Method, device and equipment for determining operation pressure increasing coefficient of gas storage and medium

Abstract

The embodiment of the invention discloses a method, device and equipment for determining the operation pressure increasing coefficient of a gas storage and a medium. The method comprises the following steps: constructing a coordinate system by taking a pressure increasing operation index as an abscissa and taking breakthrough pressure and a gas storage pressure increasing coefficient as ordinates at two end points of the abscissa respectively; constructing a relation straight line between the pressure increasing coefficient and the pressure increasing operation index of the gas storage; according to a breakthrough pressure lower limit straight line corresponding to the breakthrough pressure lower limit, a pressure increasing operation lower limit straight line corresponding to the pressure increasing operation lower limit and a relation straight line, determining a pressure increasing operation area, a non-pressure increasing operation area and a non-gas storage cover layer area in the coordinate system to establish a gas storage pressure increasing operation chart; and determining the gas storage pressure increasing coefficient of the mudstone cover layer according to the gas storage pressure increasing running pattern. According to the scheme, the gas storage pressure increasing running pattern can be accurately constructed, so that the gas storage pressure increasing running condition of the target area is evaluated based on the gas storage pressure increasing running pattern, and the gas storage pressure increasing coefficient is accurately determined.

Description

Technical Field

[0001] This application relates to the field of petroleum engineering technology, and in particular to a method, apparatus, equipment and medium for determining the operating pressure coefficient of a gas storage facility. Background Technology

[0002] Caprock sealing is a key indicator for evaluating natural gas reservoir formation and gas storage facility construction. Conventional natural gas reservoir formation is an extremely slow process, while gas storage facilities are characterized by multi-cycle, intensive injection and production. Therefore, the requirements for caprock sealing are even higher for gas storage facilities than for natural gas reservoirs. Caprock sealing is not only crucial for determining whether a gas storage facility can be built, but also an important basis for evaluating the safe operation of the gas storage facility.

[0003] The main lithology of caprock in domestic oil and gas reservoirs is mudstone. The evaluation of mudstone caprock in gas reservoirs primarily references the evaluation methods and indicators used for mudstone caprock in natural gas reservoirs. Currently, the sealing performance of mudstone caprock in gas reservoirs is evaluated from both dynamic and static perspectives. Key indicators include porosity, permeability, static breakthrough pressure, diffusion coefficient, specific surface area, dynamic breakthrough pressure, rock mechanical strength, and total stress-strain permeability.

[0004] However, this evaluation method has the following problems. First, not all caprock evaluation parameters for natural gas reservoirs are applicable to gas storage facilities. Taking the caprock diffusion coefficient as an example, the diffusion time of natural gas reservoirs is measured in millions of years, and the diffusion volume is considerable; it has been reported that the natural gas diffusion volume of Anyue Gas Field reaches 92 billion cubic meters. However, the operating time of gas storage facilities is relatively short, and the diffusion volume is limited. For example, according to the caprock gas reservoir diffusion model, the natural gas diffusion volume of Wanshunchang gas storage facility after 30 years of operation is approximately 7,200 cubic meters. Second, publicly reported evaluation parameters, indicators, and methods for mudstone caprocks in gas storage facilities mainly focus on the sealing performance of mudstone caprocks under actual formation conditions, without considering the need for pressurization operation of gas storage facilities. Furthermore, the current method uses drilling and logging data, combined with experimental test results, to establish a calculation model for reservoir fracture pressure in gas storage facilities, calculating the maximum operating pressure for gas storage facility expansion. However, this method cannot intuitively demonstrate the relationship between the sealing performance of mudstone caprocks and the pressurization coefficient of gas storage facilities. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and medium for determining the pressure boosting coefficient of a gas storage facility, so as to accurately determine the relationship between the pressure boosting coefficient of the gas storage facility and the breakthrough pressure and pressure boosting operation indicators, and to intuitively display the relationship.

[0006] According to one aspect of this application, a method for determining the pressure boosting coefficient of a gas storage facility is provided, the method comprising:

[0007] A coordinate system is constructed by using the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis.

[0008] Construct a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and plot the relationship line between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system according to the mathematical relationship.

[0009] Based on the lower limit of the breakthrough pressure corresponding to the lower limit of the breakthrough pressure, the lower limit of the pressure boosting operation corresponding to the lower limit of the pressure boosting operation, and the aforementioned relationship line, a pressure boosting operation map of the gas storage facility is established in the coordinate system, defining the pressure boosting operation zone, the non-pressure boosting operation zone, and the non-gas storage cap layer zone. The pressure boosting coefficient of the gas storage facility in the mudstone cap layer is then determined based on the gas storage pressure boosting operation map.

[0010] According to one aspect of this application, a device for determining the operating pressure boosting coefficient of a gas storage facility is provided, the device comprising:

[0011] The coordinate system construction module is used to construct a coordinate system by taking the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the two endpoints of the horizontal axis, respectively.

[0012] The relationship line drawing module is used to construct the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and to draw the relationship line between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system according to the mathematical relationship.

[0013] The gas storage pressurization operation chart establishment module is used to determine the pressurization operation zone, non-pressurization operation zone, and non-gas storage caprock zone in the coordinate system based on the breakthrough pressure lower limit line corresponding to the breakthrough pressure lower limit line, the pressurization operation lower limit line corresponding to the pressurization operation lower limit line, and the relationship line, and to establish the gas storage pressurization operation chart, so as to determine the gas storage pressurization coefficient of the mudstone caprock based on the gas storage pressurization operation chart.

[0014] According to another aspect of this application, an electronic device is provided, the electronic device comprising:

[0015] At least one processor; and

[0016] Memory connected to at least one processor for data processing; wherein,

[0017] The memory stores a computer program that can be executed by at least one processor, which enables the at least one processor to perform the gas storage tank operation pressure coefficient determination method according to any embodiment of this application.

