Carbon dioxide geological storage reserve assessment method, system, equipment and medium

Abstract

The invention discloses a carbon dioxide geological storage reserve assessment method, system and device and a medium, and the method comprises the steps: obtaining the reservoir information of a target reservoir, the reservoir information comprising the reservoir area, the reservoir thickness, the reservoir water saturation and the formation temperature and pressure; acquiring a plurality of cores of the target reservoir; based on a digital core technology, performing multi-scale digital quantitative analysis on each core to obtain the microscopic connected porosity of each core; according to the microscopic connected porosity of each rock core, the microscopic average connected porosity of the target reservoir is obtained; and obtaining the carbon dioxide geological sequestration proved reserves of the target reservoir according to the reservoir information and the microscopic average connected porosity of the target reservoir. According to the method, the total reserves of the carbon dioxide geological sequestration can be evaluated and calculated more accurately.

Description

Technical Field

[0001] The present application relates to the technical field of geological storage of carbon dioxide, and in particular to a method, system, equipment and medium for evaluating the storage capacity of geological storage of carbon dioxide. Background Art

[0002] In the process of geological storage of carbon dioxide, accurate calculation of reserves is crucial to evaluate the storage capacity and injectivity of reservoirs. Existing methods for calculating the storage capacity of carbon dioxide geological storage generally consider important parameters such as the area, thickness, water saturation, and effective porosity of the storage site to calculate reserves, but the method of calculating reserves through effective porosity has errors with the actual reserves of the reservoir. Summary of the invention

[0003] The present application aims to propose a method, device, equipment and medium for evaluating the geological storage capacity of carbon dioxide, which can more accurately evaluate and calculate the overall reserves of geological storage of carbon dioxide.

[0004] The method for assessing the geological storage capacity of carbon dioxide according to the first embodiment of the present application includes:

[0005] Acquire reservoir information of the target reservoir, wherein the reservoir information includes reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure;

[0006] Acquiring multiple cores of the target reservoir;

[0007] Based on digital core technology, a multi-scale digital quantitative analysis is performed on each core to obtain the microscopic connected porosity of each core;

[0008] According to the microscopic connected porosity of each core, obtaining the microscopic average connected porosity of the target reservoir;

[0009] The proven reserves of carbon dioxide geological storage in the target reservoir are obtained according to the reservoir information and the microscopic average connected porosity of the target reservoir.

[0010] According to some embodiments of the present application, obtaining the proven reserves of carbon dioxide geological storage of the target reservoir according to the reservoir information and the micro-average connected porosity of the target reservoir includes:

[0011] Obtaining a supercritical carbon dioxide compression factor of the target reservoir according to the formation temperature and pressure;

[0012] The proven reserves of carbon dioxide geological storage in the target reservoir are obtained according to the reservoir information of the target reservoir, the supercritical carbon dioxide compression factor and the micro-average connected porosity.

[0013] According to some embodiments of the present application, the proven reserves of carbon dioxide geological storage of the target reservoir are obtained according to the reservoir information of the target reservoir, the supercritical carbon dioxide compression factor and the micro-average connected porosity, which is constrained by the following mathematical expression:

[0014]

[0015] Wherein, 1P is the proven reserves of carbon dioxide geological storage in the target reservoir; A is the reservoir area; H is the reservoir thickness; S w is the water saturation of the reservoir; ε t is the microscopic average connected porosity; K is the supercritical carbon dioxide compression factor.

[0016] According to some embodiments of the present application, the digital core technology is used to perform multi-scale digital quantitative analysis on each core to obtain the microscopic connected porosity of each core, including:

[0017] Digitally scanning and three-dimensionally reconstructing each of the cores to obtain corresponding three-dimensional volume data of the pore space structure;

[0018] The microscopic connected porosity of each core is obtained based on the three-dimensional volume data of the pore space structure.

[0019] According to some embodiments of the present application, the digital scanning and three-dimensional reconstruction of each core to obtain corresponding three-dimensional volume data of pore space structure includes:

[0020] Performing multi-scale digital scanning on each of the cores to obtain multiple two-dimensional scanned images at multiple resolutions;

[0021] Three-dimensional reconstruction is performed based on the multiple two-dimensional scanning images at multiple resolutions to obtain multiple three-dimensional data volumes of pore space structures at multiple resolutions.

