Shale gas saturation determination method and device, electronic equipment and storage medium

Abstract

The invention provides a shale gas saturation determination method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring parameter information of a plurality of shale samples; measuring the gas saturation of the organic matter pores of each shale sample, and determining the total organic gas saturation value based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores; based on logging information of shale adjacent to the shale sample, determining gas saturation of inorganic mineral holes, and determining an inorganic gas saturation total value; determining the gas saturation of each shale sample based on the total organic gas saturation value, the total inorganic gas saturation value and the total pore volume; and determining the gas saturation of the shale reservoir based on the gas saturation of the plurality of shale samples. According to the pore type of the shale reservoir and the gas enrichment effect difference of different pores, the gas saturation of inorganic mineral pores and the gas saturation of organic matter pores are comprehensively measured, so that the calculation accuracy of the gas saturation is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of shale gas exploration technology, and in particular to a method, apparatus, electronic device, and storage medium for determining the gas saturation of shale. Background Technology

[0002] Gas saturation is one of the parameters for evaluating the quality of shale reservoirs and an important evaluation indicator for shale gas exploration and site selection in my country. The accuracy of gas saturation calculation directly affects the accurate calculation of shale gas geological resources and has a significant impact on production capacity prediction.

[0003] Currently, shale gas exploration in my country is still in the exploratory and developmental stage. Geological evaluation of shale gas accumulation still partially relies on traditional petroleum geological theories and methods, which has brought certain challenges to shale gas enrichment geological research and exploration practice. Furthermore, the calculation methods for gas saturation in shale reservoirs still follow those for clastic rock reservoirs, and existing gas saturation calculation methods suffer from inaccuracies. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, electronic device, and storage medium for determining the gas saturation of shale to address the aforementioned technical problems.

[0005] A method for determining the gas saturation of shale includes:

[0006] Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores;

[0007] The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0008] Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined.

[0009] Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined.

[0010] The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

[0011] In one embodiment, the inorganic mineral pores include brittle mineral pores and clay mineral pores;

[0012] The step of determining the gas saturation of inorganic mineral pores based on well logging data from adjacent shale samples includes:

[0013] Based on the well logging data of the adjacent shale of the shale sample, the gas saturation of brittle mineral shale and the gas saturation of clay mineral shale were obtained.

[0014] The gas saturation of the brittle mineral shale is defined as the gas saturation of the brittle mineral pores, and the gas saturation of the clay mineral shale is defined as the gas saturation of the clay mineral pores.

[0015] The step of determining the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores includes:

[0016] The brittle gas saturation value is determined based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores.

[0017] The air saturation value of clay is determined based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores.

[0018] Based on the brittle gas saturation value and the clay gas saturation value, the total inorganic gas saturation value is determined.

[0019] In one embodiment, the step of determining the gas saturation of the brittle mineral shale as the gas saturation of the brittle mineral pores, and determining the gas saturation of the clay mineral shale as the gas saturation of the clay mineral pores, includes:

[0020] The average gas saturation of the brittle mineral shale is calculated to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores.

[0021] The average gas saturation of the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

[0022] In one embodiment, the parameter information of each shale sample further includes pore diameter, and each pore diameter corresponds to a pore volume;

[0023] The steps for obtaining parameter information from multiple shale samples include:

[0024] Obtain the total pore volume of the shale sample;

[0025] Based on the pore diameter, the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores are determined, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0026] In one embodiment, the step of determining the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores based on the pore diameter includes:

[0027] The pore volume corresponding to the pore diameter within the first diameter range is determined as the pore volume of the organic matter pores;

[0028] The pore volume corresponding to the pore diameter within the second diameter range is determined as the pore volume of the clay mineral pore;

[0029] The pore volume corresponding to the pore diameter in the third diameter range is determined as the pore volume of brittle mineral pores;

[0030] The pore diameters of the first diameter range, the second diameter range, and the third diameter range increase sequentially.

[0031] In one embodiment, the step of obtaining parameter information from multiple shale samples includes:

[0032] Obtain the total pore volume and the pore volume of organic matter in the shale sample;

[0033] Obtain the inorganic mineral content of the shale sample;

[0034] When the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold, the pore volume of the inorganic mineral pores of multiple shale samples is obtained.

[0035] In one embodiment, it further includes:

[0036] The gas saturation of each shale sample was determined based on a gas saturation calculation model.

[0037] A device for determining the gas saturation of shale, comprising:

[0038] The parameter acquisition module is used to acquire parameter information of multiple shale samples, wherein the parameter information of each shale sample includes the total pore volume, the pore volume of inorganic mineral pores and the pore volume of organic matter pores;

[0039] An organic saturation acquisition module is used to determine the gas saturation of the organic matter pores in each shale sample, and to determine the total organic gas saturation value based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0040] The inorganic saturation acquisition module is used to determine the gas saturation of inorganic mineral pores based on well logging data of adjacent shale of the shale sample, and to determine the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores.

[0041] The first saturation calculation module is used to determine the gas saturation of each shale sample based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume.

[0042] The second saturation calculation module is used to determine the gas saturation of the shale reservoir based on the gas saturation of multiple shale samples.

