Method, device and equipment for calculating breakthrough pressure of gas reservoir reconstruction underground helium storage
Patent Information
- Application Number
- CN202510230547.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-08-28
AI Technical Summary
由于氦气分子小、常规金属穿透能力强等特殊的物理性质，直接将盖层对天然气的突破压力用于氦气的评价存在较大偏差
[0048] Through the above technical solution, this invention utilizes existing natural gas breakthrough pressure formulas, establishes a regression function relationship between the contact angle and interfacial tension of helium, and obtains the breakthrough pressure value of helium by combining this relationship with the natural gas breakthrough pressure formula. This invention transforms the natural gas breakthrough pressure result into the helium breakthrough pressure under different reservoir temperatures and pressures, offering advantages of simplicity and accuracy. It fills the gap in caprock sealing evaluation methods for underground helium storage, achieving accurate evaluation of helium breakthrough pressure in caprocks.
Smart Images
Figure CN122654467A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of helium storage technology, specifically to a method for calculating the breakthrough pressure of an underground helium storage facility converted from a gas reservoir, a device for calculating the breakthrough pressure of an underground helium storage facility converted from a gas reservoir, an electronic device, a machine-readable storage medium, and a computer program product. Background Technology
[0002] Helium is a strategically important rare gas related to development. Currently, there is no established testing or calculation method for the sealing performance of helium caprocks; existing methods mainly rely on understanding of caprocks' sealing performance against natural gas. Due to the unique physical properties of helium molecules, such as their small size and strong penetration ability against conventional metals, directly using the caprock's breakthrough pressure against natural gas for helium evaluation results in significant bias.
[0003] Therefore, accurately evaluating the breakthrough pressure of helium in the caprock is a difficult problem that has troubled researchers, and there is an urgent need to develop evaluation methods for helium sealing. Summary of the Invention
[0004] The purpose of this invention is to provide a method, apparatus, and equipment for calculating the breakthrough pressure of helium in the underground helium storage facility converted from a gas reservoir, in order to solve the problem of how to accurately evaluate the breakthrough pressure of helium in the caprock.
[0005] To achieve the above objectives, embodiments of the present invention provide a method for calculating the breakthrough pressure of a gas reservoir converted into an underground helium storage facility, comprising:
[0006] The contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature was obtained, as well as the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature was obtained.
[0007] Based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature, a first regression function is constructed; the first regression function characterizes the relationship between reservoir pressure as the independent variable and contact angle between helium and caprock as the dependent variable at the set reservoir temperature.
[0008] Based on the interfacial tension of water in the helium environment under different reservoir pressures at the set reservoir temperature, a second regression function is constructed; the second regression function characterizes the relationship between the reservoir pressure as the independent variable and the interfacial tension of water in the helium environment as the dependent variable at the set reservoir temperature.
[0009] By combining the first regression function, the second regression function, and the natural gas breakthrough pressure formula, the breakthrough pressure for converting a gas reservoir into an underground helium storage facility is calculated.
[0010] Optionally, the construction of the first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature includes:
[0011] The first set of regression equations was constructed using a linear regression algorithm based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature.
[0012] The model coefficients of the first regression function are obtained by solving the first regression equation system using the least squares method.
[0013] The first regression function is constructed based on the model coefficients of the first regression function.
[0014] Optionally, the construction of the second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature includes:
[0015] A second set of regression equations was constructed using a linear regression algorithm based on the relationship between the interfacial tension of water in a helium environment at different reservoir pressures and at the set reservoir temperature.
[0016] The model coefficients of the second regression function are obtained by solving the second regression equation system using the least squares method.
[0017] The second regression function is constructed based on the model coefficients of the second regression function.
[0018] Optionally, the step of simultaneously establishing the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure for converting a gas reservoir into an underground helium storage facility includes:
[0019] Based on the breakthrough pressure results of the first core of the gas reservoir, the gas reservoir temperature and the corresponding contact angle under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the interfacial tension under the gas reservoir temperature and the corresponding interfacial tension under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the first regression function and the second regression function, the breakthrough pressure of the gas reservoir to be converted into an underground helium storage facility is calculated.
[0020] Among them, the first core breakthrough pressure result of the gas reservoir represents the breakthrough pressure result of any one core in the gas reservoir.