[0018] According to another aspect of this application, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute the gas storage tank operation pressure coefficient determination method of any embodiment of this application.

[0019] The technical solution of this application embodiment constructs a coordinate system by using the pressure boosting operation index as the abscissa and the breakthrough pressure and the gas storage pressure boosting coefficient as the ordinates at the two endpoints of the abscissa. A mathematical relationship is established between the gas storage pressure boosting coefficient and the pressure boosting operation index. Based on this mathematical relationship, a straight line is drawn in the coordinate system to represent the relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index. Using the breakthrough pressure lower limit line, the pressure boosting operation lower limit line, and the relationship line, a pressure boosting operation zone, a non-pressure boosting operation zone, and a non-gas storage caprock zone are determined in the coordinate system to establish a gas storage pressure boosting operation map. The pressure boosting coefficient of the gas storage in the mudstone caprock is then determined based on this map. This solution accurately determines the relationship between the gas storage pressure boosting coefficient and the breakthrough pressure and pressure boosting operation index, and provides a visually intuitive display of the gas storage pressure boosting operation map. This allows for the evaluation of the gas storage pressure boosting operation in the target area based on the map, and the accurate determination of the gas storage pressure boosting coefficient.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A flowchart illustrating a method for determining the pressure boosting coefficient of a gas storage facility, as provided in this application embodiment;

[0023] Figure 2 A flowchart illustrating a method for determining the pressure boosting coefficient of a gas storage facility, as provided in another embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a gas storage tank pressurization operation provided in another embodiment of this application;

[0025] Figure 4 A flowchart illustrating a method for determining the pressure boosting coefficient of a gas storage facility, as provided in another embodiment of this application;

[0026] Figure 5 A schematic diagram of a device for determining the operating pressure boosting coefficient of a gas storage facility, provided in an embodiment of this application;

[0027] Figure 6This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," "third," "fourth," "actual," "preset," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1 This application provides a flowchart of a method for determining the pressure boosting coefficient of a gas storage facility. This application embodiment is applicable to situations where a gas storage facility pressure boosting operation chart is established to evaluate the pressure boosting operation of mudstone caprock in a target area based on the chart. This method can be executed by a gas storage facility pressure boosting coefficient determining device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0031] S110. Construct a coordinate system with the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis.

[0032] Among them, the pressurization operation index of a gas storage facility refers to a series of indicators that optimize the operation effect by increasing the pressure of the gas storage facility during operation. In the embodiments of this application, the pressurization operation index is represented by breakthrough pressure and hydrostatic pressure. Breakthrough pressure refers to the pressure that the capillary dynamic sealing capacity of the caprock reaches its limit under the alternating stress of cyclic injection and production in the gas storage facility. Breakthrough pressure is an important parameter for evaluating the dynamic sealing capacity of the capillary caprock under the cyclic injection and production conditions of the gas storage facility. It reflects the caprock's ability to resist gas penetration during the cyclic injection and production process of the gas storage facility. Breakthrough pressure is obtained through experiments and model calculations, mainly depending on factors such as the lithology, clay content, porosity, permeability, and micropore throat distribution of the caprock. The gas storage facility pressurization coefficient is the ratio of the total volume of the gas storage equipment to the average daily gas supply capacity in the peak month. Specifically, it represents the ratio of the average daily gas supply capacity of the gas storage equipment in the peak month to its total volume. This coefficient can help assess the efficiency and capacity utilization of the gas storage equipment. The gas storage facility pressurization coefficient is of great significance in gas storage facility management. By calculating and monitoring this coefficient, we can better understand the operating status of gas storage facilities, ensure their gas supply capacity during peak periods, and thus optimize the operation and management of gas storage facilities. Furthermore, the pressure boosting coefficient can also be used to simulate and predict the gas extraction process, helping to develop reasonable extraction plans and improve extraction efficiency.

[0033] In this embodiment, it is necessary to evaluate the pressurization operation of the gas storage facility, and to determine the relationship between the pressurization coefficient, breakthrough pressure, and pressurization operation indicators. To more intuitively illustrate the relationship between the pressurization coefficient, breakthrough pressure, and pressurization operation indicators, a coordinate system can be established to display this relationship. Specifically, since there is a certain relationship between breakthrough pressure and pressurization operation indicators, and a certain relationship between pressurization operation indicators and the pressurization coefficient, the pressurization operation indicators can be used as the horizontal axis. Breakthrough pressure and the pressurization coefficient can be linked in the middle, and breakthrough pressure and the pressurization coefficient can be used as the vertical axes at the two endpoints of the horizontal axis, thus constructing the coordinate system.

[0034] S120. Construct a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and draw a straight line in the coordinate system based on the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index.

[0035] For example, in order to represent the relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index in a coordinate system, a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index can be constructed, and a straight line relating the gas storage pressure boosting coefficient and the pressure boosting operation index can be plotted in the coordinate system based on the mathematical relationship, thereby representing the relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system.

[0036] For example, the mathematical relationship between the gas storage tank pressurization coefficient and the pressurization operation indicators can be determined based on the following formula:

[0037] Ce=0.7038*((Pt+Pw) / Pw)+0.1586;

[0038] Where Pw represents hydrostatic pressure, Ce is the gas storage pressure boosting coefficient, (Pt+Pw) / Pw is the pressure boosting operation index, and Pt is the breakthrough pressure.

