CN115680592A - Method, device and equipment for determining fracturing effectiveness parameters and storage medium - Google Patents
Method, device and equipment for determining fracturing effectiveness parameters and storage medium Download PDFInfo
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Abstract
The application provides a method, a device, equipment and a storage medium for determining fracturing effectiveness parameters, and belongs to the technical field of oil and gas development. The method comprises the following steps: obtaining physical parameters of a fractured well to be determined, wherein the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fractured well; determining the fracturing fracture volume corresponding to the fracturing well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter; determining a permeability recovery parameter corresponding to the fractured well according to the permeability parameter, wherein the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage; and determining the fracturing effectiveness parameters corresponding to the fracturing well according to the fracturing fracture volume and the permeability recovery parameters. Due to the fact that the influence of permeability change of the fracturing well is considered from two dimensions of the volume and the permeability, the accuracy of the determined fracturing effectiveness parameter is improved.
Description
Technical Field
The application relates to the technical field of oil and gas development, in particular to a method, a device, equipment and a storage medium for determining fracturing validity parameters.
Background
At present, the fracturing technology becomes an important technology for the development of a low-permeability fracturing well, and in order to ensure that the fractured fracturing well can meet the requirements of industrial oil-gas flow, before the fracturing of the fracturing well, the effective fracturing parameters of the fracturing well need to be determined; and the fracturing effectiveness parameter is used for indicating whether the oil and gas yield of the fractured well reaches the standard or not.
In the related art, technicians obtain the static reserves of a fractured well and the permeability of the fractured well before fracturing; determining the oil gas yield of the fracturing well according to the static reserve and the permeability of the reservoir; if the oil gas yield of the fracturing well is larger than a preset value, determining that the oil gas yield of the fracturing well reaches the standard; and if the oil gas yield of the fracturing well is not greater than the preset value, determining that the oil gas yield of the fracturing well does not reach the standard.
However, in the process of fracturing a fractured well by the fracturing fluid, the permeability of the fractured well is reduced by the influence of the pressure of the fracturing fluid, so that the oil and gas yield of the qualified fractured well may be less than a preset value after fracturing, and therefore, the accuracy of the fracturing effectiveness parameter determined by the method in the related art is low.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a storage medium for determining fracturing effectiveness parameters, and the accuracy of drilling coincidence information of a exploration area can be improved. The technical scheme is as follows:
in one aspect, the present application provides a method for determining a fracture effectiveness parameter, the method comprising:
obtaining physical parameters of a fracturing well to be determined, wherein the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fracturing well;
determining a fracturing volume corresponding to the fracturing well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter, wherein the fracturing volume is used for representing the maximum fracturing volume corresponding to the fracturing well in a fracturing stage;
determining a permeability recovery parameter corresponding to the fractured well according to the permeability parameter, wherein the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage;
and determining a fracturing effectiveness parameter corresponding to the fractured well according to the fracturing volume and the permeability recovery parameter, wherein the fracturing effectiveness parameter is used for indicating whether the oil and gas yield after the fracturing of the fractured well reaches the standard or not.
In one possible implementation manner, the determining a fracture volume corresponding to the fracture well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter includes:
determining an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter;
determining the fracturing oil gas yield of the fracturing well according to the energy storage parameters;
and determining the fracture volume of the fractured well according to the fractured oil and gas yield.
In another possible implementation manner, the determining an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter includes:
determining an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter by the following formula I;
the formula I is as follows:
wherein,
representing the energy storage parameter, K representing the permeability parameter, H representing the effective thickness parameter, Φ representing the porosity parameter, S g Representing the hydrocarbon saturation parameter.
In another possible implementation, the determining a fractured hydrocarbon production of the fractured well according to the energy storage parameter includes:
determining the fracturing oil gas yield of the fracturing well according to the energy storage parameters through a second formula;
the second formula is as follows:
wherein Q g Representing the production of the fractured oil and gas,
representing the energy storage parameter.
In another possible implementation, the determining a fracture volume of the fractured well according to the fractured hydrocarbon production comprises:
determining the fracturing volume corresponding to the fracturing well according to the fracturing oil gas yield and the following formula III;
the formula III is as follows:
wherein, V f Represents the fracture volume, Q g Representing the fractured oil and gas production.
In another possible implementation manner, the determining, according to the fracture volume and the permeability recovery parameter, a fracture effectiveness parameter corresponding to the fractured well includes:
determining a length of a fracture formed in the fractured well, determining an impact width of the fracture according to the fracture volume and the length;
determining an effective seepage range parameter corresponding to the fracturing well;
if the effective seepage range parameter is not smaller than the influence width and the permeability recovery parameter is not smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a first parameter, wherein the first parameter is used for indicating that the oil gas yield after the fracturing of the fracturing well reaches the standard; and if the effective seepage range parameter is smaller than the influence width or the permeability recovery parameter is smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a second parameter, wherein the second parameter is used for indicating that the oil and gas yield after the fracturing of the fractured well does not reach the standard.
