Pore ​​development characterization method, device, electronic device and storage medium

Abstract

The present invention provides a method, device, electronic device and storage medium for characterizing pore development characteristics, the method comprising: constructing a rock physics model of a shale reservoir, the rock physics model comprising a bedding fracture layer, an organic layer, a clay mineral layer and a brittle mineral layer arranged in sequence from bottom to top; randomly obtaining at least three shale samples, and determining the first microscopic pore volume of the organic layer, the second microscopic pore volume of the clay mineral layer and the third microscopic pore volume of the brittle mineral layer according to the at least three shale samples; determining the first porosity of the organic layer based on the first microscopic pore volume; determining the second porosity of the clay mineral layer based on the second microscopic pore volume; and determining the third porosity of the brittle mineral layer based on the third microscopic pore volume. The present invention effectively characterizes the porosity in the organic layer, the clay mineral layer and the brittle mineral layer, thereby providing a guarantee for oil and gas exploration and development in shale reservoirs.

Description

Technical Field

[0001] The present invention relates to the technical field of pore development feature characterization, and in particular to a pore development feature characterization method, device, electronic equipment and storage medium. Background Art

[0002] In response to the world's energy security and rapid economic development needs, the exploration and development of unconventional oil and gas resources has become a major focus of the country's energy development strategy. Shale oil and gas exploration and development have made major breakthroughs and progress, becoming an important force in responding to energy challenges. Shale oil and gas resources are mainly stored in pore space. The study of shale reservoir pore system is extremely important. The classification and quantitative characterization of pore types are the key to the effective evaluation of shale reservoirs and are important indicators affecting shale oil and gas exploration and development.

[0003] The types of pores developed in shale reservoirs are relatively complex, with various shapes, structures, and spatial distributions. According to their development locations, they can be divided into clay mineral pores, brittle mineral pores, organic pores, and microcracks. Whether it is the currently widely used direct observation method of scanning electron microscopy or the flow injection technology including N2 / CO2 adsorption-desorption experiment and high-pressure mercury injection experiment, they are all qualitative and quantitative characterizations of the overall pore development characteristics, and cannot conduct targeted analysis and characterization of the development characteristics of different types of pores. The characterization is not detailed enough, resulting in the inability to effectively analyze the pore development characteristics of shale reservoirs. Summary of the invention

[0004] In view of this, it is necessary to provide a pore development characteristic characterization method, device, electronic device and storage medium to solve the technical problem that the prior art cannot characterize and analyze the development characteristics of different types of pores, resulting in the inability to effectively analyze the pore development characteristics of shale reservoirs.

[0005] In order to solve the above technical problems, the present invention provides a method for characterizing pore development characteristics, comprising:

[0006] Constructing a rock physics model of a shale reservoir, wherein the rock physics model includes a bedding fracture layer, an organic matter layer, a clay mineral layer, and a brittle mineral layer arranged in sequence from bottom to top;

[0007] randomly obtaining at least three shale samples, and determining a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples;

[0008] determining a first porosity of the organic layer based on the first microscopic pore volume;

[0009] determining a second porosity of the clay mineral layer based on the second microscopic pore volume;

[0010] A third porosity of the brittle mineral layer is determined based on the third microscopic pore volume.

[0011] In a possible implementation, determining the first microscopic pore volume of the organic layer, the second microscopic pore volume of the clay mineral layer, and the third microscopic pore volume of the brittle mineral layer according to the at least three shale samples includes:

[0012] According to the at least three shale samples, at least three first mass percentages of the organic matter layer, at least three second mass percentages of the clay mineral layer, and at least three third mass percentages of the brittle mineral layer are respectively obtained;

[0013] Obtain at least three total porosities of samples based on the at least three shale samples;

[0014] The first micropore volume, the second micropore volume and the third micropore volume are determined based on the density of the shale reservoir, the total porosity of the at least three samples, the microfracture porosity of the bedding fracture layer, the at least three first mass percentages, the at least three second mass percentages and the at least three third percentages.