[0039] S130. Based on the lower limit of the breakthrough pressure corresponding to the lower limit of the breakthrough pressure, the lower limit of the pressure boosting operation corresponding to the lower limit of the pressure boosting operation, and the relationship line, determine the pressure boosting operation zone, the non-pressure boosting operation zone, and the non-gas storage cap layer zone in the coordinate system to establish a gas storage pressure boosting operation map, so as to determine the gas storage pressure boosting coefficient of the mudstone cap layer according to the gas storage pressure boosting operation map.

[0040] For example, in a coordinate system, the lower limit of the breakthrough pressure line corresponding to the lower limit of the breakthrough pressure can be determined, that is, the line where the breakthrough pressure is always at the lower limit of the breakthrough pressure. Similarly, the lower limit of the pressure-boosting operation line corresponding to the lower limit of the pressure-boosting operation line can be determined, that is, the line where the pressure-boosting operation index is always at the lower limit of the pressure-boosting operation line. Based on the lower limit of the breakthrough pressure line, the lower limit of the pressure-boosting operation line, and the relationship line, the coordinate system can be divided into regions to determine the pressure-boosting operation zone, the non-pressure-boosting operation zone, and the non-gas storage caprock zone. A gas storage pressure-boosting operation map is then established. The pressure-boosting operation zone, the non-pressure-boosting operation zone, and the non-gas storage caprock zone are clearly and intuitively marked on the gas storage pressure-boosting operation map. Subsequently, based on the location of the measurement points in the mudstone caprock, the gas storage pressure-boosting operation status in the mudstone caprock can be determined, the gas storage pressure-boosting operation status in the mudstone caprock of that region can be evaluated, and the gas storage pressure-boosting operation coefficient can be determined.

[0041] In this embodiment of the application, the process of determining the lower limit of the breakthrough pressure includes:

[0042] Establish the relationship between the breakthrough pressure and rock permeability;

[0043] Set the rock permeability to its maximum value, and calculate the lower limit of the breakthrough pressure based on the relationship between the breakthrough pressure and the rock permeability.

[0044] The process for determining the lower limit of the pressure-boosting operation includes:

[0045] The relationship between the pressure-boosting operation index and the breakthrough pressure is determined based on the following formula:

[0046] P = (P t +P w ) / P wWherein, P is the pressure-boosting operation index, P t For the aforementioned breakthrough pressure, P w It is the hydrostatic pressure;

[0047] Substituting the lower limit of the breakthrough pressure into the formula, we obtain the lower limit of the pressure-boosting operation.

[0048] For example, the lower limit of the breakout pressure Pt is calculated as follows:

[0049] Based on the breakthrough pressure measurement data of mudstone caprock in major domestic gas storage facilities, a mathematical relationship between breakthrough pressure Pt and rock permeability K is established: Pt = 3.5833 * K - 0.142.

[0050] Since the permeability of the mudstone caprock is less than 0.1 mD, the breakthrough pressure Pt of mudstone with a permeability of 0.1 mD is calculated to be 5 MPa. 5 MPa is selected as the lower limit of the breakthrough pressure of the favorable caprock of the gas storage facility.

[0051] Furthermore, the lower limit for calculating the pressure boosting operation index (Pt+Pw) / Pw includes:

[0052] Based on measured data from existing gas storage facilities in China, the mathematical relationship between the pressure boosting operation index (Pt+Pw) / Pw and the breakthrough pressure Pt is established as follows: (Pt+Pw) / Pw=0.0132*Pt+1.1219;

[0053] When the lower limit of the pressure is 5MPa, the calculated pressure-boosting operation index (Pt+Pw) / Pw is 1.2. Therefore, 1.2 is set as the lower limit of the pressure-boosting operation index (Pt+Pw) / Pw.

[0054] The technical solution of this application embodiment constructs a coordinate system by using the pressure boosting operation index as the abscissa and the breakthrough pressure and the gas storage pressure boosting coefficient as the ordinates at the two endpoints of the abscissa. A mathematical relationship is established between the gas storage pressure boosting coefficient and the pressure boosting operation index. Based on this mathematical relationship, a straight line is drawn in the coordinate system to represent the relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index. Using the breakthrough pressure lower limit line, the pressure boosting operation lower limit line, and the relationship line, a pressure boosting operation zone, a non-pressure boosting operation zone, and a non-gas storage caprock zone are determined in the coordinate system to establish a gas storage pressure boosting operation map. The pressure boosting coefficient of the gas storage in the mudstone caprock is then determined based on this map. This solution accurately determines the relationship between the gas storage pressure boosting coefficient and the breakthrough pressure and pressure boosting operation index, and provides a visually intuitive display of the gas storage pressure boosting operation map. This allows for the evaluation of the gas storage pressure boosting operation in the target area based on the map, and the accurate determination of the gas storage pressure boosting coefficient.

[0055] Figure 2 This is a flowchart illustrating a method for determining the pressure boosting coefficient of a gas storage facility, provided as another embodiment of this application. This embodiment is an optimization based on the above embodiment; solutions not described in detail in this embodiment are found in the above embodiment. Figure 2 As shown, the method in this embodiment of the application specifically includes the following steps:

[0056] S210. Construct a coordinate system with the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis.

[0057] S220. Construct a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and draw a straight line in the coordinate system based on the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index.

[0058] S230. The region between the line representing the lower limit of the breakthrough pressure and the horizontal axis in the coordinate system shall be taken as the non-gas storage capping layer region.

[0059] For example, such as Figure 3 As shown, assuming the lower limit of the breakthrough pressure is 5 MPa, then the straight line that is always equal to 5 MPa is the lower limit breakthrough pressure line. The area between the lower limit breakthrough pressure line and the horizontal axis is considered the non-gas storage cap layer area, which is... Figure 3 Region III in the middle.

