Shale Helium Permeability Correction Method, Device, Electronic Device and Storage Medium

Abstract

The present application provides a method, apparatus, electronic device, and storage medium for correcting the helium permeability of shale; relating to the technical field of correcting the helium permeability of shale, the method includes: performing a mercury intrusion test on a first shale to obtain mercury intrusion test data of the first shale; there are no cracks in the structure of the first shale; the mercury intrusion test data at least includes mercury intrusion pressure data and pore throat distribution data; based on the mercury intrusion test data, determining the theoretical matrix permeability of the first shale; obtaining the helium permeability of the first shale; based on the theoretical matrix permeability and the helium permeability, determining a helium permeability correction model; and correcting the helium permeability of a target shale to be corrected based on the helium permeability correction model. In this way, a quantitative relationship between the shale matrix permeability and the helium permeability of the intact shale can be established, the influence of cracks generated during the shale pretreatment process on the helium permeability test can be eliminated, and the helium permeability characterizing the shale permeability can be accurately obtained.

Description

Technical Field

[0001] The present application relates to the technical field of shale helium permeability correction, and particularly to a shale helium permeability correction method, device, electronic device and storage medium. Background Art

[0002] Shale oil reservoirs are rich in various fluids. In order to eliminate the influence of these stored fluids on the helium permeability test, oil washing and drying treatments are usually required. However, these treatment processes often cause the shale samples to break and generate secondary fractures, resulting in a serious overestimation of the measured helium permeability, and thus it is impossible to accurately evaluate the permeability of shale. Although the current anhydrous wire cutting technology can ensure the integrity of the drilled shale samples to a certain extent, the current methods still cannot completely eliminate the secondary fractures generated during oil washing, drying and other processes. The existence of these fractures seriously affects the accuracy of the helium permeability test, resulting in a large deviation between the test results and the actual permeability of the shale reservoir. Summary of the Invention

[0003] Embodiments of the present application provide a shale helium permeability correction method, device, electronic device and storage medium to solve one or more problems existing in the related art.

[0004] According to a first aspect of the present application, there is provided a shale helium permeability correction method, including: performing a mercury intrusion test on a first shale to obtain mercury intrusion test data of the first shale; there are no fractures in the structure of the first shale; the mercury intrusion test data includes at least mercury intrusion pressure data and pore throat distribution data; determining a theoretical matrix permeability of the first shale based on the mercury intrusion test data; obtaining a helium permeability of the first shale; determining a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; and correcting the helium permeability of a target shale to be corrected based on the helium permeability correction model.

[0005] According to an embodiment of the present invention, the performing a mercury intrusion test on a first shale to obtain mercury intrusion test data of the first shale includes: performing a mercury intrusion test on the first shale based on set test parameters to obtain mercury intrusion pressure data and pore throat distribution data corresponding to the first shale; the mercury intrusion pressure data represents the relationship between the pressure required for mercury to enter the pore throats of the first shale and the pore throat size; and the pore throat distribution data represents the size distribution of the pore throats inside the first shale.

[0006] According to an embodiment of the present invention, determining the theoretical matrix permeability of the first shale based on the mercury intrusion test data includes: determining the pore throat diameter of the first shale under the condition of maximum hydraulic conductivity based on the mercury intrusion pressure data and the pore throat distribution data; determining the critical pore throat diameter based on the mercury intrusion pressure data and the pore throat distribution data; and determining the theoretical matrix permeability based on the pore throat diameter under the condition of maximum hydraulic conductivity and the critical pore throat diameter.

[0007] According to an embodiment of the present invention, determining the theoretical matrix permeability based on the pore throat diameter under the condition of maximum hydraulic conductivity and the critical pore throat diameter includes: calculating the theoretical matrix permeability based on the following formula: Where, is the theoretical matrix permeability, is the critical pore throat diameter, is the pore throat diameter under the condition of maximum hydraulic conductivity, is the helium porosity of the first shale, is the mercury saturation corresponding to the pore throat diameter under the condition of maximum hydraulic conductivity.

[0008] According to an embodiment of the present invention, determining the helium permeability correction model based on the theoretical matrix permeability and the helium permeability includes: representing the helium permeability correction model based on the following formula: Representing the helium permeability correction model based on the following formula: Where, K b is the helium permeability, is the theoretical matrix permeability, and m and n are fitting coefficients; the helium permeability correction model characterizes that the theoretical matrix permeability and the helium permeability are positively correlated.

