Quantitative evaluation method and system for shale oil-water storage capacity

Abstract

The invention relates to a shale oil-water storage capacity quantitative evaluation method and system, and belongs to the technical field of shale testing. The evaluation method comprises the following steps: obtaining volume conversion parameters based on the dry weight of a shale sample, the weight of a saturated water shale sample, the weight of a saturated oil shale sample, a saturated water shale sample T2 spectrum curve and a saturated oil shale sample T2 spectrum curve; based on the volume conversion parameters, respectively carrying out isovolumetric water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation; and completing shale oil-water reservoir capacity evaluation based on an isovolumetric water conversion result. According to the method, the volume conversion parameter K conversion method is adopted, the absorption and storage capacity characterization of the interior of the shale pores to the oil-water medium is regressed, the method is not affected by external characterization conditions and human factors, and the evaluation result is more scientific and objective.

Description

Technical Field

[0001] The present invention belongs to the technical field of shale testing, and in particular relates to a method and system for quantitatively evaluating the oil and water storage capacity of shale. Background Art

[0002] Due to the unique mixed "dalmatian" wettability of shale, pure non-clay minerals (quartz, calcite, dolomite, feldspar, pyrite) in shale are usually hydrophilic, but can change with contact with oil components, brine type and salinity. The speckled (micrometer-level) distributed organic matter particles are lipophilic and surrounded by hydrophilic minerals, which affects the adsorption capacity of oil and water inside the shale reservoir. When two immiscible fluids exist in the shale pores, one phase of the fluid has a stronger affinity or spreadability for the shale pore surface than the other phase of the fluid, which leads to a large difference in the storage capacity of the pores in the shale for oil and water, with both hydrophilic and oil-wet pores.

[0003] In summary, the current research on the quantitative characterization of oil and water storage capacity in shale is somewhat difficult, and the accuracy standard cannot meet the evaluation needs in current production practice. Summary of the invention

[0004] In view of the above problems, the present invention provides a method and system for quantitatively evaluating the shale oil and water storage capacity.

[0005] The first object of the present invention is to provide a quantitative evaluation method for shale oil and water storage capacity, the evaluation method comprising:

[0006] Based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the T2 spectrum curve of the water-saturated shale sample, and the T2 spectrum curve of the oil-saturated shale sample, the volume conversion parameter is obtained;

[0007] Based on the volume conversion parameter, the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation are respectively converted into equal volumes of water;

[0008] Based on the equal volume water conversion results, the shale oil and water storage capacity evaluation is completed.

[0009] In an embodiment of the present invention, the water-saturated shale sample is obtained by subjecting a dry shale sample to a vacuum water-saturated test, and the oil-saturated shale sample is obtained by subjecting a dry shale sample to a vacuum oil-saturated test, and the vacuum conditions in the vacuum water-saturated test and the vacuum oil-saturated test are the same.

[0010] In an embodiment of the present invention, the volume conversion parameter is calculated according to the following formula:

[0011]

[0012] Wherein, K is the volume conversion parameter, ρ1 is the density of water, ρ2 is the density of oil, m0 is the dry weight of the shale sample, m1 is the weight of the water-saturated shale sample, m2 is the weight of the oil-saturated shale sample, S1 is the integral area of ​​the T2 spectrum curve of the water-saturated shale sample, and S2 is the integral area of ​​the T2 spectrum curve of the oil-saturated shale sample.

[0013] In an embodiment of the present invention, the T2 spectrum curve of the oil-water coexistence simulation includes the following steps to obtain:

[0014] A vacuum saturated manganese chloride solution test is performed on the dry shale sample to obtain a saturated manganese chloride solution shale sample;

[0015] Based on the hydrogen ion nuclear magnetic resonance test of the saturated manganese chloride solution shale sample, the T2 spectrum curve of the saturated manganese chloride solution shale sample is obtained;

[0016] Based on the ion NMR test results of dry shale samples, the T2 spectrum curve area of ​​water-saturated shale samples, the T2 spectrum curve of oil-saturated shale samples, and the T2 spectrum curve of saturated manganese chloride solution shale samples were inverted;

[0017] Based on the inversion results, the T2 spectrum curve of water coexistence simulation is obtained.

