A method, device, storage medium and electronic device for determining modifiability

Abstract

An embodiment of the present invention discloses a method, device, storage medium and electronic device for determining the transformability. The method includes: determining the type and rock mechanics test parameters of a target shale oil and gas reservoir; constructing a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; and determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function. Through the technical solution provided by the embodiment of the present invention, the transformability of shale oil and gas reservoirs of various types can be accurately determined.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of geophysical exploration, and particularly to a method, device, storage medium and electronic device for determining the transformability. Background Art

[0002] As a very important alternative oil and gas resource, shale oil and gas has a huge resource volume. However, shale oil and gas must be fractured and transformed to obtain industrial production capacity. Therefore, the transformability of shale oil and gas reservoirs is an important index parameter for evaluating the quality of shale oil and gas reservoirs, and it is also one of the important bases for the design and optimization of fracturing construction plans for shale oil and gas reservoirs. The accurate prediction or determination of the transformability of shale oil and gas reservoirs is of great significance for the exploration and development of shale oil and gas. Summary of the Invention

[0003] The embodiments of the present invention provide a method, device, storage medium and electronic device for determining the transformability, which can accurately determine the transformability of various types of shale oil and gas reservoirs.

[0004] In a first aspect, the embodiments of the present invention provide a method for determining the transformability of a shale oil and gas reservoir, including:

[0005] Determine the type and rock mechanics test parameters of the target shale oil and gas reservoir;

[0006] Construct a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters;

[0007] Determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function.

[0008] In a second aspect, the embodiments of the present invention further provide a device for determining the transformability of a shale oil and gas reservoir, including:

[0009] A parameter determination module, configured to determine the type and rock mechanics test parameters of the target shale oil and gas reservoir;

[0010] A transformability function determination module, configured to construct a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters;

[0011] A transformability determination module, configured to determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function.

[0012] In a third aspect, the embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the method for determining the transformability of a shale oil and gas reservoir provided by the embodiments of the present invention.

[0013] Fourthly, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method for determining the transformability of a shale oil and gas reservoir provided by the embodiment of the present invention is implemented.

[0014] The solution for determining the transformability of a shale oil and gas reservoir provided by the embodiment of the present invention determines the type of the target shale oil and gas reservoir and the rock mechanics test parameters; constructs a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; and determines the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function. Through the technical solution provided by the embodiment of the present invention, the transformability of various types of shale oil and gas reservoirs can be accurately determined. Description of the Drawings

[0015] Figure 1 is a flowchart of a method for determining the transformability of a shale oil and gas reservoir provided by an embodiment of the present invention;

[0016] Figure 2 is a relationship curve graph of the transformability function and the brittleness index of various types of target shale oil and gas reservoirs provided by an embodiment of the present invention;

[0017] Figure 3 is a flowchart of a method for determining the transformability of a shale oil and gas reservoir provided by another embodiment of the present invention;

[0018] Figure 4 is a comparison schematic diagram of the transformability determination methods of various types of target shale oil and gas reservoirs provided by an embodiment of the present invention;

[0019] Figure 5 is a structural schematic diagram of a device for determining the transformability of a shale oil and gas reservoir provided by another embodiment of the present invention;

[0020] Figure 6 is a structural schematic diagram of an electronic device in another embodiment of the present invention. Detailed Embodiments

[0021] Embodiments of the present invention will be described in more detail below with reference to the drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0022] It should be understood that the various steps described in the method embodiments of the present invention can be executed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this regard.

[0023] As used herein, the term "comprising" and its variations are open-ended, that is, "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0024] It should be noted that the concepts such as "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.

[0025] It should be noted that the modifications of "one" and "a plurality" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0026] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0027] In the related art, the method commonly used for shale transformability evaluation is mainly the brittleness index formula proposed by American reservoir physicist gateway in 2008. This formula uses Young's modulus and Poisson's ratio to characterize the transformability of rocks and has played an important role in the development of shale oil and gas in North America. Currently, domestic shale oil and gas development directly draws on this technology and has achieved certain results in the development of marine shale gas. However, for the more widely distributed continental and transitional marine shale oil and gas reservoirs, the application effect of this technology is not ideal. Therefore, it is very necessary to invent a new technology that can accurately determine the transformability of shale oil and gas reservoirs to provide support for shale oil and gas development.