[0043] An electronic device includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to perform the following steps:

[0044] Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores;

[0045] The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0046] Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined.

[0047] Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined.

[0048] The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

[0049] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0050] Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores;

[0051] The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0052] Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined.

[0053] Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined.

[0054] The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

[0055] The aforementioned method, apparatus, electronic equipment, and storage medium for determining shale gas saturation acquire the total pore volume, inorganic mineral pore volume, organic matter pore volume, and gas saturation of multiple shale samples. Based on the gas saturation of organic matter pores and their pore volumes, the total organic gas saturation value is determined. Then, well logging data from adjacent shale samples are analyzed to obtain the gas saturation of inorganic mineral pores. Based on the gas saturation of inorganic mineral pores and their pore volumes, the total inorganic gas saturation value is determined. Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined. Subsequently, based on the gas saturation of multiple shale samples, the gas saturation of the shale reservoir is calculated. Thus, based on the pore type of shale reservoir and the differences in gas enrichment effects of different pores, the accuracy of gas saturation calculation is effectively improved by comprehensively measuring the gas saturation of inorganic mineral pores and organic matter pores. Attached Figure Description

[0056] Figure 1 This is a flowchart illustrating a method for determining the gas saturation of shale in one embodiment;

[0057] Figure 2 A structural block diagram of a shale gas saturation determination device in one embodiment;

[0058] Figure 3 This is a diagram showing the internal structure of an electronic device in one embodiment.

[0059] Figure 4 This is a flowchart illustrating a method for determining shale gas saturation in another embodiment;

[0060] Figure 5 This is a schematic diagram of a FIB-SEM image of a shale sample in one embodiment;

[0061] Figure 6 This is a schematic diagram showing the relationship between pore diameter and pore volume of a shale sample in one embodiment. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0063] Example 1

[0064] In this embodiment, as Figure 1 As shown, a method for determining the gas saturation of shale is provided, which includes:

[0065] Step 110: Obtain parameter information for multiple shale samples, wherein the parameter information for each shale sample includes total pore volume, pore volume of inorganic mineral pores, and pore volume of organic matter pores.

[0066] In this embodiment, multiple shale samples are collected from the drill core within the study area at preset sampling intervals, thereby completing the shale sampling. In some embodiments, the preset distance is set to 10 centimeters, and multiple shale samples are collected from the drill core within the study area at 10-centimeter sampling intervals.

[0067] In this embodiment, the pores in the shale sample include inorganic mineral pores and organic matter pores. Organic matter pores mainly refer to pores developed within organic matter, while inorganic mineral pores refer to pores mainly existing between or within inorganic mineral particles. Pore volume refers to the ratio of the volume of pore space to the total volume in the shale sample. By measuring the pores, the total pore volume, the pore volume of inorganic mineral pores, and the pore volume of organic matter pores are obtained. In some embodiments, the total pore volume, the pore volume of inorganic mineral pores, and the pore volume of organic matter pores in each shale sample can be determined by FIB-SEM (Focused Ion Beam Scanning Electron Microscopy) experiments.

[0068] Step 120: Determine the gas saturation of the organic matter pores in each shale sample, and determine the total organic gas saturation value based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0069] In this embodiment, since the organic matter pores of the shale are completely occupied by natural gas, the gas saturation of the organic matter pores is defined as 100%. The total gas saturation value of the organic matter pores is obtained by multiplying the gas saturation of the organic matter pores by the pore volume of the organic matter pores.

[0070] Step 130: Based on the well logging data of the shale adjacent to the shale sample, determine the gas saturation of the inorganic mineral pores, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, determine the total value of inorganic gas saturation.

[0071] In this embodiment, shale reservoirs adjacent to the shale sample are collected, and well logging parameters of these reservoirs are obtained using logging equipment. These parameters are then processed to obtain the gas saturation of the inorganic mineral pores. The total inorganic gas saturation value is obtained by multiplying the gas saturation of the inorganic mineral pores by their pore volume. It should be noted that steps 120 and 130 can be performed simultaneously or sequentially; the gas saturation of both organic and inorganic mineral pores needs to be measured.

[0072] Step 140: Determine the gas saturation of each shale sample based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume.

[0073] In this embodiment, after obtaining the total organic gas saturation value and the total inorganic gas saturation value, the two values ​​are added together, and the resulting total gas saturation value is divided by the total pore volume to obtain the gas saturation of each shale sample. In some embodiments, after obtaining the gas saturation of organic matter pores and inorganic mineral pores, the total pore volume, the pore volume of inorganic mineral pores, and the pore volume of organic matter pores obtained in step 110 are combined to calculate the gas saturation of each shale sample. It should be noted that the gas saturation of inorganic mineral pores is different from that of organic matter pores. Based on the pore type of shale reservoir and the differences in gas enrichment effects of different pores, by comprehensively measuring the gas saturation of inorganic mineral pores and organic matter pores, the accuracy of gas saturation calculation is effectively improved.

[0074] Step 150: Determine the gas saturation of the shale reservoir based on the gas saturation of multiple shale samples.

