Shale helium permeability correction method and device, electronic equipment and storage medium

Abstract

The invention provides a shale helium permeability correction method and device, electronic equipment and a storage medium. Relates to the technical field of shale helium permeability correction. The method comprises the following steps: performing mercury injection test on first shale to obtain mercury injection test data of the first shale; no crack exists in the structure of the first shale; the mercury injection test data at least comprise mercury injection pressure data and pore throat distribution data; based on the mercury intrusion test data, determining the theoretical matrix permeability of the first shale; the helium permeability of the first shale is obtained; based on the theoretical matrix permeability and the helium permeability, determining a helium permeability correction model; and correcting the helium permeability of the target shale to be corrected based on the helium permeability correction model. Thus, the quantitative relation between the shale matrix permeability and the complete shale helium permeability can be established, the influence of cracks generated in the shale pretreatment process on the helium permeability test can be eliminated, and the helium permeability representing the shale permeability is accurately obtained.

Description

Technical Field

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

[0002] Shale oil reservoirs are rich in a variety of fluids. In order to eliminate the impact of these fluids on helium permeability testing, oil washing and drying are usually required. However, these treatment processes often cause shale samples to break and produce secondary cracks, which makes the helium permeability obtained by the test seriously too high, making it impossible to accurately evaluate the permeability of shale. Although the current use of waterless wire cutting technology can ensure the integrity of drilled shale samples to a certain extent, the current method still cannot completely eliminate the secondary cracks generated during oil washing and drying. The presence of these cracks 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] The 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, a shale helium permeability correction method is provided, comprising: performing a mercury injection test on a first shale to obtain mercury injection test data of the first shale; no fractures exist in the structure of the first shale; the mercury injection test data at least includes mercury injection pressure data and pore throat distribution data; based on the mercury injection 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 based on the helium permeability correction model, correcting the helium permeability of the target shale to be corrected.

[0005] According to one embodiment of the present invention, performing a mercury injection test on a 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 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 pore throats inside the first shale.

[0006] According to one embodiment of the present invention, determining the theoretical matrix permeability of the first shale based on the mercury injection test data includes: 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; 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 one embodiment of the present invention, 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.

[0008] According to one embodiment of the present invention, the determining of the 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: 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.

[0009] According to one embodiment of the present invention, 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, calculating through the helium permeability correction model to obtain a target helium permeability; the target helium permeability represents the corrected helium permeability of the target shale to be corrected.

[0010] According to one embodiment of the present invention, obtaining the helium permeability of the first shale includes: performing oil washing on the first shale to obtain the first shale after the oil washing treatment; performing drying 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 overburden porosimeter to obtain the helium permeability of the first shale.

[0011] According to a second aspect of the present application, a shale helium permeability correction device is provided, comprising: a testing module, used to perform a mercury injection test on a 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, used to determine the theoretical matrix permeability of the first shale based on the mercury injection test data; an acquisition module, used to acquire the helium permeability of the first shale; a construction module, used to determine a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; and a correction module, used to correct the helium permeability of the target shale to be corrected based on the helium permeability correction model.

[0012] According to a third aspect of the present application, an electronic device is provided, including: at least one processor; and 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 described in the present application.

[0013] According to a fourth aspect of the present application, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described in the present application.

[0014] The method of the embodiment of the present application performs a mercury injection test on the first shale to obtain the 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; based on the mercury injection test data, the theoretical matrix permeability of the first shale is determined; the helium permeability of the first shale is obtained; based on the theoretical matrix permeability and the helium permeability, a helium permeability correction model is determined; based on the helium permeability correction model, the helium permeability of the target shale to be corrected is corrected. In this way, a quantitative relationship between the shale matrix permeability and the complete shale helium permeability is established, 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 that characterizes the permeability of the shale.

[0015] It should be understood that the teachings of the present application are not required to achieve all of the beneficial effects described above, but 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

[0016] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, wherein: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0017] Figure 1 The process flow diagram of the shale helium permeability correction method provided in the embodiment of the present application is shown in FIG. Figure 1 ; Figure 2 The process flow diagram of the shale helium permeability correction method provided in the embodiment of the present application is shown in FIG. Figure 2 ; Figure 3 The process flow diagram of the shale helium permeability correction method provided in the embodiment of the present application is shown in FIG. Figure 3 ; Figure 4 The process flow diagram of the shale helium permeability correction method provided in the embodiment of the present application is shown in FIG. Figure 4 ; Figure 5 The application scenario of the shale helium permeability correction method provided in the embodiment of the present application is shown. Figure 1 ; Figure 6 The application scenario of the shale helium permeability correction method provided in the embodiment of the present application is shown. Figure 2 ; Figure 7 The application scenario of the shale helium permeability correction method provided in the embodiment of the present application is shown. Figure 3 ; Figure 8 The application scenario of the shale helium permeability correction method provided in the embodiment of the present application is shown. Figure 4 ; Fig. 9 An optional schematic diagram of a shale helium permeability correction device provided in an embodiment of the present application is shown; Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0019] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0020] In the following description, the terms "first\second" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0022] The processing flow of the shale helium permeability correction method provided in the embodiment of the present application is described. Figure 1 , Figure 1 The following is a schematic diagram of the processing flow of the shale helium permeability correction method provided in the embodiment of the present application. Figure 1 , will combine Figure 1 Steps S101-S105 are shown for explanation.

