in one-time excitation, which can process target seismic transverse waves excited in any horizontal direction in a mode of horizontal component rotation and polarity adjustment to obtain seismic transverse wave data after separating the pure transverse wave field, and the technical scheme is as follows:

in one aspect, a method for separating a pure shear wave field of a shear wave controllable source excited at one time is provided, the method comprising:

Acquiring first and second seismic transverse wave data, wherein the first seismic transverse wave data is acquired in a direction parallel to a seismic line direction after a target seismic transverse wave is excited by a transverse wave controllable seismic source, and the second seismic transverse wave data is acquired in a direction perpendicular to the seismic line direction after the target seismic transverse wave is excited by the transverse wave controllable seismic source;

Performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on a target direction and the seismic line direction which are related to the property of the stratum medium to be detected under the ground to obtain third seismic transverse wave data and fourth seismic transverse wave data, wherein the third seismic transverse wave data corresponds to a first direction, the fourth seismic transverse wave data corresponds to a second direction, the first direction is parallel to the target direction, and the second direction is perpendicular to the target direction;

and respectively adjusting the third seismic transverse wave data polarity and the fourth seismic transverse wave data polarity to be consistent, so as to obtain a first wave field and a second wave field, wherein the first wave field and the second wave field are processing results after the separation of the pure transverse wave field of the target seismic transverse wave.

In another aspect, a device for separating a pure shear wave field of a shear wave controllable source in one excitation is provided, the device comprising:

The system comprises an acquisition module, a storage module and a storage module, wherein the acquisition module is used for acquiring first seismic transverse wave data and second seismic transverse wave data, the first seismic transverse wave data is acquired in a direction parallel to the direction of a seismic line after a target seismic transverse wave is excited by a transverse wave controllable seismic source, and the second seismic transverse wave data is acquired in a direction perpendicular to the direction of the seismic line after the target seismic transverse wave is excited by the transverse wave controllable seismic source;

The horizontal two-component rotation module is used for carrying out horizontal two-component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on a target direction and the seismic line direction which are related to the property of the stratum medium to be detected under the ground to obtain third seismic transverse wave data and fourth seismic transverse wave data, the third seismic transverse wave data corresponds to a first direction, the fourth seismic transverse wave data corresponds to a second direction, the first direction is parallel to the target direction, and the second direction is perpendicular to the target direction;

The polarity adjustment module is used for respectively adjusting the third seismic transverse wave data polarity and the fourth seismic transverse wave data polarity to be consistent to obtain a first wave field and a second wave field, wherein the first wave field and the second wave field are processing results after the separation of the pure transverse wave field of the target seismic transverse wave.

In some embodiments, the target direction is a direction of a line between a shot and a detector point, where the target seismic transverse wave propagates in an azimuthally isotropic medium; the shot point is the position of the target seismic transverse wave excitation, and the detection point is the position of collecting the first seismic transverse wave data and the second seismic transverse wave data;

The horizontal two-component rotation module is used for determining the target direction based on the coordinates of the shot point and the coordinates of the detection point; and performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain the third seismic transverse wave data and the fourth seismic transverse wave data.

In some embodiments, the target direction is the direction of a subsurface fracture with the target seismic shear wave propagating in an azimuthally anisotropic medium;

The horizontal two-component rotation module is used for acquiring the direction of the underground crack based on the azimuth anisotropic medium; and carrying out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the direction of the underground crack and the direction of the seismic line to obtain the third seismic transverse wave data and the fourth seismic transverse wave data.

In some embodiments, the target direction is a perpendicular to a direction of projection of an axis of symmetry of the azimuthal anisotropic medium in a horizontal plane, where the target seismic shear wave propagates in the azimuthal anisotropic medium;

The horizontal two-component rotation module is used for acquiring the target direction based on the azimuth anisotropic medium; and performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain the third seismic transverse wave data and the fourth seismic transverse wave data.

In some embodiments, the polarity adjustment module is configured to adjust the third seismic shear wave data and the fourth seismic shear wave data with negative polarity to positive polarity seismic shear wave data based on a first angle and a second angle, where the first angle is an angle between a direction in which the target seismic shear wave is excited and the direction of the seismic line, and the second angle is an angle between the target direction and the direction of the seismic line; and separating a wave field generated by the propagation of the target seismic transverse wave in the stratum medium to be detected under the ground based on the adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data to obtain the first wave field and the second wave field.

In some embodiments, where the target seismic transverse wave propagates in an azimuthally isotropic medium, the first wavefield is a vertically polarized transverse wave wavefield and the second wavefield is a horizontally polarized transverse wave wavefield.

In some embodiments, the first wavefield is a fast shear wave wavefield and the second wavefield is a slow shear wave wavefield, with the target seismic shear wave propagating in an azimuthal anisotropic medium.

In another aspect, a terminal is provided, the terminal comprising a processor and a memory, the memory storing at least one computer program, the at least one computer program being loaded and executed by the processor to implement a method of single shot pure shear wave wavefield separation of a shear wave vibroseis as described in the previous aspect.

In another aspect, there is provided a computer readable storage medium having stored therein at least one computer program loaded and executed by a processor to implement a method of single shot pure shear wave wavefield separation of a shear wave vibroseis as described in the previous aspect.

In another aspect, a computer program product is provided, comprising a computer program loaded and executed by a processor to implement a method of single shot pure shear wave wavefield separation of a shear wave controlled source as described in the previous aspect.

The embodiment of the application provides a pure transverse wave field separation scheme for once exciting a transverse wave controllable source, which is used for acquiring first and second seismic transverse wave data by respectively acquiring seismic transverse wave data generated by exciting a target seismic transverse wave through the transverse wave controllable source in a direction parallel to the direction of a seismic survey line and a direction perpendicular to the direction of the seismic survey line, so that the acquisition of the seismic transverse wave data parallel to the direction of the seismic survey line and the direction perpendicular to the direction of the seismic survey line can be ensured. The method comprises the steps of carrying out horizontal component rotation on the collected seismic transverse wave data based on the target direction and the seismic line direction related to the property of the stratum medium to be detected under the ground, adapting to the change of the direction of target seismic transverse wave excitation, converting the collected seismic transverse wave data in any direction in a horizontal component rotation mode for target seismic transverse wave excitation, and obtaining third seismic transverse wave data parallel to the target direction after conversion and fourth seismic transverse wave data perpendicular to the target direction after conversion. The polarity of the third seismic transverse wave data is adjusted to be consistent with that of the fourth seismic transverse wave data, so that the seismic transverse wave data with the consistent polarity can be obtained, and the first wave field and the second wave field generated after the target seismic transverse wave is excited can be obtained through the seismic transverse wave data with the consistent polarity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of an implementation environment provided by an embodiment of the present application;