[0021] Optionally, the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is calculated based on the first core breakthrough pressure result of the gas reservoir, the contact angle corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the interfacial tension corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the first regression function, and the second regression function. The calculation is performed using the following formula:
[0022]
[0023] Among them, P HePThis indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function; He This represents the second regression function.
[0024] Optionally, the operating pressure of the underground helium storage facility converted from a gas reservoir is less than or equal to the original gas reservoir pressure of the underground helium storage facility converted from a gas reservoir.
[0025] On the other hand, embodiments of the present invention also provide a breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility, comprising:
[0026] The acquisition module is used to acquire the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and to acquire the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature.
[0027] The first construction module is used to construct a first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature; the first regression function characterizes the relationship between reservoir pressure as the independent variable and contact angle between helium and caprock as the dependent variable at the set reservoir temperature.
[0028] The second construction module is used to construct a second regression function based on the interfacial tension of water in the helium environment under different gas pressures at the set gas reservoir temperature; the second regression function characterizes the relationship between the gas reservoir pressure as the independent variable and the interfacial tension of water in the helium environment as the dependent variable at the set gas reservoir temperature.
[0029] The calculation module is used to combine the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0030] Optionally, the construction of the first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature includes:
[0031] The first set of regression equations was constructed using a linear regression algorithm based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature.
[0032] The model coefficients of the first regression function are obtained by solving the first regression equation system using the least squares method.
[0033] The first regression function is constructed based on the model coefficients of the first regression function.
[0034] Optionally, the construction of the second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature includes:
[0035] A second set of regression equations was constructed using a linear regression algorithm based on the relationship between the interfacial tension of water in a helium environment at different reservoir pressures and at the set reservoir temperature.
[0036] The model coefficients of the second regression function are obtained by solving the second regression equation system using the least squares method.
[0037] The second regression function is constructed based on the model coefficients of the second regression function.
[0038] Optionally, the step of simultaneously establishing the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure for converting a gas reservoir into an underground helium storage facility includes:
[0039] Based on the breakthrough pressure results of the first core of the gas reservoir, the gas reservoir temperature and the corresponding contact angle under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the interfacial tension under the gas reservoir temperature and the corresponding interfacial tension under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the first regression function and the second regression function, the breakthrough pressure of the gas reservoir to be converted into an underground helium storage facility is calculated.
[0040] Among them, the first core breakthrough pressure result of the gas reservoir represents the breakthrough pressure result of any one core in the gas reservoir.
[0041] Optionally, the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is calculated based on the first core breakthrough pressure result of the gas reservoir, the contact angle corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the interfacial tension corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the first regression function, and the second regression function. The calculation is performed using the following formula:
[0042]
[0043] Among them, P HeP This indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function;He This represents the second regression function.
[0044] Optionally, the operating pressure of the underground helium storage facility converted from a gas reservoir is less than or equal to the original gas reservoir pressure of the underground helium storage facility converted from a gas reservoir.
[0045] On the other hand, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-mentioned method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0046] On the other hand, the present invention also provides a machine-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0047] On the other hand, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the above-mentioned method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0048] Through the above technical solution, this invention utilizes existing natural gas breakthrough pressure formulas, establishes a regression function relationship between the contact angle and interfacial tension of helium, and obtains the breakthrough pressure value of helium by combining this relationship with the natural gas breakthrough pressure formula. This invention transforms the natural gas breakthrough pressure result into the helium breakthrough pressure under different reservoir temperatures and pressures, offering advantages of simplicity and accuracy. It fills the gap in caprock sealing evaluation methods for underground helium storage, achieving accurate evaluation of helium breakthrough pressure in caprocks.
[0049] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0050] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0051] Figure 1 This is one of the flowcharts illustrating the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility provided by the present invention.
[0052] Figure 2 This is the second flowchart illustrating the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility provided by the present invention.
[0053] Figure 3 This is a schematic diagram of the breakthrough pressure calculation device for converting gas reservoirs into underground helium storage facilities provided by the present invention.
[0054] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation
[0055] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.
[0056] Method Implementation Examples
[0057] Please refer to Figure 1 This invention provides a method for calculating the breakthrough pressure of a gas reservoir converted into an underground helium storage facility, comprising:
[0058] Step 100: Obtain the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and obtain the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature.