[0009] According to an embodiment of the present invention, correcting the helium permeability of the target shale to be corrected based on the helium permeability correction model includes: performing a mercury intrusion test on the target shale to be corrected to determine the target matrix permeability of the target shale to be corrected; calculating through the helium permeability correction model based on the target matrix permeability to obtain the target helium permeability; the target helium permeability characterizes the helium permeability of the target shale to be corrected after correction.

[0010] According to an embodiment of the present invention, obtaining the helium permeability of the first shale includes: performing an oil washing treatment on the first shale to obtain the first shale after the oil washing treatment; performing a drying treatment on the first shale after the oil washing treatment to obtain the first shale after the drying treatment; and testing the first shale after the drying treatment based on a set confining pressure pore permeability instrument to obtain the helium permeability of the first shale.

[0011] According to a second aspect of the present application, there is provided a shale helium permeability correction device, including: a testing module for performing mercury intrusion testing on a first shale to obtain mercury intrusion test data of the first shale; there are no cracks in the structure of the first shale; the mercury intrusion test data at least includes mercury intrusion pressure data and pore throat distribution data; a determination module for determining the theoretical matrix permeability of the first shale based on the mercury intrusion test data; an acquisition module for acquiring the helium permeability of the first shale; a construction module for determining a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; a correction module for correcting the helium permeability of a target shale to be corrected based on the helium permeability correction model.

[0012] According to a third aspect of the present application, there is provided an electronic device, including:

[0013] At least one processor; and

[0014] A memory communicatively connected to the at least one processor; wherein,

[0015] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the present application.

[0016] According to a fourth aspect of the present application, there is provided a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the method described in the present application.

[0017] The method of the embodiments of the present application performs mercury intrusion testing on a first shale to obtain mercury intrusion test data of the first shale; there are no cracks in the structure of the first shale; the mercury intrusion test data at least includes mercury intrusion pressure data and pore throat distribution data; determines the theoretical matrix permeability of the first shale based on the mercury intrusion test data; acquires the helium permeability of the first shale; determines a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; corrects the helium permeability of a target shale to be corrected based on the helium permeability correction model. In this way, a quantitative relationship between the shale matrix permeability and the helium permeability of the intact shale is established, the influence of cracks generated during the shale pretreatment process on the helium permeability test can be eliminated, and the helium permeability characterizing the shale permeability can be accurately obtained.

[0018] It should be understood that the teachings of the present application do not need to achieve all the beneficial effects described above. Instead, specific technical solutions can achieve specific technical effects, and other embodiments of the present application can also achieve beneficial effects not mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become readily understandable. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, wherein:

[0020] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0021] Figure 1 It shows a schematic processing flow of the shale helium permeability correction method provided by an embodiment of the present application; Figure 1 ;

[0022] Figure 2 It shows a schematic processing flow of the shale helium permeability correction method provided by an embodiment of the present application; Figure 2 ;

[0023] Figure 3 It shows a schematic processing flow of the shale helium permeability correction method provided by an embodiment of the present application; Figure 3 ;

[0024] Figure 4 It shows a schematic processing flow of the shale helium permeability correction method provided by an embodiment of the present application; Figure 4 ;

[0025] Figure 5 It shows an application scenario of the shale helium permeability correction method provided by an embodiment of the present application; Figure 1 ;

[0026] Figure 6 It shows an application scenario of the shale helium permeability correction method provided by an embodiment of the present application; Figure 2 ;

[0027] Figure 7 It shows an application scenario of the shale helium permeability correction method provided by an embodiment of the present application; Figure 3 ;

[0028] Figure 8 It shows an application scenario of the shale helium permeability correction method provided by an embodiment of the present application; Figure 4 ;

[0029] Figure 9 It shows an optional schematic diagram of the shale helium permeability correction device provided by an embodiment of the present application;

[0030] Figure 10 It shows a schematic diagram of the composition structure of the electronic device provided by an embodiment of the present application. Detailed implementation manners

[0031] To make the objectives, features, and advantages of the present application more apparent and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0032] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0033] In the following description, the terms "first / second" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second" can be interchanged in a specific order or sequence when allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0035] The processing flow in the shale helium permeability correction method provided by the embodiments of the present application will be described. Refer to Figure 1 , Figure 1 which is a schematic diagram of the processing flow of the shale helium permeability correction method provided by the embodiments of the present application Figure 1 , and will be described in conjunction with Figure 1 the steps S101 - S105 shown.