[0023] Step S101, performing a mercury injection test on a 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.

[0024] In some embodiments, the first shale may include: a standard shale plug sample obtained by waterless wire cutting drilling. 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 injection test may include: performing a high-pressure mercury injection test using an AutoPore IV 9505 pore analyzer. Specifically, a high-pressure mercury injection test may be performed with reference to the provisions of GB / T 21650.1-2008. The maximum mercury injection pressure of the mercury injection test is 200 MPa. The mercury injection test data may include: a mercury injection-exit curve and pore throat distribution data of the first shale. The mercury injection test data may also include other data of the first shale, which is not limited in the embodiments of the present application.

[0025] Step S102: determining the theoretical matrix permeability of the first shale based on the mercury injection test data.

[0026] In some embodiments, first, the theoretical matrix permeability of the first shale is calculated based on the mercury injection curve segment data and pore throat distribution data in the mercury injection-extraction curve of the high-pressure mercury injection test of the first shale. Specifically, the theoretical matrix permeability of the first shale can be quantitatively calculated based on the mercury injection curve segment data and the Katz and Thompson (KT) method. The theoretical matrix permeability can be used to characterize the permeability of the first shale in the absence of fractures.

[0027] Step S103, obtaining the helium permeability of the first shale.

[0028] Step S104: determining a helium permeability correction model based on the theoretical matrix permeability and the helium permeability.

[0029] In some embodiments, the first shale obtained by waterless wire cutting is subjected to oil washing treatment to obtain the first shale after oil washing treatment. The helium permeability of the first shale can be obtained by performing helium porosity and permeability tests on the first shale after oil washing treatment. Specifically, the helium porosity and permeability tests can be performed with reference to the provisions of GB_T 34533-2023. The helium permeability can be used to indicate the permeability of the first shale under helium flow conditions. The helium permeability correction model can be a functional relationship between the theoretical matrix permeability and the helium permeability.

[0030] Step S105: correcting the helium permeability of the target shale to be corrected based on the helium permeability correction model.

[0031] In some embodiments, for the target shale to be corrected, a mercury injection test is first performed to obtain the mercury injection test data of the target shale to be corrected, and then the theoretical matrix permeability of the target shale to be corrected is calculated based on the mercury injection test data, and then the theoretical matrix permeability is substituted 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 helium flow conditions. The target shale to be corrected may include a complete mud shale sample. The target shale to be corrected may also include an incomplete mud shale sample. The embodiments of the present application do not limit the specific target shale to be corrected.

[0032] 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.

[0033] In some embodiments, step S101 may include: 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 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.

[0034] In this embodiment, the test parameters may include: parameters pre-set according to the characteristics of the first shale and the test requirements. Specifically, the test parameters may include: test pressure range, pressure increment interval, test temperature and other parameters, which may affect the results of the mercury injection test. The specific test parameters may be set with reference to the provisions of GB / T 21650.1-2008. The mercury injection pressure data may include: mercury injection pressure 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.

[0035] In some embodiments, the processing flow of the shale helium permeability correction method is shown as follows: Figure 2 ,like Figure 2 As shown, determining the theoretical matrix permeability of the first shale based on the mercury injection test data in step S102 may include: Step S201: 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.

[0036] In this embodiment, based on the mercury injection pressure data and the pore throat distribution data, the correlation between the pore volume × pore diameter cube and the pore throat diameter of the first shale is determined. The correlation relationship can specifically be a curve of the pore volume × pore diameter cube and the pore throat diameter. The pore throat diameter of the first shale under the maximum hydraulic conductivity may include: the pore throat diameter corresponding to the maximum value of the curve.

[0037] Step S202: determining the critical pore throat diameter based on the mercury injection pressure data and the pore throat distribution data.