In another possible implementation manner, the determining an effective seepage range parameter corresponding to the fractured well includes:
determining the maximum production pressure difference, the viscosity of stratum oil gas and the production time when the fracturing well is produced;
determining an effective seepage range parameter corresponding to the fractured well according to the maximum production pressure difference, the formation oil and gas viscosity, the production time, the permeability parameter and the porosity parameter by using a fourth formula;
the formula four is as follows:
wherein L represents the effective seepage range parameter, K represents the permeability parameter, Δ p represents the maximum production pressure difference, t represents the production time, Φ represents the porosity parameter, and μ represents the formation hydrocarbon viscosity.
In another aspect, the present application provides a fracture effectiveness parameter determination apparatus, the apparatus comprising:
the system comprises an acquisition module, a determination module and a control module, wherein the acquisition module is used for acquiring physical parameters of a fractured well to be determined, and the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fractured well;
a first determining module, configured to determine, according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter, a fracture volume corresponding to the fractured well, where the fracture volume is used to represent a maximum fracture volume corresponding to the fractured well in a fracturing stage;
the second determination module is used for determining a permeability recovery parameter corresponding to the fractured well, and the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage;
and the third determination module is used for determining a fracturing effectiveness parameter corresponding to the fractured well according to the fracturing fracture volume and the permeability recovery parameter, wherein the fracturing effectiveness parameter is used for indicating whether the oil and gas yield of the fractured well after fracturing reaches the standard or not.
In one possible implementation manner, the second determining module includes:
the first determining unit is used for determining the energy storage parameters of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter;
the second determining unit is used for determining the fracturing oil gas yield of the fracturing well according to the energy storage parameters;
and the third determination unit is used for determining the fracturing fracture volume of the fracturing well according to the fracturing oil gas yield.
In another possible implementation manner, the first determining unit is configured to determine an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter by using the following formula one;
the formula I is as follows:
wherein,
representing the energy storage parameter, K representing the permeability parameter, H representing the effective thickness parameter, Φ representing the porosity parameter, S g Representing the hydrocarbon saturation parameter.
In another possible implementation manner, the second determining unit is configured to determine, according to the energy storage parameter, a fractured oil and gas yield of the fractured well through a second formula;
the formula II is as follows:
wherein Qg represents the fracturing hydrocarbon production,
representing the energy storage parameter.
In another possible implementation manner, the third determining unit is configured to determine, according to the fractured oil and gas yield, a fracture volume corresponding to the fractured well through the following formula three;
the formula III is as follows:
wherein, V f Represents the fracture volume, Q g Representing the fractured hydrocarbon production.
In another possible implementation manner, the third determining module is configured to determine a length of a fracture formed in the fractured well, and determine an influence width of the fracture according to the fracture volume and the length; determining effective seepage range parameters corresponding to the fracturing well; if the effective seepage range parameter is not smaller than the influence width and the permeability recovery parameter is not smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a first parameter, wherein the first parameter is used for indicating that the oil gas yield after the fracturing of the fracturing well reaches the standard; and if the effective seepage range parameter is smaller than the influence width or the permeability recovery parameter is smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a second parameter, wherein the second parameter is used for indicating that the oil and gas yield after the fracturing of the fractured well does not reach the standard.
In another possible implementation manner, the third determination module is configured to determine a maximum production pressure difference, a formation oil and gas viscosity, and a production time when the fractured well is produced; determining an effective seepage range parameter corresponding to the fractured well according to the maximum production pressure difference, the formation oil and gas viscosity, the production time, the permeability parameter and the porosity parameter by using a fourth formula;
the formula four is as follows:
wherein L represents the effective seepage range parameter, K represents the permeability parameter, Δ p represents the maximum production pressure difference, t represents the production time, Φ represents the porosity parameter, and μ represents the formation hydrocarbon viscosity.
In another aspect, an embodiment of the present application provides a computer device, where the computer device includes: a processor and a memory, the memory having stored therein at least one program code, the at least one program code being loaded by the processor and executed to implement the operations performed in the method of determining fracture effectiveness parameters as described in any of the possible implementations above.