[0075] In this embodiment, after obtaining the gas saturation of multiple shale samples, the average gas saturation of the multiple shale samples is calculated to obtain the average gas saturation value of the shale reservoir. This average gas saturation value is used as the gas saturation value of the shale reservoir. The gas saturation value of the shale reservoir is calculated using the following formula:

[0076]

[0077] In the formula, P g S represents the gas saturation of the shale reservoir. g denoted as ρ, where ρ is the gas saturation of the shale sample, and n is the number of shale samples, where n is an integer greater than 1.

[0078] In some embodiments, after obtaining the gas saturation of multiple shale samples, the median of the multiple gas saturations can also be used as the gas saturation of the shale interlayers. When there are outliers or extreme values ​​among the multiple gas saturations, the method of obtaining the median is more robust and is not affected by outliers or extreme values.

[0079] In the above embodiments, the total pore volume, inorganic mineral pore volume, organic matter pore volume, and gas saturation of organic matter pores are obtained from multiple shale samples. Based on the gas saturation of organic matter pores and their pore volume, the total organic gas saturation value is determined. Then, well logging data from shale adjacent to the shale samples are analyzed to obtain the gas saturation of inorganic mineral pores. Based on the gas saturation of inorganic mineral pores and their pore volume, the total inorganic gas saturation value is determined. Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined. Subsequently, based on the gas saturation of multiple shale samples, the gas saturation of the shale reservoir is calculated. Thus, by comprehensively considering the gas saturation of inorganic mineral pores and organic matter pores, the accuracy of gas saturation calculation is effectively improved, taking into account the pore type of the shale reservoir and the differences in gas enrichment effects of different pores.

[0080] In one embodiment, the inorganic mineral pores include brittle mineral pores and clay mineral pores;

[0081] The step of determining the gas saturation of inorganic mineral pores based on well logging data from adjacent shale samples includes:

[0082] Based on the well logging data of the adjacent shale of the shale sample, the gas saturation of brittle mineral shale and the gas saturation of clay mineral shale were obtained.

[0083] The gas saturation of the brittle mineral shale is defined as the gas saturation of the brittle mineral pores, and the gas saturation of the clay mineral shale is defined as the gas saturation of the clay mineral pores.

[0084] The step of determining the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores includes:

[0085] The brittle gas saturation value is determined based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores.

[0086] The air saturation value of clay is determined based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores.

[0087] Based on the brittle gas saturation value and the clay gas saturation value, the total inorganic gas saturation value is determined.

[0088] In this embodiment, after analyzing the well logging data of shale adjacent to the shale sample, the gas saturation of brittle mineral shale and clay mineral shale are obtained. Brittle mineral shale can also be referred to as an organic-poor and brittle mineral-rich shale reservoir, and clay mineral shale can also be referred to as an organic-poor and clay mineral-rich shale reservoir. Since the reservoir space of an organic-poor and brittle mineral-rich shale reservoir is entirely provided by brittle minerals, and the reservoir space of an organic-poor and clay mineral-rich shale reservoir is entirely provided by clay minerals, the gas saturation of brittle mineral shale can be defined as the gas saturation of the brittle mineral pores, and the gas saturation of clay mineral shale can be defined as the gas saturation of the clay mineral pores.

[0089] In this embodiment, after obtaining the gas saturation of brittle mineral pores and clay mineral pores, the gas saturation of brittle mineral pores is multiplied by their pore volume to obtain the brittle gas saturation value, and the gas saturation of clay mineral pores is multiplied by their pore volume to obtain the clay gas saturation value. The brittle gas saturation value and the clay gas saturation value are then added together to obtain the total inorganic gas saturation value. Then, the total organic gas saturation value and the total inorganic gas saturation value are added together, and the resulting total gas saturation value is divided by the total pore volume to obtain the gas saturation of the shale sample. The gas saturation of each shale sample can be calculated using the following formula:

[0090]

[0091] In the formula, S g V represents the gas saturation of the shale sample, and V represents the total pore volume. a1 B represents the pore volume of brittle minerals. a1 V represents the gas saturation of the pores in brittle minerals. a2 B represents the pore volume of clay minerals. a2 V represents the gas saturation of the pores in clay minerals. org B represents the pore volume of organic matter pores. org This represents the gas saturation of the organic matter pores.

[0092] In one embodiment, the parameter information of each shale sample further includes pore diameter, and each pore diameter corresponds to a pore volume;

[0093] The steps for obtaining parameter information from multiple shale samples include:

[0094] Obtain the total pore volume of the shale sample;

[0095] Based on the pore diameter, the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores are determined, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0096] In this embodiment, the pore diameters of organic matter pores differ from those of inorganic mineral pores. After obtaining the pore diameters in the shale sample, the pore volumes of inorganic mineral pores and organic matter pores are determined based on these diameters. Furthermore, among inorganic mineral pores, the pore diameters of brittle mineral pores and clay mineral pores also differ.

[0097] In one embodiment, the step of determining the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores based on the pore diameter includes:

[0098] The pore volume corresponding to the pore diameter within the first diameter range is determined as the pore volume of the organic matter pores;

[0099] The pore volume corresponding to the pore diameter within the second diameter range is determined as the pore volume of the clay mineral pore;

[0100] The pore volume corresponding to the pore diameter in the third diameter range is determined as the pore volume of brittle mineral pores;

[0101] The pore diameters of the first diameter range, the second diameter range, and the third diameter range increase sequentially.