[0022] According to some embodiments of the present application, obtaining the microscopic connected porosity of each core according to the pore space structure three-dimensional volume data includes:

[0023] Performing mercury injection simulation on the multiple pore space structure three-dimensional data volumes at multiple resolutions to obtain multiple connected porosities at corresponding multiple resolutions;

[0024] The microscopic connected porosity is obtained according to the multiple connected porosities at multiple resolutions.

[0025] According to some embodiments of the present application, the mercury injection simulation is performed on a plurality of pore space structure three-dimensional data volumes at a plurality of resolutions to obtain a plurality of connected porosities at the corresponding plurality of resolutions, and the acquisition of each of the connected porosities at each resolution includes:

[0026] According to the three-dimensional data volume of the pore space structure, a pore distance map is obtained;

[0027] According to the pore distance map, the mercury injection simulation is performed to obtain the mercury injection volume of the pore space structure three-dimensional data body;

[0028] The interconnected porosity is obtained according to the mercury injection volume.

[0029] According to the second aspect of the present application, the device for assessing the geological storage capacity of carbon dioxide comprises:

[0030] A reservoir information acquisition unit, used to acquire reservoir information of a target reservoir, wherein the reservoir information includes reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure;

[0031] A core acquisition unit, used for acquiring a plurality of cores of the target reservoir;

[0032] A microscopic connected porosity acquisition unit is used to perform multi-scale digital quantitative analysis on each core based on digital core technology to obtain the microscopic connected porosity of each core;

[0033] A micro-average connected porosity acquisition unit, used to obtain the micro-average connected porosity of the target reservoir according to the micro-connected porosity of each of the cores;

[0034] The geological storage proven reserves acquisition unit is used to obtain the carbon dioxide geological storage proven reserves of the target reservoir according to the reservoir information of the target reservoir and the micro-average connected porosity.

[0035] An electronic device according to an embodiment of the third aspect of the present application includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method for assessing the geological storage capacity of carbon dioxide as described in any one of the embodiments of the first aspect are implemented.

[0036] According to the computer-readable storage medium of the fourth aspect embodiment of the present application, computer-executable instructions are stored, and the computer-executable instructions are used to execute the method for assessing the geological storage capacity of carbon dioxide as described in the first aspect embodiment.

[0037] In the embodiments of the present application, the proved reserves of carbon dioxide geological storage are evaluated by using the parameter of micro-average connected porosity of the reservoir. Compared with the current evaluation using total porosity or effective porosity defined by logging method, the present application can reflect a more realistic amount of carbon dioxide that can be injected into the reservoir, and achieve a more accurate evaluation and calculation of the overall reserves of carbon dioxide geological storage.

[0038] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 This is a flow chart of a method for assessing the geological storage capacity of carbon dioxide according to an embodiment of the present application;

[0041] Figure 2 It is a structural schematic diagram of an embodiment of a carbon dioxide geological storage capacity assessment device of the present application;

[0042] Figure 3 It is a schematic diagram of the hardware structure of an embodiment of the electronic device of the present application. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0044] In the description of this application, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In the description of this application, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0047] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments.

[0048] Figure 1 This is a flow chart of a method for assessing the geological storage capacity of carbon dioxide according to an embodiment of the present application; Figure 2 It is a structural schematic diagram of an embodiment of a carbon dioxide geological storage capacity assessment device of the present application; Figure 3 It is a schematic diagram of the hardware structure of an embodiment of the electronic device of the present application.

[0049] See below Figure 1 , the embodiments of the present application are further described.

[0050] The present application embodiment proposes a method for evaluating the geological storage capacity of carbon dioxide, which comprises the following steps:

[0051] Step 101, obtaining reservoir information of a target reservoir, the reservoir information including reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure;

[0052] Step 102, obtaining multiple cores of the target reservoir;

[0053] Step 103: Based on the digital core technology, a multi-scale digital quantitative analysis is performed on each core to obtain the microscopic connected porosity of each core;

[0054] Step 104: Obtain the microscopic average connected porosity of the target reservoir according to the microscopic connected porosity of each core;

[0055] Step 105: Obtain the proven reserves of carbon dioxide geological storage in the target reservoir based on the reservoir information and the microscopic average connected porosity of the target reservoir.

[0056] In the embodiments of the present application, the proved reserves of carbon dioxide geological storage are evaluated by using the parameter of micro-average connected porosity of the reservoir. Compared with the current evaluation using total porosity or effective porosity defined by logging method, the present application can reflect a more realistic amount of carbon dioxide that can be injected into the reservoir, and achieve a more accurate evaluation and calculation of the overall reserves of carbon dioxide geological storage.