[0028] Figure 1 It is a flowchart of a method for determining the transformability of a shale oil and gas reservoir provided for an embodiment of the present invention. The embodiments of the present invention are applicable to the situation of determining the transformability of a shale oil and gas reservoir. This method can be executed by a device for determining the transformability of a shale oil and gas reservoir. This device can be composed of hardware and / or software and is generally integrated in an electronic device. As Figure 1 shown, the method specifically includes the following steps:

[0029] Step 110, determine the type of the target shale oil and gas reservoir and the rock mechanics test parameters.

[0030] Among them, the shale oil and gas reservoirs include marine shale oil and gas reservoirs, continental shale oil and gas reservoirs, and marine - continental transitional shale oil and gas reservoirs. The target shale oil and gas reservoir can be understood as the shale oil and gas reservoir to be studied by the user, or the shale oil and gas reservoir to be evaluated for transformability or used for construction plan design. In the embodiments of the present invention, determining the type of the target shale oil and gas reservoir means determining whether the target shale oil and gas reservoir is a marine shale oil and gas reservoir, a continental shale oil and gas reservoir, or a marine - continental transitional shale oil and gas reservoir. Among them, the type of the target shale oil and gas reservoir can be obtained according to the input method of the user.

[0031] In the embodiments of the present invention, determine the rock mechanics test parameters of the target shale oil and gas reservoir. Among them, the rock mechanics test parameters include one or more of the steepness of the fitting curve of the core - measured transformability and the brittleness index, the average value of the brittleness index, and the variance of the brittleness index. Optionally, determining the rock mechanics test parameters of the target shale oil and gas reservoir includes: determining the transformability and brittleness index of the core of the drilled well of the target shale oil and gas reservoir; based on the transformability and brittleness index of the core of the drilled well, drawing a relationship curve between the transformability and the brittleness index; based on the relationship curve, calculating the rock mechanics test parameters of the target shale oil and gas reservoir. Exemplarily, rock mechanics parameter tests can be performed on the cores of the known wells of the target shale oil and gas reservoir to obtain the transformability and brittleness index of multiple cores respectively. On the basis of measuring multiple cores, through curve fitting or regression techniques, based on the transformability and brittleness index of the core of the drilled well, draw a relationship curve between the transformability and the brittleness index. Among them, this relationship curve is the fitting curve of the core - measured transformability and the brittleness index, and then determine the steepness of this relationship curve. In the embodiments of the present invention, the average value and variance of the brittleness index can be determined according to the brittleness index of multiple cores obtained by testing. Optionally, the average value and variance of the brittleness index can also be determined according to the relationship curve between the transformability and the brittleness index. For example, select the brittleness index corresponding to several points from the relationship curve between the transformability and the brittleness index, and calculate the average value and variance of the brittleness index according to the selected multiple brittleness indices.

[0032] Step 120, construct a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters.

[0033] In the embodiments of the present invention, for different types of shale oil and gas reservoirs, the corresponding transformability functions are different. Exemplarily, taking the brittleness index as the independent variable, construct a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters of the target shale oil and gas reservoir.

[0034] Optionally, according to the type and the rock mechanics test parameters, a transformability function of the target shale oil and gas reservoir is constructed, including: when the type of the target shale oil and gas reservoir is a marine shale oil and gas reservoir, the transformability function of the target shale oil and gas reservoir is constructed according to the following formula: When the type of the target shale oil and gas reservoir is a transitional marine - continental shale oil and gas reservoir, the transformability function of the target shale oil and gas reservoir is constructed according to the following formula: When the type of the target shale oil and gas reservoir is a continental shale oil and gas reservoir, the transformability function of the target shale oil and gas reservoir is constructed according to the following formula: Among them, f1 represents the steepness of the fitting curve of the core - measured transformability and the brittleness index, f2 represents a preset constant, c represents the average value of the brittleness index, and σ represents the variance of the brittleness index. Optionally, f2 is the value corresponding to F(BI)=50. Among them, the larger the brittleness index of the marine shale oil and gas reservoir, the better the fracturing effect of the shale oil and gas reservoir, and the better the transformability of the shale oil and gas reservoir. Therefore, the marine shale oil and gas reservoir is a reservoir with an increasing brittleness index, that is, the transformability function of the marine shale oil and gas reservoir constructed with the brittleness index as a variable is an increasing function. For the transitional marine - continental shale oil and gas reservoir, when the brittleness index is moderate, the fracturing effect of the shale oil and gas reservoir is better, and the transformability of the shale oil and gas reservoir is better. Therefore, the transitional marine - continental shale oil and gas reservoir is a reservoir with a moderate brittleness index, that is, the transformability function of the transitional marine - continental shale oil and gas reservoir constructed with the brittleness index as a variable is an intermediate function. The smaller the brittleness index of the continental shale oil and gas reservoir, the better the fracturing effect of the shale oil and gas reservoir, and the better the transformability of the shale oil and gas reservoir. Therefore, the continental shale oil and gas reservoir is a reservoir with a decreasing brittleness index, that is, the transformability function of the continental shale oil and gas reservoir constructed with the brittleness index as a variable is a decreasing function. Exemplarily, Figure 2 FIG. is a relationship curve diagram between the transformability function of the target shale oil and gas reservoir of each type provided in an embodiment of the present invention and the brittleness index.