[0102] In this embodiment, the extreme values ​​at both ends of the third diameter range are greater than the extreme values ​​at both ends of the second diameter range, and the extreme values ​​at both ends of the second diameter range are greater than the extreme values ​​at both ends of the first diameter range.

[0103] In this embodiment, after obtaining the pore diameter in the shale sample, the pore volume of clay mineral pores, brittle mineral pores, and organic matter pores are determined based on the pore diameter. When the pore diameter is within a first diameter range, the pore volume corresponding to that pore diameter is determined as the pore volume of organic matter pores. When the pore diameter is within a second diameter range, the pore volume corresponding to that pore diameter is determined as the pore volume of clay mineral pores. When the pore diameter is within a third diameter range, the pore volume corresponding to that pore diameter is determined as the pore volume of brittle mineral pores.

[0104] In some embodiments, the first diameter range is less than 30 nm, that is, the pore diameter of organic matter pores is less than 30 nm, and the pore volume corresponding to the pore diameter less than 30 nm is determined as the pore volume of organic matter pores; the second diameter range is greater than or equal to 30 nm and less than 300 nm, that is, the pore diameter of clay mineral pores of clay minerals (illite and kaolinite) is greater than or equal to 30 nm and less than 300 nm, and the pore volume corresponding to the pore diameter greater than or equal to 30 nm and less than 300 nm is determined as the pore volume of clay mineral pores; the third diameter range is greater than or equal to 300 nm, that is, the pore diameter of brittle mineral pores of brittle minerals (including quartz, plagioclase, potassium feldspar) is greater than or equal to 300 nm, and the pore volume corresponding to the pore diameter greater than or equal to 300 nm is determined as the pore volume of brittle mineral pores.

[0105] In one embodiment, the step of obtaining parameter information from multiple shale samples includes:

[0106] Obtain the total pore volume and the pore volume of organic matter in the shale sample;

[0107] Obtain the inorganic mineral content of the shale sample;

[0108] When the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold, the pore volume of the inorganic mineral pores of multiple shale samples is obtained.

[0109] In this embodiment, the inorganic mineral composition of shale samples is identified using QEMSCAN (Quantitative Evaluation of Minerals by Scanning Electron Microscopy) experiments to obtain the inorganic mineral content of the shale samples. After obtaining the inorganic mineral content of the shale samples, inorganic minerals with an inorganic mineral content greater than or equal to a preset content threshold are considered, while inorganic minerals with an inorganic mineral content less than the preset content threshold are ignored. Therefore, when the inorganic mineral content of a shale sample is greater than or equal to the preset content threshold, the pore volume of inorganic mineral pores corresponding to inorganic minerals with an inorganic mineral content greater than or equal to the preset content threshold in multiple shale samples is obtained. In some embodiments, the preset content threshold is set to 2%. When the inorganic mineral content is less than 2%, inorganic minerals with an inorganic mineral content less than 2% are ignored. For example, if the content of potassium feldspar in brittle minerals is less than 2%, the pore volume of brittle mineral pores in potassium feldspar is not considered.

[0110] In one embodiment, the step of determining the gas saturation of the brittle mineral shale as the gas saturation of the brittle mineral pores, and determining the gas saturation of the clay mineral shale as the gas saturation of the clay mineral pores, includes:

[0111] The average gas saturation of the brittle mineral shale is calculated to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores.

[0112] The average gas saturation of the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

[0113] In this embodiment, when acquiring well logging data of shale adjacent to the shale sample, gas saturation data needs to be collected at unit intervals for both brittle mineral shale and clay mineral shale to obtain multiple gas saturation values ​​for both brittle mineral shale and clay mineral shale. Then, the average of these multiple gas saturation values ​​for the brittle mineral shale is calculated to obtain the average gas saturation value for the brittle mineral, which is then determined as the gas saturation value of the brittle mineral pores. Similarly, the average of these multiple gas saturation values ​​for the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, which is then determined as the gas saturation value of the clay mineral pores.

[0114] In one embodiment, the method further includes: determining the gas saturation of each shale sample based on a gas saturation calculation model.

[0115] In this embodiment, the gas saturation calculation model is as follows:

[0116]

[0117] In the formula, S g V represents the gas saturation of the shale sample, and V represents the total pore volume. a1 B represents the pore volume of brittle minerals. a1 V represents the gas saturation of the pores in brittle minerals. a2 B represents the pore volume of clay minerals. a2 V represents the gas saturation of the pores in clay minerals. org B represents the pore volume of organic matter pores. org This represents the gas saturation of the organic matter pores.

[0118] In this embodiment, based on the gas saturation calculation model, the total pore volume, the pore volume of inorganic mineral pores, and the pore volume of organic matter pores obtained in step 110, as well as the gas saturation of organic matter pores and inorganic mineral pores obtained in step 120, are substituted into the gas saturation calculation model to calculate the gas saturation of each shale sample. After obtaining the gas saturation of multiple shale samples, the average value of the gas saturation of multiple shale samples is calculated to obtain the gas saturation of the shale reservoir.