[0015] In a possible implementation, each of the at least three shale samples includes a first sub-shale sample and a second sub-shale sample; and obtaining at least three first mass percentages of the organic matter layer, at least three second mass percentages of the clay mineral layer, and at least three third mass percentages of the brittle mineral layer according to the at least three shale samples includes:

[0016] Obtaining the second mass percentage and the third mass percentage according to the first sub-shale sample;

[0017] The first mass percentage is obtained according to the second sub-shale sample.

[0018] In a possible implementation, the first sub-shale sample includes a plurality of first shale particles, and the particle size of the first shale particles is 200 mesh.

[0019] In a possible implementation, the second sub-shale sample includes a plurality of second shale particles, and the particle size of the second shale particles is 0.05 mm-0.2 mm.

[0020] In a possible implementation, the first porosity is:

[0021]

[0022] The second porosity is:

[0023]

[0024] The third porosity is:

[0025]

[0026] Where ρ is the density of shale reservoir; A TOC A is the first mass percentage; Clay is the second mass percentage; A Bri is the third mass percentage; V TOC is the first microscopic pore volume; V Clay is the second microscopic pore volume; A Bri It is the third microscopic pore volume.

[0027] In a possible implementation manner, after determining the third porosity of the brittle mineral layer based on the third microscopic pore volume, the method further includes:

[0028] obtaining a verification sample, and determining the first porosity, the second porosity, and the third porosity according to the verification sample;

[0029] determining a theoretical total porosity of the verification sample based on the first porosity, the second porosity, and the third porosity;

[0030] Obtaining the true total porosity of the verification sample;

[0031] The accuracy of the first porosity, the second porosity, and the third porosity is evaluated based on the theoretical total porosity and the true total porosity.

[0032] On the other hand, the present invention also provides a pore development feature characterization device, comprising:

[0033] A physical model building unit, used to build a rock physical model of the shale reservoir, wherein the rock physical model includes a bedding fracture layer, an organic matter layer, a clay mineral layer and a brittle mineral layer arranged in sequence from bottom to top;

[0034] A parameter acquisition unit, used for randomly acquiring at least three shale samples, and determining a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples;

[0035] A first porosity determination unit, configured to determine a first porosity of the organic layer based on the first microscopic pore volume;

[0036] a second porosity determination unit, configured to determine a second porosity of the clay mineral layer based on the second microscopic pore volume;

[0037] A third porosity determination unit is used to determine a third porosity of the brittle mineral layer based on the third microscopic pore volume.

[0038] On the other hand, the present invention also provides an electronic device, including a memory and a processor, wherein:

[0039] The memory is used to store programs;

[0040] The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps in the pore development feature characterization method in any one of the above implementations.

[0041] The present invention also provides a computer-readable storage medium for storing computer-readable programs or instructions. When the program or instructions are executed by a processor, the steps in the pore development feature characterization method in any of the above-mentioned implementation modes can be implemented.

[0042] The beneficial effect of adopting the above embodiment is that the pore development characteristic characterization method provided by the present invention constructs a rock physical model of a shale reservoir including a bedding fracture layer, an organic layer, a clay mineral layer and a brittle mineral layer, and conducts a qualitative analysis of different types of pores in the shale reservoir, and then determines the first microscopic pore volume of the organic layer, the second microscopic pore volume of the clay mineral layer and the third microscopic pore volume of the brittle mineral layer according to at least three shale samples, and respectively determines the first porosity of the organic layer, the second porosity of the clay mineral layer and the third porosity of the brittle mineral layer based on the first microscopic pore volume, the second microscopic pore volume and the third microscopic pore volume, and quantitatively analyzes different types of pores in the shale reservoir through the first porosity, the second porosity and the third porosity, so as to achieve an effective characterization and analysis of the pore development characteristics of the shale reservoir. By conducting quantitative and qualitative analysis on the pore development characteristics of the shale reservoir, the precision of the characterization of the pore development characteristics is improved, thereby providing a guarantee for the oil and gas exploration and development of the shale reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 A schematic diagram of an embodiment of the pore development characterization method provided by the present invention;