[0059] Electronic equipment acquires the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and the interfacial tension of water in the helium environment at different reservoir pressures at the same set reservoir temperature. Specifically, the contact angle θ between helium and caprock at different reservoir pressures at a set reservoir temperature T can be obtained through indoor experimental testing or literature review. He Furthermore, through indoor experimental testing or literature review, the interfacial tension σ of water in a helium environment under different reservoir pressures at a set reservoir temperature T was obtained. He .
[0060] Step 200: Based on the contact angles between helium and caprock at different reservoir pressures at the set reservoir temperature, construct a first regression function. This first regression function characterizes the relationship between reservoir pressure (independent variable) and contact angle between helium and caprock (dependent variable) at the set reservoir temperature.
[0061] This invention embodiment can establish a contact angle relationship curve between helium and caprock at different reservoir pressures under a set reservoir temperature using a data processing regression calculation method, based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature. Specifically, step 200 involves constructing a first regression function based on the contact angle between helium and caprock at different reservoir pressures under the set reservoir temperature, including:
[0062] Step 210: Using a linear regression algorithm, the first set of regression equations is constructed based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature.
[0063] Step 220: Solve the first set of regression equations using the least squares method to obtain the model coefficients of the first regression function.
[0064] Step 230: Construct the first regression function based on the model coefficients of the first regression function.
[0065] The first regression function can be expressed by the following formula:
[0066] θ He =β0+β1P+∈; formula (1)
[0067] Where, θ He The contact angle between helium gas and the caprock is represented by , P represents the reservoir pressure, and β0, β1, and ∈ represent the model coefficients.
[0068] Substituting the contact angles between helium and caprock at different reservoir pressures under a set reservoir temperature into the first regression function, a first set of regression equations is constructed. The electronic device then solves this first set of regression equations using the least squares method to obtain the model coefficients of the first regression function, i.e., calculating the specific values of the model coefficients β0, β1, and ∈. Substituting these model coefficients into the formula for the first regression function, the constructed first regression function is obtained, thus establishing the contact angle relationship curves between helium and caprock at different reservoir pressures under a set reservoir temperature. These contact angle relationship curves can be expressed in another way: θ He =θ(P).
[0069] Step 300: Based on the interfacial tension of water in the helium environment under different reservoir pressures at the set reservoir temperature, construct a second regression function. The second regression function characterizes the relationship between the reservoir pressure (independent variable) and the interfacial tension of water in the helium environment (dependent variable) at the set reservoir temperature.
[0070] This invention embodiment can establish a relationship curve of the interfacial tension of water in a helium environment at different reservoir pressures under a set reservoir temperature by using a data processing regression calculation method, based on the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature. Specifically, step 300 involves constructing a second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature, including:
[0071] Step 310: Using a linear regression algorithm, a second set of regression equations is constructed based on the relationship between the interfacial tension of water in the helium environment at different reservoir pressures and at the set reservoir temperature.
[0072] Step 320: Solve the second set of regression equations using the least squares method to obtain the model coefficients of the second regression function.
[0073] Step 330: Construct the second regression function based on the model coefficients of the second regression function.
[0074] The second regression function can be expressed by the following formula:
[0075] σ He =β2+β3P+ω; Formula (2)
[0076] Where, σ He The interfacial tension of water in a helium environment is represented by β2, β3, and ω, respectively. P represents the reservoir pressure, and β2, β3, and ω represent the model coefficients.
[0077] Substituting the interfacial tension of water in a helium environment under different reservoir pressures at a set reservoir temperature into the aforementioned second regression function, a system of second regression equations is constructed. The electronic device then solves this system of equations using the least squares method to obtain the model coefficients of the second regression function, specifically the calculated values of model coefficients β2, β3, and ω. Substituting these coefficients into the formula for the second regression function yields the completed second regression function, thus establishing the relationship curve between the interfacial tension of water in a helium environment under different reservoir pressures at a set reservoir temperature. The contact angle relationship curve between helium and caprock at different reservoir pressures at a set reservoir temperature is expressed in another way: σ He =σ(P).
[0078] Step 400: Combine the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure for converting a gas reservoir into an underground helium storage facility.
[0079] The embodiments of the present invention can be based on the previous core breakthrough pressure result P of the gas reservoir. o The breakthrough pressure P of the caprock on helium after the gas reservoir was converted into a helium storage reservoir was obtained under different reservoir pressures P and formation temperatures T. HeP .
