Buried corrosion hole development potential evaluation method, device, equipment and medium

Abstract

The invention discloses a buried corrosion hole development potential evaluation method, device, equipment and medium. The method comprises the following steps: detecting the percentage content of calcite and the percentage content of dolomite in a carbonate rock sample; determining a first index based on the percentage content of calcite and the percentage content of dolomite; determining a first calcium ion concentration and a first magnesium ion concentration in the preset corrosion liquid, and determining a second calcium ion concentration and a second magnesium ion concentration in the preset corrosion liquid after the carbonate rock sample is corroded in the preset corrosion liquid; determining a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration; and evaluating the buried corrosion hole development potential of the target area based on the first index and the second index. According to the method, the development potential of the buried corrosion hole is evaluated accurately through quantitative evaluation of the first index and the second index, and the problem of inaccurate evaluation of the development potential of the buried corrosion hole is solved.

Description

Technical Field

[0001] The invention relates to the field of petroleum and natural gas geology, and in particular to a method, device, equipment and medium for evaluating the development potential of buried dissolution holes. Background Art

[0002] In recent years, several large oil and gas fields such as Puguang, Anyue, Shunbei and Fuman have been discovered in the deep and ultra-deep carbonate rock fields in my country. Exploration practice has proved that the ultra-deep carbonate rocks in my country's sedimentary basins are rich in oil and gas resources. Ultra-deep carbonate rocks have become a hot spot for oil and gas exploration and the main battlefield for increasing reserves and production in my country. Buried dissolution pores are an important part of the storage space of deep carbonate reservoirs.

[0003] At present, the evaluation method of the development potential of buried dissolution pores is to dissolve the buried diagenetic rocks, and then analyze the ions before and after the dissolution, or analyze the overall dissolution rate to quantitatively evaluate the development potential of buried dissolution pores. However, the current evaluation method can only obtain the overall dissolution rate of the rock, and cannot distinguish the dissolution intensity of different minerals in carbonate rocks. It is difficult to clarify the control of carbonate minerals on buried dissolution, and it is also impossible to quantitatively evaluate the dissolution rate of carbonate minerals close to the geological conditions of the buried environment, thereby restricting reservoir evaluation and prediction. Therefore, there is an urgent need for an evaluation method for the development potential of buried dissolution pores that solves the above problems. Summary of the invention

[0004] The present invention provides a method, device, equipment and medium for evaluating the development potential of buried dissolution pores and caves, so as to solve the problems of being unable to distinguish the dissolution intensity of different minerals in carbonate rocks, being difficult to clarify the control effect of carbonate minerals on buried dissolution, and being unable to quantitatively evaluate the dissolution rate of carbonate minerals close to the geological conditions of the buried environment, so as to achieve accurate evaluation of the development potential of buried dissolution pores and caves.

[0005] According to one aspect of the present invention, a method for evaluating the development potential of buried dissolution pores and caves is provided, the method comprising:

[0006] Obtaining carbonate rock block samples in the target area, and detecting the percentage of calcite and the percentage of dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness;

[0007] Determine a first index based on the percentage of the calcite and the percentage of the dolomite, wherein the first index is used to describe the proportion of minerals in the carbonate rock block sample;

[0008] Determining a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and determining a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample has been completely dissolved in the preset dissolution solution;

[0009] Determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, wherein the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution;

[0010] The development potential of buried dissolution pores in the target area is evaluated based on the first index and the second index.

[0011] According to another aspect of the present invention, a device for evaluating the development potential of buried dissolution pores and caves is provided, the device comprising:

[0012] A detection module, used to obtain carbonate rock block samples in a target area and detect the percentage of calcite and dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness;

[0013] A first index determination module, configured to determine a first index based on the percentage of the calcite and the percentage of the dolomite, wherein the first index is used to describe the proportion of minerals in the carbonate rock block sample;

[0014] an ion concentration determination module, used to determine a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and to determine a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample has been completely dissolved in the preset dissolution solution;

[0015] A second index determination module, configured to determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, wherein the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution;

[0016] An evaluation module is used to evaluate the development potential of buried dissolution pores in the target area based on the first index and the second index.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] at least one processor; and

[0019] a memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for evaluating the development potential of buried dissolution pores described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the method for evaluating the development potential of buried dissolution pores described in any embodiment of the present invention when executed by a processor.