[0119] It should be understood that, although Figure 1The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0120] Example 2

[0121] In this embodiment, as Figure 4 As shown, a method for determining the gas saturation of shale is provided, including:

[0122] Step 1: Collect n shale samples from the drill core in the study area at 10cm sampling intervals;

[0123] Step 2: Use the QEMSCAN experiment to identify the inorganic mineral composition (a1, a2, a3...an) of each shale sample and classify them into two categories: brittle mineral pores and clay mineral pores;

[0124] Step 3: Use FIB-SEM experiments to determine the total pore volume (V) of each shale sample and the pore volume corresponding to different pore diameters;

[0125] Step 4: Determine the pore volume (V) of organic matter in each shale sample using FIB-SEM experiments. org );

[0126] Step 5: Based on the inorganic mineral composition measured in Step 2 and the pore volume measured in Step 3, determine the pore volume (V) of brittle mineral pores and clay mineral pores. a1 V a2 );

[0127] Step Six: Since the organic matter pores of shale are completely occupied by natural gas, the gas saturation of the organic matter pores (B) is defined. org ) is 100%;

[0128] Step 7: Calculate the average gas saturation values ​​of well logging interpretation for the shale section with low organic matter and high brittle mineral content and the shale section with low organic matter and high clay mineral content, respectively, and use them as the gas saturation values ​​for the shale reservoir with low organic matter and high brittle mineral content and the shale with low organic matter and high clay mineral content.

[0129] Step 8: Calculate the gas saturation (Bg) of the brittle mineral porosity and clay mineral porosity of the shale sample.a1 B a2 ).

[0130] The reservoir space of shale reservoirs that are poor in organic matter and rich in brittle minerals is entirely provided by brittle minerals, while the reservoir space of shale reservoirs that are poor in organic matter and rich in clay minerals is entirely provided by clay minerals. Therefore, the gas saturation data of shale reservoirs poor in organic matter and rich in brittle minerals and shale reservoirs poor in organic matter and rich in clay minerals near the sample can be used as the gas saturation of brittle mineral pores and clay mineral pores, respectively.

[0131] Step Nine: Calculate the gas saturation (S) of each shale sample based on the different types of pore volumes collected in Steps Four and Five and the natural gas volume ratios from Steps Six to Eight. g ).

[0132]

[0133] In the formula, S g V represents the gas saturation of the shale sample, and V represents the total pore volume. a1 B represents the pore volume of brittle minerals. a1 V represents the gas saturation of the pores in brittle minerals. a2 B represents the pore volume of clay minerals. a2 V represents the gas saturation of the pores in clay minerals. org B represents the pore volume of organic matter pores. org This represents the gas saturation of the organic matter pores.

[0134] Step 10: Calculate the average gas saturation of all samples as the gas saturation of the shale reservoir (P0). g ).

[0135]

[0136] In the formula, P g S represents the gas saturation of the shale reservoir. g denoted as ρ, where ρ is the gas saturation of the shale sample, and n is the number of shale samples, where n is an integer greater than 1.

[0137] In this embodiment, based on the pore type of shale reservoirs and the differences in gas-enriching effects of different pore types, a quantitative method for determining the gas saturation of shale reservoirs was established. This enables rapid evaluation of the gas saturation of shale reservoirs during shale gas exploration, identifying "sweet spots" in shale gas exploration. This method has a sound theoretical basis, strong operability, and high reliability of evaluation results, solving the current problem of inaccurate evaluation of shale reservoir gas saturation. In this embodiment, addressing the issue that conventional methods cannot accurately calculate shale reservoir gas saturation, a calculation method for shale reservoir gas saturation was established based on considering the pore type of shale reservoirs. Using this invention, the gas saturation of shale reservoirs can be evaluated quickly and accurately, providing guidance for shale gas resource evaluation and exploration practices.

[0138] Example 3

[0139] In this embodiment, as Figure 4 As shown, a method for determining the gas saturation of shale is provided, including:

[0140] S10: Select shale reservoirs within the study area and collect two shale samples at 10cm intervals;

[0141] S20: The inorganic mineral composition of the two shale samples was identified using the QEMSCAN experiment. Minerals with a content of less than 2% were ignored (as shown in Table 1).

[0142] Table 1 Total pore volume and inorganic mineral composition of shale samples

[0143]

[0144]

[0145] S30: As Figure 5 As shown, three-dimensional SEM images of the two samples were obtained using FIB-SEM experiments, and the total pore volume and organic matter pore volume of the two shale samples were measured respectively.

[0146] S40: As Figure 6 As shown, the pore volume corresponding to different pore diameters in each shale sample was obtained according to S30 (as shown in Table 2);

[0147] Table 2 shows the calculated pore volumes of inorganic minerals.

[0148]

[0149] S50: Calculate the pore volume of brittle minerals and clay minerals based on the pore volume corresponding to different pore sizes collected in S30.