FIG. 2 is a flow chart of a method for separating a pure transverse wave field of a primary excitation of a transverse wave controllable source, which is provided by an embodiment of the application;

FIG. 3 is a flow chart of another method for separating a pure transverse wave field of a primary excitation of a transverse wave controlled source provided by an embodiment of the application;

FIG. 4 is a schematic diagram of seismic shear wave data provided by an embodiment of the present application;

FIG. 5 is a schematic illustration of another seismic shear wave data provided by an embodiment of the application;

FIG. 6 is a schematic diagram of another seismic shear wave data provided by an embodiment of the application;

FIG. 7 is a schematic illustration of another seismic shear wave data provided by an embodiment of the application;

FIG. 8 is a schematic diagram of another seismic shear wave data provided by an embodiment of the application;

FIG. 9 is a schematic diagram of another seismic shear wave data provided by an embodiment of the application;

FIG. 10 is a schematic structural diagram of a device for separating a pure transverse wave field of a primary excitation of a transverse wave controlled source according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings.

It is to be understood that the terms "first," "second," and the like, as used herein, may be used to describe various concepts, but are not limited by these terms unless otherwise specified. These terms are only used to distinguish one concept from another. For example, the first seismic shear wave data may be referred to as second seismic shear wave data, and similarly, the second seismic shear wave data may be referred to as first seismic shear wave data, without departing from the scope of the application.

Wherein, at least one refers to one or more than one, for example, at least one wave detector can be any integer wave detector greater than or equal to one of one wave detector, two wave detectors, three wave detectors and the like. The plurality of detectors means two or more, and for example, the plurality of detectors may be an integer number of two or more, such as two detectors and three detectors. Each refers to each of the at least one, e.g., each of the plurality of the pickups, and if the plurality of pickups is three pickups, each of the plurality of pickups refers to each of the three pickups.

It should be noted that, the information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, presented data, etc.), and signals related to the present application are all authorized by the user or are fully authorized by the parties, and the collection, use, and processing of the related data is required to comply with the relevant laws and regulations and standards of the relevant countries and regions. For example, the first and second seismic shear wave data referred to in the present application are acquired with sufficient authorization.

The following describes an implementation environment of an embodiment of the present application.

FIG. 1 is a schematic diagram of an implementation environment provided by an embodiment of the present application, referring to FIG. 1, the implementation environment includes: a shear wave controllable source 101, a detector 102 and a terminal 103.

The shear wave controllable source 101 is used to excite controllable target seismic shear waves at the shot point in any direction down the ground. The geophone 102 is used to collect first and second seismic shear wave data reflected from a subsurface formation medium to be detected at the geophone.

The shear-wave controlled source 101 may refer generally to one of a plurality of shear-wave controlled sources, the present embodiment being illustrated with the shear-wave controlled source 101. Those skilled in the art will appreciate that the number of shear-wave controllable sources may be greater or lesser. For example, the number of the transverse wave controllable seismic sources may be several, or the number of the transverse wave controllable seismic sources may be tens or hundreds, or more, and the number and the equipment type of the transverse wave controllable seismic sources are not limited in the embodiment of the application.

The detector 102 may be referred to generally as one of a plurality of detectors, the present embodiment being illustrated with the detector 102. Those skilled in the art will appreciate that the number of detectors may be greater or lesser. For example, the number of the detectors may be several, or the number of the detectors may be tens or hundreds, or more, and the number of the detectors and the type of the device are not limited in the embodiment of the present application.

The terminal 103 may be at least one of a smart phone, a desktop computer, a portable computer, a laptop computer, and the like. The terminal 103 may be provided with an application program for performing horizontal component rotation, polarity adjustment, and other processing on the first seismic transverse wave data and the second seismic transverse wave data, so as to obtain a first wave field and a second wave field. The user may log into the application through terminal 103 to obtain the first wave field and the second wave field. The application is associated with the geophone 102 and the first and second seismic shear wave data are provided by the geophone 102 to the terminal 103. The terminal 103 may be connected to the detector 102 via a wireless network or a wired network.

The terminal 103 may refer broadly to one of a plurality of terminals, the present embodiment being illustrated by the terminal 103. Those skilled in the art will recognize that the number of terminals may be greater or lesser. For example, the number of the terminals may be several, or the number of the terminals may be tens or hundreds, or more, and the number and the device type of the terminal are not limited in the embodiment of the present application.

Fig. 2 is a flowchart of a method for separating a pure transverse wave field of a transverse wave controlled source excited at one time according to an embodiment of the present application, and the embodiment of the present application is executed by a terminal, referring to fig. 2, and the method includes:

201. The terminal acquires first seismic transverse wave data and second seismic transverse wave data, wherein the first seismic transverse wave data are seismic transverse wave data acquired in a direction parallel to the direction of a seismic survey line after a target seismic transverse wave is excited by a transverse wave controllable seismic source, and the second seismic transverse wave data are seismic transverse wave data acquired in a direction perpendicular to the direction of the seismic survey line after the target seismic transverse wave is excited by the transverse wave controllable seismic source.

In the embodiment of the application, the target earthquake transverse wave can be excited to any direction under the ground through the transverse wave controllable seismic source. After a transverse wave controllable seismic source excites a target seismic transverse wave, the target seismic transverse wave propagates in a stratum medium to be detected under the ground. The terminal can respectively collect first seismic transverse wave data and second seismic transverse wave data reflected by stratum media to be detected under the ground in a direction parallel to the direction of the seismic line and a direction perpendicular to the direction of the seismic line through the detector. Optionally, the terminal may also acquire the first seismic shear wave data and the second seismic shear wave data from the server. And the server transmits the first seismic transverse wave data and the second seismic transverse wave data uploaded to the server by other terminals to the terminal based on the seismic transverse wave data acquisition request transmitted by the terminal. Correspondingly, the other terminals are used for collecting the first seismic transverse wave data and the second seismic transverse wave data and uploading the collected first seismic transverse wave data and second seismic transverse wave data to the server. In the field of seismic exploration, a seismic line is a straight line formed by a plurality of seismic measuring points, the direction of the seismic line is the direction of the straight line, and the direction of the seismic line is generally related to the structure and the trend of stratum media. The terminal can collect the first seismic transverse wave data and the second seismic transverse wave data at the positions of the seismic measuring points through the detectors.

202. The terminal carries out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on a target direction and a seismic line direction which are related to the property of the stratum medium to be detected, so as to obtain third seismic transverse wave data and fourth seismic transverse wave data, wherein the third seismic transverse wave data corresponds to the first direction, the fourth seismic transverse wave data corresponds to the second direction, the first direction is parallel to the target direction, and the second direction is perpendicular to the target direction.