[0057] In addition, for the currently commonly used calculation method for carbon dioxide geological storage storage, this application has achieved an important supplement to the other calculation methods, and provided a solid theoretical basis and technical support for the establishment of a 1P / 2P / 3P reserve assessment standard system suitable for carbon dioxide geological storage, where 1P, 2P, and 3P refer to different types of reserve estimates, 1P represents a low estimate of reserves, which is equivalent to proven reserves, i.e., proved reserves, 2P represents the best estimate of reserves, which is equivalent to the sum of proven reserves and possible reserves, and 3P represents a high estimate of reserves, which is equivalent to the sum of proven reserves plus possible reserves plus potential reserves.

[0058] Among the above reservoir information, the reservoir area and reservoir thickness can be determined by the geological exploration data of the target reservoir collected in the early stage, and the reservoir water saturation can be calculated by Archie's formula. Specifically, the specific parameters can be obtained through logging data and indoor tests.

[0059] The above-mentioned acquisition of multiple cores of the target reservoir can be done by coring through drilling. Specifically, underground rocks are brought to the surface in blocks through special drilling tools and certain technical measures. Such blocks of rock are called cores. Cores are the most intuitive and practical data for understanding the characteristics of underground strata. By measuring various properties of cores, the underground structure and rock deposition environment of the current target reservoir can be intuitively studied. In the process of mineral exploration and development, it is necessary to carry out drilling work according to the stratigraphic position and depth of the target reservoir, lower the coring tool into the well, and drill out rock samples.

[0060] For example, a core may be collected at every meter depth within the depth range of the target reservoir, and finally the core collection of the entire target reservoir is completed.

[0061] The above-mentioned microscopic connected porosity takes into account the connectivity between the pores in the formation. Since the injection and storage of carbon dioxide can only be achieved in a connected pore structure, if the pores are not connected, the effective injection of carbon dioxide cannot be achieved. Therefore, the parameter of microscopic connected porosity of the reservoir is introduced for the assessment of the proven reserves of carbon dioxide geological storage.

[0062] The above-mentioned microscopic average connected porosity is obtained by averaging the microscopic connected porosity of all cores of the target reservoir. It can comprehensively reflect the microscopic effective connected porosity of the target reservoir as a whole by combining the microscopic connected porosity of cores obtained at different depths of the target reservoir.

[0063] In some embodiments, the proven reserves of carbon dioxide geological storage in the target reservoir are obtained based on the reservoir information and the microscopic average connected porosity of the target reservoir, including:

[0064] Obtain the supercritical carbon dioxide compression factor of the target reservoir based on the formation temperature and pressure;

[0065] Based on the reservoir information, supercritical carbon dioxide compression factor and micro-average connected porosity of the target reservoir, the proven reserves of carbon dioxide geological storage in the target reservoir are obtained.

[0066] In this embodiment, the supercritical carbon dioxide compression factor is determined by obtaining the formation temperature and pressure in the reservoir information of the target reservoir, and then the proven reserves of carbon dioxide geological storage in the target reservoir are calculated and evaluated based on the reservoir area, reservoir thickness, reservoir water saturation, supercritical carbon dioxide compression factor and micro-average connected porosity in the reservoir information of the target reservoir.

[0067] The above-mentioned supercritical carbon dioxide compression factor is related to the change of temperature and pressure, and can be determined by referring to a table according to the actual formation temperature and pressure.

[0068] In some embodiments, the proven reserves of carbon dioxide geological storage in the target reservoir are obtained based on the reservoir information, supercritical carbon dioxide compressibility factor and micro-average connected porosity of the target reservoir, which is constrained by the following mathematical expression:

[0069]

[0070] Where 1P is the proven reserves of carbon dioxide geological storage in the target reservoir; A is the reservoir area; H is the reservoir thickness; S w is the reservoir water saturation; ε t is the microscopic average connected porosity; K is the supercritical carbon dioxide compression factor.

[0071] In this implementation, a specific calculation formula is given for evaluating the proven reserves of carbon dioxide geological storage in the target reservoir based on the reservoir area, reservoir thickness, reservoir water saturation, supercritical carbon dioxide compression factor and micro-average connected porosity of the target reservoir. Since the micro-average connected porosity is used instead of the total porosity or effective porosity, the calculation of the actual storage capacity of the reservoir can be achieved more accurately.