[0150] Studies have confirmed that the pore size of brittle minerals (including quartz, plagioclase, and potassium feldspar) is generally greater than 300 nm, the pore size of clay minerals (illite and kaolinite) is generally less than 300 nm, and the pore size of organic matter is generally less than 30 nm. Therefore, the pore volume of 300 nm to 500 nm is assigned to the pores associated with brittle minerals, and the pore volume of 30 nm to 300 nm is assigned to the pores associated with clay minerals.

[0151] S60: Determine the proportion of natural gas in the pores of inorganic minerals and organic matter;

[0152] Based on the gas saturation data interpreted from well logging, the gas saturation of the adjacent organic-poor and brittle mineral-rich shale reservoir and the organic-poor and clay mineral-rich shale reservoir were determined to be 56.95% and 73.80%, respectively. Thus, the proportion of natural gas in the clay mineral pores and brittle mineral pores was determined to be 56.95% and 73.80%, respectively (as shown in Table 3).

[0153] Table 3. Proportion of natural gas in inorganic mineral pore volume and organic matter pore volume.

[0154] Pore ​​type Natural gas volume percentage (%) organic matter 100.00 Quartz + Plagioclase + Potassium Feldspar 73.80 illite + kaolinite 56.95

[0155] S70: Based on the calculation results of S50 and S60, the gas saturation of the two shale samples was calculated to be 63.59% and 58.29% respectively using the following formulas:

[0156]

[0157] In the formula, S g V represents the gas saturation of the shale sample, and V represents the total pore volume. a1 B represents the pore volume of brittle minerals. a1 V represents the gas saturation of the pores in brittle minerals. a2 B represents the pore volume of clay minerals. a2 V represents the gas saturation of the pores in clay minerals. org B represents the pore volume of organic matter pores. org The gas saturation of the organic matter pores;

[0158] S80: Based on the calculation results of step S70 and the following formula, the gas saturation of the shale reservoir is calculated to be 60.94%.

[0159]

[0160] In the formula, P g S represents the gas saturation of the shale reservoir. g denoted as ρ, where ρ is the gas saturation of the shale sample, and n is the number of shale samples, where n is an integer greater than 1.

[0161] In this embodiment, addressing the problem that conventional methods cannot accurately calculate the gas saturation of shale reservoirs, a method for calculating the gas saturation of shale reservoirs is established based on consideration of shale reservoir pore types. Using this invention, the gas saturation of shale reservoirs can be evaluated quickly and accurately, which is of guiding significance for shale gas resource evaluation and exploration practices.

[0162] Example 4

[0163] In this embodiment, as Figure 2 As shown, a device for determining the gas saturation of shale is provided, comprising:

[0164] The parameter acquisition module 210 is used to acquire parameter information of multiple shale samples, wherein the parameter information of each shale sample includes the total pore volume, the pore volume of inorganic mineral pores and the pore volume of organic matter pores;

[0165] The organic saturation acquisition module 220 is used to determine the gas saturation of the organic matter pores in each shale sample, and to determine the total organic gas saturation value based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0166] The inorganic saturation acquisition module 230 is used to determine the gas saturation of inorganic mineral pores based on well logging data of shale adjacent to the shale sample, and to determine the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores.

[0167] The first saturation calculation module 240 is used to determine the gas saturation of each shale sample based on the total organic gas saturation value, the total inorganic gas saturation value and the total pore volume.

[0168] The second saturation calculation module 250 is used to determine the gas saturation of the shale reservoir based on the gas saturation of multiple shale samples.

[0169] In one embodiment, the inorganic saturation acquisition module 230 includes:

[0170] The analysis unit is used to obtain the gas saturation of brittle mineral shale and clay mineral shale based on the well logging data of adjacent shales of the shale sample.

[0171] The determining unit is used to determine the gas saturation of the brittle mineral shale as the gas saturation of the brittle mineral pores, and to determine the gas saturation of the clay mineral shale as the gas saturation of the clay mineral pores, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0172] In one embodiment, the inorganic saturation acquisition module 230 further includes:

[0173] A brittle saturation unit is used to determine the brittle gas saturation value based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores.

[0174] A clay saturation unit is used to determine the clay gas saturation value based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores.

[0175] The inorganic total value determination unit is used to determine the inorganic total gas saturation value based on the brittle gas saturation value and the clay gas saturation value.

[0176] In one embodiment, the parameter acquisition module 210 includes:

[0177] A volume acquisition unit is used to acquire the total pore volume of the shale sample;

[0178] The volume determination unit is used to determine the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores based on the pore diameter, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores, and the parameter information of each shale sample also includes the pore diameter, and each pore diameter corresponds to a pore volume.

[0179] In one embodiment, the volume determination unit includes:

[0180] The first determining subunit is used to determine the pore volume corresponding to the pore diameter within the first diameter range as the pore volume of the organic matter pores;

[0181] The second determining subunit is used to determine the pore volume corresponding to the pore diameter within the second diameter range as the pore volume of the clay mineral pore;

[0182] The third determining subunit is used to determine the pore volume corresponding to the pore diameter in the third diameter range as the pore volume of the brittle mineral pore; wherein the pore diameters of the first diameter range, the second diameter range and the third diameter range increase sequentially.