In the embodiment of the application, the property of the stratum medium to be detected can represent the physical, chemical and other properties of the stratum medium to be detected. The nature of the formation medium is different, and the seismic shear wave data reflected by the formation medium is also different. The terminal is capable of determining a target direction based on a property of the formation medium. Because the target direction and the direction of the seismic line have an included angle, the terminal can perform horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the direction of the seismic line, so as to obtain third seismic transverse wave data and fourth seismic transverse wave data. By means of horizontal two-component rotation, for target seismic transverse waves excited in any direction, third seismic transverse wave data in a direction parallel to the target direction and fourth seismic transverse wave data in a direction perpendicular to the target direction can be obtained based on first seismic transverse wave data in a direction parallel to the seismic line direction and second seismic transverse wave data in a direction perpendicular to the seismic line direction based on an included angle between the target direction and the seismic line direction.

203. And the terminal adjusts the third seismic transverse wave data polarity and the fourth seismic transverse wave data polarity to be consistent respectively to obtain a first wave field and a second wave field, wherein the first wave field and the second wave field are processing results after the separation of the pure transverse wave fields of the target seismic transverse wave.

In the embodiment of the application, the terminal respectively adjusts the seismic transverse wave data with the negative polarity in the third seismic transverse wave data and the fourth seismic transverse wave data to the positive polarity, so that the third seismic transverse wave data with the same positive polarity and the fourth seismic transverse wave data with the same positive polarity can be obtained. And the terminal separates wave fields generated by the propagation of the target seismic transverse wave in stratum media to be detected under the ground through the third seismic transverse wave data and the fourth seismic transverse wave data which are both positive in polarity, so as to obtain a first wave field and a second wave field.

The embodiment of the application provides a method for separating a pure transverse wave field of a transverse wave controllable source excited at one time, which is used for acquiring seismic transverse wave data generated by exciting a target seismic transverse wave through the transverse wave controllable source in a direction parallel to the direction of a seismic survey line and a direction perpendicular to the direction of the seismic survey line respectively to obtain first seismic transverse wave data and second seismic transverse wave data, so that the acquisition of the seismic transverse wave data parallel to the direction of the seismic survey line and the direction perpendicular to the direction of the seismic survey line can be ensured. The method comprises the steps of carrying out horizontal component rotation on the collected seismic transverse wave data based on the target direction and the seismic line direction related to the property of the stratum medium to be detected under the ground, adapting to the change of the direction of target seismic transverse wave excitation, converting the collected seismic transverse wave data in a horizontal component rotation mode for any target seismic transverse wave excitation in the horizontal direction, and obtaining third seismic transverse wave data parallel to the target direction after conversion and fourth seismic transverse wave data perpendicular to the target direction after conversion. The polarity of the third seismic transverse wave data is adjusted to be consistent with the polarity of the fourth seismic transverse wave data, so that the seismic transverse wave data with the consistent polarity can be obtained, and the first wave field and the second wave field generated after the target seismic transverse wave is excited can be obtained through the seismic transverse wave data with the consistent polarity.

The above-mentioned fig. 2 schematically illustrates a main flow of the method for separating a pure transverse wave field of a primary excitation of a transverse wave controlled source according to the embodiment of the present application, and the method for separating a pure transverse wave field of a primary excitation of a transverse wave controlled source is described in detail below. FIG. 3 is a flow chart of another method for separating a pure transverse wave field of a primary excitation of a transverse wave controlled source, which is executed by a terminal, and is shown in FIG. 3, and the method comprises:

301. The terminal acquires first seismic transverse wave data and second seismic transverse wave data, wherein the first seismic transverse wave data are seismic transverse wave data acquired in a direction parallel to the direction of a seismic survey line after a target seismic transverse wave is excited by a transverse wave controllable seismic source, and the second seismic transverse wave data are seismic transverse wave data acquired in a direction perpendicular to the direction of the seismic survey line after the target seismic transverse wave is excited by the transverse wave controllable seismic source.

Step 301 is similar to step 201 described above, and will not be described again.

In some embodiments, the terminal acquires the first and second seismic shear wave data via a detector. The detector may be a three-component detector. The three-component detector is a special detector used in seismic exploration. Three mutually perpendicular sensors are arranged in the three-component detector, and transverse wave data can be acquired on three components through the sensors. The horizontal component of the three-component detector comprises an X component and a Y component, the direction corresponding to the X component is parallel to the direction of the seismic line, and the direction corresponding to the Y component is perpendicular to the direction of the seismic line. Accordingly, the three-component detector collects first seismic shear wave data on the X component and second seismic shear wave data on the Y component.

302. The terminal determines a target direction related to a property of the formation medium to be detected.

In the embodiment of the application, the stratum medium can be divided into an azimuth isotropy medium and an azimuth anisotropy medium according to the property difference of the stratum medium to be detected. In the case where a subsurface vertical fracture exists in the formation medium, the formation medium may be considered to be an azimuthal anisotropic medium. The terminal determines whether the formation medium is an azimuthally isotropic medium or an azimuthally anisotropic medium based on a property of the formation medium to be detected, and determines a target direction associated with the property of the formation medium.

In some embodiments, the target direction is a direction of a line between the shot and the geophone in the case where the target seismic shear wave propagates in an azimuthally isotropic medium. The shot point is the position of target seismic transverse wave excitation, and the wave detection point is the position for collecting the first seismic transverse wave data and the second seismic transverse wave data. The terminal determines the direction of the connecting line between the shot point and the wave detection point based on the coordinates of the shot point and the coordinates of the wave detection point, and takes the direction of the connecting line between the shot point and the wave detection point as the target direction.

In some embodiments, the target direction is the direction of the subsurface fracture in the event that the target seismic shear wave propagates in an azimuthally anisotropic medium. Under the condition that the direction of the underground crack is unknown, the terminal can perform converted transverse wave splitting analysis according to PS converted wave seismic data which are excited by the longitudinal wave controllable seismic source and received by two horizontal components of the three-component detector, so as to obtain the direction of the underground crack, and the direction of the underground crack is taken as a target direction. The PS converted wave is emitted from the seismic source, propagates to the middle part in the form of longitudinal waves, and propagates to the wave detection point in the form of transverse waves after being reflected.

In some embodiments, where the target seismic shear wave propagates in the azimuthal anisotropic medium, the target direction is perpendicular to the direction of projection of the axis of symmetry of the azimuthal anisotropic medium on a horizontal plane. The terminal determines a symmetry axis of the azimuth anisotropic medium based on the azimuth anisotropic medium, and takes a vertical direction of a direction of projection of the symmetry axis on a horizontal plane as a target direction.