[0036] Step S101, perform a mercury intrusion test on the first shale to obtain the mercury intrusion test data of the first shale; there are no cracks in the structure of the first shale; the mercury intrusion test data includes at least mercury intrusion pressure data and pore throat distribution data.

[0037] In some embodiments, the first shale may include: a standard shale plug sample obtained by wire cutting without water. The diameter of the first shale may be 25 mm, and the length of the first shale may be 30 mm. There are no cracks in the structure of the first shale. The mercury intrusion test may include: performing a high-pressure mercury intrusion test through an AutoPore Ⅳ 9505 pore analyzer. Specifically, the high-pressure mercury intrusion test may be carried out with reference to the provisions of GB / T 21650.1-2008. The maximum mercury intrusion pressure of the mercury intrusion test is 200 MPa. The mercury intrusion test data may include: the mercury intrusion-extrusion curve and pore throat distribution data of the first shale. The mercury intrusion test data may also include other data of the first shale, which are not limited in the embodiments of the present application.

[0038] Step S102, based on the mercury intrusion test data, determine the theoretical matrix permeability of the first shale.

[0039] In some embodiments, first, according to the mercury intrusion curve segment data and pore throat distribution data in the mercury intrusion-extrusion curve of the high-pressure mercury intrusion test of the first shale, calculate the theoretical matrix permeability of the first shale. Specifically, the theoretical matrix permeability of the first shale can be quantitatively calculated by applying the Katz and Thompson (KT) method based on the mercury intrusion curve segment data. The theoretical matrix permeability can be used to characterize the permeability of the first shale in the absence of cracks.

[0040] Step S103, obtain the helium permeability of the first shale.

[0041] Step S104, based on the theoretical matrix permeability and helium permeability, determine the helium permeability correction model.

[0042] In some embodiments, the first shale obtained by wire cutting without water is subjected to oil washing treatment to obtain the first shale after oil washing treatment. The helium porosity and permeability test of the first shale after oil washing treatment can obtain the helium permeability of the first shale. Specifically, the helium porosity and permeability test can be carried out with reference to the provisions of GB_T 34533-2023. The helium permeability can be used to represent the permeability of the first shale under the condition of helium flow. The helium permeability correction model can be a functional relationship between the theoretical matrix permeability and helium permeability.

[0043] Step S105, based on the helium permeability correction model, correct the helium permeability of the target shale to be corrected.

[0044] In some embodiments, for the target shale to be corrected, first conduct a mercury intrusion test to obtain the mercury intrusion test data of the target shale to be corrected, then calculate the theoretical matrix permeability of the target shale to be corrected based on the mercury intrusion test data, and then substitute the theoretical matrix permeability into the established helium permeability correction model to calculate the corrected helium permeability. The corrected helium permeability can represent the permeability of the target shale to be corrected under the condition of helium flow. The target shale to be corrected may include a complete shale sample. The target shale to be corrected may also include an incomplete shale sample. The embodiments of the present application do not limit the specific target shale to be corrected.

[0045] The method of the embodiments of the present application obtains the mercury intrusion pressure and pore throat distribution data of the fracture-free shale through a high-pressure mercury intrusion test, calculates the theoretical matrix permeability, and establishes a correction model in combination with the helium permeability, thereby establishing a quantitative relationship between the shale matrix permeability and the helium permeability of the complete shale, which can eliminate the influence of the fractures generated during the shale pretreatment process on the helium permeability test and accurately obtain the helium permeability characterizing the shale permeability.

[0046] In some embodiments, step S101 may include: conducting a mercury intrusion test on the first shale based on the set test parameters to obtain the mercury intrusion pressure data and pore throat distribution data corresponding to the first shale. Among them, the mercury intrusion pressure data characterizes the relationship between the pressure required for mercury to enter the pore throats of the first shale and the pore throat size. The pore throat distribution data characterizes the size distribution of the pore throats inside the first shale.

