CN104991277A - Method and device for judging oil-gas content of volcanic rock by using sound wave speed - Google Patents
Method and device for judging oil-gas content of volcanic rock by using sound wave speed Download PDFInfo
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Abstract
The invention provides a method and a device for judging oil-gas content of volcanic rock by using sound wave velocity, wherein the method comprises the following steps: acquiring acoustic logging data, logging data and seismic data of a target area to be researched; dividing a target area to be researched into a plurality of oil-gas layer section categories according to the acoustic wave time difference logging data, the logging data and the seismic data; establishing a change relation of the sound wave velocity along with the depth in each oil and gas layer section category according to the sound wave time difference logging data and the corresponding depth data; determining the interval velocity value of the target layer of the target area to be researched by utilizing the two-dimensional seismic survey line of the target area to be researched or the velocity spectrum data of the three-dimensional seismic work area covering the target area to be researched; and projecting the stratum velocity value into the variation relation, and judging the category of the hydrocarbon stratum to which the target stratum of the target area to be researched belongs according to the projection position. The method and the device can improve the accuracy of the judgment result of the oil-gas content of the volcanic rock and simplify the whole judgment and analysis process.
Description
Technical field
The invention relates to petroleum exploration and development technology, particularly, is the method and device that utilize acoustic velocity to judge volcanics oil-gas possibility about a kind of.
Background technology
Due to volcanics series of strata, often buried depth is comparatively large, and drilling period is long, and engineering difficulty is large, makes petroleum prospecting operating cost high.Therefore, for decision maker, not having sufficient evidence to show that the volcanics of certain target can form reservoir, and contain oil gas, is that the drilling well of fundamental purpose layer is often difficult to carry out operation with volcanics.Therefore, how to have made full use of the existing data in study area, relatively accurately and easily aiming circle make and break exhibition volcanic rock reservoir prediction and fluid detection have just been seemed particularly important.
The existing method analyzed volcanics mainly contains two kinds, wherein one adopts seismic attributes analysis method to carry out volcanics oil and gas prediction, seismic attributes analysis method mainly comprises frequency decay technology, AVO anisotropic analysis etc., cardinal principle is based on when containing liquid or gas in reservoir, the scattering of seismic event and the decay of seismic energy can be caused, therefore just utilize the Absorption Characteristics of seismic spectrum to carry out oil and gas prediction.But this kind of method requires that seismic data has higher signal to noise ratio (S/N ratio) and higher resolution, and data volume each position energy comparison is balanced.But volcanics is generally as basement rock, buried depth is comparatively large, and seismic data is generally poor, has much room for improvement by the method forecasting accuracy.In addition, higher with the level requirement of the method prediction volcanics oil-gas possibility to the personnel of explanation.
Another kind of analytical approach is by obtaining weight, magnetic, electricity, the multiple data of shake, utilize the process of heavy magnetoelectricity delamination, strengthen the distribution of inversion method prediction volcanic rock reservoir along layer continuation signal, predict combine by lithology, reservoir prediction and amplitude attenuation attributes, absorption coefficient difference on this basis, prediction oil-gas possibility.But this kind of method is very high to the requirement of data, not only needs seismic data, also needs the data such as gravity, magnetic force, electrical method, although precision of prediction may better, the method adopted is too loaded down with trivial details, not succinctly.
Summary of the invention
The fundamental purpose of the embodiment of the present invention be to provide a kind of utilize acoustic velocity to judge volcanics oil-gas possibility method and device, to make full use of existing drilling well, well logging, well logging and seismic data, from volcanics oil-containing, gassiness and not oily hourly velocity there is this key point of larger difference and start with, the quick volcanics of identification accurately oil-gas possibility, for volcanics oil-gas exploration provides positive evidence.
To achieve these goals, the embodiment of the present invention provides a kind of method utilizing acoustic velocity to judge volcanics oil-gas possibility, and described method comprises: obtain the sound wave measuring well curve of target area to be studied, logging data and geological data; According to described acoustic travel time logging data, logging data and geological data, described target area to be studied is divided into multiple oil gas interval classification; Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to the depth data of described acoustic travel time logging data and correspondence; Utilize the two-dimension earthquake survey line of described target area to be studied or covered the velocity spectrum data in 3-D seismics work area of described target area to be studied, determine the interval velocity value of the zone of interest of described target area to be studied; Described interval velocity value is projected in described variation relation, and judges the oil gas interval classification belonging to zone of interest of described target area to be studied according to projected position.