303. The terminal carries out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain third seismic transverse wave data and fourth seismic transverse wave data, the third seismic transverse wave data corresponds to the first direction, the fourth seismic transverse wave data corresponds to the second direction, the first direction is parallel to the target direction, and the second direction is perpendicular to the target direction.

In the embodiment of the application, the terminal can perform horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain third seismic transverse wave data and fourth seismic transverse wave data. According to the condition that the target seismic transverse wave propagates in different stratum media, the terminal can horizontally rotate the first seismic transverse wave data and the second seismic transverse wave data in two ways.

In the first mode, when the target seismic transverse wave propagates in the azimuth isotropic medium, the target direction is the direction of a connecting line between the shot point and the wave detection point. The terminal determines an angle between a connecting line direction between the shot point and the detector point and a seismic line direction, and marks the angle as beta, and the first seismic transverse wave data and the second seismic transverse wave data are represented by vectors [ Vx Vy ]. Wherein Vx is first seismic shear wave data and Vy is second seismic shear wave data. The terminal carries out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data through the following formula (1) to obtain third seismic transverse wave data and fourth seismic transverse wave data.

Wherein U1 is third seismic shear wave data. U2 is fourth seismic shear wave data. Vx is the first seismic shear wave data. Vy is the second seismic shear wave data. Beta is the angle between the direction of the line between the shot and the detector and the direction of the seismic line.

By means of horizontal two-component rotation, for a target seismic transverse wave excited in any direction, under the condition that the target seismic transverse wave propagates in an azimuth isotropy medium, first seismic transverse wave data in the direction parallel to the direction of a seismic line and second seismic transverse wave data in the direction perpendicular to the direction of the seismic line can be converted based on an included angle between the direction of a connecting line between a shot point and a detection point and fourth seismic transverse wave data in the direction perpendicular to the direction of the connecting line between the shot point and the detection point are obtained.

FIG. 4 is a schematic diagram of seismic shear wave data with a target seismic shear wave propagating in an azimuthally isotropic medium. As shown in fig. 4, the left side is the first seismic shear wave data Vx, the right side is the second seismic shear wave data Vy, the abscissa is the azimuth of the detector point, and the ordinate is the time series. When the geophone collects the seismic data, the seismic data reflected by the stratum medium in the shallow layer below the ground is collected first, and then the seismic data reflected by the stratum medium in the deep layer below the ground is collected, so that the ordinate of fig. 4 can represent the time sequence relation of the seismic data collection.

FIG. 5 is a schematic diagram of another seismic shear wave data in the case where a target seismic shear wave propagates in an azimuthally isotropic medium. As shown in fig. 5, the third seismic shear wave data U1 is on the left side, and the fourth seismic shear wave data U2 is on the right side.

In the second mode, when the target seismic transverse wave propagates in the azimuth anisotropic medium, the target direction is the direction of the underground crack. The terminal determines an angle between the direction of the underground fracture and the direction of the seismic line, marks the angle as gamma, and represents the first seismic transverse wave data and the second seismic transverse wave data through a vector [ Vx Vy ]. Wherein Vx is first seismic shear wave data and Vy is second seismic shear wave data. And (3) the terminal carries out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data through the following formula (2) to obtain third seismic transverse wave data and fourth seismic transverse wave data.

Wherein U1 is the third seismic shear wave data, and U2 is the fourth seismic shear wave data. Vx is the first seismic shear wave data. Vy is the second seismic shear wave data. Gamma is the angle between the direction of the subsurface fracture and the direction of the seismic line.

By means of horizontal two-component rotation, for a target seismic transverse wave excited in any direction, under the condition that the target seismic transverse wave propagates in an azimuth anisotropic medium, first seismic transverse wave data in the direction parallel to the direction of a seismic line and second seismic transverse wave data in the direction perpendicular to the direction of the seismic line can be converted based on an included angle between the direction of an underground crack and the direction of the seismic line, and third seismic transverse wave data in the direction parallel to the direction of the underground crack and fourth seismic transverse wave data in the direction perpendicular to the direction of the underground crack are obtained.

In the case where the target seismic transverse wave propagates in the azimuth anisotropic medium, fig. 6 is a schematic diagram of another seismic transverse wave data, and as shown in fig. 6, the left side is the first seismic transverse wave data Vx, and the right side is the second seismic transverse wave data Vy.

In the case where the target seismic transverse wave propagates in the azimuth anisotropic medium, fig. 7 is a schematic diagram of another seismic transverse wave data, and as shown in fig. 7, the third seismic transverse wave data U1 is on the left side, and the fourth seismic transverse wave data U2 is on the right side.

In the third aspect, when the target seismic transverse wave propagates in the azimuth anisotropic medium, the target direction is a vertical direction of a direction of projection of the symmetry axis of the azimuth anisotropic medium on a horizontal plane. The terminal determines an angle between a vertical direction of a projection direction of a symmetry axis of the azimuth anisotropic medium on a horizontal plane and a direction of a seismic line, and marks the angle as theta, and the first seismic transverse wave data and the second seismic transverse wave data are represented by vectors [ Vx Vy ]. Wherein Vx is first seismic shear wave data and Vy is second seismic shear wave data. And (3) the terminal carries out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data through the following formula to obtain third seismic transverse wave data and fourth seismic transverse wave data.

Wherein U1 is the third seismic shear wave data, and U2 is the fourth seismic shear wave data. Vx is the first seismic shear wave data. Vy is the second seismic shear wave data. θ is the angle between the vertical of the direction of the projection of the symmetry axis of the azimuthal anisotropic medium on the horizontal plane and the direction of the seismic line.

By means of horizontal two-component rotation, for a target seismic transverse wave excited in any direction, when the target seismic transverse wave propagates in the azimuth anisotropic medium, first seismic transverse wave data in a direction parallel to the direction of the seismic line and second seismic transverse wave data in a direction perpendicular to the direction of the seismic line can be converted based on an included angle between the vertical direction of the direction of projection of the symmetry axis of the azimuth anisotropic medium in the horizontal plane and the direction of the seismic line, so as to obtain third seismic transverse wave data in a direction parallel to the vertical direction of the direction of projection of the symmetry axis of the azimuth anisotropic medium in the horizontal plane and fourth seismic transverse wave data in a direction perpendicular to the vertical direction of the direction of projection of the symmetry axis of the azimuth anisotropic medium in the horizontal plane.