[0047] In this embodiment, the test parameters may include: parameters preset according to the characteristics of the first shale and the test requirements. Specifically, the test parameters may include: parameters such as the test pressure range, pressure increment interval, and test temperature, which will affect the results of the mercury intrusion test. The specific test parameters can be set with reference to the provisions of GB / T 21650.1-2008. The mercury intrusion pressure data may include: the mercury intrusion pressure magnitudes corresponding to different pore throat sizes. The pore throat distribution data may include data such as the number and volume ratio of pore throats of different sizes.

[0048] In some embodiments, the processing flow diagram of the shale helium permeability correction method Figure 2 , as Figure 2 shown, determining the theoretical matrix permeability of the first shale based on the mercury intrusion test data in step S102 may include:

[0049] Step S201, based on the mercury intrusion pressure data and the pore throat distribution data, determine the pore throat diameter of the first shale under the condition of the maximum hydraulic conductivity.

[0050] In this embodiment, based on the mercury intrusion pressure data and the pore throat distribution data, the correlation between the pore volume × the cube of the pore diameter and the pore throat diameter of the first shale is determined. The correlation can specifically be a curve of the pore volume × the cube of the pore diameter and the pore throat diameter. The pore throat diameter of the first shale under the condition of the maximum hydraulic conductivity may include: the pore throat diameter corresponding to the maximum value of the curve.

[0051] Step S202: Based on the mercury intrusion pressure data and the pore throat distribution data, determine the critical pore throat diameter.

[0052] In this embodiment, based on the mercury intrusion pressure data and the pore throat distribution data, the correlation between the cumulative pore volume of the first shale and the mercury intrusion pressure is determined. The correlation can specifically be a curve of the cumulative pore volume and the mercury intrusion pressure. Based on the curve, determine the cumulative pore volume corresponding to the mercury intrusion pressure being the critical pressure (Pc). Based on the determined cumulative pore volume, determine the corresponding pore throat diameter. The critical pore throat diameter may include: the pore throat diameter corresponding to the case where the mercury intrusion pressure is the critical pressure.

[0053] Step S203: Based on the pore throat diameter under the condition of the maximum hydraulic conductivity and the critical pore throat diameter, determine the theoretical matrix permeability.

[0054] In this embodiment, step S203 can be represented by the following formula (1).

[0055] (1)

[0056] Wherein, is the theoretical matrix permeability, is the critical pore throat diameter, is the pore throat diameter under the condition of the maximum hydraulic conductivity, is the helium porosity of the first shale, is the mercury saturation corresponding to the pore throat diameter under the condition of the maximum hydraulic conductivity. 1 / 89 is a constant factor and is an empirical constant. The pore throat diameter under the condition of the maximum hydraulic conductivity is less than or equal to the critical pore throat diameter.

[0057] The method of the embodiment of the present application obtains the mercury intrusion pressure and the pore throat distribution data of the fracture-free shale through high-pressure mercury intrusion testing, calculates the theoretical matrix permeability, and combines with the helium permeability to establish a correction model, establishing a quantitative relationship between the shale matrix permeability and the helium permeability of the intact shale, which can eliminate the influence of the fractures generated during the shale pretreatment process on the helium permeability test and accurately obtain the helium permeability characterizing the shale permeability.

[0058] In some embodiments, the helium permeability correction model in step S104 can be represented by the following formula (2).

[0059] (2)

[0060] Among them, K b is the helium permeability, is the theoretical matrix permeability, and m and n are fitting coefficients, dimensionless. The helium permeability correction model can indicate that the theoretical matrix permeability and the helium permeability are positively correlated.

[0061] In some embodiments, the processing flow of the shale helium permeability correction method is schematically Figure 3 , as Figure 3 shown. Based on the helium permeability correction model in step S105, correcting the helium permeability of the target shale to be corrected may specifically include:

[0062] Step S301, performing a mercury intrusion test on the target shale to be corrected to determine the target matrix permeability of the target shale to be corrected.

[0063] Step S302, based on the target matrix permeability, calculate through the helium permeability correction model to obtain the target helium permeability.