In one embodiment, above-mentioned oil gas interval classification comprises: the volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics.
In one embodiment, set up acoustic velocity in each described oil gas interval classification according to described acoustic travel time logging data, with the variation relation of the degree of depth, to comprise: calculate acoustic velocity according to described acoustic travel time logging data; Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to described acoustic velocity and described depth data.
In one embodiment, the interval velocity value of the zone of interest of target area to be studied described in above-mentioned determination, comprising: described velocity spectrum data are carried out to the interpolation processing under stratigraphic restraint, formation speed volume data; The interval velocity value of the zone of interest of target area to be studied is calculated according to described body of velocity data.
In one embodiment, above-mentioned is projected to described interval velocity value in described variation relation, comprising: according to the time of earthquake and the relation of the degree of depth, described interval velocity value and the relation of time is scaled the relation of described interval velocity value and the degree of depth; According to the relation of described interval velocity value and the degree of depth, described interval velocity value is projected in described variation relation.
The embodiment of the present invention also provides a kind of device utilizing acoustic velocity to judge volcanics oil-gas possibility, and described device comprises: data capture unit, for obtaining the sound wave measuring well curve of target area to be studied, logging data and geological data; Oil gas interval category division unit, for being divided into multiple oil gas interval classification according to described acoustic travel time logging data, logging data and geological data by described target area to be studied; Variation relation sets up unit, for setting up in each described oil gas interval classification acoustic velocity according to the depth data of described acoustic travel time logging data and correspondence with the variation relation of the degree of depth; Interval velocity value determining unit, for utilizing the two-dimension earthquake survey line of described target area to be studied or covering the velocity spectrum data in 3-D seismics work area of described target area to be studied, determined the interval velocity value of the zone of interest of described target area to be studied; Oil gas interval classification judging unit, for described interval velocity value being projected in described variation relation, and judges the oil gas interval classification belonging to zone of interest of described target area to be studied according to projected position.
In one embodiment, above-mentioned oil gas interval classification comprises: the volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics.
In one embodiment, above-mentioned variation relation set up unit specifically for: calculate acoustic velocity according to described acoustic travel time logging data; Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to described acoustic velocity and described depth data.
In one embodiment, above-mentioned interval velocity value determining unit specifically for: utilized the two-dimension earthquake survey line of described target area to be studied or covered the velocity spectrum data in 3-D seismics work area of described target area to be studied; Kriging regression algorithm is adopted to carry out body of velocity calculating to described velocity spectrum data, formation speed volume data; According to the high point coordinate of the zone of interest of described target area to be studied, in described body of velocity data, obtain the interval velocity value of the zone of interest of described target area to be studied.
In one embodiment, above-mentioned oil gas interval classification judging unit specifically for: according to the time of earthquake and the relation of the degree of depth, described interval velocity value and the relation of time are scaled the relation of described interval velocity value and the degree of depth; According to the relation of described interval velocity value and the degree of depth, described interval velocity value is projected in described variation relation; The oil gas interval classification belonging to zone of interest of described target area to be studied is judged according to projected position.
The beneficial effect of the embodiment of the present invention is, utilize the velocity amplitude of different lithology in different oil-gas possibility situation different, judge whether target to be studied grows volcanics, and whether analyze its oil-gas possibility, to improve the accuracy of the judged result of volcanics oil-gas possibility, and simplify the process of whole discriminatory analysis.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 judges the process flow diagram of the method for volcanics oil-gas possibility according to the acoustic velocity that utilizes of the embodiment of the present invention;
Fig. 2 is the degree of depth-velocity variations relation schematic diagram of different lithology according to the embodiment of the present invention and oil-gas possibility;
Fig. 3 is according to Carboniferous system end face seismic interval velocity planimetric map in the three-dimensional work area of the DBSLP of the embodiment of the present invention;
Fig. 4 is the longitudinal direction change schematic diagram according to the Da1 well anticlinal trap height point place seismic velocity of the embodiment of the present invention;
Fig. 5 judges the structural representation of the device of volcanics oil-gas possibility according to the acoustic velocity that utilizes of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provide a kind of utilize acoustic velocity to judge volcanics oil-gas possibility method and device.Below in conjunction with accompanying drawing, the present invention is described in detail.