[0045] Figure 2 A schematic diagram of the structure of an embodiment of a rock physics model of a shale reservoir provided by the present invention;

[0046] Figure 3 For the present invention Figure 1 A schematic flow chart of an embodiment of S102;

[0047] Figure 4 For the present invention Figure 3 A schematic flow chart of an embodiment of S301;

[0048] Figure 5 A schematic diagram of an embodiment of the present invention for evaluating the accuracy of the first porosity, the second porosity and the third porosity;

[0049] Figure 6 A comparison chart of the theoretical total porosity and the actual total porosity provided by the present invention;

[0050] Figure 7 A schematic diagram of the structure of an embodiment of a pore development feature characterization device provided by the present invention;

[0051] Figure 8 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0053] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist at the same time, and B exists alone.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] The present invention provides a method, device, electronic device and storage medium for characterizing pore development characteristics, which are respectively described below.

[0056] Before presenting the embodiments, the characterization of pore development characteristics is first described. In the present invention, the characterization of pore development characteristics refers to the qualitative analysis of pore types and the quantitative analysis of porosity.

[0057] Figure 1 A schematic flow chart of an embodiment of the pore development characterization method provided by the present invention is as follows: Figure 1 As shown, the method includes:

[0058] S101, constructing a rock physics model of the shale reservoir, wherein the rock physics model includes a bedding fracture layer, an organic matter layer, a clay mineral layer, and a brittle mineral layer arranged in sequence from bottom to top;

[0059] S102, randomly obtaining at least three shale samples, and determining a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples;

[0060] S103, determining a first porosity of the organic layer based on the first microscopic pore volume;

[0061] S104, determining a second porosity of the clay mineral layer based on the second microscopic pore volume;

[0062] S105. Determine a third porosity of the brittle mineral layer based on the third microscopic pore volume.

[0063] Compared with the prior art, the pore development characteristic characterization method provided in the embodiment of the present invention constructs a rock physics model of a shale reservoir including a bedding fracture layer, an organic matter layer, a clay mineral layer and a brittle mineral layer, conducts a qualitative analysis of the shale reservoir, and then determines the first microscopic pore volume of the organic matter layer, the second microscopic pore volume of the clay mineral layer and the third microscopic pore volume of the brittle mineral layer according to at least three shale samples, and respectively determines the first porosity of the organic matter layer, the second porosity of the clay mineral layer and the third porosity of the brittle mineral layer based on the first microscopic pore volume, the second microscopic pore volume and the third microscopic pore volume, and quantitatively analyzes different types of pores in the shale reservoir through the first porosity, the second porosity and the third porosity, thereby achieving effective characterization and analysis of the pore development characteristics of the shale reservoir. By quantitatively and qualitatively analyzing the pore development characteristics of the shale reservoir, the precision of the characterization of the pore development characteristics is improved, thereby providing a guarantee for the oil and gas exploration and development of the shale reservoir.

[0064] In some embodiments of the present invention, Figure 2As shown, the rock physics model 10 specifically includes a bedding fracture layer 100, an organic layer 200, a clay mineral layer 300 and a brittle mineral layer 400, which are arranged in sequence from bottom to top, and the organic layer, the clay mineral layer 300 and the brittle mineral layer 400 all include pores. For ease of understanding, the pores and the matrix are represented in layers. Specifically, the organic layer 200 includes an organic matrix 210 and organic pores 220, the clay mineral layer 300 includes a clay mineral matrix 310 and clay mineral pores 320, and the brittle mineral layer 400 includes a brittle mineral matrix 410 and brittle mineral pores 420.

[0065] Furthermore, the construction and implementation of the pore development characterization method provided in the embodiment of the present invention can provide scientific support, theoretical basis and methodological guidance for the detailed evaluation of shale reservoirs, effective porosity analysis and accurate assessment of shale oil and gas resources.