[0064] As an example, perform a high-pressure mercury intrusion experiment on the target shale to be corrected. Place the shale sample in a high-pressure mercury intrusion instrument, record data such as the mercury intrusion volume and the corresponding pore throat diameter at different pressures, and obtain information such as the mercury intrusion - mercury extrusion curve and the pore throat distribution data of the target shale to be corrected. According to the mercury intrusion - mercury extrusion curve and the pore throat distribution data obtained from the experiment, use formula (1) to calculate the target matrix permeability of the target shale to be corrected. Among them, is the pore throat diameter corresponding to the maximum value of the curve of pore volume × pore diameter³ and pore throat diameter, that is, the optimal seepage pore diameter, is the pore throat diameter corresponding to the critical pressure of the curve of cumulative pore volume and mercury intrusion pressure, and ≤ . Substitute the target matrix permeability into the established helium permeability correction model, and calculate the corrected helium permeability, that is, the target helium permeability, through formula (2). The target helium permeability can represent the helium permeability of the corrected target shale to be corrected, and the target helium permeability excludes the influence of the cracks generated during the pretreatment process of the target shale to be corrected on the helium permeability.

[0065] The method of the embodiment of the present application obtains the mercury intrusion pressure and pore throat distribution data of the fracture-free shale through high-pressure mercury intrusion testing, calculates the theoretical matrix permeability, and combines the helium permeability to establish a correction model, establishing a quantitative relationship between the shale matrix permeability and the helium permeability of the intact shale, which can eliminate the influence of the cracks generated during the shale pretreatment process on the helium permeability test, and accurately obtain the helium permeability characterizing the shale permeability.

[0066] In some embodiments, the processing flow of the shale helium permeability correction method is shown as follows: Figure 4 ,like Figure 4 As shown, obtaining the helium permeability of the first shale in step S103 may specifically include:

[0067] Step S401, performing oil washing treatment on the first shale to obtain the first shale after the oil washing treatment.

[0068] Step S402, drying the first shale after the oil washing treatment to obtain the dried first shale.

[0069] Step S403: testing the first shale after the drying process based on the set overburden porosimeter to obtain the helium permeability of the first shale.

[0070] In some embodiments, the oil washing treatment may include: washing the first shale to remove the oil therein. Specifically, the first shale is usually soaked or rinsed with a set organic solvent to dissolve and remove the oil in the first shale. The drying treatment may include: drying the first shale after the oil washing treatment to remove the moisture and residual oil washing solution in the first shale. The overburden porosimeter is an instrument that can be used to measure the gas permeability of rocks under certain pressure conditions. Specifically, an overburden pressure is applied to the first shale through the overburden porosimeter to make helium flow in the first shale, thereby measuring the helium permeability of the first shale.

[0071] As an example, 45 cores were collected from the A-4 section of the Erren Nur Sag in the Erlian Basin, and then the 45 cores were washed with oil using a mixed solution of dichloromethane and acetone (volume ratio 3:1) at 0.2MPa and 80°C for 7 days, and then taken out and vacuum dried at 110°C for 24 hours to obtain the first shale that was washed with oil. Then, the overburden porosimeter was used to test the helium porosity and helium permeability of the first shale.

[0072] The method of the embodiment of the present application obtains the mercury injection pressure and pore throat distribution data of the unfractured shale through high-pressure mercury injection testing, calculates the theoretical matrix permeability, and establishes a correction model in combination with the helium permeability, thereby establishing a quantitative relationship between the shale matrix permeability and the helium permeability of the intact shale. The method can eliminate the influence of the cracks generated during the shale pretreatment process on the helium permeability test, and accurately obtain the helium permeability that characterizes the permeability of the shale.

[0073] refer to Figure 5 , application scenarios of the shale helium permeability correction method provided in the embodiment of the present application Figure 1 , which is applied in the process of determining the critical pore throat diameter.

[0074] Figure 5Among them, the horizontal axis represents the mercury intrusion pressure, with the unit of MPa; the vertical axis represents the cumulative pore volume, with the unit of cm 3 / g. As the mercury intrusion pressure increases, the cumulative pore volume gradually increases. When the mercury intrusion pressure reaches the critical pressure P c , the corresponding pore throat diameter is the critical pore throat diameter.