304. The terminal adjusts the negative polarity seismic transverse wave data in the third seismic transverse wave data and the fourth seismic transverse wave data into positive polarity seismic transverse wave data based on a first angle and a second angle respectively, and obtains the adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data, wherein the first angle is an angle between the excitation direction of the target seismic transverse wave and the direction of the seismic line, and the second angle is an angle between the target direction and the direction of the seismic line.

In the embodiment of the application, a terminal acquires the excitation direction of the target seismic transverse wave, and takes the angle between the excitation direction and the direction of the survey line as a first angle. And the terminal respectively carries out reverse polarity on the seismic transverse wave data with negative polarity in the third seismic transverse wave data and the fourth seismic transverse wave data based on the first angle and the second angle to obtain the seismic transverse wave data with positive polarity. The adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data are the seismic transverse wave data with positive polarity, so that the mutual cancellation of the seismic transverse wave data with opposite polarities can be avoided when the seismic transverse wave data are subjected to superposition processing. Wherein the direction of excitation of the target transverse seismic wave can be determined by the angle between the actual excitation direction of the target transverse seismic wave and the direction of the seismic lineThe first angle is/>When a transverse wave controllable source excites a target earthquake transverse wave once along any horizontal direction at a shot point position on the ground, a method for exciting the target earthquake transverse wave is providedCan be arbitrarily changed from 0 to 360 degrees. The ground can be provided with a plurality of shots, and the excitation directions of the transverse wave controllable seismic sources positioned at different shot positions can be different.

It should be noted that, when the target seismic transverse wave propagates in different stratum mediums, the target direction is different, and the second angle is different. Therefore, the terminal can perform polarity adjustment on the third seismic transverse wave data and the fourth seismic transverse wave data in the following three ways.

In the first mode, when the target seismic transverse wave propagates in the azimuth isotropic medium, the target direction is the direction of a connecting line between the shot point and the wave detection point. And the terminal adjusts the polarities of the third seismic transverse wave data and the fourth seismic transverse wave data through the following formula (4).

Wherein U1 is third seismic shear wave data. U2 is fourth seismic shear wave data.Is the first angle, i.e., the angle between the direction of excitation of the target seismic transverse wave and the direction of the seismic line. Beta is the second angle, i.e., the angle between the direction of the line between the shot and the detector and the direction of the seismic line. Usv is the third seismic shear wave data, which are all positive in polarity after adjustment. Ush is fourth seismic shear wave data that are all positive in polarity after adjustment.

When (when)And when the third seismic transverse wave data are positive in polarity, the polarity of the third seismic transverse wave data is unchanged. When/>When the third seismic transverse wave data is negative, the terminal performs reverse polarity on the third seismic transverse wave data to obtain adjusted third seismic transverse wave data with positive polarity, and Usv can represent SV wave (vertically polarized transverse wave) data. When/>When the fourth seismic transverse wave data is positive, the polarity of the fourth seismic transverse wave data is unchanged, whenWhen the fourth seismic transverse wave data is negative, the terminal performs reverse polarity on the fourth seismic transverse wave data to obtain fourth seismic transverse wave data with positive polarity after adjustment, and Ush can represent SH wave (horizontally polarized transverse wave data) data.

In the case where the target seismic transverse wave propagates in an azimuthally isotropic medium, fig. 8 is a schematic diagram of another seismic transverse wave data, as shown in fig. 8, SV wave data on the left side and SH wave data on the right side.

In the second mode, when the target seismic transverse wave propagates in the azimuth anisotropic medium, the target direction is the direction of the underground crack. And the terminal adjusts the polarities of the third seismic transverse wave data and the fourth seismic transverse wave data through the following formula (5).

Wherein U1 is third seismic shear wave data. U2 is fourth seismic shear wave data.Is the first angle, i.e., the angle between the direction of excitation of the target seismic transverse wave and the direction of the seismic line. Gamma is the second angle, the angle between the direction of the subsurface fracture and the direction of the seismic line. Us 1 is the third seismic shear wave data that are all positive in polarity after adjustment. Us 2 is fourth seismic transverse wave data which are all positive in polarity after adjustment.

When (when)And when the third seismic transverse wave data are positive in polarity, the polarity of the third seismic transverse wave data is unchanged. When/>When the third seismic transverse wave data is of negative polarity, the terminal performs reverse polarity on the third seismic transverse wave data to obtain third seismic transverse wave data of positive polarity after adjustment, and us 1 can represent fast transverse wave data, namely SS1 wave data. When/>And when the fourth seismic transverse wave data is positive in polarity, the polarity of the fourth seismic transverse wave data is unchanged. When (when)When the fourth seismic transverse wave data is of negative polarity, the terminal performs reverse polarity on the fourth seismic transverse wave data to obtain fourth seismic transverse wave data of positive polarity after adjustment, and us 2 can represent slow transverse wave data, namely SS2 wave data.

In the case where the target seismic transverse wave propagates in the azimuth anisotropic medium, fig. 9 is a schematic diagram of another seismic transverse wave data, and as shown in fig. 9, SS1 wave data is on the left side, and SS2 wave data is on the right side.

In the third aspect, when the target seismic transverse wave propagates in the azimuth anisotropic medium, the target direction is a vertical direction of a direction of projection of the symmetry axis of the azimuth anisotropic medium on a horizontal plane. And the terminal adjusts the polarities of the third seismic transverse wave data and the fourth seismic transverse wave data through the following formula (6).

Wherein U1 is third seismic shear wave data. U2 is fourth seismic shear wave data.Is the first angle, i.e., the angle between the direction of excitation of the target seismic transverse wave and the direction of the seismic line. θ is the second angle, i.e., the angle between the vertical of the direction of the projection of the axis of symmetry of the azimuthal anisotropic medium on the horizontal plane and the direction of the seismic line. Us 1 is the third seismic shear wave data that are all positive in polarity after adjustment. Us 2 is fourth seismic transverse wave data which are all positive in polarity after adjustment.

When (when)And when the third seismic transverse wave data are positive in polarity, the polarity of the third seismic transverse wave data is unchanged. When/>When the third seismic transverse wave data is of negative polarity, the terminal performs reverse polarity on the third seismic transverse wave data to obtain third seismic transverse wave data of positive polarity after adjustment, and us 1 can represent fast transverse wave data, namely SS1 wave data. When/>And when the fourth seismic transverse wave data is positive in polarity, the polarity of the fourth seismic transverse wave data is unchanged. When/>When the fourth seismic transverse wave data is of negative polarity, the terminal performs reverse polarity on the fourth seismic transverse wave data to obtain fourth seismic transverse wave data of positive polarity after adjustment, and us 2 can represent slow transverse wave data, namely SS2 wave data.