[0072] Existing calculation methods often use the parameter of effective porosity of formations to calculate reserves, but effective porosity refers to the average value of the part of the logging curve with porosity greater than 5%. The method of calculating reserves by effective porosity cannot reflect the real reserves of the reservoir, because the reserves of carbon dioxide are not only related to the number of pores, but also depend on how many pores are connected. Only connected pores can allow carbon dioxide to enter and achieve effective storage. Therefore, this application improves all current reserve calculation methods based on effective porosity, and obtains the microscopic average connected porosity of the reservoir through digital core technology, which can be regarded as the real effective connected porosity to replace the existing effective porosity, so as to more accurately calculate the real storage capacity of the reservoir.

[0073] In some embodiments, based on digital core technology, a multi-scale digital quantitative analysis is performed on each core to obtain the microscopic connected porosity of each core, including:

[0074] Each core is digitally scanned and 3D reconstructed to obtain the corresponding pore space structure 3D volume data;

[0075] According to the three-dimensional volume data of pore space structure, the microscopic connected porosity of each core is obtained.

[0076] In this embodiment, digital scanning and three-dimensional reconstruction are performed through digital core technology to obtain three-dimensional volume data of the pore space structure, providing an intuitive view of the pore structure, facilitating the analysis of the internal structure of the rock, and the microscopic parameters of the digital core can be adjusted as needed, reused, and various simulations and calculations can be performed, thereby obtaining accurate microscopic connected porosity data of the core.

[0077] In some embodiments, each core is digitally scanned and three-dimensionally reconstructed to obtain corresponding three-dimensional volume data of pore space structure, including:

[0078] Perform multi-scale digital scanning on each core to obtain multiple two-dimensional scanning images at multiple resolutions;

[0079] Three-dimensional reconstruction is performed based on multiple two-dimensional scanning images at multiple resolutions to obtain multiple three-dimensional data volumes of pore space structures at multiple resolutions.

[0080] In this embodiment, by performing multi-scale digital scanning and three-dimensional reconstruction, that is, scanning and modeling at different resolutions, detailed information of the entire core and different parts can be obtained to obtain more comprehensive characteristic information of the core.

[0081] The multi-scale digital scanning can be performed by using X-ray CT (X-Ray Computed Tomography) to perform multi-scale digital scanning on the core, scanning at different resolutions to obtain multiple two-dimensional scanned images at different resolutions.

[0082] In the above-mentioned multiple 2D scanned images at multiple resolutions, low-resolution core images can identify larger pores, but micropores smaller than the scanned resolution cannot be effectively identified. The actual size of the core corresponding to the high-resolution core image is smaller, and the corresponding digital core model is difficult to ensure representativeness. The digital core model needs to accurately reflect the overall size structure of the core and the characteristics of the rock pore structure. Therefore, based on the inheritance of scanning sample sampling, the two resolution scanned images can be spatially registered.

[0083] For example, the above-mentioned multiple resolutions may include a first resolution and a second resolution, wherein the first resolution is smaller than the second resolution, and the entire core is scanned at the first resolution, and at the second resolution, after sampling the core, a small sample taken out is scanned.

[0084] For example, the above-mentioned multiple resolutions may include a first resolution and a second resolution, wherein the first resolution may be 1.5 μm and the second resolution may be 1.5 μm. The entire core is scanned at the first resolution, and at the second resolution, after sampling the core, a small sample taken out is scanned.

[0085] After the above three-dimensional reconstruction, the three-dimensional data volume of the pore space structure is obtained. The three-dimensional reconstruction of the two-dimensional scanned image can be performed, and the reconstructed three-dimensional image is subjected to threshold segmentation to distinguish the rock skeleton from the rock pores, so as to obtain the three-dimensional data volume of the core pore space structure. In the digital core simulation results, there are rock skeletons composed of materials such as mud, cement, and minerals, as well as rock pore structures. By performing threshold segmentation on the reconstructed three-dimensional image and distinguishing the rock skeleton from the rock pores, specific information of the pore structure can be obtained.

[0086] In some embodiments, the microscopic connected porosity of each core is obtained based on the pore space structure three-dimensional volume data, including:

[0087] Mercury injection simulation is performed on multiple pore space structure three-dimensional data volumes at multiple resolutions to obtain multiple connected porosities at corresponding multiple resolutions;

[0088] According to the multiple connected porosities at multiple resolutions, the microscopic connected porosity is obtained.