[0075] Reference Figure 6 , the application scenario of the shale helium permeability correction method provided by the embodiment of the present application Figure 2 , is applied to the process of determining the pore throat diameter of shale under the condition of maximum hydraulic conductivity.

[0076] The horizontal axis represents the pore throat diameter, with the unit of μm, and the vertical axis represents the cumulative pore volume × pore diameter³, with the unit of 10 -9 cm 3 .μm 3 . The pore throat diameter corresponding to the maximum point on the curve is the pore throat diameter of shale under the condition of maximum hydraulic conductivity, that is, the optimal seepage pore diameter.

[0077] Reference Figure 7 , an application scenario of the shale helium permeability correction method provided by the embodiment of the present application Figure 3 , is applied to determine the helium permeability correction model.

[0078] The helium permeability correction model can represent the correlation between the matrix permeability of shale and the measured helium permeability. The calculated matrix permeability in the horizontal axis represents the calculated theoretical matrix permeability, with the unit of 10 -9 μm 2 ; the vertical axis represents the measured helium permeability, with the unit of 10 -3 μm 2 . Figure 7 The data points in it show an obvious positive correlation, indicating that there is a linear relationship between the theoretical matrix permeability of the intact shale sample without fractures and the measured helium permeability. Among them, the linear relationship can be represented by y = 955.2x 0.595 , by fitting these data points, the helium permeability correction model can be obtained, and the goodness of fit of the helium permeability correction model can be represented by R 2 , where R 2 = 0.9158.

[0079] Reference Figure 8 , an application scenario of the shale helium permeability correction method provided by the embodiment of the present application Figure 4 , is applied to correct the helium permeability of the target shale to be corrected through the helium permeability correction model.

[0080] The horizontal axis represents the average pore throat radius, with the unit of μm; the vertical axis represents the helium permeability before and after correction, with the unit of 10-3 μm 2 。 Figure 8 Among them, before calibration, due to the existence of fractures in the shale to be calibrated, its pore throat radius is small but the measured permeability is large, and the data points are relatively scattered. After calibration, the obtained calibrated permeability has an excellent positive correlation with the average pore throat radius, and the data points are closely distributed on a straight line, indicating that the calibrated helium permeability can more accurately reflect the original pore structure of the shale.

[0081] Next, continue to describe the exemplary structure of the software module included in the shale helium permeability calibration device 90 provided by the embodiments of the present application. In some embodiments, as Figure 9 shown, the shale helium permeability calibration device 90 may include:

[0082] A test module 901, configured to perform a mercury intrusion test on the first shale to obtain mercury intrusion test data of the first shale; there are no fractures in the structure of the first shale; the mercury intrusion test data includes at least mercury intrusion pressure data and pore throat distribution data;

[0083] A determination module 902, configured to determine the theoretical matrix permeability of the first shale based on the mercury intrusion test data;

[0084] An acquisition module 903, configured to acquire the helium permeability of the first shale;

[0085] A construction module 904, configured to determine a helium permeability calibration model based on the theoretical matrix permeability and the helium permeability;

[0086] A calibration module 905, configured to calibrate the helium permeability of the shale to be calibrated based on the helium permeability calibration model.

[0087] In some embodiments, the test module 901 is configured to: perform a mercury intrusion test on the first shale based on set test parameters to obtain the mercury intrusion pressure data and pore throat distribution data corresponding to the first shale; the mercury intrusion pressure data characterizes the relationship between the pressure required for mercury to enter the pore throats of the first shale and the pore throat size; the pore throat distribution data characterizes the size distribution of the pore throats inside the first shale.

[0088] In some embodiments, the determination module 902 is configured to: determine the pore throat diameter of the first shale under the condition of maximum hydraulic conductivity based on the mercury intrusion pressure data and the pore throat distribution data; determine the critical pore throat diameter based on the mercury intrusion pressure data and the pore throat distribution data; determine the theoretical matrix permeability based on the pore throat diameter under the condition of maximum hydraulic conductivity and the critical pore throat diameter.

[0089] In some embodiments, the determination module 902 may be configured to: calculate the theoretical matrix permeability based on the following formula: Wherein, is the theoretical matrix permeability, is the critical pore throat diameter, is the pore throat diameter under the condition of the maximum hydraulic conductivity, is the helium porosity of the first shale, is the mercury saturation corresponding to the pore throat diameter under the condition of the maximum hydraulic conductivity.