305. And the terminal separates wave fields generated by the propagation of the target seismic transverse wave in stratum media to be detected under the ground based on the adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data to obtain a first wave field and a second wave field.

In the embodiment of the application, the terminal separates wave fields generated by the propagation of the target seismic transverse wave in stratum medium to be detected under the ground based on the third seismic transverse wave data and the fourth seismic transverse wave data which are both positive in polarity, and obtains a first wave field and a second wave field.

In some embodiments, where the target seismic transverse wave propagates in an azimuthally isotropic medium, the first wavefield is an SV wavefield, i.e., a vertically polarized seismic transverse wave wavefield, and the second wavefield is an SH wavefield, i.e., a horizontally polarized seismic transverse wave wavefield. And the terminal obtains an SV wave field based on third seismic transverse wave data, namely SV wave data, which are all positive in polarity. The terminal obtains an SH wave field based on fourth seismic transverse wave data, namely SH wave data, which are all positive in polarity. The SV wave field and the SH wave field can be accurately separated from the wave field generated after the excitation of the target seismic transverse wave by the third seismic transverse wave data and the fourth seismic transverse wave data after the polarity adjustment.

In some embodiments, where the target seismic shear wave propagates in an azimuthal anisotropic medium, the first wavefield is an SS1 wavefield, i.e., a fast seismic shear wave wavefield, and the second wavefield is an SS2 wavefield, i.e., a slow seismic shear wave wavefield. When the target seismic transverse wave passes through the azimuth anisotropic medium, the target seismic transverse wave is split to obtain an SS1 wave with a polarization direction parallel to the underground fracture direction and an SS2 wave with a polarization direction perpendicular to the underground fracture direction. The SS1 wave field is a wave field formed by SS1 waves after the excitation target seismic cross wave, and the SS2 wave field is a wave field formed by SS2 waves after the excitation target seismic cross wave. And the terminal obtains an SS1 wave field based on third seismic transverse wave data, namely SS1 wave data, which are all positive in polarity. The terminal obtains an SS2 wave field based on fourth seismic transverse wave data, i.e., SS2 wave data, which are both positive polarity. Through the third seismic transverse wave data and the fourth seismic transverse wave data after the polarity adjustment, the SS1 wave field and the SS2 wave field can be accurately separated from the wave field generated after the excitation of the target seismic transverse wave.

In some embodiments, the terminal is capable of post-processing the resulting first and second wavefields. For example, the terminal may be capable of performing offset imaging of the first wavefield and the second wavefield to obtain an image of a reflection interface that may reflect the layer position and reflectance values of the formation medium.

The embodiment of the application provides a method for separating a pure transverse wave field of a transverse wave controllable source excited at one time, which is used for acquiring seismic transverse wave data generated by exciting a target seismic transverse wave through the transverse wave controllable source in a direction parallel to the direction of a seismic survey line and a direction perpendicular to the direction of the seismic survey line respectively to obtain first seismic transverse wave data and second seismic transverse wave data, so that the acquisition of the seismic transverse wave data parallel to the direction of the seismic survey line and the direction perpendicular to the direction of the seismic survey line can be ensured. The method comprises the steps of carrying out horizontal component rotation on the collected seismic transverse wave data based on the target direction and the seismic line direction related to the property of the stratum medium to be detected under the ground, adapting to the change of the direction of target seismic transverse wave excitation, converting the collected seismic transverse wave data in any direction in a horizontal component rotation mode for target seismic transverse wave excitation, and obtaining third seismic transverse wave data parallel to the target direction after conversion and fourth seismic transverse wave data perpendicular to the target direction after conversion. The polarity of the third seismic transverse wave data is adjusted to be consistent with that of the fourth seismic transverse wave data, so that the seismic transverse wave data with the consistent polarity can be obtained, and the first wave field and the second wave field generated after the target seismic transverse wave is excited can be obtained through the seismic transverse wave data with the consistent polarity.

Fig. 10 is a schematic structural diagram of a device for separating a pure transverse wave field of a transverse wave controlled source excited at one time according to an embodiment of the present application. Referring to fig. 10, the apparatus includes: an acquisition module 1001, a horizontal two-component rotation module 1002, and a polarity adjustment module 1003.

The acquisition module 1001 is configured to acquire first seismic shear wave data and second seismic shear wave data, where the first seismic shear wave data is seismic shear wave data acquired in a direction parallel to a direction of a seismic line after a target seismic shear wave is excited by a shear wave controllable source, and the second seismic shear wave data is seismic shear wave data acquired in a direction perpendicular to the direction of the seismic line after the target seismic shear wave is excited by the shear wave controllable source;

The horizontal two-component rotation module 1002 is configured to perform horizontal two-component rotation on the first seismic shear wave data and the second seismic shear wave data based on a target direction and a seismic line direction related to a property of a formation medium to be detected under the ground, so as to obtain third seismic shear wave data and fourth seismic shear wave data, where the third seismic shear wave data corresponds to a first direction, the fourth seismic shear wave data corresponds to a second direction, the first direction is parallel to the target direction, and the second direction is perpendicular to the target direction;

The polarity adjustment module 1003 is configured to adjust the third seismic transverse wave data polarity and the fourth seismic transverse wave data polarity to be consistent, respectively, so as to obtain a first wave field and a second wave field, where the first wave field and the second wave field are processing results after the separation of the pure transverse wave field of the target seismic transverse wave.

In some embodiments, where the target seismic shear wave propagates in an azimuthally isotropic medium, the target direction is a line direction between the shot and the geophone; the shot point is the position of target seismic transverse wave excitation, and the wave detection point is the position for collecting the first seismic transverse wave data and the second seismic transverse wave data; the horizontal two-component rotation module 1002 is configured to determine a target direction based on coordinates of the shot point and coordinates of the detector; and performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain third seismic transverse wave data and fourth seismic transverse wave data.

In some embodiments, the target direction is the direction of the subsurface fracture in the event that the target seismic shear wave propagates in the azimuthal anisotropic medium; the horizontal two-component rotation module 1002 is configured to obtain a direction of an underground fracture based on an azimuth anisotropic medium; and performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the direction of the underground crack and the direction of the seismic survey line to obtain third seismic transverse wave data and fourth seismic transverse wave data.

In some embodiments, where the target seismic shear wave propagates in the azimuthal anisotropic medium, the target direction is perpendicular to the direction of projection of the axis of symmetry of the azimuthal anisotropic medium on a horizontal plane; the horizontal two-component rotation module 1002 is configured to obtain a target direction based on the azimuth anisotropic medium; and performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain third seismic transverse wave data and fourth seismic transverse wave data.