[0018] The second object of the present invention is to provide a quantitative evaluation system for shale oil and water storage capacity, the evaluation system comprising:

[0019] The conversion parameter module is used to obtain volume conversion parameters based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the area of ​​the T2 spectrum curve of the water-saturated shale sample, and the area of ​​the T2 spectrum curve of the oil-saturated shale sample;

[0020] The conversion curve module is used to perform equal volume water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation respectively based on the volume conversion parameter;

[0021] The evaluation module is used to complete the evaluation of shale oil and water storage capacity based on the equal volume water conversion results.

[0022] In the embodiment of the present invention, a test module is also included;

[0023] The test module is used to perform a vacuum saturated water test, a vacuum saturated oil test and a vacuum saturated manganese chloride solution test on dry shale samples respectively, and the vacuum conditions in the vacuum saturated water test, the vacuum saturated oil test and the vacuum saturated manganese chloride solution test are the same.

[0024] In the embodiment of the present invention, it also includes a hydrogen ion nuclear magnetic resonance testing module;

[0025] The hydrogen ion nuclear magnetic resonance test module is used to perform hydrogen ion nuclear magnetic resonance testing on water-saturated rock samples obtained by vacuum saturated water test, oil-saturated rock samples obtained by vacuum saturated oil test, and saturated manganese chloride solution shale samples.

[0026] In an embodiment of the present invention, the T2 spectrum curve of the water coexistence simulation includes the following steps to obtain:

[0027] A vacuum saturated manganese chloride solution test is performed on the dry shale sample to obtain a saturated manganese chloride solution shale sample;

[0028] Based on the hydrogen ion nuclear magnetic resonance test of the saturated manganese chloride solution shale sample, the T2 spectrum curve of the saturated manganese chloride solution shale sample is obtained;

[0029] Based on the ion NMR test results of dry shale samples, the T2 spectrum curve area of ​​water-saturated shale samples, the T2 spectrum curve of oil-saturated shale samples, and the T2 spectrum curve of saturated manganese chloride solution shale samples were inverted;

[0030] Based on the inversion results, the T2 spectrum curve of water coexistence simulation is obtained.

[0031] A third object of the present invention is to provide an electronic device, the electronic device comprising: a processor, the processor being coupled to a memory;

[0032] The memory is used to store computer programs;

[0033] The processor is used to execute the computer program stored in the memory so that the electronic device executes the method as described above.

[0034] A fourth object of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium includes a program or an instruction, and when the program or the instruction is executed on a computer, the computer executes the method as claimed in any one of claims 1 to 4.

[0035] Beneficial effects of the present invention:

[0036] The quantitative evaluation method and system for shale oil and water storage capacity provided by the present invention are used to measure the hydrogen ion nuclear magnetic resonance signal response characteristics (i.e., T2 spectra) under different shale oil and water conditions, determine the enrichment capacity of the connected pore space in the shale for oil and water media, and use the volume conversion parameter K to convert the T2 spectrum curves under different conditions (saturated oil and oil and water coexistence state) into T2 spectrum curves related to the liquid volume inside the sample. Based on the radial data analysis of the converted T2 spectrum curve, the proportion of pores with different oil and water storage capacity inside the shale is obtained, thereby evaluating the oil and water storage capacity inside the shale; and the present invention has the following effects:

[0037] The present invention adopts the volume conversion parameter K conversion method to characterize the absorption and storage capacity of oil and water media in the pores of the shale. This method is not affected by external characterization conditions and human factors, and the evaluation results are more scientific and objective.

[0038] The quantitative characterization of shale oil and water storage capacity has been achieved. Combined with the actual oil and water absorption capacity and the chart, the proportion of different pore spaces in shale has been quantitatively characterized, which has innovative significance for the in-depth study of shale oil and water storage capacity.