[0038] In this embodiment, based on the mercury injection pressure data and the pore throat distribution data, the correlation between the cumulative pore volume of the first shale and the mercury injection pressure is determined. The correlation may specifically be a curve of the cumulative pore volume and the mercury injection pressure. Based on the curve, the cumulative pore volume corresponding to the critical pressure (Pc) when the mercury injection pressure is determined. The corresponding pore throat diameter is determined based on the determined cumulative pore volume. The critical pore throat diameter may include: the pore throat diameter corresponding to the case where the mercury injection pressure is the critical pressure.

[0039] Step S203, determining the theoretical matrix permeability based on the pore throat diameter and the critical pore throat diameter under the condition of maximum hydraulic conductivity.

[0040] In this embodiment, step S203 can be expressed by the following formula (1).

[0041] (1) 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. 1 / 89 is a constant factor, which is an empirical constant. The pore throat diameter under the condition of maximum hydraulic conductivity is less than or equal to the critical pore throat diameter.

[0042] 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.

[0043] In some embodiments, the helium permeability correction model in step S104 can be expressed by the following formula (2).

[0044] (2) in, K b is the helium permeability, is the theoretical matrix permeability, m and n are dimensionless fitting coefficients. The helium permeability correction model shows that the theoretical matrix permeability and helium permeability are positively correlated.

[0045] In some embodiments, the processing flow of the shale helium permeability correction method is shown as follows: Figure 3 , like Figure 3 As shown, in step S105, the helium permeability of the target shale to be corrected is corrected based on the helium permeability correction model, which may specifically include: Step S301: 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.

[0046] Step S302: Based on the target matrix permeability, a helium permeability correction model is used to calculate and obtain a target helium permeability.

[0047] As an example, a high-pressure mercury injection experiment is performed on the target shale to be corrected. The shale sample is placed in a high-pressure mercury injection instrument, and the data such as the amount of mercury injection and the corresponding pore throat diameter at different pressures are recorded to obtain the mercury injection-extraction curve, pore throat distribution data and other information of the target shale to be corrected. Based on the mercury injection-extraction curve and pore throat distribution data obtained in the experiment, the target matrix permeability of the target shale to be corrected is calculated using formula (1). Among them, is the pore throat diameter corresponding to the maximum value of the pore volume × pore diameter ³ and pore throat diameter curve, that is, the optimal seepage pore diameter. is the pore throat diameter corresponding to the critical pressure of the cumulative pore volume versus mercury injection pressure curve, and ≤ Substitute the target matrix permeability into the established helium permeability correction model, and calculate the corrected helium permeability, i.e., the target helium permeability, by formula (2). The target helium permeability can represent the corrected helium permeability of the target shale to be corrected, and the target helium permeability excludes the influence of the cracks generated in the pretreatment process of the target shale to be corrected on the helium permeability.

[0048] 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.

[0049] 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: Step S401, performing oil washing treatment on the first shale to obtain the first shale after the oil washing treatment.

[0050] Step S402, drying the first shale after the oil washing treatment to obtain the dried first shale.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Figure 5 In the figure, the horizontal axis represents the mercury injection pressure in MPa, and the vertical axis represents the cumulative pore volume in cm 3 / g. With the increase of mercury injection pressure, the cumulative pore volume gradually increases. When the mercury injection pressure reaches the critical pressure P c When , the corresponding pore throat diameter is the critical pore throat diameter.

[0057] refer to Figure 6 , application scenarios of the shale helium permeability correction method provided in the embodiment of the present application Figure 2 , a process applied to determine the pore throat diameter of shales at maximum hydraulic conductivity.

[0058] The horizontal axis represents the pore throat diameter in μm, and the vertical axis represents the cumulative pore volume × pore diameter in 10 -9 cm 3 .μm 3The pore throat diameter corresponding to the maximum value point on the curve is the pore throat diameter of the shale under the condition of maximum hydraulic conductivity, that is, the optimal seepage pore diameter.

[0059] refer to Figure 7 An application scenario of the shale helium permeability correction method provided in the embodiment of the present application Figure 3 , which is used to determine the helium permeability correction model.

[0060] The helium permeability correction model can represent the correlation between the matrix permeability of shale and the measured helium permeability. The calculated matrix permeability on the horizontal axis represents the calculated theoretical matrix permeability in units of 10 -9 μm 2 ; The vertical axis represents the measured helium permeability, the unit is 10 -3 μm 2 . Figure 7 The data points in the graph 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. The linear relationship can be explained by y=955.2x 0.595 It means that by fitting these data points, the helium permeability correction model can be obtained. The fitting degree of the helium permeability correction model can be obtained by R 2 Indicates that R 2 =0.9158.