[0022] The technical solution of the embodiment of the present invention obtains carbonate rock block samples in the target area and detects the percentage of calcite and dolomite in the carbonate rock block samples; determines a first index based on the percentage of calcite and the percentage of dolomite, thereby accurately determining the proportion of minerals in the carbonate rock block samples; further determines a first calcium ion concentration and a first magnesium ion concentration in a preset dissolving solution, and determines a second calcium ion concentration and a second magnesium ion concentration in the preset dissolving solution after the carbonate rock block samples are completely dissolved in the preset dissolving solution, and then determines the first calcium ion concentration and the first magnesium ion concentration based on the first calcium ion concentration and the first magnesium ion concentration. The second index is determined by the concentration, the second calcium ion concentration and the second magnesium ion concentration, which realizes the accurate determination of the dissolution rate of each mineral after the dissolution of the carbonate rock block sample, and also realizes the quantitative evaluation of the dissolution rate of carbonate minerals close to the geological conditions of the burial environment. Finally, based on the first index and the second index, the development potential of buried dissolution pores in the target area is evaluated, thereby solving the problem of unclear control of mineral composition on the dissolution intensity of carbonate rocks in (ultra) deep burial environments, thereby accurately evaluating the development potential of buried dissolution pores and solving the problem of inaccurate evaluation of the development potential of buried dissolution pores.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a flow chart of a method for evaluating the development potential of buried dissolution pores and caves provided according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a carbonate rock mineral dissolution device applicable to an embodiment of the present invention;

[0027] Figure 3 This is a field emission electron microscope picture of the bioclastic micrite limestone before dissolution applicable to the embodiment of the present invention;

[0028] Figure 4 This is a field emission electron microscope picture of powder crystal dolomite before dissolution applicable to an embodiment of the present invention;

[0029] Figure 5 This is a field emission electron microscope picture of the bioclastic micrite limestone after dissolution applicable to the embodiment of the present invention;

[0030] Figure 6 This is a field emission electron microscope picture of powder crystal dolomite after dissolution applicable to an embodiment of the present invention;

[0031] Figure 7 2 is a schematic diagram of the structure of a device for evaluating the development potential of buried dissolution pores and caves according to an embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of an electronic device for implementing the method for evaluating the development potential of buried dissolution pores according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Embodiment 1

[0036] Figure 1The flowchart of a method for evaluating the development potential of buried soluble pores and caves provided in an embodiment of the invention is applicable to the situation of evaluating the development potential of buried soluble pores and caves. The method can be executed by a device for evaluating the development potential of buried soluble pores and caves. The device for evaluating the development potential of buried soluble pores and caves can be implemented in the form of hardware and / or software. The device for evaluating the development potential of buried soluble pores and caves can be configured in an electronic device having the method for evaluating the development potential of buried soluble pores and caves. Figure 1 As shown, the method includes:

[0037] S110, obtaining carbonate rock block samples in the target area, and detecting the percentage of calcite and the percentage of dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness.

[0038] The carbonate rock block sample is a rock block with a preset diameter and a preset thickness. For example, it can be prepared into a carbonate rock block with a diameter of 2.5 cm and a thickness of 0.5 cm by a drill and a slicer.

[0039] Specifically, this application mainly evaluates the development potential of buried dissolution pores in carbonate rocks, so carbonate rock block samples in the study area (target area) are selected, and then the carbonate rock block samples are analyzed by X-ray diffraction to determine the percentage of calcite and dolomite in the carbonate rock block samples.

[0040] S120. Determine a first index based on the percentage of calcite and the percentage of dolomite, where the first index is used to describe the proportion of minerals in the carbonate rock block sample.

[0041] Specifically, the percentage of calcite R c And dolomite percentage R d The ratio of the first index I R , which can be expressed as: By analyzing the first index, the proportion of calcite and dolomite in the carbonate rock block sample can be accurately obtained, thereby obtaining the distribution of calcite and dolomite in the target area.

[0042] S130, determining a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and determining a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample is completely dissolved in the preset dissolution solution.