[0035] Step 130, determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function.

[0036] In the embodiment of the present invention, the transformability function is a function with the brittleness index as a variable. Therefore, after determining the brittleness index of each spatial point in the target shale oil and gas reservoir, based on the brittleness index and the transformability function, the transformability of each spatial point can be determined.

[0037] Optionally, before determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function, the following steps are also included: performing prestack seismic inversion on the seismic data of the block where the target shale oil and gas reservoir is located to determine the static Young's modulus and static Poisson's ratio of each spatial point in the target shale oil and gas reservoir; for each spatial point in the target shale oil and gas reservoir, calculating the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio; determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function includes: determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function and the brittleness index.

[0038] Exemplarily, based on the prestack seismic inversion technology, perform prestack seismic inversion on the seismic data of the block where the target shale oil and gas reservoir is located to determine the static Young's modulus and static Poisson's ratio of each spatial point in the target shale oil and gas reservoir. Among them, different spatial points of the target shale oil and gas reservoir respectively correspond to a static Young's modulus and a static Poisson's ratio. For each spatial point in the target shale oil and gas reservoir, calculate the brittleness index of the current spatial point based on the static Young's modulus and the static Poisson's ratio. Optionally, for each spatial point in the target shale oil and gas reservoir, calculating the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio includes: calculating the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the following formula:

[0039]

[0040]

[0041]

[0042] where E represents the static Young's modulus of the current spatial point in the target shale oil and gas reservoir, E max represents the maximum value of the static Young's modulus of all spatial points in the target shale oil and gas reservoir, E min represents the minimum value of the static Young's modulus of all spatial points in the target shale oil and gas reservoir, σ represents the static Poisson's ratio of the current spatial point in the target shale oil and gas reservoir, σ max represents the maximum value of the static Poisson's ratio of all spatial points in the target shale oil and gas reservoir, σ min represents the minimum value of the static Poisson's ratio of all spatial points in the target shale oil and gas reservoir, and BI represents the brittleness index of the current spatial point in the target shale oil and gas reservoir.

[0043] In an embodiment of the present invention, the brittleness index of each spatial point in the target shale oil and gas reservoir is substituted into the transformability function of the target shale oil and gas reservoir, and the transformability of each spatial point in the target shale oil and gas reservoir can be obtained.

[0044] The transformability determination solution for the shale oil and gas reservoir provided by the embodiment of the present invention determines the type and rock mechanics test parameters of the target shale oil and gas reservoir; constructs the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; and determines the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function. Through the technical solution provided by the embodiment of the present invention, the transformability of various types of shale oil and gas reservoirs can be accurately determined.

[0045] Figure 3 It is a flowchart of a method for determining the transformability of a shale oil and gas reservoir provided by another embodiment of the present invention. As Figure 3 shown, the method specifically includes the following steps:

[0046] Step 310, determine the type of the target shale oil and gas reservoir.

[0047] Step 320, determine the transformability and brittleness index of the cored wellbore of the target shale oil and gas reservoir.

[0048] Step 330, based on the transformability and brittleness index of the cored wellbore, draw a relationship curve between transformability and brittleness index.

[0049] Step 340, based on the relationship curve, calculate the rock mechanics test parameters of the target shale oil and gas reservoir.