[0089] In this embodiment, a plurality of connected porosities are obtained by performing mercury injection simulation on each pore space structure three-dimensional data volume, and then the plurality of connected porosities at multiple resolutions are integrated to obtain a more accurate microscopic connected porosity.

[0090] The microscopic connected porosity is obtained according to the multiple connected porosities at multiple resolutions. The microscopic connected porosity of the core can be obtained by weighted summing the multiple connected porosities of the core at different resolutions.

[0091] In some embodiments, mercury injection simulation is performed on a plurality of pore space structure three-dimensional data volumes at a plurality of resolutions to obtain a plurality of connected porosities at the corresponding plurality of resolutions, and the acquisition of each connected porosity at each resolution includes:

[0092] According to the three-dimensional data volume of pore space structure, a pore distance map is obtained;

[0093] According to the pore distance map, mercury injection simulation is carried out to obtain the mercury injection volume of the three-dimensional data body of the pore space structure;

[0094] The connected porosity is obtained based on the mercury injection volume.

[0095] In this embodiment, mercury injection simulation is performed on the three-dimensional data body of the pore space structure. Based on the principle of mercury injection test, the pore volume in the three-dimensional data body of the pore space structure is determined according to the mercury injection volume, so that the corresponding connected porosity can be determined more accurately.

[0096] The mercury injection simulation process can be to use software to perform a mercury injection test on a three-dimensional data volume of a pore space structure. The mercury injection test is also called mercury injection method, which is a method for determining the pore size distribution of porous materials.

[0097] Since mercury is non-wettable to most solid materials, external pressure is required to enter the solid pores. Therefore, as the external pressure increases, mercury can enter smaller and smaller pores. By measuring the amount of mercury entering the pores under different external pressures, that is, the mercury intrusion volume, the pore volume of the corresponding pore size can be obtained. The pore size distribution curve of the material can be obtained through the mercury intrusion test, which includes the relationship between the cumulative mercury intrusion volume and the pore size, and the differential curve of the pore volume and the pore size, thereby characterizing the size and distribution of the material pores. The mercury intrusion test is applicable to a variety of materials, including concrete, mortar, ceramics, graphene, coal, alumina, etc., and is used to analyze their porosity, pore structure and distribution characteristics.

[0098] The above mercury intrusion simulation can be carried out based on the Young-Laplace equation using the maximum sphere method and the distance method to simulate the intrusion range of mercury in the rock.

[0099] For example, through digital core technology, the real three-dimensional distribution map of the pore space inside the rock sample can be obtained, and the spatial distance between the pores can be quantified to obtain a pore distance map; according to the obtained pore distance map, the pore space is divided into a series of individual pores or throats, that is, the inner diameter size; at this time, a mercury injection surface is selected, and mercury first invades the largest pore space, that is, the maximum spherical radius, and the corresponding capillary pressure is the minimum mercury injection pressure. Subsequently, mercury enters smaller connected pores according to the injection direction, and the corresponding capillary radius is the pore throat radius. The pore volume connected by the throat is the mercury injection volume. When the pore throat radius is zero, the simulation process stops, and the microscopic connected porosity of the core can be obtained.

[0100] Since the mercury injection method can only measure connected pores and semi-through pores, that is, it can only measure open pores but cannot enter closed pores, it is consistent with the scenario that the injection and storage of carbon dioxide can only be achieved in connected pore structures. If the pores are not connected, the effective injection of carbon dioxide cannot be achieved. Therefore, the measured microscopic connected porosity parameter is more suitable for the assessment of proven reserves of carbon dioxide geological storage.

[0101] The carbon dioxide geological storage capacity assessment method provided in the embodiment of the present application can be executed by the carbon dioxide geological storage capacity assessment device 200. In the embodiment of the present application, the carbon dioxide geological storage capacity assessment device 200 is used as an example to illustrate the carbon dioxide geological storage capacity assessment method provided in the embodiment of the present application.