[0066] In some embodiments of the present invention, Figure 3 As shown, step S102 includes:

[0067] S301, obtaining at least three first mass percentages of the organic matter layer, at least three second mass percentages of the clay mineral layer, and at least three third mass percentages of the brittle mineral layer according to at least three shale samples;

[0068] S302, obtaining at least three total porosities of samples according to at least three shale samples;

[0069] S303. Determine a first microscopic pore volume, a second microscopic pore volume, and a third microscopic pore volume according to the density of the shale reservoir, the total porosity of at least three samples, the microfracture porosity of the bedding fracture layer, at least three first mass percentages, at least three second mass percentages, and at least three third mass percentages.

[0070] In one embodiment of the present invention, the first microscopic pore volume, the second microscopic pore volume and the third microscopic pore volume are obtained by calculation formulas.

[0071] Specifically, the calculation formula is:

[0072]

[0073]

[0074] In the formula, Total porosity of the sample; is the matrix porosity; is the porosity of microfractures; ρ is the density of shale reservoir; A TOC A is the first mass percentage; Clay is the second mass percentage; A Briis the third mass percentage; V TOC is the first microscopic pore volume; V Clay is the second microscopic pore volume; A Bri It is the third microscopic pore volume.

[0075] It can be seen from the above calculation formula that the specific process of step S303 is: put the density of the shale reservoir, the total porosity of at least three samples, the micro-fracture porosity of the bedding fracture layer, at least three first mass percentages, at least three second mass percentages and at least three third percentages into the calculation formula, establish a three-variable linear equation group, and obtain the first microscopic pore volume, the second microscopic pore volume and the third microscopic pore volume by solving the equation group.

[0076] In some embodiments of the present invention, the first porosity is:

[0077]

[0078] The second porosity is:

[0079]

[0080] The third porosity is:

[0081]

[0082] It can be known from the above formula that the first porosity, the second porosity and the third porosity can be obtained correspondingly by obtaining the first microscopic pore volume, the second microscopic pore volume and the third microscopic pore volume.

[0083] In some embodiments of the present invention, each of the at least three shale samples includes a first sub-shale sample and a second sub-shale sample; Figure 4 As shown, step S301 includes:

[0084] S401, obtaining a second mass percentage and a third mass percentage according to the first sub-shale sample;

[0085] S402. Obtain a first mass percentage content according to the second sub-shale sample.

[0086] In one embodiment of the present invention, step S401 is specifically as follows: using a fully automatic powder X-ray diffractometer to carry out a mineral analysis experiment, the experimental conditions are using a Cu target, a rotation angle of 3° to 70°, a rotation speed of 4° / min, Kα rays, a step of 0.02, a tube pressure power of 40Kv, and a tube flow of 150mA. The XRD diffraction spectrum of the first sub-shale sample can be obtained by computer analysis, and the spectrum is analyzed according to standard powder diffraction analysis data to obtain the second mass percentage and the third mass percentage of the first sub-shale sample.

[0087] In one embodiment of the present invention, since the second sub-shale sample cannot be directly placed in the rock pyrolysis analyzer, it needs to be deacidified and dehydrated. Therefore, step S402 is specifically as follows: collect the second sub-shale sample into a clean glass container with a suitable sealing foil to prevent organic matter from contaminating the sample. The deacidification process is to use 10% (volume ratio) hydrochloric acid to remove carbonates, and the process is carried out in a 60°C hot bath environment; the dehydration process is to wash the deacidified second sub-shale sample with distilled water to remove residual hydrochloric acid, and then dry it in a vacuum environment for 24 hours. After the second sub-shale sample is dried, the rock pyrolysis analyzer is used to perform pyrolysis analysis on these second sub-shale samples. The thermal extraction pyrolysis system is the main working system of the rock pyrolysis analyzer. This system has a wide detection range and high sensitivity, and can detect samples of 10-13 mg / g. The internal intelligent control program can automatically heat up the pyrolysis furnace, and the temperature in the pyrolysis furnace can be increased to 400-700°C; the third mass percentage of the second sub-shale sample can be obtained through computer data processing.