The embodiment of the present invention provides a kind of method utilizing acoustic velocity to judge volcanics oil-gas possibility, and as shown in Figure 1, the method mainly comprises following steps:
Step S101: obtain the sound wave measuring well curve of target area to be studied, logging data and geological data;
Step S102: target area to be studied is divided into multiple oil gas interval classification according to acoustic travel time logging data, logging data and geological data;
Step S103: to set up in each oil gas interval classification acoustic velocity with the variation relation of the degree of depth according to the depth data of acoustic travel time logging data and correspondence;
Step S104: the velocity spectrum data in the two-dimension earthquake survey line utilizing target area to be studied or the 3-D seismics work area covering target area to be studied, determines the interval velocity value of the zone of interest of target area to be studied;
Step S105: interval velocity value is projected to acoustic velocity with in the variation relation of the degree of depth, and the oil gas interval classification belonging to zone of interest judging target area to be studied according to projected position.
By above-mentioned step S101 ~ step S105, the embodiment of the present invention utilize acoustic velocity to judge the method for volcanics oil-gas possibility makes full use of existing drilling well, well logging, well logging and seismic data, from volcanics oil-containing, gassiness and not oily hourly velocity there is this key point of larger difference and start with, the quick volcanics of identification accurately oil-gas possibility, for volcanics oil-gas exploration provides positive evidence.
Before obtaining corresponding data by above-mentioned steps S101, need first to carry out drilling well and choose work.The well boring and meet volcanics is selected in basin to be studied.In embodiments of the present invention, selected well must bore the zone of interest of meeting target to be studied, and there is sound wave measuring well curve and logging data; Target area to be studied must have geological data to cover.Afterwards, the sound wave measuring well curve of target area to be studied, logging data and geological data is obtained by step S101.
Wherein, oil gas interval classification described in above-mentioned steps S102 mainly comprises: the volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics etc., is classified target area to be studied according to acoustic travel time logging data, logging data and geological data according to above-mentioned several oil gas interval classifications.
In above-mentioned steps S103, first calculate acoustic velocity according to acoustic travel time logging data.Particularly, be calculate acoustic velocity by formula v=1/AC, wherein, v representation speed value, AC represents acoustic travel time logging value.After obtaining acoustic velocity according to the calculating of acoustic travel time logging value, namely set up in each oil gas interval classification in conjunction with the depth data corresponding to this acoustic velocity and each acoustic travel time logging data that acoustic velocity is with the variation relation of the degree of depth, the degree of depth set up-velocity variations relation as shown in Figure 2.
In step S104, determine that the process of interval velocity value specifically comprises: the velocity spectrum data in the two-dimension earthquake survey line utilizing target area to be studied or the 3-D seismics work area covering target area to be studied, to the simple interpolations process under velocity spectrum data acquisition stratigraphic restraint, in embodiments of the present invention, adopt conventional Kriging regression algorithm to carry out body of velocity calculating to velocity spectrum data, formation speed volume data; Again according to the high point coordinate of target area to be studied zone of interest, in body of velocity data, pick up the interval velocity value of the zone of interest in goal in research region.
After determining above-mentioned interval velocity value, perform above-mentioned steps S105, according to the time of earthquake and the relation of the degree of depth, interval velocity value and the relation of time are scaled the relation of interval velocity value and the degree of depth; Wherein, the time of earthquake and the relation of the degree of depth are expressed as: t=d/v, t are the time, and d is the degree of depth, and v is above-mentioned interval velocity value; Then, according to the relation of this interval velocity value and the degree of depth, interval velocity value to be projected in the degree of depth-velocity variations relation (represented by the star in Fig. 2, be a projection instance).The oil gas interval classification (the star position in such as Fig. 2 is gassiness Volcanic Area, then judge that the zone of interest of this target area to be studied belongs to gassiness volcanics) belonging to zone of interest that then can judge the target area to be studied corresponding to this interval velocity value according to the projected position of this interval velocity value in the degree of depth-velocity variations relation.