[0102] See also Figure 2 , is a schematic diagram of the structure of a carbon dioxide geological storage capacity assessment device 200 provided in an embodiment of the present application. Figure 2 As shown, the carbon dioxide geological storage capacity assessment device 200 includes:

[0103] A reservoir information acquisition unit 201 is used to acquire reservoir information of a target reservoir, wherein the reservoir information includes reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure;

[0104] A core acquisition unit 202, used to acquire multiple cores of a target reservoir;

[0105] The microscopic connected porosity acquisition unit 203 is used to perform multi-scale digital quantitative analysis on each core based on the digital core technology to obtain the microscopic connected porosity of each core;

[0106] A micro-average connected porosity acquisition unit 204 is used to obtain the micro-average connected porosity of the target reservoir according to the micro-connected porosity of each core;

[0107] The geological storage proven reserves acquisition unit 205 is used to obtain the geological storage proven reserves of carbon dioxide of the target reservoir according to the reservoir information and the micro-average connected porosity of the target reservoir.

[0108] In some embodiments, the geological storage proven reserves acquisition unit 205 can be used to:

[0109] Obtain the supercritical carbon dioxide compression factor of the target reservoir based on the formation temperature and pressure;

[0110] Based on the reservoir information, supercritical carbon dioxide compression factor and micro-average connected porosity of the target reservoir, the proven reserves of carbon dioxide geological storage in the target reservoir are obtained.

[0111] In some embodiments, the geological storage proven reserves acquisition unit 205 can be used to:

[0112]

[0113] Where 1P is the proven reserves of carbon dioxide geological storage in the target reservoir; A is the reservoir area; H is the reservoir area and reservoir thickness; Sw is the reservoir water saturation; ε t is the microscopic average connected porosity; K is the supercritical carbon dioxide compression factor.

[0114] In some embodiments, the microscopic connected porosity acquisition unit 203 may be used to:

[0115] Each core is digitally scanned and 3D reconstructed to obtain the corresponding pore space structure 3D volume data;

[0116] According to the three-dimensional volume data of pore space structure, the microscopic connected porosity of each core is obtained.

[0117] In some embodiments, the microscopic connected porosity acquisition unit 203 may be used to:

[0118] Perform multi-scale digital scanning on each core to obtain multiple two-dimensional scanning images at multiple resolutions;

[0119] Three-dimensional reconstruction is performed based on multiple two-dimensional scanning images at multiple resolutions to obtain multiple three-dimensional data volumes of pore space structures at multiple resolutions.

[0120] In some embodiments, the microscopic connected porosity acquisition unit 203 may be used to:

[0121] Mercury injection simulation is performed on multiple pore space structure three-dimensional data volumes at multiple resolutions to obtain multiple connected porosities at corresponding multiple resolutions;

[0122] According to the multiple connected porosities at multiple resolutions, the microscopic connected porosity is obtained.

[0123] In some embodiments, the microscopic connected porosity acquisition unit 203 may be used to:

[0124] According to the three-dimensional data volume of pore space structure, a pore distance map is obtained;

[0125] According to the pore distance map, mercury injection simulation is carried out to obtain the mercury injection volume of the three-dimensional data body of the pore space structure;

[0126] The connected porosity is obtained based on the mercury injection volume.

[0127] Since the carbon dioxide geological storage capacity assessment device 200 adopts all the technical solutions of the carbon dioxide geological storage capacity assessment method of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described in detail here.

[0128] Figure 3 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.

[0129] The electronic device may include a processor 301 and a memory 302 storing computer program instructions.

[0130] Specifically, the processor 301 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0131] The memory 302 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 302 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 302 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 302 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 302 is a non-volatile solid-state memory.

[0132] In some embodiments, the memory 302 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0133] The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement any one of the methods for assessing the geological storage capacity of carbon dioxide in the above embodiments.

[0134] In one example, the electronic device may further include a communication interface 303 and a bus 310. Figure 3 As shown, the processor 301, the memory 302, and the communication interface 303 are connected via a bus 310 and communicate with each other.

[0135] The communication interface 303 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0136] Bus 310 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 310 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0137] The electronic device can execute the method for evaluating the geological storage capacity of carbon dioxide in the embodiment of the present application, thereby realizing the combination of Figure 1 and Figure 2 A method and apparatus for assessing the geological storage capacity of carbon dioxide is described.

[0138] In addition, in combination with the carbon dioxide geological storage capacity assessment method in the above embodiment, the present application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the carbon dioxide geological storage capacity assessment methods in the above embodiment is implemented.

[0139] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0140] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0141] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0142] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0143] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for assessing the geological storage capacity of carbon dioxide, characterized in that: include: Acquire reservoir information of the target reservoir, wherein the reservoir information includes reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure; Acquiring multiple cores of the target reservoir; Based on digital core technology, a multi-scale digital quantitative analysis is performed on each core to obtain the microscopic connected porosity of each core; According to the microscopic connected porosity of each core, obtaining the microscopic average connected porosity of the target reservoir; The proven reserves of carbon dioxide geological storage in the target reservoir are obtained according to the reservoir information and the microscopic average connected porosity of the target reservoir.