[0043] Among them, for the preparation of the preset dissolution solution, first determine the main acidic fluid type in the target area, prepare the preset dissolution solution for the experiment, and the preset dissolution solution is prepared by adding deionized water and analytically pure chemical reagents or gases. The specific method can take the organic acid solution as an example, using deionized water to add a certain amount of acetic acid reagent to prepare the preset dissolution solution (organic acid solution) for the experiment. The preset dissolution solution is loaded into the carbonate mineral dissolution device (such as Figure 2 As shown), the carbonate rock mineral dissolution device is used to complete the dissolution of the carbonate rock block sample.

[0044] Specifically, in order to accurately obtain the dissolution condition of the carbonate rock block sample, it is necessary to first determine the first calcium ion concentration and the first magnesium ion concentration in the preset dissolution solution when the carbonate rock block sample is not placed in the preset dissolution solution, and then determine the second calcium ion concentration and the second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample is completely dissolved in the preset dissolution solution, so that the dissolution condition of the carbonate rock block sample can be accurately obtained by comparing the ion concentrations before and after.

[0045] S140. Determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, where the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution.

[0046] Specifically, the second calcium ion concentration and the first calcium ion concentration The difference between Ca , the second magnesium ion concentration and the first magnesium ion concentration The difference between Mg ; Further determine the flow rate f of the preset dissolution solution and the reaction time t of the carbonate rock block sample, and determine the calcite dissolution rate DI based on the flow rate, reaction time, calcium ion concentration difference and magnesium ion concentration difference c and dolomite dissolution rate DI d , which can be expressed as:

[0047]

[0048]

[0049] Where S is the surface area of ​​the carbonate rock block sample before dissolution;

[0050] Finally, the second index is determined based on the calcite dissolution rate and the dolomite dissolution rate. Specifically, the ratio of the calcite dissolution rate to the dolomite dissolution rate is used as the second index, which can be expressed as:

[0051]

[0052] Among them, when I D When >1, it means that carbonate rock dissolution is mainly calcite minerals; when I D When <1, it means that carbonate rock dissolution is mainly composed of dolomite minerals.

[0053] In addition, the overall dissolution rate DI of the carbonate rock block sample can be determined based on the flow rate, reaction time, calcium ion concentration difference and magnesium ion concentration difference. r , in order to provide a theoretical basis for subsequent research, specifically expressed as:

[0054]

[0055] Where S is the surface area of ​​the carbonate rock block sample before dissolution.

[0056] S150. Evaluate the potential for buried dissolution pores and caves in the target area based on the first index and the second index.

[0057] Specifically, when the second index is greater than the first index and the second index is greater than one, the burial dissolution is mineral selective and calcite has preferential dissolution; when the second index is greater than the first index and the second index is less than one, the burial dissolution is non-mineral selective; when the second index is less than the first index and the second index is greater than one, the burial dissolution is non-mineral selective; when the second index is less than the first index and the second index is less than one, the burial dissolution is mineral selective and dolomite has preferential dissolution.

[0058] The technical solution of the embodiment of the present invention obtains carbonate rock block samples in the target area and detects the percentage of calcite and dolomite in the carbonate rock block samples; determines a first index based on the percentage of calcite and the percentage of dolomite, thereby accurately determining the proportion of minerals in the carbonate rock block samples; further determines a first calcium ion concentration and a first magnesium ion concentration in a preset dissolving solution, and determines a second calcium ion concentration and a second magnesium ion concentration in the preset dissolving solution after the carbonate rock block samples are completely dissolved in the preset dissolving solution, and then determines the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration and the second magnesium ion concentration based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration and the second magnesium ion concentration. The second index is determined by the magnesium ion concentration, which realizes the accurate determination of the dissolution rate of each mineral after the dissolution of the carbonate rock block sample, and also realizes the quantitative evaluation of the dissolution rate of carbonate minerals close to the geological conditions of the burial environment. Finally, based on the first index and the second index, the development potential of buried dissolution pores in the target area is evaluated, thereby solving the problem of unclear control of mineral composition on the dissolution intensity of carbonate rocks in (ultra) deep burial environments, thereby accurately evaluating the development potential of buried dissolution pores, solving the problem of inaccurate evaluation of the development potential of buried dissolution pores, and providing a theoretical basis for the evaluation of the development potential of buried dissolution pores in deep carbonate rocks.