[0039] The adsorption capacity of shale pore space for oil and water and its reservoir characteristics are scientifically calculated, which has a good guiding significance for actual mining;

[0040] Compared with the existing evaluation methods, the evaluation parameters of the method of the present invention are easier to obtain, the calculation process is relatively simple, and the evaluation scope of shale oil and water storage capacity is more comprehensive, and the evaluation results are more accurate and more instructive;

[0041] The invention has simple operation, clear principle, accurate result, easy implementation and can be promoted on a large scale.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A flow chart of a quantitative evaluation method for shale oil and water storage capacity according to an embodiment of the present invention is shown;

[0045] Figure 2 The T2 spectrum curve of the saturated oil shale sample before isovolumetric conversion and the T2 spectrum curve of the oil-water coexistence simulation according to an embodiment of the present invention are shown;

[0046] Figure 3 The T2 spectrum curve of the saturated oil shale sample after conversion according to an embodiment of the present invention and the T2 spectrum curve of the oil-water coexistence simulation after conversion are shown;

[0047] Figure 4 A framework diagram of a method and system for quantitatively evaluating shale oil and water storage capacity according to an embodiment of the present invention is shown;

[0048] Figure 5 A framework diagram of an electronic device according to an embodiment of the present invention is shown;

[0049] In the figure:

[0050] Conversion parameter module 1; conversion curve module 2; evaluation module 3; processor 301; memory 302. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] like Figure 1 As shown, a quantitative evaluation method for shale oil and water storage capacity according to an embodiment of the present invention includes:

[0053] Step S1, obtaining a volume conversion parameter based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the area of ​​the T2 spectrum curve of the water-saturated shale sample, and the area of ​​the T2 spectrum curve of the oil-saturated shale sample;

[0054] Step S2, based on the volume conversion parameter, respectively performing equal volume water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation;

[0055] Step S3: Based on the equal volume water conversion results, the shale oil and water storage capacity evaluation is completed.

[0056] In step S1, the volume conversion parameters are obtained based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the area of ​​the T2 spectrum curve of the water-saturated shale sample, and the area of ​​the T2 spectrum curve of the oil-saturated shale sample, including:

[0057] For example, the size of the shale sample in the embodiment of the present invention is a cylinder with a length of 2 cm and a diameter of 25 mm;

[0058] The shale sample is dried and the dry weight of the shale sample is weighed. For example, the drying condition is 100° C. in a drying oven for 48 hours to remove the moisture inside the shale sample. The dry weight of the shale sample is m0.

[0059] The dried shale samples were subjected to hydrogen ion nuclear magnetic resonance testing to obtain the first T2 spectrum signal of the dried shale samples;

[0060] The dried shale sample is placed in a vacuum saturation device, and vacuumed. Then, the dried shale sample is immersed in distilled water under a vacuum environment and saturated with water for 24 hours at a pressure of 10 MP to obtain a saturated shale sample;

[0061] Weigh the water-saturated shale sample to obtain m1;

[0062] Perform hydrogen ion nuclear magnetic resonance test (hydrogen ion nuclear magnetic resonance test) on the water-saturated shale sample to obtain the T2 spectrum curve of the water-saturated shale sample, and calculate the T2 spectrum curve S1 of the water-saturated shale sample;

[0063] The water-saturated shale sample obtained above is placed in a vacuum drying oven for drying to obtain a dry shale sample;

[0064] The dry shale sample is tested again by hydrogen ion nuclear magnetic resonance to obtain the second T2 spectrum signal of the dry shale sample;

[0065] The dry shale sample was placed in a vacuum saturation device, and vacuum was drawn. Then, the sample was immersed in saturated n-dodecane under vacuum environment and subjected to saturated oil absorption at 10 MP pressure for 24 hours to obtain a saturated oil shale sample.