[0050] Step 350, according to the type and the rock mechanics test parameters, construct the transformability function of the target shale oil and gas reservoir.

[0051] Step 360, perform prestack seismic inversion on the seismic data of the block where the target shale oil and gas reservoir is located, and determine the static Young's modulus and static Poisson's ratio of each spatial point in the target shale oil and gas reservoir.

[0052] Step 370, for each spatial point in the target shale oil and gas reservoir, calculate the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio.

[0053] Step 380, according to the transformability function and the brittleness index of each spatial point in the target shale oil and gas reservoir, determine the transformability of each spatial point in the target shale oil and gas reservoir.

[0054] Figure 4Schematic diagram for comparing the determination methods of the transformability of various types of target shale oil and gas reservoirs provided by the embodiments of the present invention. As Figure 4 shown, from left to right, it is a schematic diagram for comparing the determination methods of the transformability of marine shale oil and gas reservoirs, marine - continental transitional shale oil and gas reservoirs, and continental shale oil and gas reservoirs respectively. Obviously, whether for marine shale oil and gas reservoirs, marine - continental transitional shale oil and gas reservoirs, or continental shale oil and gas reservoirs, the accuracy of the transformability of the target shale oil and gas reservoirs determined based on the transformability function provided by the embodiments of the present invention is higher than the accuracy of the transformability of the target shale oil and gas reservoirs determined based on the brittleness index formula in the prior art.

[0055] The method for determining the transformability of shale oil and gas reservoirs provided by the embodiments of the present invention overcomes the shortcomings of the traditional technology that is only applicable to marine shale oil and gas reservoirs and has low accuracy in obtaining the transformability of marine - continental transitional and continental shale oil and gas reservoirs, greatly improves the prediction accuracy of the transformability of shale oil and gas reservoirs, and has achieved good results in the prediction of the transformability of shale oil and gas reservoirs, the evaluation of the transformability of shale oil and gas reservoirs, and the design of construction plans.

[0056] Figure 5 Schematic diagram of the structure of a device for determining the transformability of a shale oil and gas reservoir provided by another embodiment of the present invention. As Figure 5 shown, the device includes: a parameter determination module 510, a transformability function determination module 520, and a transformability determination module 530. Among them,

[0057] The parameter determination module 510 is used to determine the type of the target shale oil and gas reservoir and the rock mechanics test parameters;

[0058] The transformability function determination module 520 is used to construct the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters;

[0059] The transformability determination module 530 is used to determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function.

[0060] The device for determining the transformability of shale oil and gas reservoirs provided by the embodiments of the present invention determines the type of the target shale oil and gas reservoir and the rock mechanics test parameters; constructs the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; and determines the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function. Through the technical solution provided by the embodiments of the present invention, the transformability of various types of shale oil and gas reservoirs can be accurately determined.

[0061] Optionally, the parameter determination module is used for:

[0062] Determine the transformability and brittleness index of the drilled core of the target shale oil and gas reservoir;

[0063] Based on the transformability and brittleness index of the drilled core, draw a relationship curve between transformability and brittleness index;

[0064] Based on the relationship curve, calculate the rock mechanics test parameters of the target shale oil and gas reservoir.

[0065] Optionally, the types of the target shale oil and gas reservoir include marine shale oil and gas reservoir, continental shale oil and gas reservoir, and marine - continental transitional shale oil and gas reservoir; the rock mechanics test parameters include one or more of the steepness of the fitting curve of the measured transformability and brittleness index of the core, the average value of the brittleness index, and the variance of the brittleness index.

[0066] Optionally, the transformability function determination module is used for:

[0067] When the type of the target shale oil and gas reservoir is a marine shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula:

[0068]

[0069] When the type of the target shale oil and gas reservoir is a marine - continental transitional shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula:

[0070]

[0071] When the type of the target shale oil and gas reservoir is a continental shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula:

[0072]

[0073] Among them, f1 represents the steepness of the fitting curve of the measured transformability and brittleness index of the core, f2 represents a preset constant, c represents the average value of the brittleness index, and σ represents the variance of the brittleness index.