[0060] S240. The area between the lower limit line of the pressurization operation and the pressurization operation coordinate axis in the coordinate system, excluding the area of ​​the non-gas storage cover layer, is taken as the non-pressurization operation area.

[0061] For example, assuming the lower limit of pressurization operation is 1.2, then the straight line that is always equal to 1.2 is the lower limit line of pressurization operation. The area between the lower limit line of pressurization operation and the pressurization operation coordinate axis, excluding the area outside the gas storage cap layer, is regarded as the non-pressurization operation area. Figure 3 Region II in the middle.

[0062] S250. Remove the non-gas storage cover area and the non-pressurization operation area from the area enclosed by the relationship line, the gas storage pressure coefficient coordinate axis, and the horizontal axis, and use this area as the pressurization operation area.

[0063] For example, the region enclosed by the gas storage tank pressurization coefficient coordinate axis and the horizontal axis, excluding the non-gas storage tank cover area and the non-pressurization operation area, represents the area where pressurization operation is permitted. This area is designated as the pressurization operation area. Figure 3 Region I in the text.

[0064] S260. Establish a gas storage pressurization operation chart to determine the gas storage pressurization coefficient of the mudstone caprock based on the gas storage pressurization operation chart.

[0065] For example, after dividing the coordinate system into various regions, a gas storage pressurization operation chart is formed. Based on the gas storage pressurization operation chart, the gas storage pressurization coefficient of the mudstone caprock in the target area can be determined, and the pressurization operation of the gas storage in the mudstone caprock in the target area can be evaluated.

[0066] This application provides a method for determining the pressure boosting coefficient of a gas storage facility. The method defines the region between the lower limit of the breakthrough pressure line and the horizontal axis in the coordinate system as the non-gas storage caprock region. The region between the lower limit of the pressure boosting operation line and the pressure boosting operation coordinate axis, excluding the non-gas storage caprock region, is defined as the non-pressure boosting operation region. The region enclosed by the relationship line, the gas storage pressure boosting coefficient coordinate axis, and the horizontal axis, excluding the non-gas storage caprock region and the non-pressure boosting operation region, is defined as the pressure boosting operation region. This method visually divides the coordinate system into regions, forming a gas storage facility pressure boosting operation map. This facilitates the subsequent determination of the gas storage facility pressure boosting status and data in the target area's mudstone caprock based on the location of measurement points in the target area within the gas storage facility pressure boosting operation map.

[0067] Figure 4 This is a flowchart illustrating a method for determining the pressure boosting coefficient of a gas storage facility, provided as another embodiment of this application. This embodiment is an optimization based on the above embodiments; schemes not described in detail in this embodiment are found in the above embodiments. Figure 4 As shown, the method in this embodiment of the application specifically includes the following steps:

[0068] S310. Construct a coordinate system with the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis.

[0069] S320. Construct a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and draw a straight line in the coordinate system based on the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index.

[0070] S330. Based on the lower limit of the breakthrough pressure corresponding to the lower limit of the breakthrough pressure, the lower limit of the pressure boosting operation corresponding to the lower limit of the pressure boosting operation, and the relationship line, determine the pressure boosting operation area, the non-pressure boosting operation area, and the non-gas storage cap layer area in the coordinate system to establish a gas storage pressure boosting operation chart, so as to determine the gas storage pressure boosting coefficient of the mudstone cap layer according to the gas storage pressure boosting operation chart.

[0071] S340. For the target area, obtain mudstone cap rock cores at different locations, and obtain cylindrical samples of a preset size based on the mudstone cap rock cores.

[0072] For example, mudstone cap rock cores can be obtained from different locations in a target area, and the mudstone cap rock cores can be drilled and ground to obtain cylindrical samples of a preset size. Specifically, they can be drilled and ground into cylindrical samples that are only 2.5 cm long and 5 cm high.

[0073] S350. Determine the breakthrough pressure and pressure boosting operation index of the cylindrical sample. Based on the breakthrough pressure and pressure boosting operation index of the cylindrical sample and the pressure boosting operation chart of the gas storage facility, determine the evaluation result of the pressure boosting operation of the gas storage facility in the mudstone caprock of the target area.

[0074] For example, the breakthrough pressure and pressurization operation indicators of the cylindrical sample are determined, and these indicators are marked on the pressurization operation chart of the gas storage facility to determine the area where the measurement point of the cylindrical sample is located. Specifically, the breakthrough pressure of the cylindrical sample can be determined based on the rock gas breakthrough pressure measurement method, and then the pressurization operation indicators can be determined.

[0075] In this embodiment of the application, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area are determined based on the breakthrough pressure of the cylindrical sample, the pressurization operation index, and the gas storage pressurization operation chart, including:

[0076] Based on the breakthrough pressure and pressurization operation indicators of the cylindrical sample, the corresponding measurement points of the cylindrical sample are plotted on the pressurization operation chart of the gas storage facility.

[0077] Based on the measurement points corresponding to cylindrical samples at different locations, which are located in the areas of the gas storage pressurization operation chart, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area are determined.

[0078] For example, such as Figure 3 As shown, the breakthrough pressure and pressurization operation indicators of cylindrical samples at different locations can be marked on the gas storage pressurization operation chart, and the measurement points corresponding to the cylindrical samples can be plotted, with one measurement point corresponding to each cylindrical sample at one location. Based on the region where the measurement points of the cylindrical samples are located on the gas storage pressurization operation chart, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area can be determined.

[0079] In this embodiment of the application, the evaluation result of the gas storage pressurization operation of the mudstone caprock in the target area is determined based on the location of the measurement points corresponding to the cylindrical samples at different locations within the area shown on the gas storage pressurization operation chart. This includes:

[0080] If the ratio of the number of measuring points in the pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be ready for pressurization operation.