[0088] In some embodiments of the present invention, the first sub-shale sample includes a plurality of first shale particles, and the particle size of the first shale particles is 200 mesh.

[0089] Specifically, firstly, a large piece of shale is crushed by a crusher to obtain a crushed sample, and then about 10 g of the crushed sample is taken and placed in a mortar for grinding to screen out a plurality of first shale particles.

[0090] In some embodiments of the present invention, the second sub-shale sample includes a plurality of second shale particles, and the particle size of the second shale particles is 0.05 mm-0.2 mm.

[0091] Specifically, firstly, a large piece of shale is crushed by a crusher to obtain a crushed sample, and then the crushed sample is pulverized to screen out a plurality of second shale particles.

[0092] Further, in order to ensure the accuracy of the first porosity, the second porosity and the third porosity, in some embodiments of the present invention, Figure 5 As shown, after step S105, the accuracy of the first porosity, the second porosity and the third porosity is also evaluated, specifically:

[0093] S501, obtaining a verification sample, and determining a first porosity, a second porosity, and a third porosity according to the verification sample;

[0094] S502, determining the theoretical total porosity of the verification sample according to the first porosity, the second porosity and the third porosity;

[0095] S503, obtaining the true total porosity of the verification sample;

[0096] S504. Evaluate the accuracy of the first porosity, the second porosity, and the third porosity according to the theoretical total porosity and the true total porosity.

[0097] Specifically, when the difference between the theoretical total porosity and the true total porosity is greater than or equal to the threshold difference, it means that the accuracy of the first porosity, the second porosity and the third porosity is not high, and the first porosity, the second porosity and the third porosity need to be re-determined. When the difference between the theoretical total porosity and the true total porosity is less than the threshold difference, it means that the accuracy of the first porosity, the second porosity and the third porosity is high, that is, the first porosity, the second porosity and the third porosity can be used to characterize the pore development characteristics of the shale reservoir.

[0098] In some embodiments of the present invention, in step S503, the GRI (Gas Research Institute) method is specifically used to obtain the true total porosity of the verification sample. In the GRI method, the specification of the verification sample needs to be a cylinder with a diameter of 1.0 cm and a height of about 2.5 cm. Therefore, in step S501, it is necessary to perform wire cutting on the block shale sample to obtain the test sample. The specification of the test sample is a cylinder with a diameter of 1.0 cm and a height of about 2.5 cm.

[0099] In a specific embodiment of the present invention, step S503 is: using a QKY-ZN porosity analyzer, the diameter of helium molecules is relatively small, about 0.2nm, and can fill all pores in the verification sample. External pressure needs to be increased to allow it to enter the shale pores. This link is measured at a pore pressure of 200psi and a confining pressure of 1000psi (6.89MPa), with an accuracy of ±0.1%. A pulse decay permeameter (PDP-200) is used to analyze the permeability under nitrogen conditions with a pore pressure of 600psi, a confining pressure of 1000psi (6.89MPa). The accuracy of the pressure sensor is ±0.1% of the full scale. The true total porosity of the verification sample can be obtained through the above settings.

[0100] In one embodiment of the present invention, Figure 6 As shown in the figure, there is a significant positive linear relationship between the theoretical total porosity and the actual total porosity, and the fitting coefficient R 2 It is 0.910, indicating that the first porosity, the second porosity and the third porosity have good reliability and accuracy.

[0101] In order to better implement the pore development characteristic characterization method in the embodiment of the present invention, based on the pore development characteristic characterization method, correspondingly, Figure 7 As shown, the embodiment of the present invention further provides a pore development feature characterization device 700, comprising:

[0102] A physical model building unit 701 is used to build a rock physical model of the shale reservoir, wherein the rock physical model includes a bedding fracture layer, an organic matter layer, a clay mineral layer and a brittle mineral layer arranged in sequence from bottom to top;

[0103] A parameter acquisition unit 702 is used to randomly acquire at least three shale samples, and determine a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples;

[0104] A first porosity determination unit 703, for determining a first porosity of the organic layer based on a first microscopic pore volume;

[0105] A second porosity determination unit 704, for determining a second porosity of the clay mineral layer based on a second microscopic pore volume;

[0106] The third porosity determination unit 705 is used to determine the third porosity of the brittle mineral layer based on the third microscopic pore volume.