[0074] Optionally, the device further includes:

[0075] A prestack seismic inversion module, which is used to perform prestack seismic inversion on the seismic data of the block where the target shale oil and gas reservoir is located before determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function, and determine the static Young's modulus and static Poisson's ratio of each spatial point in the target shale oil and gas reservoir;

[0076] A brittleness index calculation module, configured to calculate the brittleness index of the current spatial point in the target shale oil and gas reservoir for each spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio;

[0077] The transformability determination module is configured to:

[0078] Determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function and the brittleness index.

[0079] Optionally, the brittleness index calculation module is configured to:

[0080] Calculate the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the following formula:

[0081]

[0082]

[0083]

[0084] where E represents the static Young's modulus of the current spatial point in the target shale oil and gas reservoir, and E max represents the maximum value of the static Young's moduli of all spatial points in the target shale oil and gas reservoir, and E min represents the minimum value of the static Young's moduli of all spatial points in the target shale oil and gas reservoir, σ represents the static Poisson's ratio of the current spatial point in the target shale oil and gas reservoir, and σ max represents the maximum value of the static Poisson's ratios of all spatial points in the target shale oil and gas reservoir, and σ min represents the minimum value of the static Poisson's ratios of all spatial points in the target shale oil and gas reservoir, and BI represents the brittleness index of the current spatial point in the target shale oil and gas reservoir.

[0085] The above device can execute the methods provided in all the foregoing embodiments of the present invention, and has corresponding functional modules and beneficial effects for executing the above methods. Technical details not described in detail in the embodiments of the present invention can be referred to the methods provided in all the foregoing embodiments of the present invention.

[0086] An embodiment of the present invention further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a method for determining the transformability of a shale oil and gas reservoir when executed by a computer processor. The method includes:

[0087] Determine the type of the target shale oil and gas reservoir and the rock mechanics test parameters;

[0088] Construct a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters;

[0089] Determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function.

[0090] Storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media such as CD-ROM, floppy disk or tape drives; computer system memory or random access memory such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory such as flash memory, magnetic media (such as hard disks or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. Additionally, the storage medium may be located in the first computer system in which the program is executed, or may be located in a different second computer system that is connected to the first computer system through a network (such as the Internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (e.g., in different computer systems connected by a network). The storage medium may store program instructions (e.g., specifically implemented as a computer program) executable by one or more processors.

[0091] Certainly, the storage medium containing computer-executable instructions provided by the embodiments of the present invention is not limited to the operation of determining the transformability of the shale oil and gas reservoir as described above, and may also execute related operations in the method for determining the transformability of the shale oil and gas reservoir provided by any embodiment of the present invention.

[0092] The embodiments of the present invention provide an electronic device, and the transformability determination device for the shale oil and gas reservoir provided by the embodiments of the present invention can be integrated in the electronic device. Figure 6 It is a structural block diagram of an electronic device provided by the embodiments of the present invention. The electronic device 600 may include: a memory 601, a processor 602, and a computer program stored on the memory 601 and executable on the processor. When the processor 602 executes the computer program, it implements the method for determining the transformability of the shale oil and gas reservoir as described in the embodiments of the present invention.

[0093] In the electronic device provided by the embodiments of the present invention, determine the type of the target shale oil and gas reservoir and the rock mechanics test parameters; construct the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function. Through the technical solution provided by the embodiments of the present invention, the transformability of various types of shale oil and gas reservoirs can be accurately determined.

[0094] The device for determining the transformability of shale oil and gas reservoirs, the storage medium, and the electronic device provided in the above embodiments can execute the method for determining the transformability of shale oil and gas reservoirs provided in any embodiment of the present invention, and have the corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in the above embodiments, reference can be made to the method for determining the transformability of shale oil and gas reservoirs provided in any embodiment of the present invention.