[0081] If the ratio of the number of measuring points in the non-pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be a favorable caprock and pressurization operation is not allowed.

[0082] If the ratio of the number of measurement points located in the non-gas storage caprock area to the total number of measurement points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be located in the non-gas storage caprock area and cannot be pressurized.

[0083] For example, the preset ratio can be determined based on actual conditions, such as 90%. If the ratio of the number of measurement points located in the pressurization operation zone to the total number of measurement points exceeds the preset ratio, it indicates that most measurement points are located in the pressurization operation zone, and the mudstone caprock in the target area is determined to be suitable for pressurization operation. If the ratio of the number of measurement points located in the non-pressurization operation zone to the total number of measurement points exceeds the preset ratio, it indicates that most measurement points are located in the non-pressurization operation zone, and the mudstone caprock in the target area is determined to be a favorable caprock and not suitable for pressurization operation. If the ratio of the number of measurement points located in the non-pressurization operation zone to the total number of measurement points exceeds the preset ratio, it indicates that most measurement points are located in the non-gas reservoir caprock area, and the mudstone caprock in the target area is determined to be in the non-gas reservoir caprock area and not suitable for pressurization operation.

[0084] It should be noted that the premise of making judgments based on the above principles is that the collection locations of each cylindrical sample are evenly distributed in space and can represent the characteristics of the mudstone cover layer of the entire target area.

[0085] In this embodiment of the application, the method further includes:

[0086] If the ratio of the number of measurement points in the pressurization operation zone to the total number of measurement points exceeds a preset ratio, then the first measurement point with the smallest pressurization operation index and the second measurement point with the largest pressurization operation index in the pressurization operation zone are determined.

[0087] Draw a first straight line perpendicular to the horizontal axis through the first measurement point, and draw a second straight line perpendicular to the horizontal axis through the second measurement point;

[0088] Based on the first intersection point of the first straight line and the relationship line, and the second intersection point of the second straight line and the relationship line, the range of gas storage pressure boosting coefficients for the mudstone caprock in the target area is determined.

[0089] For example, if the ratio of the number of measurement points located in the pressure-boosting operation zone to the total number of measurement points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be located in the pressure-boosting operation zone, and pressure boosting operation can be performed. The pressure-boosting operation coefficient is then further determined. Specifically, among the measurement points of the cylindrical sample in the target area, the first measurement point with the smallest pressure-boosting operation index and the second measurement point with the largest pressure-boosting operation index are determined. A first straight line perpendicular to the horizontal axis is drawn through the first measurement point, and a second straight line perpendicular to the horizontal axis is drawn through the second measurement point. Based on the gas storage pressure boosting coefficient corresponding to the first intersection point of the first straight line and the relationship line, and the second intersection point of the second straight line and the relationship line, the range of the gas storage pressure boosting coefficient for the mudstone caprock in the target area is determined. For example, as shown... Figure 3 As shown, for the Dagang area, a straight line perpendicular to the horizontal axis is drawn from the first measurement point with the smallest pressure boosting index and the second measurement point with the largest pressure boosting index. The intersection of this line with the straight line corresponds to the gas storage pressure boosting coefficient, which is the endpoint of the range of gas storage pressure boosting coefficients for the mudstone caprock in the Dagang area. For example, the range of gas storage pressure boosting coefficients for the Dagang area is 1.0 to 1.34, for the Daqing area it is 1.0 to 1.43, and for the Mabei area it is 1.0 to 1.48.

[0090] This application provides a method for determining the pressure boosting coefficient of a gas storage facility. For a target area, core samples of mudstone caprock at different locations are obtained, and cylindrical samples of a predetermined size are obtained from these core samples. The breakthrough pressure and pressure boosting operation indicators of the cylindrical samples are determined. Based on the breakthrough pressure, pressure boosting operation indicators, and the gas storage facility's pressure boosting operation chart, the evaluation result of the gas storage facility's pressure boosting operation in the mudstone caprock of the target area is determined. This method can mark the actual breakthrough pressure and pressure boosting operation indicators of cylindrical samples at different locations in the target area on the gas storage facility's pressure boosting operation chart to form measurement points. Based on the area where the measurement points are located, the evaluation result of whether the target area is suitable for pressure boosting operation and the gas storage facility's pressure boosting coefficient are determined.

[0091] This application provides a specific implementation and effect of a method for determining the pressure boosting coefficient of a gas storage facility. This application is an optimization based on the above embodiments; solutions not described in detail in this application are found in the above embodiments. The method of this application specifically includes the following steps:

[0092] S1. Determine the parameter limits;

[0093] Calculate the lower limit of the breakthrough pressure Pt, the lower limit of the pressure boosting operation index (Pt+Pw) / Pw, and establish the mathematical relationship between the upper limit of the gas storage pressure boosting coefficient Ce and the pressure boosting operation index (Pt+Pw) / Pw:

[0094] Ce = 0.7038 * ((Pt + Pw) / Pw) + 0.1586, where Pw represents hydrostatic pressure.

[0095] S2. Using the pressure boosting operation index (Pt+Pw) / Pw as the horizontal axis, and based on the parameter limits determined in step S1, construct an evaluation chart between the pressure boosting operation index (Pt+Pw) / Pw and the upper limit Ce of the gas storage pressure boosting coefficient and the breakthrough pressure Pt, so as to evaluate the sealing performance of the mudstone caprock and the pressure boosting operation of the gas storage.