[0080] The specific conversion method is as follows: Step 400, simultaneously solving the first regression function, the second regression function, and the natural gas breakthrough pressure formula, to calculate the breakthrough pressure for converting a gas reservoir into an underground helium storage facility, including:
[0081] Based on the breakthrough pressure results of the first core sample of the gas reservoir, the contact angle corresponding to the gas reservoir temperature and pressure at which the breakthrough pressure results of the first core sample are obtained, the interfacial tension corresponding to the gas reservoir temperature and pressure at which the breakthrough pressure results of the first core sample are obtained, the first regression function and the second regression function, the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is calculated; wherein, the breakthrough pressure result of the first core sample of the gas reservoir represents any one of the breakthrough pressure results of the core sample of the gas reservoir.
[0082] The breakthrough pressure for converting a gas reservoir into an underground helium storage facility is calculated using the following formula: based on the breakthrough pressure results of the first core sample from the gas reservoir, the contact angle corresponding to the gas reservoir temperature and pressure at which the breakthrough pressure results of the first core sample were obtained, the interfacial tension corresponding to the gas reservoir temperature and pressure at which the breakthrough pressure results of the first core sample were obtained, the first regression function, and the second regression function.
[0083]
[0084] Among them, P HeP This indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function; He This represents the second regression function.
[0085] For example, in this embodiment of the invention, the breakthrough pressure result of the first core is first obtained, and then the interfacial tension and contact angle of the breakthrough pressure result of the first core are obtained through experimental manuals or literature searches, or through experimental testing, as well as the reservoir temperature and reservoir pressure of the breakthrough pressure result of the first core are obtained. Based on the reservoir temperature and reservoir pressure and the first and second regression functions, the contact angle between helium and the caprock and the interfacial tension of water in the helium environment under the reservoir temperature and reservoir pressure are obtained. Substituting the breakthrough pressure result of the first core, the interfacial tension and contact angle of the breakthrough pressure result of the first core, the contact angle between helium and the caprock and the interfacial tension of water in the helium environment under the reservoir temperature and reservoir pressure into formula (3), the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is obtained.
[0086] This invention incorporates the differences between helium and natural gas into the contact angle and interfacial tension, thus converting the natural gas breakthrough pressure into the helium breakthrough pressure. In determining the breakthrough pressure of the caprock on helium in this embodiment, the invention utilizes existing natural gas breakthrough pressures and establishes a functional relationship between the contact angle and interfacial tension for helium. This relationship is then combined with the natural gas breakthrough pressure equation to obtain the numerical value of the helium breakthrough pressure. The advantage of this invention is that it can successfully convert a single natural gas breakthrough pressure result into helium breakthrough pressures under different temperature and pressure conditions simply by testing or querying interfacial tension and contact angle. This method is simple and accurate, filling a gap in the evaluation method for caprock sealing in underground helium storage.
[0087] Furthermore, this invention is applicable to the evaluation of the caprock sealing performance during the conversion of gas reservoirs into underground helium storage facilities. For safety reasons, the future operating pressure of the helium storage facility will not exceed the original gas reservoir pressure; that is, the operating pressure of the converted underground helium storage facility will be less than or equal to the original gas reservoir pressure. This invention also applies to the evaluation of the caprock's helium sealing performance during small-scale pressurization processes in the conversion of water-bearing underground helium storage facilities, providing detailed and scientific support for the dynamic sealing performance of the caprock for decision-making experts.
[0088] In summary, please refer to Figure 2 This invention first establishes the contact angle relationship curve between helium and the caprock at different reservoir pressures under different reservoir temperatures, and the interfacial tension relationship curve between water and the caprock under helium conditions. Then, it combines the breakthrough pressure formulas for helium and natural gas to obtain the expression for the breakthrough pressure of helium in the underground helium storage facility converted from a gas reservoir under different pressures. Finally, it programs the above calculation method to obtain a method and apparatus for calculating the breakthrough pressure of the underground helium storage facility converted from a gas reservoir under different temperatures and pressures.
[0089] To discuss the feasibility of converting a gas reservoir in the eastern Ordos Basin into an underground helium storage facility, based on the gas reservoir breakthrough pressure test result of 7.62 MPa, the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to the embodiment of the present invention is used to predict that the breakthrough pressure after conversion into a helium storage facility will be 3.55 MPa. This is close to the 3.72 MPa obtained by actual helium experimental testing, which can confirm the accuracy of the embodiment of the present invention.