[0090] In some embodiments, the building block 904 can be used to represent a helium permeability correction model based on the following formula: where, K b is the helium permeability, is the theoretical matrix permeability, and m and n are fitting coefficients; the helium permeability correction model characterizes that the theoretical matrix permeability and the helium permeability are positively correlated.

[0091] In some embodiments, the correction module 905 can be used to perform a mercury injection test on the target shale to be corrected to determine the target matrix permeability of the target shale to be corrected; calculate the target helium permeability based on the target matrix permeability through the helium permeability correction model; the target helium permeability characterizes the helium permeability of the corrected target shale to be corrected.

[0092] In some embodiments, the acquisition module 903 can be used to perform an oil washing treatment on the first shale to obtain the first shale after the oil washing treatment; perform a drying treatment on the first shale after the oil washing treatment to obtain the first shale after the drying treatment; test the first shale after the drying treatment based on a set confining pressure pore permeability instrument to obtain the helium permeability of the first shale.

[0093] It should be noted that the description of the device in the embodiments of the present application is similar to the description of the above method embodiments and has similar beneficial effects as the method embodiments, so details will not be repeated. For the technical details not described in the shale helium permeability correction device provided in the embodiments of the present application, they can be understood according to Figures 1 to 8 the description of any one of the accompanying drawings.

[0094] According to the embodiments of the present application, the present application also provides an electronic device and a non-transitory computer-readable storage medium.

[0095] Figure 10FIG. shows a schematic block diagram of an exemplary electronic device 800 that may be used to implement an embodiment of the present application. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely exemplary and are not intended to limit the implementation of the present application described and / or claimed herein.

[0096] As Figure 10 shown, the electronic device 800 includes a computing unit 801 that can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 802 or a computer program loaded from a storage unit 808 into a random access memory (RAM) 803. In the RAM 803, various programs and data required for the operation of the electronic device 800 can also be stored. The computing unit 801, the ROM 802, and the RAM 803 are connected to each other via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0097] A plurality of components in the electronic device 800 are connected to the I / O interface 805, including: an input unit 806, such as a keyboard, a mouse, etc.; an output unit 807, such as various types of displays, speakers, etc.; a storage unit 808, such as a magnetic disk, an optical disk, etc.; and a communication unit 809, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 809 allows the electronic device 800 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0098] The computing unit 801 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 801 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 801 executes the various methods and processes described above, such as the shale helium permeability correction method. For example, in some embodiments, the shale helium permeability correction method can be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 808. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 800 via the ROM 802 and / or the communication unit 809. When the computer program is loaded into the RAM 803 and executed by the computing unit 801, one or more steps of the shale helium permeability correction method described above can be executed. Alternatively, in other embodiments, the computing unit 801 can be configured to execute the shale helium permeability correction method by any other suitable means (e.g., by means of firmware).

[0099] The various embodiments of the systems and techniques described above in this document can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGA), application-specific integrated circuits (ASIC), application-specific standard products (ASSP), system-on-a-chip systems (SOC), complex programmable logic devices (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special or general programmable processor, and can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0100] The program code for implementing the methods of the present application can be written in any combination of one or more programming languages. These program codes can be provided to the processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing devices, such that when the program codes are executed by the processor or controller, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The program codes can be executed entirely on the machine, partially on the machine, as an independent software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0101] In the context of this application, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0102] To provide for interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can also be used to provide for interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic, speech, or tactile input).

[0103] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of a communication network include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0104] A computer system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, a server of a distributed system, or a server incorporating a blockchain.

[0105] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in this application can be achieved, and no limitations are imposed herein.