In some embodiments, the polarity adjustment module 1003 is configured to adjust the negative polarity of the third seismic shear wave data and the fourth seismic shear wave data to the positive polarity of the seismic shear wave data based on a first angle and a second angle, where the first angle is an angle between a direction in which the target seismic shear wave is excited and a direction of the seismic line, and the second angle is an angle between the target direction and the direction of the seismic line, to obtain adjusted third seismic shear wave data and adjusted fourth seismic shear wave data; and separating a wave field generated by the propagation of the target seismic transverse wave in the stratum medium to be detected under the ground based on the adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data to obtain a first wave field and a second wave field.

In some embodiments, where the target seismic shear wave propagates in an azimuthal anisotropic medium, the first wavefield is a fast shear wave wavefield and the second wavefield is a slow shear wave wavefield.

The embodiment of the application provides a pure transverse wave field separation device for once excitation of a transverse wave controllable source, which is used for acquiring first and second seismic transverse wave data by respectively acquiring seismic transverse wave data generated by exciting a target seismic transverse wave through the transverse wave controllable source in a direction parallel to the direction of a seismic survey line and a direction perpendicular to the direction of the seismic survey line, so that the acquisition of the seismic transverse wave data parallel to the direction of the seismic survey line and the direction perpendicular to the direction of the seismic survey line can be ensured. The method comprises the steps of carrying out horizontal component rotation on the collected seismic transverse wave data based on the target direction and the seismic line direction related to the property of the stratum medium to be detected under the ground, adapting to the change of the direction of target seismic transverse wave excitation, converting the collected seismic transverse wave data in any direction in a horizontal component rotation mode for target seismic transverse wave excitation, and obtaining third seismic transverse wave data parallel to the target direction after conversion and fourth seismic transverse wave data perpendicular to the target direction after conversion. The polarity of the third seismic transverse wave data is adjusted to be consistent with that of the fourth seismic transverse wave data, so that the seismic transverse wave data with the consistent polarity can be obtained, and the first wave field and the second wave field generated after the target seismic transverse wave is excited can be obtained through the seismic transverse wave data with the consistent polarity.

It should be noted that: the device for separating the pure transverse wave field of the primary excitation of the transverse wave controllable source provided by the embodiment only uses the division of the functional modules to illustrate, in practical application, the functional distribution can be completed by different functional modules according to the needs, namely, the internal structure of the terminal is divided into different functional modules so as to complete all or part of the functions described above. In addition, the device for separating the pure transverse wave field of the primary excitation of the transverse wave controllable source provided in the above embodiment and the embodiment of the method for separating the pure transverse wave field of the primary excitation of the transverse wave controllable source belong to the same concept, and the detailed implementation process of the device is shown in the method embodiment and will not be repeated here.

The embodiment of the application also provides a terminal, which comprises a processor and a memory, wherein at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor to realize the method for separating the wave field of the pure transverse wave excited by the transverse wave controllable source at one time.

The terminal 1100 includes: a processor 1101 and a memory 1102.

The processor 1101 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 1101 may be implemented in at least one hardware form of DSP (DIGITAL SIGNAL Processing), FPGA (Field Programmable GATE ARRAY ), PLA (Programmable Logic Array, programmable logic array). The processor 1101 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central Processing Unit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 1101 may be integrated with a GPU (Graphics Processing Unit, an image processing interactor) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 1101 may also include an AI (ARTIFICIAL INTELLIGENCE ) processor for processing computing operations related to machine learning.

Memory 1102 may include one or more computer-readable storage media, which may be non-transitory. Memory 1102 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 1102 is used to store at least one computer program for execution by processor 1101 to implement the method of the present application for single shot pure shear wave wavefield separation of a shear-wave vibroseis provided by an embodiment of the method.

In some embodiments, the terminal 1100 may further optionally include: a peripheral interface 1103 and at least one peripheral. The processor 1101, memory 1102, and peripheral interface 1103 may be connected by a bus or signal lines. The individual peripheral devices may be connected to the peripheral device interface 1103 by buses, signal lines or circuit boards. Optionally, the peripheral device comprises: at least one of radio frequency circuitry 1104, a display screen 1105, a camera assembly 1106, audio circuitry 1107, and a power supply 1108.

A peripheral interface 1103 may be used to connect I/O (Input/Output) related at least one peripheral device to the processor 1101 and memory 1102. In some embodiments, the processor 1101, memory 1102, and peripheral interface 1103 are integrated on the same chip or circuit board; in some other embodiments, any one or both of the processor 1101, memory 1102, and peripheral interface 1103 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

The Radio Frequency circuit 1104 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 1104 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 1104 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 1104 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 1104 may communicate with other devices via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (WIRELESS FIDELITY ) networks. In some embodiments, the radio frequency circuit 1104 may further include NFC (NEAR FIELD Communication) related circuits, which is not limited by the present application.

The display screen 1105 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 1105 is a touch display, the display 1105 also has the ability to collect touch signals at or above the surface of the display 1105. The touch signal may be input to the processor 1101 as a control signal for processing. At this time, the display screen 1105 may also be used to provide virtual buttons and/or virtual keyboards, also referred to as soft buttons and/or soft keyboards. In some embodiments, the display 1105 may be one and disposed on the front panel of the terminal 1100; in other embodiments, the display 1105 may be at least two, respectively disposed on different surfaces of the terminal 1100 or in a folded design; in other embodiments, the display 1105 may be a flexible display disposed on a curved surface or a folded surface of the terminal 1100. Even more, the display 1105 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The display screen 1105 may be made of materials such as an LCD (Liquid CRYSTAL DISPLAY) and an OLED (Organic Light-Emitting Diode).

The camera assembly 1106 is used to capture images or video. Optionally, the camera assembly 1106 includes a front camera and a rear camera. The front camera is disposed on the front panel of the terminal 1100, and the rear camera is disposed on the rear surface of the terminal 1100. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and Virtual Reality (VR) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 1106 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.

The audio circuit 1107 may include a microphone and a speaker. The microphone is used for collecting sound waves of users and environments, converting the sound waves into electric signals, and inputting the electric signals to the processor 1101 for processing, or inputting the electric signals to the radio frequency circuit 1104 for voice communication. For purposes of stereo acquisition or noise reduction, a plurality of microphones may be provided at different portions of the terminal 1100, respectively. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 1101 or the radio frequency circuit 1104 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, the audio circuit 1107 may also include a headphone jack.

A power supply 1108 is used to power the various components in terminal 1100. The power supply 1108 may be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 1108 includes a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, terminal 1100 also includes one or more sensors 1109. The one or more sensors 1109 include, but are not limited to: acceleration sensor 1110, gyroscope sensor 1111, pressure sensor 1112, optical sensor 1113, and proximity sensor 1114.