In another aspect, the present disclosure provides a computer-readable storage medium, where at least one program code is stored, and the at least one program code is loaded and executed by a processor to implement the operations performed in the method for determining a fracture effectiveness parameter according to any one of the foregoing possible implementation manners.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the embodiment of the application provides a method for determining fracturing validity parameters, and the fracturing validity parameters are determined according to fracturing fracture volume and permeability recovery parameters, the maximum fracturing volume of a fracturing well in a fracturing stage and the maximum permeability parameters of the fracturing well in a fracturing flowback stage are parameters of the fracturing well during fracturing, namely, the influence of permeability change of the fracturing well is considered from two dimensions of volume and permeability, and therefore the accuracy of the determined fracturing validity parameters is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method of determining a fracture effectiveness parameter in accordance with an exemplary embodiment;
FIG. 2 is a schematic illustration of a plot of fractured hydrocarbon production versus energy storage parameters shown in accordance with an exemplary embodiment;
FIG. 3 is a schematic illustration of a plot of fracturing hydrocarbon production versus fracturing volume, according to an exemplary embodiment;
FIG. 4 is a schematic illustrating a fracture volume corresponding to a first hydrocarbon reservoir of a target fractured well according to an exemplary embodiment;
FIG. 5 is a schematic illustration of a corresponding fracture volume of a second hydrocarbon reservoir of a target fractured well shown according to an exemplary embodiment;
FIG. 6 is a schematic illustrating a fracture volume corresponding to a third hydrocarbon reservoir of a target fractured well according to an exemplary embodiment;
FIG. 7 is a block diagram illustrating a fracture effectiveness parameter determination apparatus in accordance with an exemplary embodiment;
FIG. 8 is a block diagram illustrating a fracture effectiveness parameter determination apparatus in accordance with an exemplary embodiment;
FIG. 9 is a block diagram illustrating a configuration of a computer device, according to an example embodiment.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a flow chart illustrating a method for determining a fracture effectiveness parameter in accordance with an exemplary embodiment. Referring to fig. 1, the method includes:
101. and the computer equipment acquires physical parameters of the fractured well to be determined, wherein the physical parameters comprise permeability parameters, effective thickness parameters, porosity parameters and oil-gas saturation parameters of the fractured well.
In one possible implementation manner, the computer equipment stores the corresponding relation between the fracturing well identification and the physical property parameter; correspondingly, the method comprises the following steps: and the computer equipment determines the physical property parameters of the fracturing well to be determined corresponding to the target fracturing well identification from the stored corresponding relation between the fracturing well identification and the physical property parameters according to the target fracturing well identification of the fracturing well to be determined.
In one possible implementation mode, when the fracturing well is explored, a worker tests the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter of the fracturing well to obtain the physical property parameter of the fracturing well; and inputting the fracturing well identification of the fracturing well and the physical parameters of the fracturing well into computer equipment, and performing associated storage on the fracturing well identification of the reservoir fracturing well and the physical parameters of the fracturing well by the computer equipment to obtain the corresponding relation between the fracturing well identification and the physical parameters.
Optionally, the permeability parameter represents permeability of the fractured well, the effective thickness parameter represents permeability of the fractured well, the porosity parameter represents porosity of the fractured well, and the hydrocarbon saturation parameter represents hydrocarbon saturation of the fractured well.
102. And the computer equipment determines the fracturing volume corresponding to the fracturing well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter, wherein the fracturing volume is used for expressing the maximum fracturing volume corresponding to the fracturing well in the fracturing stage.
In a possible implementation manner, the step of determining, by the computer device, a fracture volume corresponding to the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the oil-gas saturation parameter includes: the computer equipment determines the energy storage parameters of the fracturing well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter; determining the yield of the fracturing oil gas of the fracturing well according to the energy storage parameters; and determining the fracturing fracture volume of the fractured well according to the fracturing oil gas yield.
In one possible implementation manner, the step of determining, by the computer device, an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter includes: the computer equipment determines the energy storage parameters of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter through the following formula I;
the formula I is as follows:
wherein,
representing an energy storage parameter, K a permeability parameter, H an effective thickness parameter, phi a porosity parameter, S g Representing the hydrocarbon saturation parameter.
In one possible implementation manner, the step of determining, by the computer device, the yield of the fracturing oil gas of the fractured well according to the energy storage parameter is as follows: determining the yield of the fracturing oil gas of the fracturing well by the computer equipment according to the energy storage parameters through the following formula II;
the second formula is as follows:
wherein Q is g The yield of the fracturing oil gas is shown,
representing an energy storage parameter.
The second formula is first relation data, and the first relation data is used for expressing the relation between the fracturing oil gas yield and the energy storage parameter. The fracturing oil gas yield represents the actual oil gas yield of the fracturing well during fracturing, and the energy storage parameter represents the simulated oil gas yield of the fracturing well during fracturing.
In one possible implementation, the computer device determines a relationship curve between the fractured oil and gas production and the energy storage parameter according to actual oil and gas production and simulated oil and gas production of the plurality of fractured wells during fracturing, and determines first relationship data according to the relationship curve.
For example, the computer device determines the relationship curve between the fractured oil and gas yield and the energy storage parameter according to the actual oil and gas yield and the simulated oil and gas yield of 56 fractured wells of a certain dense gas field in fracturing, and the relationship curve is shown in fig. 2. Wherein, the abscissa represents the energy storage parameters of the fracturing well and is dimensionless; the ordinate represents the actual oil and gas production of the fractured well at the time of fracturing in units of ten thousand squares per day.
In one possible implementation, the step of determining the fracture volume of the fractured well according to the fractured oil and gas yield by the computer device is as follows: determining the corresponding fracturing volume of a fracturing well by the computer equipment according to the fracturing oil gas yield through a third formula;
the formula III is as follows:
wherein, V f Denotes the fracture volume, Q g Representing the fracturing oil and gas yield.
It should be noted that formula three is second relational data, and the second relational data is used for expressing the relationship between the fracturing oil gas yield and the fracturing volume. The fracture volume represents the maximum volume of the fracture that the fractured well will produce when fractured.