[0183] In one embodiment, the parameter acquisition module 210 includes:

[0184] The first acquisition unit is used to acquire the total pore volume and the pore volume of organic matter pores of the shale sample;

[0185] The second acquisition unit is used to acquire the inorganic mineral content of the shale sample;

[0186] An inorganic volume acquisition unit is used to acquire the pore volume of inorganic mineral pores in multiple shale samples when the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold.

[0187] In one embodiment, the determining unit includes:

[0188] The brittle gas-saturated subunit is used to calculate the average gas saturation of the brittle mineral shale to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores.

[0189] The clay gas saturation subunit is used to calculate the average gas saturation of the clay mineral shale to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

[0190] In one embodiment, the device further includes:

[0191] The third saturation calculation module is used to determine the gas saturation of each shale sample based on the gas saturation calculation model.

[0192] Specific limitations regarding the shale gas saturation determination device can be found in the limitations of the shale gas saturation determination method described above, and will not be repeated here. Each unit in the aforementioned shale gas saturation determination device can be implemented entirely or partially through software, hardware, or a combination thereof. These units can be embedded in or independent of the processor in the electronic device, or stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of each unit.

[0193] Example 5

[0194] In this embodiment, an electronic device is provided. Its internal structure diagram can be shown as follows: Figure 3 As shown, the electronic device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs, and also contains a database for storing parameter information of shale samples. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with other electronic devices that have deployed application software. When the processor executes the computer program, it implements a method for determining the gas saturation of shale. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the device's casing, or an external keyboard, touchpad, or mouse.

[0195] Those skilled in the art will understand that Figure 3The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0196] In one embodiment, an electronic device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the following steps:

[0197] Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores;

[0198] The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0199] Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined.

[0200] Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined.

[0201] The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

[0202] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0203] Based on the well logging data of the adjacent shale of the shale sample, the gas saturation of brittle mineral shale and the gas saturation of clay mineral shale were obtained.

[0204] The gas saturation of the brittle mineral shale is defined as the gas saturation of the brittle mineral pores, and the gas saturation of the clay mineral shale is defined as the gas saturation of the clay mineral pores; the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0205] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0206] The brittle gas saturation value is determined based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores.

[0207] The air saturation value of clay is determined based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores.

[0208] Based on the brittle gas saturation value and the clay gas saturation value, the total inorganic gas saturation value is determined.

[0209] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0210] The total pore volume of the shale sample is obtained; the parameter information of each shale sample also includes the pore diameter, and each pore diameter corresponds to a pore volume;

[0211] Based on the pore diameter, the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores are determined, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0212] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0213] The pore volume corresponding to the pore diameter within the first diameter range is determined as the pore volume of the organic matter pores;

[0214] The pore volume corresponding to the pore diameter within the second diameter range is determined as the pore volume of the clay mineral pore;

[0215] The pore volume corresponding to the pore diameter in the third diameter range is determined as the pore volume of brittle mineral pores;

[0216] The pore diameters of the first diameter range, the second diameter range, and the third diameter range increase sequentially.

[0217] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0218] Obtain the total pore volume and the pore volume of organic matter in the shale sample;

[0219] Obtain the inorganic mineral content of the shale sample;

[0220] When the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold, the pore volume of the inorganic mineral pores of multiple shale samples is obtained.

[0221] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0222] The average gas saturation of the brittle mineral shale is calculated to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores.

[0223] The average gas saturation of the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

[0224] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0225] The gas saturation of each shale sample was determined based on a gas saturation calculation model.

[0226] Example 6

[0227] In this embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it performs the following steps:

[0228] Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores;

[0229] The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores.

[0230] Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined.

[0231] Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined.

[0232] The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

[0233] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0234] Based on the well logging data of the adjacent shale of the shale sample, the gas saturation of brittle mineral shale and the gas saturation of clay mineral shale were obtained.

[0235] The gas saturation of the brittle mineral shale is defined as the gas saturation of the brittle mineral pores, and the gas saturation of the clay mineral shale is defined as the gas saturation of the clay mineral pores; the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0236] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0237] The brittle gas saturation value is determined based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores.

[0238] The air saturation value of clay is determined based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores.

[0239] Based on the brittle gas saturation value and the clay gas saturation value, the total inorganic gas saturation value is determined.

[0240] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0241] The total pore volume of the shale sample is obtained; the parameter information of each shale sample also includes the pore diameter, and each pore diameter corresponds to a pore volume;

[0242] Based on the pore diameter, the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores are determined, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

[0243] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0244] The pore volume corresponding to the pore diameter within the first diameter range is determined as the pore volume of the organic matter pores;

[0245] The pore volume corresponding to the pore diameter within the second diameter range is determined as the pore volume of the clay mineral pore;

[0246] The pore volume corresponding to the pore diameter in the third diameter range is determined as the pore volume of brittle mineral pores;

[0247] The pore diameters of the first diameter range, the second diameter range, and the third diameter range increase sequentially.

[0248] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0249] Obtain the total pore volume and the pore volume of organic matter in the shale sample;

[0250] Obtain the inorganic mineral content of the shale sample;

[0251] When the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold, the pore volume of the inorganic mineral pores of multiple shale samples is obtained.