[0059] Embodiment 2

[0060] This embodiment describes the above embodiments by way of example and does not limit the protection scope of the present invention.

[0061] This embodiment provides an evaluation method for the development potential of buried dissolution pores in carbonate rocks at a depth of 10,000 meters, specifically:

[0062] Step 1: Selection of Dissolution Simulation Experiment Instrument

[0063] This embodiment adopts the developed carbonate mineral dissolution device, the principle diagram of which is shown in Figure 2 It can meet the quantitative dissolution simulation close to the real diagenetic background (10,000 meters deep) under the conditions of open-closed system, dynamic-static environment, normal temperature -400℃, and normal pressure -100MPa.

[0064] The carbonate mineral dissolution device includes a rock dissolution test kettle, a pressure vessel, a liquid pump, a reaction liquid collection tank, a back pressure valve, a valve, a pipeline, a pressure display gauge, a temperature controller and a computer. The rock dissolution test kettle is composed of a portable sample holder, a high temperature and high pressure columnar reactor, a resistance wire heating jacket, a high temperature refractory board and a metal jacket. The portable sample rack is placed in a high-temperature and high-pressure resistant cylindrical reactor. The cylindrical reactor is cylindrical and hollow in the middle. The hollow part is 3 cm wide and 10 cm long. Both ends are connected with hollow metal pressure caps and sealed by threaded caps. A 200-mesh metal sintered disk is installed at one end of the hollow metal pressure cap inside the cylinder to prevent particles from entering the pipeline. The valve can be connected to the hollow metal pressure cap at one end outside the sample tube. The portable sample rack consists of a base, a sample tray and a handle. The base is designed to be 3 cm high and is a coil structure to ensure sufficient circulation of the fluid. The sample tray is a coil structure with a cross in the middle, which can be used to place experimental samples and ensure sufficient contact between the fluid and the sample. The handle is connected to the base and the sample tray to ensure that the portable sample rack is easy to place and take out in the reactor. The reaction liquid collection tank has a volume of about 2L, which is mainly used to continuously collect the reaction liquid during the reaction process; the pressure vessel is used to store the prepared formation water sample, including an upright hollow high-pressure resistant metal column, and a movable metal piston and a sealing sleeve are installed at one end connected to the liquid pump, and the sealing sleeve is connected to the liquid pump through a pipeline and a three-way valve; the hollow high-pressure resistant metal column is connected to the high-temperature and high-pressure reactor at one end, and is equipped with a detachable pressure cap, and is connected to the high-temperature and high-pressure reactor through a three-way valve. The gap between the metal piston and the detachable pressure cap in the hollow high-pressure resistant metal column is used to place the prepared formation water, with a volume of 2L; the liquid pump continuously injects pure water between the sealing sleeve and the metal piston, The pressure generated pushes the metal piston upward, thereby injecting the prepared formation water in the high-pressure container into the high-temperature and high-pressure reactor at a certain pressure or a certain flow rate to react with the carbonate rock sample; the back-pressure valve is used to control the pressure of the solution inside the reactor and the pipeline; the continuous flow liquid pump is used to boost the continuous injection of the prepared formation water inside the high-pressure container into the reactor, and can be set to an equal pressure or equal flow rate mode; the temperature controller heats the temperature of the water-rock reaction in the high-temperature and high-pressure reactor to adjust the temperature; the metal parts that contact the prepared fluid, such as the high-temperature and high-pressure tubular reactor, high-pressure container, pressure reducing valve, valve, pipeline, etc., are made of Hastelloy material; the computer is connected to the temperature controller and the back-pressure valve to realize computer monitoring and operation.

[0065] Step 2: Selection of samples for dissolution simulation experiments

[0066] The purpose of this dissolution simulation experiment is to evaluate the potential for the development of carbonate buried dissolution pores. The samples were selected from the outcrops of the Kelimoli Formation and the fourth member of the Ma Formation in the Ordos Basin. Before the simulation experiment, the mineral composition of the carbonate rock block samples was analyzed by whole-rock X-ray diffraction and physical property tests (Table 1). The percentage of calcite and the percentage of dolomite can be accurately obtained, and the first index can be accurately determined based on the percentage of calcite and the percentage of dolomite.