[0066] Weigh the saturated oil shale sample to obtain m2;

[0067] Perform hydrogen ion nuclear magnetic resonance testing on the saturated oil shale sample to obtain the T2 spectrum curve of the saturated oil shale sample, and calculate the T2 spectrum curve S2 of the saturated oil shale sample;

[0068] According to the calculation formula (1), the volume conversion parameter is obtained:

[0069]

[0070] In formula (1), K is the volume conversion parameter, ρ1 is the density of water, ρ2 is the density of oil, m0 is the dry weight of the shale sample, m1 is the weight of the water-saturated shale sample, m2 is the weight of the oil-saturated shale sample, S1 is the T2 spectrum curve area of ​​the water-saturated shale sample, and S2 is the T2 spectrum curve area of ​​the oil-saturated shale sample.

[0071] In step S2, based on the volume conversion parameter, the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation are respectively converted into equal volume water;

[0072] The T2 spectrum curve of the oil-water coexistence simulation is obtained by the following steps:

[0073] The dried shale sample is placed in a vacuum saturation device, and vacuum is drawn. Then, the dried shale sample is immersed in a saturated manganese chloride solution under a vacuum environment to perform saturated water absorption at 10MP pressure for 24 hours (research has shown that manganese chloride can eliminate the nuclear magnetic resonance reaction signal of water and is insoluble in n-dodecane, so the raw material for simulating the coexistence of oil and water is selected), and a saturated manganese chloride solution shale sample is obtained;

[0074] Weigh the weight m3 of the shale sample of saturated manganese chloride solution;

[0075] The saturated manganese chloride shale solution rock sample is subjected to hydrogen ion nuclear magnetic resonance testing to obtain the T2 spectrum curve of the saturated manganese chloride shale solution rock sample;

[0076] Compare the T2 spectrum signals of the shale samples dried for the first time and the second time to see if they are consistent;

[0077] After confirming the consistency, for the other three T2 spectrum signals (T2 spectrum of saturated water shale sample, T2 spectrum of saturated oil shale sample and T2 spectrum of saturated manganese chloride shale solution rock sample), any signal from the T2 spectrum of the first drying shale sample and the T2 spectrum of the second drying shale sample was selected as the base signal of the T2 spectrum, and the preliminary experimental results were obtained by inversion;

[0078] If not, step S1 is repeated until the T2 spectrum signals of the first and second drying shale samples are obtained;

[0079] Based on the volume conversion parameters, the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation are respectively converted with equal volume of water to obtain the converted T2 spectrum curve of the saturated oil shale sample and the converted T2 spectrum curve of the oil-water coexistence simulation. For details, see Figure 2 and Figure 3 ,in, Figure 2 The T2 spectrum curve of the saturated oil shale sample before equal volume conversion and the T2 spectrum curve of the oil-water coexistence simulation are shown in Figure 2. Figure 3 The T2 spectrum curve of the saturated oil shale sample after conversion and the T2 spectrum curve of the oil-water coexistence simulation after conversion. Figure 2 and Figure 3 The T2 spectrum curves of water-saturated shale samples are also contained in them.

[0080] In step S3, the shale oil and water storage capacity evaluation is completed based on the equal volume water conversion result, including:

[0081] The T2 spectrum curve of the converted saturated oil shale sample and the T2 spectrum curve of the converted oil-water coexistence simulation are integrated to calculate the integral area of ​​the T2 spectrum curve of the converted saturated oil shale sample as S2' and the integral area of ​​the T2 spectrum curve of the converted oil-water coexistence simulation as S3'.