[0096] Specifically, the region between the line indicating the lower limit of pressure and the horizontal axis in the coordinate system is defined as the non-gas storage cover area; the region between the line indicating the lower limit of pressure operation and the pressure operation coordinate axis in the coordinate system, excluding the non-gas storage cover area, is defined as the non-pressure operation area; and the region enclosed by the relationship line, the gas storage pressure coefficient coordinate axis, and the horizontal axis, excluding the non-gas storage cover area and the non-pressure operation area, is defined as the pressure operation area.

[0097] S3, Sample preparation;

[0098] Multiple mudstone cap rock cores from different locations were selected and drilled into cylindrical samples of fixed size.

[0099] S4, Breakthrough pressure measurement;

[0100] The breakthrough pressure Pt of the caprock was determined based on the cylindrical sample.

[0101] S5. Plot the measurement results on the evaluation chart;

[0102] By combining the hydrostatic pressure Pw and breakthrough pressure Pt of the caprock, multiple corresponding measurement points are plotted on the evaluation chart to obtain the measurement point distribution results.

[0103] S6. Based on the distribution results of measurement points at multiple different locations on the evaluation chart, evaluate the sealing performance of the mudstone caprock and the pressurization operation of the gas storage facility.

[0104] By constructing the distribution results of measurement points at multiple different locations through multi-point sampling, a relatively accurate estimate can be made of the range within which the gas storage facility can operate under increased pressure.

[0105] Furthermore, in step S3, drilling and grinding a cylindrical sample to a fixed size specifically refers to drilling and grinding it into a cylinder with a diameter of 2.5 cm and a height of 5 cm. Standardizing the shape and size of the sample ensures the consistency and repeatability of the test results. The cylindrical shape facilitates various physical and chemical tests, and the cylindrical sample can better simulate the actual conditions of an underground gas storage facility, as rocks typically experience pressure from all directions. On the other hand, selecting a rock core as the sample ensures that the test results reflect the geological characteristics of the actual gas storage caprock, since the rock core comes directly from the caprock of the underground gas storage facility.

[0106] Further, in step S4, the determination of the breakthrough pressure Pt of the caprock based on the cylindrical sample refers to the determination of the breakthrough pressure Pt of the caprock in accordance with SYT 5748-2013 "Method for Determining Gas Breakthrough Pressure in Rocks".

[0107] Furthermore, based on the distribution results of measurement points at multiple different locations on the evaluation chart, the steps for evaluating the sealing performance of the mudstone caprock and the pressurization coefficient of the gas storage reservoir include:

[0108] When multiple measurement points at different locations are mostly concentrated in the pressurization operation zone, it means that pressurization can be carried out. The range of pressurization corresponds to the region of the upper limit Ce coordinate axis of the gas storage pressurization coefficient corresponding to the multiple measurement points at different locations.

[0109] When the distribution of multiple measurement points at different locations is mostly concentrated in the non-gas storage cap layer area, it indicates that the mudstone cap layer has poor sealing performance.

[0110] When multiple measurement points from different locations are mostly concentrated in the non-pressure-lifting operation area, it indicates that the current mudstone caprock is a favorable caprock, but pressure-lifting operation is not feasible. The specific criteria for determining whether multiple measurement points from different locations are mostly concentrated in a certain area can be determined based on the actual measurement needs on site.

[0111] Specifically, such as Figure 3 As shown, based on the distribution of the sealing data of the mudstone caprock in the gas storage tank on the chart, it is determined whether it is a favorable caprock, whether it can be pressurized, and the range of the pressurization coefficient. Figure 3 Zone III is the non-gas storage cap layer zone, belonging to poor or non-cap layer; Zone II is the non-pressurization operation zone, belonging to favorable cap layer, but pressurization is not allowed; Zone I is the pressurization operation zone, pressurization is allowed; among them, the area between Zone I and Zone II is the pressurization zone, and the upper limit of pressurization is the upper limit value of its corresponding (Pt+Pw) / Pw.

[0112] In practical applications, for example, the distribution of measurement points at multiple locations in the mudstone caprock of the Dagang, Daqing, and Mabei blocks is mostly concentrated in Zone I, indicating that pressure can be increased. Specifically, the pressure increase coefficient ranges are: 1.0–1.34 for the Dagang block, 1.0–1.43 for the Daqing block, and 1.0–1.48 for the Mabei block.

[0113] Figure 5 This is a schematic diagram of a device for determining the operating pressure boosting coefficient of a gas storage facility, provided in an embodiment of this application. This device can execute the method for determining the operating pressure boosting coefficient of a gas storage facility provided in any embodiment of this application, and possesses the corresponding functional modules and beneficial effects of the method. Figure 5 As shown, the device includes:

[0114] The coordinate system construction module 410 is used to construct a coordinate system by taking the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis.

[0115] The relationship line drawing module 420 is used to construct the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and to draw the relationship line between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system according to the mathematical relationship.

[0116] The gas storage pressurization operation chart establishment module 430 is used to establish a gas storage pressurization operation chart in the coordinate system based on the breakthrough pressure lower limit line corresponding to the breakthrough pressure lower limit line, the pressurization operation lower limit line corresponding to the pressurization operation lower limit line, and the relationship line, to determine the pressurization operation zone, non-pressurization operation zone, and non-gas storage cap layer zone, so as to determine the gas storage pressurization coefficient of the mudstone cap layer based on the gas storage pressurization operation chart.

[0117] In this embodiment of the application, the gas storage pressurization operation map establishment module 430 determines the pressurization operation zone, the non-pressurization operation zone, and the non-gas storage cap layer zone in the coordinate system based on the breakthrough pressure lower limit line corresponding to the breakthrough pressure lower limit, the pressurization operation lower limit line corresponding to the pressurization operation lower limit, and the relationship line, including:

[0118] The region between the line representing the lower limit of the breakthrough pressure and the horizontal axis in the coordinate system is defined as the non-gas storage cap layer region.