In one possible implementation, the computer device determines a relationship curve between the fractured hydrocarbon production and the fractured volume according to the actual hydrocarbon production and the fractured volume of the plurality of fractured wells at the time of fracturing, and determines second relationship data according to the relationship curve.
For example, the computer device determines the relationship between the fractured oil and gas yield and the fracture volume according to the actual oil and gas yield and the fracture volume of 56 fractured wells of a certain dense gas field when fracturing, as shown in fig. 3. The horizontal axis represents the actual oil and gas yield of the fracturing well during fracturing, and the unit is ten thousand square/day, and the vertical axis represents the fracturing fracture volume of the fracturing well during fracturing, and the unit is ten thousand cubic meters.
In one possible implementation manner, the computer device determines, according to the first relationship data and the second relationship data, third relationship data between the fracture volume and the energy storage parameter as follows:
wherein, V f Representing the fracture volume, in units of ten thousand cubic meters,
representing energy storage parameters, dimensionless.
103. And the computer equipment determines a permeability recovery parameter corresponding to the fractured well according to the permeability parameter, wherein the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage.
The permeability recovery parameter corresponding to the fractured well is used for representing the maximum permeability of the fractured well after fracturing. It should be noted that, in the fracturing process of the fractured well, the permeability of the fractured well decreases with the increase of the pressure of the surrounding fractured fluid, in the flowback process of the fractured well, the pressure is slowly released, the permeability of the fractured well increases with the decrease of the pressure of the surrounding fractured fluid, and the maximum permeability of the fractured well after recovery is the permeability recovery parameter corresponding to the fractured well.
In a possible implementation manner, the step of determining, by the computer device, a permeability recovery parameter corresponding to the fractured well according to the permeability parameter is: the method comprises the steps that computer equipment obtains the fracture pressure of a stratum where a fracturing well is located, and according to the fracture pressure and permeability parameters of the fracturing well, a first corresponding permeability parameter when fracturing of the fracturing well is finished is determined through the following formula V; determining a permeability recovery parameter corresponding to the fractured well according to the first permeability parameter and the fracture pressure and through a formula VI;
the formula five is as follows: K/K j ＝1.784e -0.058P
The formula six: k/k i ＝3.0332P -0.721
Wherein K represents a permeability recovery parameter, K represents a permeability parameter of the fractured well, K i Representing a first permeability parameter and P representing the fracture pressure of the formation in which the fracture well is located.
It should be noted that the fracture pressure gradient of the formation during fracturing is generally a fixed value, and the computer device may determine the fracture pressure of the formation where the fractured well is located according to the depth of the fractured well.
In one possible implementation manner, the fracture pressure gradient of the stratum during fracturing is 0.02MPa/m, the computer device obtains the depth of the fracturing well, and the product of the depth of the fracturing well and the fracture pressure gradient is determined as the fracture pressure of the stratum where the fracturing well is located. That is, P =0.02 × t; where P represents the fracture pressure of the formation in which the fracture well is located and T represents the depth of the fracture well.
104. And the computer equipment determines a fracturing effectiveness parameter corresponding to the fracturing well according to the fracturing fracture volume and the permeability recovery parameter, wherein the fracturing effectiveness parameter is used for indicating whether the oil-gas yield of the fractured well reaches the standard or not after the fracturing.
In a possible implementation manner, the step of determining, by the computer device, the fracture effectiveness parameter corresponding to the fractured well according to the fracture volume and the permeability recovery parameter is as follows: the computer device determines the length of a fracture formed in the fractured well and determines the influence width of the fracture according to the fracture volume and the length; determining an effective seepage range parameter corresponding to a fracturing well; if the effective seepage range parameter is not less than the influence width and the permeability recovery parameter is not less than the preset permeability parameter, determining that the fracturing effectiveness parameter is a first parameter, wherein the first parameter is used for indicating that the oil gas yield after fracturing of the fracturing well reaches the standard; and if the effective seepage range parameter is smaller than the influence width or the permeability recovery parameter is smaller than the preset permeability parameter, determining that the fracturing effectiveness parameter is a second parameter, wherein the second parameter is used for indicating that the oil gas yield after fracturing of the fracturing well does not reach the standard.
In the embodiment of the present application, the numerical value of the preset permeability parameter is not specifically limited, and may be set and modified as needed.
In one possible implementation, the predetermined permeability parameter may be determined based on actual fracturing results of an existing fractured well. Optionally, the preset permeability parameter is any value between 0.03mD and 0.09mD, for example, the preset permeability parameter is 0.04mD, 0.05mD, or 0.06mD.
For example, the preset permeability parameter is 0.05mD. And the fracturing target horizon H7 section of the well A1 has the depth of 2109-2116m, the original formation pressure of 21MPa, the original permeability of 0.5mD and the viscosity of natural gas of 0.0027mPa.s. The influence width D of the crack determined by the computer equipment through the determination method of the fracturing effectiveness parameter is 80m; the determined effective seepage range parameter L is 90m, and the determined permeability recovery value after fracturing flowback, namely the permeability recovery parameter is 0.167mD; and the computer equipment determines that the effective seepage range parameter L is greater than D and the permeability recovery value k is greater than 0.05mD, and determines that the oil-gas yield after fracturing of the fractured well reaches the standard.