[0095] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for determining transformability, characterized in that, Including: Determine the type of the target shale oil and gas reservoir and the rock mechanics test parameters; wherein, the types of the target shale oil and gas reservoir include marine shale oil and gas reservoir, continental shale oil and gas reservoir, and marine - continental transitional shale oil and gas reservoir; the rock mechanics test parameters include one or more of the steepness of the fitting curve of core - measured transformability and brittleness index, the average value of the brittleness index, and the variance of the brittleness index; Construct the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; Determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function; Among them, determining the rock mechanics test parameters of the target shale oil and gas reservoir includes: Determine the transformability and brittleness index of the core of the drilled well in the target shale oil and gas reservoir; Based on the transformability and brittleness index of the core of the drilled well, draw the relationship curve between transformability and brittleness index; Based on the relationship curve, calculate the rock mechanics test parameters of the target shale oil and gas reservoir; Among them, constructing the transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters includes: When the type of the target shale oil and gas reservoir is a marine shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula: When the type of the target shale oil and gas reservoir is a marine - continental transitional shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula: When the type of the target shale oil and gas reservoir is a continental shale oil and gas reservoir, construct the transformability function of the target shale oil and gas reservoir according to the following formula: Among them, f1 represents the steepness of the fitting curve of core - measured transformability and brittleness index, f2 represents a preset constant, c represents the average value of the brittleness index, σ represents the variance of the brittleness index, and BI represents the brittleness index.

2. The method according to claim 1, wherein Before determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function, it further includes: Perform prestack seismic inversion on the seismic data of the block where the target shale oil and gas reservoir is located to determine the static Young's modulus and static Poisson's ratio of each spatial point in the target shale oil and gas reservoir; For each spatial point in the target shale oil and gas reservoir, calculate the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio; Determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function includes: Determine the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function and the brittleness index.

3. The method according to claim 2, characterized in that, For each spatial point in the target shale oil and gas reservoir, calculating the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the static Young's modulus and the static Poisson's ratio includes: Calculate the brittleness index of the current spatial point in the target shale oil and gas reservoir according to the following formula: Among them, E represents the static Young's modulus of the current spatial point in the target shale oil and gas reservoir, and E max represents the maximum value of the static Young's modulus of all spatial points in the target shale oil and gas reservoir, and E min represents the minimum value of the static Young's modulus of all spatial points in the target shale oil and gas reservoir. σ represents the static Poisson's ratio of the current spatial point in the target shale oil and gas reservoir, and σ max represents the maximum value of the static Poisson's ratio of all spatial points in the target shale oil and gas reservoir, and σ min represents the minimum value of the static Poisson's ratio of all spatial points in the target shale oil and gas reservoir. BI represents the brittleness index of the current spatial point in the target shale oil and gas reservoir.

4. An apparatus for determining the transformability of a shale oil and gas reservoir, characterized in that, Including: A parameter determination module for determining the type of the target shale oil and gas reservoir and the rock mechanics test parameters; wherein, the types of the target shale oil and gas reservoir include marine shale oil and gas reservoirs, continental shale oil and gas reservoirs, and marine - continental transitional shale oil and gas reservoirs; the rock mechanics test parameters include one or more of the steepness of the fitting curve of the core - measured transformability and brittleness index, the average value of the brittleness index, and the variance of the brittleness index; A transformability function determination module for constructing a transformability function of the target shale oil and gas reservoir according to the type and the rock mechanics test parameters; A transformability determination module for determining the transformability of each spatial point in the target shale oil and gas reservoir according to the transformability function; Among them, the parameter determination module is used for: Determining the transformability and brittleness index of the cored wells of the target shale oil and gas reservoir; Based on the transformability and brittleness index of the cored wells, drawing a relationship curve between transformability and brittleness index; Based on the relationship curve, calculating the rock mechanics test parameters of the target shale oil and gas reservoir; Among them, the transformability function determination module is used for: When the type of the target shale oil and gas reservoir is a marine shale oil and gas reservoir, constructing the transformability function of the target shale oil and gas reservoir according to the following formula: When the type of the target shale oil and gas reservoir is a marine - continental transitional shale oil and gas reservoir, constructing the transformability function of the target shale oil and gas reservoir according to the following formula: When the type of the target shale oil and gas reservoir is a continental shale oil and gas reservoir, constructing the transformability function of the target shale oil and gas reservoir according to the following formula: Among them, f1 represents the steepness of the fitting curve of the core - measured transformability and brittleness index, f2 represents a preset constant, c represents the average value of the brittleness index, σ represents the variance of the brittleness index, and BI represents the brittleness index.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processing device, it implements the method for determining the transformability of a shale oil and gas reservoir as described in any one of claims 1 - 3.

6. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. It is characterized in that when the processor executes the computer program, it implements the method for determining the transformability of a shale oil and gas reservoir as described in any one of claims 1 - 3.

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