[0119] The non-pressurization operation zone is defined as the area between the lower limit line of the pressurization operation and the pressurization operation coordinate axis in the coordinate system, excluding the area of ​​the non-gas storage cover layer.

[0120] The region enclosed by the relationship line, the gas storage pressure boosting coefficient coordinate axis, and the horizontal axis, excluding the non-gas storage cover layer region and the non-pressure boosting operation region, is defined as the pressure boosting operation region.

[0121] In this embodiment of the application, the device further includes:

[0122] The relation establishment module is used to establish the relationship between the breakthrough pressure and rock permeability.

[0123] The calculation module is used to maximize the rock permeability and calculate the lower limit of the breakthrough pressure based on the relationship between the breakthrough pressure and the rock permeability.

[0124] The device further includes:

[0125] The relationship determination module is used to determine the relationship between the pressure-boosting operation index and the breakthrough pressure based on the following formula:

[0126] P = (P t +P w ) / P w Wherein, P is the pressure-boosting operation index, P t For the aforementioned breakthrough pressure, P w It is the hydrostatic pressure;

[0127] The pressure-boosting operation lower limit determination module is used to input the breakthrough pressure lower limit into the formula to obtain the pressure-boosting operation lower limit.

[0128] In this embodiment of the application, the device further includes:

[0129] The acquisition module is used to acquire mudstone cap rock cores at different locations in the target area, and obtain cylindrical samples of a preset size based on the mudstone cap rock cores;

[0130] The evaluation result determination module is used to determine the breakthrough pressure and pressurization operation index of the cylindrical sample. Based on the breakthrough pressure and pressurization operation index of the cylindrical sample and the pressurization operation chart of the gas storage, the evaluation result of the pressurization operation of the gas storage in the mudstone caprock of the target area is determined.

[0131] In this embodiment of the application, the evaluation result determination module determines the gas storage pressurization operation evaluation result of the mudstone caprock in the target area based on the breakthrough pressure of the cylindrical sample, the pressurization operation index, and the gas storage pressurization operation chart, including:

[0132] Based on the breakthrough pressure and pressurization operation indicators of the cylindrical sample, the corresponding measurement points of the cylindrical sample are plotted on the pressurization operation chart of the gas storage facility.

[0133] Based on the measurement points corresponding to cylindrical samples at different locations, which are located in the areas of the gas storage pressurization operation chart, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area are determined.

[0134] In this embodiment of the application, the evaluation result determination module determines the gas storage pressurization operation evaluation result of the mudstone caprock in the target area based on the location of the measurement points corresponding to the cylindrical samples at different locations within the area shown on the gas storage pressurization operation chart. This includes:

[0135] If the ratio of the number of measuring points in the pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be ready for pressurization operation.

[0136] If the ratio of the number of measuring points in the non-pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be a favorable caprock and pressurization operation is not allowed.

[0137] If the ratio of the number of measurement points located in the non-gas storage caprock area to the total number of measurement points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be located in the non-gas storage caprock area and cannot be pressurized.

[0138] In this embodiment of the application, the device further includes:

[0139] The measurement point determination module is used to determine the first measurement point with the smallest pressure-lifting operation index and the second measurement point with the largest pressure-lifting operation index in the pressure-lifting operation area if the ratio of the number of measurement points in the pressure-lifting operation area to the total number of measurement points exceeds a preset ratio.

[0140] The straight line determination module is used to draw a first straight line perpendicular to the horizontal coordinate axis through the first measurement point, and a second straight line perpendicular to the horizontal coordinate axis through the second measurement point;

[0141] The range determination module is used to determine the range of gas storage pressure boosting coefficients for the mudstone caprock in the target area based on the first intersection point of the first straight line and the relationship straight line, and the gas storage pressure boosting coefficients corresponding to the second intersection point of the second straight line and the relationship straight line.

[0142] The gas storage facility operation pressure boosting coefficient determination device provided in this application embodiment can execute the gas storage facility operation pressure boosting coefficient determination method provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects of the execution method.

[0143] Figure 6A schematic diagram of the structure of an electronic device 10 that can be used to implement embodiments of this application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, 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 processors, cellular phones, smartphones, 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 merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0144] like Figure 6 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, connected to the at least one processor 11 for data processing. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0145] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and data processing unit 19, such as network card, modem, wireless data processing transceiver, etc. Data processing unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0146] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, central processing unit (CPU), graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the method for determining the pressure boosting coefficient in gas storage operation.

[0147] In some embodiments, the method for determining the operating pressure boost factor of a gas storage facility can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or data processing unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for determining the operating pressure boost factor of a gas storage facility described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method for determining the operating pressure boost factor of a gas storage facility by any other suitable means (e.g., by means of firmware).

[0148] Various embodiments 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-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0149] Computer programs used to implement the methods of this application 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 gas storage facility operating pressure coefficient determination device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0150] In the context of this application, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0151] To provide interaction with a user, the systems and techniques described herein can 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 pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0152] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected through digital data processing (e.g., data processing networks) of any form or medium. Examples of data processing networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0153] A computing system can include clients and servers. Clients and servers are generally geographically separated and typically interact via data processing networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0154] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired information of the technical solution of this application can be achieved, and this is not limited herein.

[0155] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for determining the pressure boosting coefficient of a gas storage facility, characterized in that, The method includes: A coordinate system is constructed by using the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the vertical axes at the two endpoints of the horizontal axis. Construct a mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and plot the relationship line between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system according to the mathematical relationship. Based on the lower limit of the breakthrough pressure corresponding to the lower limit of the breakthrough pressure, the lower limit of the pressure boosting operation corresponding to the lower limit of the pressure boosting operation, and the aforementioned relationship line, a pressure boosting operation map of the gas storage facility is established in the coordinate system, defining the pressure boosting operation zone, the non-pressure boosting operation zone, and the non-gas storage cap layer zone. The pressure boosting coefficient of the gas storage facility in the mudstone cap layer is then determined based on the gas storage pressure boosting operation map.