The acoustic velocity that utilizes of the embodiment of the present invention judges the method for volcanics oil-gas possibility, it is the velocity amplitude difference utilizing different lithology in different oil-gas possibility situation, by adding up in zone of interest the acoustic velocity of having bored and having met volcanics well in study area, setting up and being applicable to this area petroclastic rock, the velocity-depth variation relation schematic diagram of volcanics in different oily situation; Again by covering the velocity spectrum data in 3-D seismics work area, study area, determine the seismic velocity value of target zone of interest to be studied; The interval velocity value drawn utilizing earthquake projects on acoustic velocity variation relation schematic diagram, and then judge whether target to be studied grows volcanics, and whether analyze its oil-gas possibility, to improve the accuracy of the judged result of volcanics oil-gas possibility, and simplify the process of whole discriminatory analysis.
Below in conjunction with an instantiation to the embodiment of the present invention utilize acoustic velocity to judge the method for volcanics oil-gas possibility is described further.
Utilize the acoustic velocity that utilizes of the embodiment of the present invention to judge the method for volcanics oil-gas possibility, the oil-gas possibility of Junggar Basin agate lake Carboniferous structural trapping volcanics is judged.
Select area, Junggar Basin agate lake Da1 well anticlinal trap to be example, this trap has DBSLP 3-D seismics work area to cover.Structure elucidation data and the seismic velocity modal data of Carboniferous system end face is had in 3-D seismics work area; Da1 well anticline northeastward has 3 mouthfuls of wells to bore to meet Carboniferous system volcanics, and Junggar Basin Shixi area, carat beauty have the drilling well of more than 30 mouthfuls to bore chance Carboniferous system volcanics in front of the mountains, and all comprise sound wave measuring well curve.
The well of meeting Carboniferous system volcanics is bored in 30 mouthfuls, statistics Junggar Basin Shi Xi oil field, the beautiful gas field of carat etc., according to the acoustic logging numerical value that the volcanics statistics of the volcanics of the petroclastic rock of the Carboniferous system, not oily, the volcanics of oil-containing and gassiness is corresponding, interval transit time speed under different lithology and different oil-gas possibility is scaled by v=1/AC, set up the variation relation schematic diagram between interval transit time speed and the degree of depth, as shown in Figure 2.
Utilize the DBSLP 3-D seismics velocity spectrum data covering Da1 well anticlinal trap, under layer constraint interpolation, form body of velocity data.Along Carboniferous system end face, body of velocity is cut into slices, observe within the scope of Da1 well anticlinal trap and there is obvious speed low value district, as shown in Figure 3.Analyze the longitudinal direction change of Da1 well anticlinal trap height point place speed, speed has obvious reduction at Carboniferous system end face, and as shown in Figure 4, under the time domain of Carboniferous system end face 5000ms, velocity amplitude is approximately 5400m/s.
Utilize the time of DBSLP earthquake and the relation of the degree of depth, conversing the degree of depth corresponding to 5000ms is 5900m.The velocity amplitude of the Da1 well anticlinal trap height point place 5400m/s that seismic velocity spectrum is drawn, project on acoustic velocity and change in depth relation schematic diagram, the speed of speed apparently higher than petroclastic rock at Da1 well anticlinal trap height point place can be found, be positioned at the interval range of gassiness volcanics, therefore infer that the Da1 well anticlinal trap Carboniferous system grows volcanics, and gassiness in trap.
The embodiment of the present invention also provides a kind of device utilizing acoustic velocity to judge volcanics oil-gas possibility, as shown in Figure 5, this device mainly comprises: data capture unit 1, oil gas interval category division unit 2, variation relation set up unit 3, interval velocity value determining unit 4 and oil gas interval classification judging unit 5 etc.
Wherein, above-mentioned data capture unit 1, for obtaining the sound wave measuring well curve of target area to be studied, logging data and geological data.