The acceleration sensor 1110 may detect the magnitudes of accelerations on three coordinate axes of a coordinate system established with the terminal 1100. For example, the acceleration sensor 1110 may be used to detect components of gravitational acceleration in three coordinate axes. The processor 1101 may control the display screen 1105 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal acquired by the acceleration sensor 1110. Acceleration sensor 1110 may also be used for the acquisition of motion data of a game or user.

The gyro sensor 1111 may detect a body direction and a rotation angle of the terminal 1100, and the gyro sensor 1111 may collect a 3D motion of the user on the terminal 1100 in cooperation with the acceleration sensor 1110. The processor 1101 may implement the following functions based on the data collected by the gyro sensor 1111: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.

Pressure sensor 1112 may be disposed on a side frame of terminal 1100 and/or on an underlying layer of display 1105. When the pressure sensor 1112 is disposed at a side frame of the terminal 1100, a grip signal of the terminal 1100 by a user may be detected, and the processor 1101 performs a left-right hand recognition or a shortcut operation according to the grip signal collected by the pressure sensor 1112. When the pressure sensor 1112 is disposed at the lower layer of the display screen 1105, the processor 1101 realizes control of the operability control on the UI interface according to the pressure operation of the user on the display screen 1105. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

The optical sensor 1113 is used to collect the intensity of ambient light. In one embodiment, the processor 1101 may control the display brightness of the display screen 1105 based on the intensity of ambient light collected by the optical sensor 1113. Optionally, when the ambient light intensity is high, the display brightness of the display screen 1105 is turned up; when the ambient light intensity is low, the display luminance of the display screen 1105 is turned down. In another embodiment, the processor 1101 may also dynamically adjust the shooting parameters of the camera assembly 1106 based on the intensity of ambient light collected by the optical sensor 1113.

A proximity sensor 1114, also called a distance sensor, is provided at the front panel of the terminal 1100. Proximity sensor 1114 is used to collect the distance between the user and the front of terminal 1100. In one embodiment, when the proximity sensor 1114 detects that the distance between the user and the front face of the terminal 1100 gradually decreases, the processor 1101 controls the display 1105 to switch from the bright screen state to the off screen state; when the proximity sensor 1114 detects that the distance between the user and the front surface of the terminal 1100 gradually increases, the display screen 1105 is controlled by the processor 1101 to switch from the off-screen state to the on-screen state.

Those skilled in the art will appreciate that the structure shown in fig. 11 is not limiting and that terminal 1100 may include more or fewer components than shown, or may combine certain components, or may employ a different arrangement of components.

The embodiment of the application also provides a computer readable storage medium, at least one computer program is stored in the computer readable storage medium, and the at least one computer program is loaded and executed by a processor to realize the method for separating the pure transverse wave field of the transverse wave controllable source in one-time excitation.

The embodiment of the application also provides a computer program product, which comprises a computer program, wherein the computer program is loaded and executed by a processor to realize the method for separating the wave field of the pure transverse wave excited by the transverse wave controllable source in one step.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing is merely an alternative embodiment of the present application and is not intended to limit the embodiment of the present application, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the embodiment of the present application should be included in the protection scope of the present application.

Claims

1. A method for separating a pure transverse wave field of a transverse wave controllable source excited at one time, which is characterized by comprising the following steps:

2. The method of claim 1, wherein the target direction is a line direction between a shot and a detector point in the case where the target seismic transverse wave propagates in an azimuthally isotropic medium; the shot point is the position of the target seismic transverse wave excitation, and the detection point is the position of collecting the first seismic transverse wave data and the second seismic transverse wave data;

The horizontal component rotation is performed on the first seismic transverse wave data and the second seismic transverse wave data based on a target direction and the seismic line direction related to the property of the stratum medium to be detected under the ground, so as to obtain third seismic transverse wave data and fourth seismic transverse wave data, including:

Determining the target direction based on the coordinates of the shot point and the coordinates of the detection point;

And performing horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the target direction and the seismic line direction to obtain the third seismic transverse wave data and the fourth seismic transverse wave data.

3. The method of claim 1, wherein the target direction is a direction of a subsurface fracture if the target seismic shear wave propagates in an azimuthally anisotropic medium;

acquiring the direction of the underground crack based on the azimuth anisotropic medium;

And carrying out horizontal component rotation on the first seismic transverse wave data and the second seismic transverse wave data based on the angle between the direction of the underground crack and the direction of the seismic line to obtain the third seismic transverse wave data and the fourth seismic transverse wave data.

4. The method of claim 1, wherein the target direction is a direction perpendicular to a direction of projection of an axis of symmetry of the azimuthal anisotropic medium in a horizontal plane, in a case where the target seismic transverse wave propagates in the azimuthal anisotropic medium;

acquiring the target direction based on the azimuth anisotropic medium;

5. The method of claim 1, wherein the aligning the third and fourth seismic shear wave data polarities to obtain a first wavefield and a second wavefield, respectively, comprises:

Adjusting negative polarity seismic transverse wave data in the third seismic transverse wave data and the fourth seismic transverse wave data into positive polarity seismic transverse wave data based on a first angle and a second angle, and obtaining adjusted third seismic transverse wave data and adjusted fourth seismic transverse wave data, wherein the first angle is an angle between the excitation direction of the target seismic transverse wave and the direction of the seismic line, and the second angle is an angle between the target direction and the direction of the seismic line;

And separating a wave field generated by the propagation of the target seismic transverse wave in the stratum medium to be detected under the ground based on the adjusted third seismic transverse wave data and the adjusted fourth seismic transverse wave data to obtain the first wave field and the second wave field.

6. The method of claim 5, wherein the first wavefield is a vertically polarized shear wave wavefield and the second wavefield is a horizontally polarized shear wave wavefield if the target seismic shear wave propagates in an azimuthally isotropic medium.

7. The method of claim 5, wherein the first wavefield is a fast shear wave wavefield and the second wavefield is a slow shear wave wavefield if the target seismic shear wave propagates in an azimuthal anisotropic medium.

8. A shear wave controllable source one-shot pure shear wave field separation device, characterized in that the device comprises:

9. A terminal comprising a processor and a memory, wherein the memory stores at least one computer program that is loaded and executed by the processor to implement the method of one-shot pure shear wave wavefield separation of the shear-wave vibroseis of any one of claims 1-7.

10. A computer readable storage medium having stored therein at least one computer program loaded and executed by a processor to implement the method of one-shot pure shear wave wavefield separation of a shear-wave vibroseis as in any one of claims 1-7.