2. The method according to claim 1, characterized in that, Based on the lower limit of the breakthrough pressure corresponding to the lower limit of the breakthrough pressure, the lower limit of the boosting operation corresponding to the lower limit of the boosting operation, and the aforementioned relationship line, the boosting operation zone, the non-boosting operation zone, and the non-gas storage cap layer zone are determined in the coordinate system, including: The region between the line representing the lower limit of the breakthrough pressure and the horizontal axis in the coordinate system is defined as the non-gas storage cap layer region. The non-pressurization operation zone is defined as the area between the lower limit line of the pressurization operation and the pressurization operation coordinate axis in the coordinate system, excluding the area of ​​the non-gas storage cover layer. The region enclosed by the relationship line, the gas storage pressure boosting coefficient coordinate axis, and the horizontal axis, excluding the non-gas storage cover layer region and the non-pressure boosting operation region, is defined as the pressure boosting operation region.

3. The method according to claim 1, characterized in that, The process of determining the lower limit of the breakthrough pressure includes: Establish the relationship between the breakthrough pressure and rock permeability; Set the rock permeability to its maximum value, and calculate the lower limit of the breakthrough pressure based on the relationship between the breakthrough pressure and the rock permeability. The process for determining the lower limit of the pressure-boosting operation includes: The relationship between the pressure-boosting operation index and the breakthrough pressure is determined based on the following formula: P = (P t +P w ) / P w Wherein, P is the pressure-boosting operation index, P t For the aforementioned breakthrough pressure, P w It is the hydrostatic pressure; Substituting the lower limit of the breakthrough pressure into the formula, we obtain the lower limit of the pressure-boosting operation.

4. The method according to claim 1, characterized in that, The method further includes: For the target area, mudstone cap rock cores were obtained at different locations, and cylindrical samples of a predetermined size were obtained based on the mudstone cap rock cores. Determine the breakthrough pressure and pressurization operation indicators of the cylindrical sample. Based on the breakthrough pressure and pressurization operation indicators of the cylindrical sample and the pressurization operation chart of the gas storage facility, determine the evaluation results of the pressurization operation of the gas storage facility in the mudstone caprock of the target area.

5. The method according to claim 4, characterized in that, Based on the breakthrough pressure, pressurization operation indicators, and pressurization operation chart of the cylindrical sample, the evaluation results of the pressurization operation of the gas storage facility in the mudstone caprock of the target area are determined, including: Based on the breakthrough pressure and pressurization operation indicators of the cylindrical sample, the corresponding measurement points of the cylindrical sample are plotted on the pressurization operation chart of the gas storage facility. Based on the measurement points corresponding to cylindrical samples at different locations, which are located in the areas of the gas storage pressurization operation chart, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area are determined.

6. The method according to claim 5, characterized in that, Based on the measurement points corresponding to cylindrical samples at different locations falling within the areas of the gas storage pressurization operation chart, the evaluation results of the gas storage pressurization operation of the mudstone caprock in the target area are determined, including: If the ratio of the number of measuring points in the pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be ready for pressurization operation. If the ratio of the number of measuring points in the non-pressurization operation zone to the total number of measuring points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be a favorable caprock and pressurization operation is not allowed. If the ratio of the number of measurement points located in the non-gas storage caprock area to the total number of measurement points exceeds a preset ratio, then the mudstone caprock in the target area is determined to be located in the non-gas storage caprock area and cannot be pressurized.

7. The method according to claim 5, characterized in that, The method further includes: If the ratio of the number of measurement points in the pressurization operation zone to the total number of measurement points exceeds a preset ratio, then the first measurement point with the smallest pressurization operation index and the second measurement point with the largest pressurization operation index in the pressurization operation zone are determined. Draw a first straight line perpendicular to the horizontal axis through the first measurement point, and draw a second straight line perpendicular to the horizontal axis through the second measurement point; Based on the first intersection point of the first straight line and the relationship line, and the second intersection point of the second straight line and the relationship line, the range of gas storage pressure boosting coefficients for the mudstone caprock in the target area is determined.

8. A device for determining the pressure boosting coefficient of a gas storage facility, characterized in that, The device includes: The coordinate system construction module is used to construct a coordinate system by taking the pressure boosting operation index as the horizontal axis and the breakthrough pressure and the gas storage pressure boosting coefficient as the two endpoints of the horizontal axis, respectively. The relationship line drawing module is used to construct the mathematical relationship between the gas storage pressure boosting coefficient and the pressure boosting operation index, and to draw the relationship line between the gas storage pressure boosting coefficient and the pressure boosting operation index in the coordinate system according to the mathematical relationship. The gas storage pressurization operation chart establishment module is used to determine the pressurization operation zone, non-pressurization operation zone, and non-gas storage caprock zone in the coordinate system based on the breakthrough pressure lower limit line corresponding to the breakthrough pressure lower limit line, the pressurization operation lower limit line corresponding to the pressurization operation lower limit line, and the relationship line, and to establish the gas storage pressurization operation chart, so as to determine the gas storage pressurization coefficient of the mudstone caprock based on the gas storage pressurization operation chart.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and, The memory is connected to the at least one processor for data processing; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the method for determining the operating pressure coefficient of the gas storage facility 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 that are used to cause a processor to execute the method for determining the operating pressure coefficient of a gas storage facility as described in any one of claims 1-7.

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