[0090] Device Examples
[0091] Please refer to Figure 3 On the other hand, embodiments of the present invention also provide a breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility, comprising:
[0092] The acquisition module 301 is used to acquire the contact angle between helium and caprock at different reservoir pressures when the reservoir temperature is set, and to acquire the interfacial tension of water in the helium environment at different reservoir pressures when the reservoir temperature is set.
[0093] The first construction module 302 is used to construct a first regression function based on the contact angle between helium and caprock at different reservoir pressures when the reservoir temperature is set. The first regression function characterizes the relationship between reservoir pressure as the independent variable and contact angle between helium and caprock as the dependent variable when the reservoir temperature is set.
[0094] The second construction module 303 is used to construct a second regression function based on the interfacial tension of water in the helium environment under different gas reservoir pressures at the set gas reservoir temperature; the second regression function characterizes the relationship between the gas reservoir pressure as the independent variable and the interfacial tension of water in the helium environment as the dependent variable at the set gas reservoir temperature.
[0095] The calculation module 304 is used to combine the first regression function, the second regression function and the natural gas breakthrough pressure formula to calculate the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0096] Optionally, the construction of the first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature includes:
[0097] The first set of regression equations was constructed using a linear regression algorithm based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature.
[0098] The model coefficients of the first regression function are obtained by solving the first regression equation system using the least squares method.
[0099] The first regression function is constructed based on the model coefficients of the first regression function.
[0100] Optionally, the construction of the second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature includes:
[0101] A second set of regression equations was constructed using a linear regression algorithm based on the relationship between the interfacial tension of water in a helium environment at different reservoir pressures and at the set reservoir temperature.
[0102] The model coefficients of the second regression function are obtained by solving the second regression equation system using the least squares method.
[0103] The second regression function is constructed based on the model coefficients of the second regression function.
[0104] Optionally, the step of simultaneously establishing the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure for converting a gas reservoir into an underground helium storage facility includes:
[0105] Based on the breakthrough pressure results of the first core of the gas reservoir, the gas reservoir temperature and the corresponding contact angle under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the interfacial tension under the gas reservoir temperature and the corresponding interfacial tension under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the first regression function and the second regression function, the breakthrough pressure of the gas reservoir to be converted into an underground helium storage facility is calculated.
[0106] Among them, the first core breakthrough pressure result of the gas reservoir represents the breakthrough pressure result of any one core in the gas reservoir.
[0107] Optionally, the breakthrough pressure for converting a gas reservoir into an underground helium storage facility is calculated based on the first core breakthrough pressure result of the gas reservoir, the contact angle corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the interfacial tension corresponding to the gas reservoir temperature and pressure at which the first core breakthrough pressure result was obtained, the first regression function, and the second regression function. The calculation is performed using the following formula:
[0108]
[0109] Among them, P HeP This indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function; He This represents the second regression function.
[0110] Optionally, the operating pressure of the underground helium storage facility converted from a gas reservoir is less than or equal to the original gas reservoir pressure of the underground helium storage facility converted from a gas reservoir.
[0111] The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility includes a processor and a memory. The aforementioned acquisition module 301, first construction module 302, second construction module 303, and calculation module 304 are all stored in the memory as program units. The processor executes the aforementioned program units stored in the memory to achieve the corresponding functions.
[0112] A processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured.
[0113] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.
[0114] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call logic instructions in the memory 430 to execute a method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility. This method includes: obtaining the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and obtaining the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature; constructing a first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature; the first regression function characterizes the relationship between the reservoir pressure (independent variable) and the contact angle between helium and caprock at the set reservoir temperature; constructing a second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature; the second regression function characterizes the relationship between the reservoir pressure (independent variable) and the interfacial tension of water in the helium environment at the set reservoir temperature; and combining the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0115] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0116] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a machine-readable storage medium. When the computer program is executed by a processor, the computer can execute a method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility. The method includes: obtaining the contact angle between helium and caprock at different gas pressures at a set gas reservoir temperature, and obtaining the interfacial tension of water in the helium environment at different gas pressures at a set gas reservoir temperature; constructing a first regression function based on the contact angle between helium and caprock at different gas pressures at the set gas reservoir temperature; the first regression function characterizes the relationship between the gas reservoir pressure (independent variable) and the contact angle between helium and caprock (dependent variable) at the set gas reservoir temperature; constructing a second regression function based on the interfacial tension of water in the helium environment at different gas pressures at the set gas reservoir temperature; the second regression function characterizes the relationship between the gas reservoir pressure (independent variable) and the interfacial tension of water in the helium environment (dependent variable) at the set gas reservoir temperature; and calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility by combining the first regression function, the second regression function, and the natural gas breakthrough pressure formula.