For another example, the predetermined permeability parameter is 0.05mD. The target fracturing layer of the B1 well is a T2 section, the depth is 2601-2606m, the original formation pressure is 26MPa, the original permeability is 0.12mD, and the viscosity of natural gas is 0.002mPa.s. The influence width D determined by the computer equipment through the determination method of the fracturing effectiveness parameter is 92m, the determined effective seepage range parameter L is 72m, and the determined permeability recovery value after fracturing flowback, namely the permeability recovery parameter, is 0.035mD; and the computer equipment determines that the effective seepage range parameter L is less than D and the permeability recovery value k is less than 0.05mD, and determines that the oil-gas yield after fracturing of the fractured well does not reach the standard.
In the embodiment of the application, the preset permeability parameter is determined according to the actual fracturing result of the existing fracturing well, so that the preset permeability parameter is ensured to be closer to the actual preset permeability parameter, and the accuracy of the fracturing effectiveness parameter determined according to the preset permeability parameter is improved.
In one possible implementation manner, the computer device determines the influence width of the fracture according to the fracture volume and the length of the fracture by the steps of: determining the influence width of the fracture by the computer equipment according to the fracture volume and the fracture length through the following formula seven;
the formula seven: d = V f /2C
Wherein D represents the influence width of the crack, V f Representing the fracture volume and C the length of the fracture.
In one possible implementation, the length of the crack is 200m, and accordingly, the influence width D = V of the crack f /400. Optionally, the fracture volume is used to represent the volume of the fracture formed by the fracture, wherein the fracture volume
Accordingly, the influence width of the fracture formed by fracturing
In one possible implementation, the target fractured well includes a plurality of hydrocarbon reservoirs, each of which has a different corresponding fracture volume, i.e., a different volume of fractures formed when fractured.
For example, the target fractured well corresponds to 3 oil and gas reservoirs, namely a first oil and gas reservoir, a second oil and gas reservoir and a third oil and gas reservoir; wherein the computer device determines that the fracture volume corresponding to the first oil and gas reservoir of the target fractured well is as shown in figure 4; wherein the abscissa is used to represent the length of the fracture formed when the first hydrocarbon reservoir is fractured and the ordinate is used to represent the width of the fracture formed when the first hydrocarbon reservoir is fractured. Determining a fracture volume corresponding to a second oil and gas reservoir of the target fractured well by the computer device as shown in figure 5; the abscissa is used for representing the length of the fracture formed when the second oil and gas reservoir is fractured, and the ordinate is used for representing the width of the fracture formed when the second oil and gas reservoir is fractured. Determining a fracturing volume corresponding to a third oil and gas reservoir of the target fracturing well by the computer device as shown in the figure 6; wherein the abscissa is used to represent the length of the fracture formed when the third hydrocarbon reservoir is fractured and the ordinate is used to represent the width of the fracture formed when the third hydrocarbon reservoir is fractured.
In one possible implementation manner, the step of determining, by the computer device, the effective seepage range parameter corresponding to the fractured well is: the computer equipment determines the maximum production pressure difference, the formation oil gas viscosity and the production time when the fracturing well is produced; determining an effective seepage range parameter corresponding to the fracturing well according to the maximum production pressure difference, the formation oil gas viscosity, the production time, the permeability parameter and the porosity parameter by the following formula IV;
the formula four is as follows:
wherein, L represents an effective seepage range parameter, K represents a permeability parameter, Δ p represents a maximum production pressure difference, t represents production time, phi represents a porosity parameter, and mu represents the viscosity of the formation oil gas.
Optionally, the computer device stores a corresponding relationship between the fracturing well identifier and the maximum production pressure difference, and between the fracturing well identifier and the formation oil and gas viscosity; correspondingly, the steps of determining the maximum production pressure difference and the formation oil gas viscosity when the fractured well is produced by the computer equipment are as follows: and the computer equipment determines the maximum production pressure difference and the formation oil gas viscosity of the fracturing well to be determined corresponding to the target fracturing well identification from the corresponding relation among the stored fracturing well identification, the maximum production pressure difference and the formation oil gas viscosity according to the target fracturing well identification of the fracturing well to be determined.
Wherein the unit of the effective seepage range parameter is m, the unit of the permeability parameter is mD, the unit of the maximum production pressure difference is Mpa, the unit of the porosity parameter is%, the unit of the formation oil gas viscosity is Mpa · s, and the unit of the production time is s.
The embodiment of the application provides a method for determining fracturing validity parameters, and the fracturing validity parameters are determined according to fracturing fracture volume and permeability recovery parameters, the maximum fracturing volume of a fracturing well in a fracturing stage and the maximum permeability parameters of the fracturing well in a fracturing flowback stage are parameters of the fracturing well during fracturing, namely, the influence of permeability change of the fracturing well is considered from two dimensions of volume and permeability, and therefore the accuracy of the determined fracturing validity parameters is improved.