2. The method for assessing the geological storage capacity of carbon dioxide according to claim 1, characterized in that: The step of obtaining the proven reserves of carbon dioxide geological storage in the target reservoir according to the reservoir information and the microscopic average connected porosity of the target reservoir comprises: Obtaining a supercritical carbon dioxide compression factor of the target reservoir according to the formation temperature and pressure; The proven reserves of carbon dioxide geological storage in the target reservoir are obtained according to the reservoir information of the target reservoir, the supercritical carbon dioxide compression factor and the micro-average connected porosity.

3. The method for assessing the geological storage capacity of carbon dioxide according to claim 2, characterized in that: The proven reserves of carbon dioxide geological storage of the target reservoir are obtained according to the reservoir information of the target reservoir, the supercritical carbon dioxide compressibility factor and the micro-average connected porosity, which is constrained by the following mathematical expression: Wherein, 1P is the proven reserves of carbon dioxide geological storage in the target reservoir; A is the reservoir area; H is the reservoir thickness; S w is the water saturation of the reservoir; ε t is the microscopic average connected porosity; K is the supercritical carbon dioxide compression factor.

4. The method for assessing the geological storage capacity of carbon dioxide according to claim 1, characterized in that: Based on the digital core technology, a multi-scale digital quantitative analysis is performed on each core to obtain the microscopic connected porosity of each core, including: Digitally scanning and three-dimensionally reconstructing each of the cores to obtain corresponding three-dimensional volume data of the pore space structure; The microscopic connected porosity of each core is obtained based on the three-dimensional volume data of the pore space structure.

5. The method for assessing the geological storage capacity of carbon dioxide according to claim 4, characterized in that: The digital scanning and three-dimensional reconstruction of each core to obtain corresponding three-dimensional volume data of pore space structure includes: Performing multi-scale digital scanning on each of the cores to obtain multiple two-dimensional scanned images at multiple resolutions; Three-dimensional reconstruction is performed based on the multiple two-dimensional scanning images at multiple resolutions to obtain multiple three-dimensional data volumes of pore space structures at multiple resolutions.

6. The method for assessing the geological storage capacity of carbon dioxide according to claim 5, characterized in that: The step of obtaining the microscopic connected porosity of each core according to the pore space structure three-dimensional volume data includes: Performing mercury injection simulation on the multiple pore space structure three-dimensional data volumes at multiple resolutions to obtain multiple connected porosities at corresponding multiple resolutions; The microscopic connected porosity is obtained according to the multiple connected porosities at multiple resolutions.

7. The method for assessing the geological storage capacity of carbon dioxide according to claim 6, characterized in that: The mercury injection simulation is performed on a plurality of pore space structure three-dimensional data bodies at a plurality of resolutions to obtain a plurality of connected porosities at the corresponding plurality of resolutions, and the acquisition of each of the connected porosities at each resolution includes: According to the three-dimensional data volume of the pore space structure, a pore distance map is obtained; According to the pore distance map, the mercury injection simulation is performed to obtain the mercury injection volume of the pore space structure three-dimensional data body; The interconnected porosity is obtained according to the mercury injection volume.

8. A device for evaluating the geological storage capacity of carbon dioxide, characterized in that: include: A reservoir information acquisition unit, used to acquire reservoir information of a target reservoir, wherein the reservoir information includes reservoir area, reservoir thickness, reservoir water saturation and formation temperature and pressure; A core acquisition unit, used for acquiring a plurality of cores of the target reservoir; A microscopic connected porosity acquisition unit is used to perform multi-scale digital quantitative analysis on each core based on digital core technology to obtain the microscopic connected porosity of each core; A micro-average connected porosity acquisition unit, used to obtain the micro-average connected porosity of the target reservoir according to the micro-connected porosity of each of the cores; The geological storage proven reserves acquisition unit is used to obtain the carbon dioxide geological storage proven reserves of the target reservoir according to the reservoir information of the target reservoir and the micro-average connected porosity.

9. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for assessing the geological storage capacity of carbon dioxide as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the method for assessing the geological storage capacity of carbon dioxide according to any one of claims 1 to 7.

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