[0067] Table 1 X-ray diffraction whole rock analysis mineral types and contents

[0068]

[0069] Step 3: Determination of boundary conditions for dissolution simulation experiment

[0070] Since it is a buried solution pore development simulation experiment based on the dissolution intensity of carbonate minerals, the selected samples are natural carbonate rock samples (Table 1), the fluid type is 2ml / L acetic acid solution, instead of deep acidic fluid (deep carbonate buried solution pores are considered to be caused by dissolution of acidic buried diagenetic media such as organic acids), open-flow system, fluid flow rate is 3ml / min, simulated temperature is 150℃, simulated fluid pressure is 40MPa, and dissolution time is 1920min.

[0071] Step 4: Implementation and results of dissolution simulation experiment

[0072] Field emission scanning electron microscope mineral occurrence analysis was carried out before the experiment. Figure 3 and Figure 4 .

[0073] Step 5: Implementation and results of dissolution simulation experiment

[0074] It mainly uses carbonate rock mineral dissolution equipment and designs simulation experimental boundary conditions according to the third step. The four parameters of temperature, fluid pressure, flow rate and reaction time are used to conduct simulation experiments on the development of buried dissolution pores based on the dissolution intensity of carbonate minerals. The reaction production fluid is continuously collected during the experiment.

[0075] After the reaction was completed, the concentrations of calcium and magnesium ions in the reaction solution were determined by ICP-OES. After the block samples were dried, the field emission scanning electron microscope mineral occurrence analysis was performed. The in-situ mineral dissolution occurrence evolution characterization analysis was mainly carried out based on the content of the fourth step. The experimental results were Figure 5 and Figure 6 By comparing with the pre-dissolution period, more reliable data can be provided for the evaluation of the development potential of buried dissolution pores.

[0076] Once the ion concentrations before and after the reaction are determined, the second index can be accurately derived based on the determined concentrations of each ion.

[0077] Step 6: Interpretation of Dissolution Simulation Experiment Results

[0078] According to the calculation method of the first index and the second index in Example 1, and the parameter information obtained during the experiment, the first index and the second index are accurately obtained, and then the buried dissolution pore development potential of the target area is evaluated based on the first index and the second index, as shown in the evaluation parameter table of Table 2, which is as follows:

[0079] (1) Under the burial diagenetic environment (150°C, 40 MPa), the rock dissolution rate of 2% acetic acid solution on bioclastic micrite limestone is 0.12 g / cm 2 , of which the calcite dissolution rate is 0.11g / cm 2 , the dolomite dissolution rate is 0.01g / cm 2 , burial dissolution is mineral selective, and calcite dissolves preferentially.

[0080] (2) Under the burial diagenetic environment (150°C, 40 MPa), the rock dissolution rate of 2% acetic acid solution on powder crystal dolomite is 0.12 g / cm 2 , of which the calcite dissolution rate is 0.03g / cm 2 The dolomite dissolution rate is 0.09g / cm 2 , burial dissolution is mineral selective, and dolomite is preferentially dissolved.

[0081] (3) Under the burial diagenetic environment (150°C, 40 MPa), the rock dissolution rate of 2% acetic acid solution on bioclastic micrite limestone and powder crystal dolomite is 0.12 g / cm 2 The data show that the rock dissolution rates of bioclastic micrite limestone and powder crystal dolomite in deep burial environments are basically the same, and the dissolution and porosity-increasing abilities are basically the same.