Fig. 7 is a block diagram illustrating a fracture effectiveness parameter determination apparatus according to an example embodiment. Referring to fig. 7, the apparatus includes:
the obtaining module 701 is used for obtaining physical parameters of a fractured well to be determined, wherein the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fractured well;
a first determining module 702, configured to determine, according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the oil-gas saturation parameter, a fracture volume corresponding to the fracture well, where the fracture volume is used to indicate a maximum fracture volume corresponding to the fracture well in a fracture stage;
a second determining module 703, configured to determine a permeability recovery parameter corresponding to the fractured well, where the permeability recovery parameter is used to indicate a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage;
and a third determining module 704, configured to determine, according to the fracture volume and the permeability recovery parameter, a fracture effectiveness parameter corresponding to the fractured well, where the fracture effectiveness parameter is used to indicate whether the oil and gas yield after fracturing of the fractured well reaches the standard.
In a possible implementation manner, the second determining module 703 includes:
the first determining unit 7031 is configured to determine an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the oil-gas saturation parameter;
a second determining unit 7032, configured to determine a yield of the fractured oil gas of the fractured well according to the energy storage parameter;
and a third determining unit 7033, configured to determine a fracture volume of the fractured well according to the fractured oil and gas yield.
In another possible implementation manner, the first determining unit 7031 is configured to determine, according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the oil-gas saturation parameter, an energy storage parameter of the fractured well by using a first formula;
the formula I is as follows:
wherein,
representing an energy storage parameter, K a permeability parameter, H an effective thickness parameter, phi a porosity parameter, S g Representing the hydrocarbon saturation parameter.
In another possible implementation manner, the second determining unit 7032 is configured to determine, according to the energy storage parameter, a fractured oil and gas yield of the fractured well according to the following formula two;
the formula II is as follows:
wherein Q is g The method represents the yield of the fracturing oil gas,
representing an energy storage parameter.
In another possible implementation manner, the third determining unit 7033 is configured to determine, according to the yield of the fractured oil and gas, a fracture volume corresponding to the fractured well according to the following formula three;
the formula III is as follows:
wherein, V f Denotes fracture volume, Q g Representing the fracturing oil and gas yield.
In another possible implementation, the third determining module 704 is configured to determine a length of a fracture formed in the fractured well, and determine an influence width of the fracture according to the fracture volume and the length; determining effective seepage range parameters corresponding to the fracturing well; if the effective seepage range parameter is not less than the influence width and the permeability recovery parameter is not less than the preset permeability parameter, determining that the fracturing effectiveness parameter is a first parameter, wherein the first parameter is used for indicating that the oil gas yield after fracturing of the fracturing well reaches the standard; and if the effective seepage range parameter is smaller than the influence width or the permeability recovery parameter is smaller than the preset permeability parameter, determining the fracturing effectiveness parameter as a second parameter, wherein the second parameter is used for indicating that the oil gas yield after fracturing of the fracturing well does not reach the standard.
In another possible implementation, the third determining module 704 is configured to determine a maximum production pressure difference, a formation oil and gas viscosity, and a production time when the fractured well is produced; determining an effective seepage range parameter corresponding to the fracturing well according to the maximum production pressure difference, the viscosity of the oil gas in the stratum, the production time, the permeability parameter and the porosity parameter through the following formula IV;
the formula four is as follows:
wherein, L represents an effective seepage range parameter, K represents a permeability parameter, Δ p represents a maximum production pressure difference, t represents production time, phi represents a porosity parameter, and mu represents the viscosity of oil gas in a stratum.
The embodiment of the application provides a device for determining fracturing effectiveness parameters, because the fracturing effectiveness parameters are determined according to the fracturing fracture volume and the permeability recovery parameters, the maximum fracturing volume of a fracturing well corresponding to the fracturing stage and the maximum permeability parameters of the fracturing well corresponding to the fracturing flowback stage are parameters of the fracturing well during fracturing, namely, the influence of permeability change of the fracturing well is considered from two dimensions of volume and permeability, and therefore the accuracy of the determined fracturing effectiveness parameters is improved.
Fig. 9 shows a block diagram of a computer device 900 provided in an exemplary embodiment of the invention. The computer device 900 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. Computer device 900 may also be referred to by other names such as user device, portable computer device, laptop computer device, desktop computer device, and so forth.
Generally, computer device 900 includes: a processor 901 and a memory 902.
In some embodiments, computer device 900 may also optionally include: a peripheral interface 903 and at least one peripheral. The processor 901, memory 902, and peripheral interface 903 may be connected by buses or signal lines. Various peripheral devices may be connected to the peripheral interface 903 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 904, a display screen 905, a camera 906, an audio circuit 907, a positioning component 908, and a power supply 909.
The peripheral interface 903 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 901 and the memory 902. In some embodiments, the processor 901, memory 902, and peripheral interface 903 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 901, the memory 902 and the peripheral interface 903 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.