[0107] The pore development characteristic characterization device 700 provided in the above embodiment can implement the technical solution described in the above pore development characteristic characterization method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above pore development characteristic characterization method embodiment, which will not be repeated here.

[0108] like Figure 8 As shown, the present invention also provides an electronic device 800. The electronic device 800 includes a processor 801, a memory 802 and a display 803. Figure 8 Only some components of the electronic device 800 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0109] In some embodiments, the memory 802 may be an internal storage unit of the electronic device 800, such as a hard disk or memory of the electronic device 800. In other embodiments, the memory 802 may also be an external storage device of the electronic device 800, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 800.

[0110] Furthermore, the memory 802 may include both an internal storage unit of the electronic device 800 and an external storage device. The memory 802 is used to store application software installed in the electronic device 800 and various data.

[0111] In some embodiments, the processor 801 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 802, such as the pore development feature characterization method of the present invention.

[0112] In some embodiments, the display 803 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 803 is used to display information on the electronic device 800 and to display a visual user interface. The components 801-803 of the electronic device 800 communicate with each other via a system bus.

[0113] In one embodiment, when the processor 801 executes the pore development characterization program in the memory 802, the following steps may be implemented:

[0114] Constructing a rock physics model of the shale reservoir, the rock physics model includes a bedding fracture layer, an organic matter layer, a clay mineral layer and a brittle mineral layer arranged in sequence from bottom to top;

[0115] randomly obtaining at least three shale samples, and determining a first microscopic pore volume of an organic matter layer, a second microscopic pore volume of a clay mineral layer, and a third microscopic pore volume of a brittle mineral layer based on the at least three shale samples;

[0116] determining a first porosity of the organic layer based on the first microscopic pore volume;

[0117] determining a second porosity of the clay mineral layer based on the second microscopic pore volume;

[0118] A third porosity of the brittle mineral layer is determined based on the third microscopic pore volume.

[0119] It should be understood that: when the processor 801 executes the pore development characterization program in the memory 802, in addition to the above functions, other functions can also be realized. For details, please refer to the description of the corresponding method embodiment above.

[0120] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 800 mentioned, and the electronic device 800 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic devices may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 800 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0121] Accordingly, an embodiment of the present application also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, the method steps or functions provided by the above-mentioned method embodiments can be implemented.