Before obtaining corresponding data by above-mentioned data capture unit 1, need first to carry out drilling well and choose work.The well boring and meet volcanics is selected in basin to be studied.In embodiments of the present invention, selected well must bore the zone of interest of meeting target to be studied, and there is sound wave measuring well curve and logging data; Target area to be studied must have geological data to cover.Afterwards, the sound wave measuring well curve of target area to be studied, logging data and geological data is obtained by data capture unit 1.
Oil gas interval category division unit 2 is for being divided into multiple oil gas interval classification according to acoustic travel time logging data, logging data and geological data by target area to be studied.Wherein, oil gas interval classification mainly comprises: the volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics etc.
Variation relation sets up unit 3, for setting up in each oil gas interval classification acoustic velocity according to the depth data of acoustic travel time logging data and correspondence with the variation relation of the degree of depth.Particularly, variation relation is set up unit 3 and is first calculated acoustic velocity according to acoustic travel time logging data.Particularly, be calculate acoustic velocity by formula v=1/AC, wherein, v representation speed value, AC represents acoustic travel time logging value.After obtaining acoustic velocity according to the calculating of acoustic travel time logging value, namely to set up in each oil gas interval classification acoustic velocity with the variation relation of the degree of depth in conjunction with the depth data corresponding to this acoustic velocity and each acoustic travel time logging data, variation relation sets up the degree of depth-velocity variations relation that unit 3 sets up as shown in Figure 2.
Interval velocity value determining unit 4, for utilizing the two-dimension earthquake survey line of target area to be studied or covering the velocity spectrum data in 3-D seismics work area of target area to be studied, determined the interval velocity value of the zone of interest of target area to be studied.In practical application, this interval velocity value determining unit 4 was specifically for utilizing the two-dimension earthquake survey line of described target area to be studied or covering the velocity spectrum data in 3-D seismics work area of described target area to be studied, to the simple interpolations process under velocity spectrum data acquisition stratigraphic restraint, in embodiments of the present invention, adopt conventional Kriging regression algorithm to carry out body of velocity calculating to velocity spectrum data, formation speed volume data; Again according to the high point coordinate of target area to be studied zone of interest, in body of velocity data, pick up the interval velocity value of the zone of interest in goal in research region.
After determining above-mentioned interval velocity value, by above-mentioned oil gas interval classification judging unit 5, according to the time of earthquake and the relation of the degree of depth, interval velocity value and the relation of time are scaled the relation of interval velocity value and the degree of depth; Wherein, the time of earthquake and the relation of the degree of depth are expressed as: t=d/v, t are the time, and d is the degree of depth, and v is above-mentioned interval velocity value; Then, according to the relation of this interval velocity value and the degree of depth, interval velocity value to be projected in the degree of depth-velocity variations relation (represented by the star in Fig. 2, be a projection instance).The oil gas interval classification (the star position in such as Fig. 2 is gassiness Volcanic Area, then judge that the zone of interest of this target area to be studied belongs to gassiness volcanics) belonging to zone of interest that then can judge the target area to be studied corresponding to this interval velocity value according to the projected position of this interval velocity value in the degree of depth-velocity variations relation.
The acoustic velocity that utilizes of the embodiment of the present invention judges the device of volcanics oil-gas possibility, it is the velocity amplitude difference utilizing different lithology in different oil-gas possibility situation, by adding up in zone of interest the acoustic velocity of having bored and having met volcanics well in study area, setting up and being applicable to this area petroclastic rock, the velocity-depth variation relation schematic diagram of volcanics in different oily situation; Again by covering the velocity spectrum data in 3-D seismics work area, study area, determine the seismic velocity value of target zone of interest to be studied; The interval velocity value drawn utilizing earthquake projects on acoustic velocity variation relation schematic diagram, and then judge whether target to be studied grows volcanics, and whether analyze its oil-gas possibility, to improve the accuracy of judged result, and simplify the process of whole discriminatory analysis.