[0252] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0253] The average gas saturation of the brittle mineral shale is calculated to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores.

[0254] The average gas saturation of the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

[0255] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0256] The gas saturation of each shale sample was determined based on a gas saturation calculation model.

[0257] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0258] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0259] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for determining the gas saturation of shale, characterized in that, include: Parameter information of multiple shale samples is obtained, wherein the parameter information of each shale sample includes total pore volume, pore volume of inorganic mineral pores and pore volume of organic matter pores; The gas saturation of the organic matter pores in each shale sample was determined, and the total organic gas saturation value was determined based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores. Based on the well logging data of the shale adjacent to the shale sample, the gas saturation of the inorganic mineral pores is determined, and based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores, the total value of inorganic gas saturation is determined. Based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume, the gas saturation of each shale sample is determined. The gas saturation of the shale reservoir was determined based on the gas saturation of multiple shale samples.

2. The method for determining the gas saturation of shale according to claim 1, characterized in that, The inorganic mineral pores include brittle mineral pores and clay mineral pores; The step of determining the gas saturation of inorganic mineral pores based on well logging data from adjacent shale samples includes: Based on the well logging data of the adjacent shale of the shale sample, the gas saturation of brittle mineral shale and the gas saturation of clay mineral shale were obtained. The gas saturation of the brittle mineral shale is defined as the gas saturation of the brittle mineral pores, and the gas saturation of the clay mineral shale is defined as the gas saturation of the clay mineral pores. The step of determining the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores includes: The brittle gas saturation value is determined based on the gas saturation of the brittle mineral pores and the pore volume of the brittle mineral pores. The air saturation value of clay is determined based on the gas saturation of the clay mineral pores and the pore volume of the clay mineral pores. Based on the brittle gas saturation value and the clay gas saturation value, the total inorganic gas saturation value is determined.

3. The method for determining the gas saturation of shale according to claim 2, characterized in that, The steps of determining the gas saturation of the brittle mineral shale as the gas saturation of the brittle mineral pores and determining the gas saturation of the clay mineral shale as the gas saturation of the clay mineral pores include: The average gas saturation of the brittle mineral shale is calculated to obtain the average gas saturation value of the brittle mineral, and the average gas saturation value of the brittle mineral is determined as the gas saturation of the brittle mineral pores. The average gas saturation of the clay mineral shale is calculated to obtain the average gas saturation value of the clay mineral, and the average gas saturation value of the clay mineral is determined as the gas saturation of the clay mineral pores.

4. The method for determining the gas saturation of shale according to claim 1, characterized in that, The parameter information for each shale sample also includes pore diameter, and each pore diameter corresponds to a pore volume; The steps for obtaining parameter information from multiple shale samples include: Obtain the total pore volume of the shale sample; Based on the pore diameter, the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores are determined, wherein the inorganic mineral pores include brittle mineral pores and clay mineral pores.

5. The method for determining the gas saturation of shale according to claim 4, characterized in that, The step of determining the pore volume of the inorganic mineral pores and the pore volume of the organic matter pores based on the pore diameter includes: The pore volume corresponding to the pore diameter within the first diameter range is determined as the pore volume of the organic matter pores; The pore volume corresponding to the pore diameter within the second diameter range is determined as the pore volume of the clay mineral pore; The pore volume corresponding to the pore diameter in the third diameter range is determined as the pore volume of brittle mineral pores; The pore diameters of the first diameter range, the second diameter range, and the third diameter range increase sequentially.

6. The method for determining the gas saturation of shale according to claim 1, characterized in that, The steps for obtaining parameter information from multiple shale samples include: Obtain the total pore volume and the pore volume of organic matter in the shale sample; Obtain the inorganic mineral content of the shale sample; When the inorganic mineral content of the shale sample is greater than or equal to a preset content threshold, the pore volume of the inorganic mineral pores of multiple shale samples is obtained.

7. The method for determining the gas saturation of shale according to any one of claims 1-6, characterized in that, Also includes: The gas saturation of each shale sample was determined based on a gas saturation calculation model.

8. A device for determining the gas saturation of shale, characterized in that, include: The parameter acquisition module is used to acquire parameter information of multiple shale samples, wherein the parameter information of each shale sample includes the total pore volume, the pore volume of inorganic mineral pores and the pore volume of organic matter pores; An organic saturation acquisition module is used to determine the gas saturation of the organic matter pores in each shale sample, and to determine the total organic gas saturation value based on the gas saturation of the organic matter pores and the pore volume of the organic matter pores. The inorganic saturation acquisition module is used to determine the gas saturation of inorganic mineral pores based on well logging data of adjacent shale of the shale sample, and to determine the total inorganic gas saturation value based on the gas saturation of the inorganic mineral pores and the pore volume of the inorganic mineral pores. The first saturation calculation module is used to determine the gas saturation of each shale sample based on the total organic gas saturation value, the total inorganic gas saturation value, and the total pore volume. The second saturation calculation module is used to determine the gas saturation of the shale reservoir based on the gas saturation of multiple shale samples.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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