[0082] Comparing the relationship between the T2 spectrum curve areas S1, S2' and S3' of the water-saturated shale sample, the following comparison results are obtained:

[0083] Result ①: S2'=0, or S3'=0, or S1 is much greater than S2'-S3';

[0084] Result ②: None of the above;

[0085] The evaluation results of shale oil and water storage capacity obtained based on the comparison results are as follows:

[0086] When the comparison result is result ①, the shale oil and water storage capacity is good in water wettability and extremely poor in oil storage capacity;

[0087] When the comparison result is result ②, the shale pore space is divided into three categories: water-collecting pores (good water wettability, cannot store oil), oil-water collecting pores (oil and water can be converted into each other), and oil-collecting pores (poor water wettability, cannot store water). The three pore types are quantified according to the relationship between S1, S2' and S3', which are samples S1 / (S1+S3'), S2 / (S1+S3'), and S3' / (S1+S3').

[0088] like Figure 4 As shown, in certain embodiments of the present invention, a quantitative evaluation system for shale oil and water storage capacity is also provided, the evaluation system comprising:

[0089] The conversion parameter module 1 is used to obtain the volume conversion parameter based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the area of ​​the T2 spectrum curve of the water-saturated shale sample and the area of ​​the T2 spectrum curve of the oil-saturated shale sample;

[0090] The conversion curve module 2 is used to perform equal volume water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation respectively based on the volume conversion parameter;

[0091] Evaluation module 3 is used to complete the evaluation of shale oil and water storage capacity based on the equal volume water conversion results.

[0092] In an embodiment of the present invention, the evaluation system further includes a test module;

[0093] The test module is used to perform a vacuum saturated water test, a vacuum saturated oil test and a vacuum saturated manganese chloride solution test on dry shale samples respectively, and the vacuum conditions in the vacuum saturated water test, the vacuum saturated oil test and the vacuum saturated manganese chloride solution test are the same.

[0094] In an embodiment of the present invention, the evaluation system further comprises a hydrogen ion nuclear magnetic resonance testing module;

[0095] The hydrogen ion nuclear magnetic resonance test module is used to perform hydrogen ion nuclear magnetic resonance testing on water-saturated rock samples obtained by vacuum saturated water test, oil-saturated rock samples obtained by vacuum saturated oil test, and saturated manganese chloride solution shale samples.

[0096] In an embodiment of the present invention, the T2 spectrum curve of the water coexistence simulation includes the following steps to obtain:

[0097] A vacuum saturated manganese chloride solution test is performed on the dry shale sample to obtain a saturated manganese chloride solution shale sample;

[0098] Based on the hydrogen ion nuclear magnetic resonance test of the saturated manganese chloride solution shale sample, the T2 spectrum curve of the saturated manganese chloride solution shale sample is obtained;

[0099] Based on the ion NMR test results of dry shale samples, the T2 spectrum curve area of ​​water-saturated shale samples, the T2 spectrum curve of oil-saturated shale samples, and the T2 spectrum curve of saturated manganese chloride solution shale samples were inverted;

[0100] Based on the inversion results, the T2 spectrum curve of water coexistence simulation is obtained.

[0101] like Figure 5 As shown, in some embodiments of the present invention, an electronic device is further provided, the electronic device 300 comprising: a processor 301, the processor 301 being coupled to a memory 302;

[0102] The memory 302 is used to store computer programs;

[0103] The processor 301 is configured to execute the computer program stored in the memory 302 so that the electronic device executes the method in the above embodiment.

[0104] In certain embodiments of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a program or instructions. When the program or instructions are executed on a computer, the computer executes the method described in the above embodiments.

[0105] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable computer-readable storage medium, for example, may include but is not limited to: 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), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an electronic device or a device.

[0106] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quantitative evaluation method for shale oil and water storage capacity, characterized in that: include: Based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the T2 spectrum curve of the water-saturated shale sample, and the T2 spectrum curve of the oil-saturated shale sample, the volume conversion parameter is obtained; Based on the volume conversion parameter, the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation are respectively converted into equal volumes of water; Based on the equal volume water conversion results, the shale oil and water storage capacity evaluation is completed.

2. A quantitative evaluation method for shale oil and water storage capacity according to claim 1, characterized in that: The water-saturated shale sample is obtained by subjecting a dry shale sample to a vacuum water-saturated test, and the oil-saturated shale sample is obtained by subjecting a dry shale sample to a vacuum oil-saturated test. The vacuum conditions in the vacuum water-saturated test and the vacuum oil-saturated test are the same.