One of ordinary skill in the art will appreciate that the hardware that all or part of step realized in above-described embodiment method can carry out instruction relevant by program has come, this program can be stored in a computer read/write memory medium, such as ROM/RAM, magnetic disc, CD etc.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. utilize acoustic velocity to judge a method for volcanics oil-gas possibility, it is characterized in that, described method comprises:
Obtain the sound wave measuring well curve of target area to be studied, logging data and geological data;
According to described acoustic travel time logging data, logging data and geological data, described target area to be studied is divided into multiple oil gas interval classification;
Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to the depth data of described acoustic travel time logging data and correspondence;
Utilize the two-dimension earthquake survey line of described target area to be studied or covered the velocity spectrum data in 3-D seismics work area of described target area to be studied, determine the interval velocity value of the zone of interest of described target area to be studied;
Described interval velocity value is projected in described variation relation, and judges the oil gas interval classification belonging to zone of interest of described target area to be studied according to projected position.
2. the method utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 1, is characterized in that, described oil gas interval classification comprises:
The volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics.
3. the method utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 1, is characterized in that, sets up acoustic velocity in each described oil gas interval classification, with the variation relation of the degree of depth, comprising according to described acoustic travel time logging data:
Acoustic velocity is calculated according to described acoustic travel time logging data;
Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to described acoustic velocity and described depth data.
4. the method utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 1, is characterized in that, determines the interval velocity value of the zone of interest of described target area to be studied, comprising:
Kriging regression algorithm is adopted to carry out body of velocity calculating to described velocity spectrum data, formation speed volume data;
According to the high point coordinate of the zone of interest of described target area to be studied, in described body of velocity data, obtain the interval velocity value of the zone of interest of described target area to be studied.
5. the method utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 1, is characterized in that, described interval velocity value is projected in described variation relation, comprises:
According to the time of earthquake and the relation of the degree of depth, described interval velocity value and the relation of time are scaled the relation of described interval velocity value and the degree of depth;
According to the relation of described interval velocity value and the degree of depth, described interval velocity value is projected in described variation relation.
6. utilize acoustic velocity to judge a device for volcanics oil-gas possibility, it is characterized in that, described device comprises:
Data capture unit, for obtaining the sound wave measuring well curve of target area to be studied, logging data and geological data;
Oil gas interval category division unit, for being divided into multiple oil gas interval classification according to described acoustic travel time logging data, logging data and geological data by described target area to be studied;
Variation relation sets up unit, for setting up in each described oil gas interval classification acoustic velocity according to the depth data of described acoustic travel time logging data and correspondence with the variation relation of the degree of depth;
Interval velocity value determining unit, for utilizing the two-dimension earthquake survey line of described target area to be studied or covering the velocity spectrum data in 3-D seismics work area of described target area to be studied, determined the interval velocity value of the zone of interest of described target area to be studied;
Oil gas interval classification judging unit, for described interval velocity value being projected in described variation relation, and judges the oil gas interval classification belonging to zone of interest of described target area to be studied according to projected position.
7. the device utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 6, is characterized in that, described oil gas interval classification comprises:
The volcanics of petroclastic rock, not oily, oil-containing volcanics and gassiness volcanics.
8. the device utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 6, is characterized in that, described variation relation set up unit specifically for:
Acoustic velocity is calculated according to described acoustic travel time logging data;
Acoustic velocity is set up in each described oil gas interval classification with the variation relation of the degree of depth according to described acoustic velocity and described depth data.
9. the device utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 6, is characterized in that, described interval velocity value determining unit specifically for:
Utilize the two-dimension earthquake survey line of described target area to be studied or cover the velocity spectrum data in 3-D seismics work area of described target area to be studied;
Kriging regression algorithm is adopted to carry out body of velocity calculating to described velocity spectrum data, formation speed volume data;
According to the high point coordinate of the zone of interest of described target area to be studied, in described body of velocity data, obtain the interval velocity value of the zone of interest of described target area to be studied.
10. the device utilizing acoustic velocity to judge volcanics oil-gas possibility according to claim 6, is characterized in that, described oil gas interval classification judging unit specifically for:
According to the time of earthquake and the relation of the degree of depth, described interval velocity value and the relation of time are scaled the relation of described interval velocity value and the degree of depth;
According to the relation of described interval velocity value and the degree of depth, described interval velocity value is projected in described variation relation;
The oil gas interval classification belonging to zone of interest of described target area to be studied is judged according to projected position.
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