The Radio Frequency circuit 904 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 904 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 904 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 904 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 904 may communicate with other computer devices via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation 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 904 may also include NFC (Near Field Communication) related circuits, which are not limited in this application.
The display screen 905 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 905 is a touch display screen, the display screen 905 also has the ability to capture touch signals on or over the surface of the display screen 905. The touch signal may be input to the processor 901 as a control signal for processing. At this point, the display 905 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 905 may be one, providing the front panel of the computer device 900; in other embodiments, the number of the display screens 905 may be at least two, and each of the display screens may be disposed on a different surface of the computer device 900 or may be in a foldable design; in still other embodiments, the display 905 may be a flexible display, disposed on a curved surface or on a folded surface of the computer device 900. Even more, the display screen 905 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The Display panel 905 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), or other materials.
The camera assembly 906 is used to capture images or video. Optionally, camera assembly 906 includes a front camera and a rear camera. Generally, a front camera is disposed on a front panel of a computer apparatus, and a rear camera is disposed on a rear surface of the computer apparatus. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, the main camera and the wide-angle camera are fused to realize panoramic shooting and a VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, camera assembly 906 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The positioning component 908 is used to locate the current geographic Location of the computer device 900 for navigation or LBS (Location Based Service). The Positioning component 908 may be a Positioning component based on the GPS (Global Positioning System) in the united states, the beidou System in china, the graves System in russia, or the galileo System in the european union.
The power supply 909 is used to supply power to the various components in the computer device 900. The power source 909 may be ac, dc, disposable or rechargeable. When the power source 909 includes a rechargeable battery, the rechargeable battery may support wired charging or wireless charging. The rechargeable battery can also be used to support fast charge technology.
In some embodiments, computer device 900 also includes one or more sensors 910. The one or more sensors 910 include, but are not limited to: acceleration sensor 911, gyro sensor 912, pressure sensor 913, fingerprint sensor 914, optical sensor 915, and proximity sensor 916.
The acceleration sensor 911 can detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the computer apparatus 900. For example, the acceleration sensor 911 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 901 can control the display screen 905 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 911. The acceleration sensor 911 may also be used for acquisition of motion data of a game or a user.
The gyro sensor 912 may detect a body direction and a rotation angle of the computer apparatus 900, and the gyro sensor 912 may cooperate with the acceleration sensor 911 to acquire a 3D motion of the user with respect to the computer apparatus 900. The processor 901 can implement the following functions according to the data collected by the gyro sensor 912: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.
The pressure sensor 913 may be disposed on a side bezel of the computer device 900 and/or underneath the display screen 905. When the pressure sensor 913 is disposed on the side frame of the computer device 900, the holding signal of the user to the computer device 900 may be detected, and the processor 901 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 913. When the pressure sensor 913 is disposed at the lower layer of the display screen 905, the processor 901 controls the operable control on the UI interface according to the pressure operation of the user on the display screen 905. The operability control comprises at least one of a button control, a scroll bar control, an icon control, and a menu control.
The fingerprint sensor 914 is used for collecting a fingerprint of the user, and the processor 901 identifies the user according to the fingerprint collected by the fingerprint sensor 914, or the fingerprint sensor 914 identifies the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 901 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 914 may be disposed on the front, back, or side of the computer device 900. When a physical key or vendor Logo is provided on the computer device 900, the fingerprint sensor 914 may be integrated with the physical key or vendor Logo.
The optical sensor 915 is used to collect ambient light intensity. In one embodiment, the processor 901 may control the display brightness of the display screen 905 based on the ambient light intensity collected by the optical sensor 915. Specifically, when the ambient light intensity is high, the display brightness of the display screen 905 is increased; when the ambient light intensity is low, the display brightness of the display screen 905 is reduced. In another embodiment, the processor 901 can also dynamically adjust the shooting parameters of the camera assembly 906 according to the ambient light intensity collected by the optical sensor 915.
The proximity sensor 916, also known as a distance sensor, is typically disposed on a front panel of the computer device 900. The proximity sensor 916 is used to capture the distance between the user and the front of the computer device 900. In one embodiment, the processor 901 controls the display 905 to switch from the bright screen state to the dark screen state when the proximity sensor 916 detects that the distance between the user and the front face of the computer device 900 is gradually decreased; when the proximity sensor 916 detects that the distance between the user and the front of the computer device 900 becomes gradually larger, the display screen 905 is controlled by the processor 901 to switch from the breath screen state to the bright screen state.
Those skilled in the art will appreciate that the architecture illustrated in FIG. 9 does not constitute a limitation of computer device 900, and may include more or fewer components than those illustrated, or some of the components may be combined, or a different arrangement of components may be employed.