[0082] Table 2 Evaluation parameters

[0083]

[0084] The technical solution of the embodiment of the present invention obtains carbonate rock block samples in the target area and detects the percentage of calcite and dolomite in the carbonate rock block samples; determines a first index based on the percentage of calcite and the percentage of dolomite, thereby accurately determining the proportion of minerals in the carbonate rock block samples; further determines a first calcium ion concentration and a first magnesium ion concentration in a preset dissolving solution, and determines a second calcium ion concentration and a second magnesium ion concentration in the preset dissolving solution after the carbonate rock block samples are completely dissolved in the preset dissolving solution, and then determines the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration and the second magnesium ion concentration based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration and the second magnesium ion concentration. The second index is determined by the magnesium ion concentration, which realizes the accurate determination of the dissolution rate of each mineral after the dissolution of the carbonate rock block sample, and also realizes the quantitative evaluation of the dissolution rate of carbonate minerals close to the geological conditions of the burial environment. Finally, based on the first index and the second index, the development potential of buried dissolution pores in the target area is evaluated, thereby solving the problem of unclear control of mineral composition on the dissolution intensity of carbonate rocks in (ultra) deep burial environments, thereby accurately evaluating the development potential of buried dissolution pores, solving the problem of inaccurate evaluation of the development potential of buried dissolution pores, and providing a theoretical basis for the evaluation of the development potential of buried dissolution pores in deep carbonate rocks.

[0085] Embodiment 3

[0086] Figure 7 A schematic diagram of a structure of a buried dissolution pore development potential evaluation device provided by an embodiment of the present invention. Figure 7 As shown, the device comprises:

[0087] The detection module 210 is used to obtain carbonate rock block samples in the target area and detect the percentage of calcite and dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness;

[0088] A first index determination module 220, configured to determine a first index based on the percentage of the calcite and the percentage of the dolomite, wherein the first index is used to describe the proportion of minerals in the carbonate rock block sample;

[0089] The ion concentration determination module 230 is used to determine a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and to determine a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample is completely dissolved in the preset dissolution solution;

[0090] A second index determination module 240, configured to determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, wherein the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution;

[0091] The evaluation module 250 is used to evaluate the development potential of buried dissolution pores in the target area based on the first index and the second index.

[0092] Optional, detection module for:

[0093] The carbonate rock block sample is analyzed by X-ray diffraction to determine the percentage of calcite and the percentage of dolomite in the carbonate rock block sample.

[0094] Optionally, the first index determination module is used to:

[0095] The ratio of the percentage of the calcite to the percentage of the dolomite is used as the first index.

[0096] Optionally, the second index determination module includes:

[0097] an ion concentration difference determining unit, configured to use a difference between the second calcium ion concentration and the first calcium ion concentration as a calcium ion concentration difference, and use a difference between the second magnesium ion concentration and the first magnesium ion concentration as a magnesium ion concentration difference;

[0098] a rate determination unit, configured to determine the flow rate of the preset dissolution solution and the reaction time of the carbonate rock block sample, and determine the calcite dissolution rate and the dolomite dissolution rate based on the flow rate, the reaction time, the calcium ion concentration difference and the magnesium ion concentration difference;

[0099] A second index determination unit is used to determine the second index based on the calcite dissolution rate and the dolomite dissolution rate.

[0100] Optionally, the second index determination unit is used to:

[0101] The ratio of the calcite dissolution rate to the dolomite dissolution rate is used as the second index.

[0102] Optional, evaluation module for:

[0103] When the second index is greater than the first index, and the second index is greater than one, the burial dissolution is mineral selective, and calcite has preferential dissolution;

[0104] When the second index is greater than the first index, and the second index is less than one, the burial dissolution is non-mineral selective;

[0105] When the second index is less than the first index, and the second index is greater than one, the burial dissolution is non-mineral selective;

[0106] When the second index is less than the first index, and the second index is less than one, the burial dissolution is mineral selective, and dolomite is preferentially dissolved.

[0107] Optionally, the preset dissolution liquid is loaded into a carbonate mineral dissolution device, so that the carbonate mineral dissolution device is used to complete the dissolution of the carbonate rock block sample.

[0108] The device for evaluating the development potential of buried dissolution holes provided in an embodiment of the present invention can execute the method for evaluating the development potential of buried dissolution holes provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0109] Embodiment 4

[0110] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0111] Figure 8 The structural schematic diagram of the electronic device that can be used to implement the buried dissolution pore development potential evaluation method of the embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0112] like Figure 8 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0113] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0114] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for evaluating the development potential of buried dissolution pores.