[0106] As described above, this is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A shale helium permeability correction method, characterized in that: include: Performing a mercury injection test on the first shale to obtain mercury injection test data of the first shale; There are no cracks in the structure of the first shale; the mercury injection test data at least includes mercury injection pressure data and pore throat distribution data; Determining the theoretical matrix permeability of the first shale based on the mercury injection test data; obtaining the helium permeability of the first shale; Determining a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; Based on the helium permeability correction model, correcting the helium permeability of the target shale to be corrected; The determining of the theoretical matrix permeability of the first shale based on the mercury injection test data comprises: determining the pore throat diameter of the first shale under the condition of maximum hydraulic conductivity based on the mercury injection pressure data and the pore throat distribution data; determining the critical pore throat diameter based on the mercury injection pressure data and the pore throat distribution data; determining the theoretical matrix permeability based on the pore throat diameter under the condition of maximum hydraulic conductivity and the critical pore throat diameter; The determining the theoretical matrix permeability based on the pore throat diameter and the critical pore throat diameter under the condition of the maximum hydraulic conductivity includes: calculating the theoretical matrix permeability based on the following formula: in, is the theoretical matrix permeability, is the critical pore throat diameter, is the pore throat diameter under the condition of maximum hydraulic conductivity, is the helium porosity of the first shale, is the mercury saturation corresponding to the pore throat diameter under the condition of maximum hydraulic conductivity; The determining of a helium permeability correction model based on the theoretical matrix permeability and the helium permeability includes: expressing the helium permeability correction model based on the following formula: in, K b is the helium permeability, is the theoretical matrix permeability, m and n are fitting coefficients; the helium permeability correction model characterizes that the theoretical matrix permeability and the helium permeability are positively correlated.

2. The method according to claim 1, characterized in that The step of performing a mercury injection test on the first shale to obtain mercury injection test data of the first shale includes: Performing a mercury injection test on the first shale based on set test parameters to obtain mercury injection pressure data and pore throat distribution data corresponding to the first shale; The mercury injection pressure data represents the relationship between the pressure required for mercury to enter the pore throats of the first shale and the pore throat size; The pore throat distribution data characterizes the size distribution of pore throats within the first shale.

3. The method according to claim 1, characterized in that The helium permeability of the target shale to be corrected is corrected based on the helium permeability correction model, including: Performing a mercury injection test on the target shale to be corrected to determine the target matrix permeability of the target shale to be corrected; Based on the target matrix permeability, the target helium permeability is calculated by using the helium permeability correction model to obtain the target helium permeability; The target helium permeability represents the corrected helium permeability of the target shale to be corrected.

4. The method according to claim 1, characterized in that: The obtaining the helium permeability of the first shale comprises: performing oil washing treatment on the first shale to obtain first shale after oil washing treatment; Drying the first shale after the oil washing treatment to obtain the dried first shale; The first shale after the drying process is tested based on the set overburden porosimeter to obtain the helium permeability of the first shale.

5. A shale helium permeability correction device, characterized in that: include: A testing module, used for performing a mercury injection test on the first shale to obtain mercury injection test data of the first shale; There are no cracks in the structure of the first shale; the mercury injection test data at least includes mercury injection pressure data and pore throat distribution data; A determination module, configured to determine the theoretical matrix permeability of the first shale based on the mercury injection test data; The determining of the theoretical matrix permeability of the first shale based on the mercury injection test data comprises: determining the pore throat diameter of the first shale under the condition of maximum hydraulic conductivity based on the mercury injection pressure data and the pore throat distribution data; determining the critical pore throat diameter based on the mercury injection pressure data and the pore throat distribution data; determining the theoretical matrix permeability based on the pore throat diameter under the condition of maximum hydraulic conductivity and the critical pore throat diameter; The determining the theoretical matrix permeability based on the pore throat diameter and the critical pore throat diameter under the condition of the maximum hydraulic conductivity includes: calculating the theoretical matrix permeability based on the following formula: in, is the theoretical matrix permeability, is the critical pore throat diameter, is the pore throat diameter under the condition of maximum hydraulic conductivity, is the helium porosity of the first shale, is the mercury saturation corresponding to the pore throat diameter under the condition of maximum hydraulic conductivity; An acquisition module, used for acquiring the helium permeability of the first shale; A construction module is used to determine a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; The determining of a helium permeability correction model based on the theoretical matrix permeability and the helium permeability includes: expressing the helium permeability correction model based on the following formula: in, K b is the helium permeability, is the theoretical matrix permeability, m and n are fitting coefficients; the helium permeability correction model characterizes that the theoretical matrix permeability and the helium permeability are positively correlated; The correction module is used to correct the helium permeability of the target shale to be corrected based on the helium permeability correction model.

6. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 4.

7. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to make a computer execute the method according to any one of claims 1 to 4.

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