In an exemplary embodiment, a storage medium comprising program code, such as a memory comprising program code, executable by a processor of an apparatus to perform the above method is also provided. Alternatively, the storage medium may be a non-transitory computer readable storage medium, which may be, for example, a ROM (Read-Only Memory), a RAM (Random Access Memory), a CD-ROM (Compact Disc Read-Only Memory), a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method of determining a fracture effectiveness parameter, the method comprising:
obtaining physical parameters of a fracturing well to be determined, wherein the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fracturing well;
determining a fracturing volume corresponding to the fracturing well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter, wherein the fracturing volume is used for representing the maximum fracturing volume corresponding to the fracturing well in a fracturing stage;
determining a permeability recovery parameter corresponding to the fractured well according to the permeability parameter, wherein the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage;
and determining a fracturing effectiveness parameter corresponding to the fractured well according to the fracturing volume and the permeability recovery parameter, wherein the fracturing effectiveness parameter is used for indicating whether the oil and gas yield after the fracturing of the fractured well reaches the standard or not.
2. The method of claim 1, wherein determining a fracture volume corresponding to the fractured well from the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter comprises:
determining an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter;
determining the fracturing oil gas yield of the fracturing well according to the energy storage parameters;
and determining the fracture volume of the fractured well according to the fractured oil and gas yield.
3. The method of claim 2, wherein determining an energy storage parameter for the fractured well from the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter comprises:
determining an energy storage parameter of the fractured well according to the permeability parameter, the effective thickness parameter, the porosity parameter and the oil-gas saturation parameter by the following formula I;
the formula I is as follows:
wherein,
representing the energy storage parameter, K representing the permeability parameter, H representing the effective thickness parameter,
represents the porosity parameter, S g Representing the hydrocarbon saturation parameter.
4. The method of claim 2, wherein determining a fractured hydrocarbon production of the fractured well from the energy storage parameter comprises:
determining the fracturing oil gas yield of the fracturing well according to the energy storage parameters through a second formula;
the second formula is as follows:
wherein Q g Representing the production of the fractured oil and gas,
representing the energy storage parameter.
5. The method of claim 2, wherein determining a fracture volume of the fractured well from the fractured hydrocarbon production comprises:
determining the fracturing volume corresponding to the fracturing well according to the fracturing oil gas yield and the following formula III;
the formula III is as follows:
wherein, V f Represents the fracture volume, Q g Representing the fractured hydrocarbon production.
6. The method of claim 1, wherein determining a fracture effectiveness parameter corresponding to the fractured well from the fracture volume and the permeability recovery parameter comprises:
determining a length of a fracture formed in the fractured well, determining an impact width of the fracture according to the fracture volume and the length;
determining effective seepage range parameters corresponding to the fracturing well;
if the effective seepage range parameter is not smaller than the influence width and the permeability recovery parameter is not smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a first parameter, wherein the first parameter is used for indicating that the oil gas yield after the fracturing of the fracturing well reaches the standard; and if the effective seepage range parameter is smaller than the influence width or the permeability recovery parameter is smaller than a preset permeability parameter, determining that the fracturing effectiveness parameter is a second parameter, wherein the second parameter is used for indicating that the oil and gas yield after the fracturing of the fractured well does not reach the standard.
7. The method of claim 6, wherein the determining effective seepage range parameters for the fractured well comprises:
determining the maximum production pressure difference, the viscosity of stratum oil gas and the production time when the fracturing well is produced;
determining an effective seepage range parameter corresponding to the fractured well according to the maximum production pressure difference, the formation oil and gas viscosity, the production time, the permeability parameter and the porosity parameter by using a fourth formula;
the formula four is as follows:
wherein L represents the effective percolation range parameter, K represents the permeability parameter, Δ p represents the maximum production pressure difference, t represents the production time,
and the porosity parameter is represented, and mu represents the viscosity of the formation oil gas.
8. An apparatus for determining a fracture effectiveness parameter, the apparatus comprising:
the system comprises an acquisition module, a determination module and a control module, wherein the acquisition module is used for acquiring physical parameters of a fractured well to be determined, and the physical parameters comprise a permeability parameter, an effective thickness parameter, a porosity parameter and an oil-gas saturation parameter of the fractured well;
a first determining module, configured to determine, according to the permeability parameter, the effective thickness parameter, the porosity parameter, and the hydrocarbon saturation parameter, a fracture volume corresponding to the fractured well, where the fracture volume is used to represent a maximum fracture volume corresponding to the fractured well in a fracturing stage;
the second determination module is used for determining a permeability recovery parameter corresponding to the fractured well, and the permeability recovery parameter is used for representing a maximum permeability parameter corresponding to the fractured well in a fracturing flow-back stage;
and the third determination module is used for determining a fracturing effectiveness parameter corresponding to the fractured well according to the fracturing fracture volume and the permeability recovery parameter, wherein the fracturing effectiveness parameter is used for indicating whether the oil and gas yield of the fractured well after fracturing reaches the standard or not.
9. A computer device, characterized in that the computer device comprises:
a processor and a memory having stored therein at least one program code loaded and executed by the processor to implement the operations performed in the method of determining fracture effectiveness parameters of any of claims 1 to 7.
10. A computer readable storage medium having stored therein at least one program code, which is loaded and executed by a processor to implement the operations performed in the method of determining fracture effectiveness parameters according to any one of claims 1 to 7.
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