[0115] In some embodiments, the method for evaluating the potential for development of buried dissolution pores and caves may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for evaluating the potential for development of buried dissolution pores and caves described above may be executed. Alternatively, in other embodiments, the processor 11 may be configured to execute the method for evaluating the potential for development of buried dissolution pores and caves by any other appropriate means (e.g., by means of firmware).

[0116] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0118] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0119] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0120] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0121] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0122] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0123] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the development potential of buried dissolution pores and caves, characterized in that: include: Obtaining carbonate rock block samples in the target area, and detecting the percentage of calcite and the percentage of dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness; Determine a first index based on the percentage of the calcite and the percentage of the dolomite, wherein the first index is used to describe the proportion of minerals in the carbonate rock block sample; Determining a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and determining a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample has been completely dissolved in the preset dissolution solution; Determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, wherein the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution; The development potential of buried dissolution pores in the target area is evaluated based on the first index and the second index.

2. The method according to claim 1, characterized in that: Detecting the percentage of calcite and the percentage of dolomite in the carbonate rock block sample comprises: The carbonate rock block sample is analyzed by X-ray diffraction to determine the percentage of calcite and the percentage of dolomite in the carbonate rock block sample.

3. The method according to claim 1, characterized in that Determining a first index based on the percentage of the calcite and the percentage of the dolomite comprises: The ratio of the percentage of the calcite to the percentage of the dolomite is used as the first index.

4. The method according to claim 1, characterized in that: Determining a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration comprises: taking the difference between the second calcium ion concentration and the first calcium ion concentration as the calcium ion concentration difference, and taking the difference between the second magnesium ion concentration and the first magnesium ion concentration as the magnesium ion concentration difference; Determining the flow rate of the preset dissolution solution and the reaction time of the carbonate rock block sample, and determining the calcite dissolution rate and the dolomite dissolution rate based on the flow rate, the reaction time, the calcium ion concentration difference and the magnesium ion concentration difference; The second index is determined based on the calcite dissolution rate and the dolomite dissolution rate.

5. The method according to claim 4, characterized in that Determining the second index based on the calcium ion dissolution rate and the magnesium ion dissolution rate comprises: The ratio of the calcite dissolution rate to the dolomite dissolution rate is used as the second index.

6. The method according to claim 1, characterized in that The development potential of buried dissolution pores and caves in the target area is evaluated based on the first index and the second index, including: When the second index is greater than the first index, and the second index is greater than one, the burial dissolution is mineral selective, and calcite has preferential dissolution; When the second index is greater than the first index, and the second index is less than one, the burial dissolution is non-mineral selective; When the second index is less than the first index, and the second index is greater than one, the burial dissolution is non-mineral selective; When the second index is less than the first index, and the second index is less than one, the burial dissolution is mineral selective, and dolomite is preferentially dissolved.

7. The method according to claim 1, characterized in that The preset dissolution liquid is loaded into the carbonate mineral dissolution device, so as to utilize the carbonate mineral dissolution device to complete the dissolution of the carbonate rock block sample.

8. A device for evaluating the development potential of buried karst pores, characterized in that: include: A detection module, used to obtain carbonate rock block samples in a target area and detect the percentage of calcite and dolomite in the carbonate rock block samples, wherein the carbonate rock block samples are rock blocks with a preset diameter and a preset thickness; A first index determination module, configured to determine a first index based on the percentage of the calcite and the percentage of the dolomite, wherein the first index is used to describe the proportion of minerals in the carbonate rock block sample; an ion concentration determination module, used to determine a first calcium ion concentration and a first magnesium ion concentration in a preset dissolution solution, and to determine a second calcium ion concentration and a second magnesium ion concentration in the preset dissolution solution after the carbonate rock block sample has been completely dissolved in the preset dissolution solution; A second index determination module, configured to determine a second index based on the first calcium ion concentration, the first magnesium ion concentration, the second calcium ion concentration, and the second magnesium ion concentration, wherein the second index is used to describe the mineral dissolution rate of the carbonate rock block sample after dissolution; An evaluation module is used to evaluate the development potential of buried dissolution pores in the target area based on the first index and the second index.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for evaluating the development potential of buried dissolution pores as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for evaluating the development potential of buried dissolution pores according to any one of claims 1 to 7 when executed.

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