[0061] refer to Figure 8 An application scenario of the shale helium permeability correction method provided in the embodiment of the present application Figure 4 , which is used to correct the helium permeability of the target shale to be corrected through the helium permeability correction model.

[0062] The horizontal axis represents the average pore throat radius in μm, and the vertical axis represents the helium permeability before and after correction in 10 -3 μm 2 . Figure 8 In the figure, before correction, due to the existence of cracks in the target shale to be corrected, the pore throat radius is small but the measured permeability is large, and the data points are scattered. After correction, the corrected permeability is highly positively correlated with the average pore throat radius, and the data points are closely distributed on a straight line, indicating that the corrected helium permeability can more accurately reflect the original pore structure of the shale.

[0063] The following is a description of the exemplary structure of the software modules included in the shale helium permeability correction device 90 provided in the embodiment of the present application. In some embodiments, for example, Fig. 9 As shown, the shale helium permeability correction device 90 may include: The testing module 901 is used to perform 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 902 is used to determine the theoretical matrix permeability of the first shale based on the mercury injection test data; An acquisition module 903 is used to acquire the helium permeability of the first shale; A construction module 904 is used to determine a helium permeability correction model based on the theoretical matrix permeability and the helium permeability; The correction module 905 is used to correct the helium permeability of the target shale to be corrected based on the helium permeability correction model.

[0064] In some embodiments, the test module 901 is used to: perform 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 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 pore throats inside the first shale.

[0065] In some embodiments, the determination module 902 is used to: determine 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; determine the critical pore throat diameter based on the mercury injection 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.

[0066] In some embodiments, the determination module 902 can be used to calculate 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.

[0067] In some embodiments, the construction module 904 can be used to: express 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 shows that the theoretical matrix permeability and helium permeability are positively correlated.

[0068] 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; based on the target matrix permeability, calculate through a helium permeability correction model to obtain a target helium permeability; the target helium permeability represents the helium permeability of the corrected target shale to be corrected.

[0069] In some embodiments, the acquisition module 903 can be used to: perform oil washing on the first shale to obtain the first shale after the oil washing treatment; perform drying on the first shale after the oil washing treatment to obtain the first shale after the drying treatment; and test the first shale after the drying treatment based on the set overburden porosimeter to obtain the helium permeability of the first shale.

[0070] It should be noted that the description of the device in the embodiment of the present application is similar to the description of the method embodiment described above, and has similar beneficial effects as the method embodiment, so it will not be repeated. Figures 1 to 8 The present invention can be understood by referring to the description of any one of the accompanying drawings.

[0071] According to an embodiment of the present application, the present application also provides an electronic device and a non-transitory computer-readable storage medium.

[0072] Fig.10 A schematic block diagram of an example electronic device 800 that can be used to implement an embodiment of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0073] like Fig.10 As shown, the electronic device 800 includes a computing unit 801, which 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 to 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.

[0074] Multiple 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 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 through a computer network such as the Internet and / or various telecommunication networks.

[0075] The computing unit 801 may be a variety of general and / or special 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, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 801 performs 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 may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 808. In some embodiments, part or all of the computer program may be loaded and / or installed on 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 may be performed. Alternatively, in other embodiments, the computing unit 801 may be configured to execute the shale helium permeability correction method in any other appropriate manner (eg, by means of firmware).

[0076] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations 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 purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0077] The program code for implementing the method of the present application can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, implements the functions / operations specified in the flow chart and / or block diagram. The program code can be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0078] In the context of the present application, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0079] To provide 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 pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the 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 input, voice input, or tactile input).

[0080] The systems and techniques described herein may 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 with a graphical user interface or a web browser through which a user can interact with implementations 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 may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0081] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed system, or a server combined with a blockchain.

[0082] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on 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, the helium permeability of the target shale to be corrected is corrected.

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 step of determining the theoretical matrix permeability of the first shale based on the mercury injection test data includes: 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 a critical pore throat diameter based on the mercury injection pressure data and the pore throat distribution data; The theoretical matrix permeability is determined based on the pore throat diameter at the maximum hydraulic conductivity and the critical pore throat diameter.

4. The method according to claim 3, characterized in that The determining of the theoretical matrix permeability based on the pore throat diameter under the condition of the maximum hydraulic conductivity and the critical pore throat diameter comprises: The theoretical matrix permeability was calculated 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.

5. The method according to claim 1, characterized in that The step of determining a helium permeability correction model based on the theoretical matrix permeability and the helium permeability comprises: The helium permeability correction model is 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.

6. 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.

7. 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.

8. 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; 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 correction module is used to correct the helium permeability of the target shale to be corrected based on the helium permeability correction model.

9. 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 7.

10. 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 1-7.

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