[0122] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0123] The pore development characteristic characterization method, device, electronic device and storage medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for characterizing pore development characteristics, characterized in that: include: Constructing a rock physics model of a shale reservoir, wherein the rock physics model includes a bedding fracture layer, an organic matter layer, a clay mineral layer, and a brittle mineral layer arranged in sequence from bottom to top; randomly obtaining at least three shale samples, and determining a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples; determining a first porosity of the organic layer based on the first microscopic pore volume; determining a second porosity of the clay mineral layer based on the second microscopic pore volume; determining a third porosity of the brittle mineral layer based on the third microscopic pore volume; The determining of the first microscopic pore volume of the organic layer, the second microscopic pore volume of the clay mineral layer, and the third microscopic pore volume of the brittle mineral layer according to the at least three shale samples comprises: According to the at least three shale samples, at least three first mass percentages of the organic matter layer, at least three second mass percentages of the clay mineral layer, and at least three third mass percentages of the brittle mineral layer are respectively obtained; Obtain at least three total porosities of samples based on the at least three shale samples; Determining the first microscopic pore volume, the second microscopic pore volume, and the third microscopic pore volume according to the density of the shale reservoir, the total porosity of the at least three samples, the microfracture porosity of the bedding fracture layer, the at least three first mass percentages, the at least three second mass percentages, and the at least three third mass percentages; Each of the at least three shale samples includes a first sub-shale sample and a second sub-shale sample; and obtaining at least three first mass percentages of the organic layer, at least three second mass percentages of the clay mineral layer, and at least three third mass percentages of the brittle mineral layer respectively according to the at least three shale samples includes: Obtaining the second mass percentage and the third mass percentage according to the first sub-shale sample; Among them, a fully automatic powder X-ray diffractometer was used to carry out mineral analysis experiments. The experimental conditions were: a Cu target, a rotation angle of 3° to 70°, a rotation speed of 4° / min, Kα rays, a step of 0.02, a tube pressure power of 40Kv, and a tube flow of 150mA. The XRD diffraction pattern of the first sub-shale sample was obtained by computer analysis, and the pattern was analyzed according to standard powder diffraction analysis data to obtain the second mass percentage and the third mass percentage of the first sub-shale sample; Obtaining the first mass percentage according to the second sub-shale sample; The second sub-shale sample is collected into a clean glass container with a suitable sealing foil to prevent organic matter from contaminating the sample. The deacidification process is to remove carbonates using hydrochloric acid with a volume ratio of 10%, and the process is carried out in a 60°C hot bath environment. The dehydration process is to wash the deacidified second sub-shale sample with distilled water to remove residual hydrochloric acid, and then dry it in a vacuum environment for 24 hours. After the second sub-shale sample is dried, a rock pyrolysis analyzer is used to perform pyrolysis analysis on the second sub-shale sample, and the thermal extraction pyrolysis system is the working system of the rock pyrolysis analyzer. The first sub-shale sample includes a plurality of first shale particles, and the particle size of the first shale particles is 200 mesh; the second sub-shale sample includes a plurality of second shale particles, and the particle size of the second shale particles is 0.05 mm-0.2 mm; The first porosity is: φ 1 = ρA TOC V TOC The second porosity is: φ 2 = ρA Clay V Clay The third porosity is: φ 3 = ρA Bri V Bri In the formula, ρ is the density of the shale reservoir; A TOC is the first mass percentage; A Clay is the second mass percentage; A Bri is the third mass percentage; V TOC is the first microscopic pore volume; V Clay is the second microscopic pore volume; V Bri It is the third microscopic pore volume.

2. The method for characterizing pore development characteristics according to claim 1, characterized in that: After determining the third porosity of the brittle mineral layer based on the third microscopic pore volume, the method further includes: obtaining a verification sample, and determining the first porosity, the second porosity, and the third porosity according to the verification sample; determining a theoretical total porosity of the verification sample based on the first porosity, the second porosity, and the third porosity; Obtaining the true total porosity of the verification sample; The accuracy of the first porosity, the second porosity, and the third porosity is evaluated based on the theoretical total porosity and the true total porosity.

3. A pore development characterization device, characterized in that: The method for characterizing pore development characteristics according to any one of claims 1 to 2, wherein the device comprises: A physical model building unit, used to build a rock physical model of the shale reservoir, wherein the rock physical model includes a bedding fracture layer, an organic matter layer, a clay mineral layer and a brittle mineral layer arranged in sequence from bottom to top; A parameter acquisition unit, used for randomly acquiring at least three shale samples, and determining a first microscopic pore volume of the organic matter layer, a second microscopic pore volume of the clay mineral layer, and a third microscopic pore volume of the brittle mineral layer according to the at least three shale samples; A first porosity determination unit, configured to determine a first porosity of the organic layer based on the first microscopic pore volume; a second porosity determination unit, configured to determine a second porosity of the clay mineral layer based on the second microscopic pore volume; A third porosity determination unit is used to determine a third porosity of the brittle mineral layer based on the third microscopic pore volume.

4. An electronic device, characterized in that: include: one or more processors; Memory; as well as One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the pore development characterization method described in any one of claims 1-2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is loaded by the processor to execute the steps in the pore development characterization method described in any one of claims 1-2.

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