3. The quantitative evaluation method for shale oil and water storage capacity according to claim 1, characterized in that: The volume conversion parameter is calculated according to the following formula: Wherein, K is the volume conversion parameter, ρ1 is the density of water, ρ2 is the density of oil, m0 is the dry weight of the shale sample, m1 is the weight of the water-saturated shale sample, m2 is the weight of the oil-saturated shale sample, S1 is the integral area of ​​the T2 spectrum curve of the water-saturated shale sample, and S2 is the integral area of ​​the T2 spectrum curve of the oil-saturated shale sample.

4. A quantitative evaluation method for shale oil and water storage capacity according to any one of claims 1 to 3, characterized in that: The T2 spectrum curve of the oil-water coexistence simulation, The steps include: A vacuum saturated manganese chloride solution test is performed on the dry shale sample to obtain a saturated manganese chloride solution shale sample; Based on the hydrogen ion nuclear magnetic resonance test of the saturated manganese chloride solution shale sample, the T2 spectrum curve of the saturated manganese chloride solution shale sample is obtained; Based on the ion NMR test results of dry shale samples, the T2 spectrum curve area of ​​water-saturated shale samples, the T2 spectrum curve of oil-saturated shale samples, and the T2 spectrum curve of saturated manganese chloride solution shale samples were inverted; Based on the inversion results, the T2 spectrum curve of water coexistence simulation is obtained.

5. A quantitative evaluation system for shale oil and water storage capacity, characterized in that: include: The conversion parameter module is used to obtain volume conversion parameters based on the dry weight of the shale sample, the weight of the water-saturated shale sample, the weight of the oil-saturated shale sample, the area of ​​the T2 spectrum curve of the water-saturated shale sample, and the area of ​​the T2 spectrum curve of the oil-saturated shale sample; The conversion curve module is used to perform equal volume water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation respectively based on the volume conversion parameter; The evaluation module is used to complete the evaluation of shale oil and water storage capacity based on the equal volume water conversion results.

6. A shale oil and water storage capacity quantitative evaluation system according to claim 5, characterized in that: Also includes a trial module; The test module is used to perform a vacuum saturated water test, a vacuum saturated oil test and a vacuum saturated manganese chloride solution test on dry shale samples respectively, and the vacuum conditions in the vacuum saturated water test, the vacuum saturated oil test and the vacuum saturated manganese chloride solution test are the same.

7. A shale oil and water storage capacity quantitative evaluation system according to claim 6, characterized in that: It also includes a hydrogen ion nuclear magnetic test module; The hydrogen ion nuclear magnetic resonance test module is used to perform hydrogen ion nuclear magnetic resonance testing on water-saturated rock samples obtained by vacuum saturated water test, oil-saturated rock samples obtained by vacuum saturated oil test, and saturated manganese chloride solution shale samples.

8. A shale oil and water storage capacity quantitative evaluation system according to any one of claims 6-7, characterized in that: The T2 spectrum curve of the water coexistence simulation, The steps include: A vacuum saturated manganese chloride solution test is performed on the dry shale sample to obtain a saturated manganese chloride solution shale sample; Based on the hydrogen ion nuclear magnetic resonance test of the saturated manganese chloride solution shale sample, the T2 spectrum curve of the saturated manganese chloride solution shale sample is obtained; Based on the ion NMR test results of dry shale samples, the T2 spectrum curve area of ​​water-saturated shale samples, the T2 spectrum curve of oil-saturated shale samples, and the T2 spectrum curve of saturated manganese chloride solution shale samples were inverted; Based on the inversion results, the T2 spectrum curve of water coexistence simulation is obtained.

9. An electronic device, characterized in that: include: a processor coupled to the memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory, so that the electronic device executes the method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a program or an instruction. When the program or the instruction is executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 4.

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