[0117] In another aspect, the present invention also provides a machine-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a method for calculating the breakthrough pressure of converting a gas reservoir into an underground helium storage facility. This method includes: obtaining the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and obtaining the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature; constructing a first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature; the first regression function characterizes the relationship between reservoir pressure (independent variable) and contact angle between helium and caprock (dependent variable) at the set reservoir temperature; constructing a second regression function based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature; the second regression function characterizes the relationship between reservoir pressure (independent variable) and interfacial tension of water in the helium environment (dependent variable) at the set reservoir temperature; and simultaneously applying the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
[0118] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0119] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for calculating the breakthrough pressure of a gas reservoir converted into an underground helium storage facility, characterized in that, include: The contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature was obtained, as well as the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature was obtained. Based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature, a first regression function is constructed; the first regression function characterizes the relationship between reservoir pressure as the independent variable and contact angle between helium and caprock as the dependent variable at the set reservoir temperature. Based on the interfacial tension of water in the helium environment under different reservoir pressures at the set reservoir temperature, a second regression function is constructed; the second regression function characterizes the relationship between the reservoir pressure as the independent variable and the interfacial tension of water in the helium environment as the dependent variable at the set reservoir temperature. By combining the first regression function, the second regression function, and the natural gas breakthrough pressure formula, the breakthrough pressure for converting a gas reservoir into an underground helium storage facility is calculated.
2. The breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to claim 1, characterized in that, The first regression function is constructed based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature, including: The first set of regression equations was constructed using a linear regression algorithm based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature. The model coefficients of the first regression function are obtained by solving the first regression equation system using the least squares method. The first regression function is constructed based on the model coefficients of the first regression function.
3. The breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to claim 1, characterized in that, The second regression function is constructed based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature, including: A second set of regression equations was constructed using a linear regression algorithm based on the relationship between the interfacial tension of water in a helium environment under different reservoir pressures at the set reservoir temperature. The model coefficients of the second regression function are obtained by solving the second regression equation system using the least squares method. The second regression function is constructed based on the model coefficients of the second regression function.
4. The breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to claim 1, characterized in that, The calculation of the breakthrough pressure for converting a gas reservoir into an underground helium storage facility by simultaneously applying the first regression function, the second regression function, and the natural gas breakthrough pressure formula includes: Based on the breakthrough pressure results of the first core of the gas reservoir, the gas reservoir temperature and the corresponding contact angle under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the interfacial tension under the gas reservoir temperature and the corresponding interfacial tension under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the first regression function and the second regression function, the breakthrough pressure of the gas reservoir to be converted into an underground helium storage facility is calculated. Among them, the first core breakthrough pressure result of the gas reservoir represents the breakthrough pressure result of any one core in the gas reservoir.
5. The breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to claim 4, characterized in that, Based on the breakthrough pressure results of the first core sample from the gas reservoir, the reservoir temperature and contact angle corresponding to the measured breakthrough pressure, the interfacial tension corresponding to the measured breakthrough pressure, the first regression function, and the second regression function, the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is calculated using the following formula: Among them, P HeP This indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function; He This represents the second regression function.
6. The breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility according to any one of claims 1 to 5, characterized in that, The operating pressure of the underground helium storage facility converted from the gas reservoir is less than or equal to the original gas reservoir pressure.
7. A breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility, characterized in that, include: The acquisition module is used to acquire the contact angle between helium and caprock at different reservoir pressures at a set reservoir temperature, and to acquire the interfacial tension of water in the helium environment at different reservoir pressures at a set reservoir temperature. The first construction module is used to construct a first regression function based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature; the first regression function characterizes the relationship between reservoir pressure as the independent variable and contact angle between helium and caprock as the dependent variable at the set reservoir temperature. The second construction module is used to construct a second regression function based on the interfacial tension of water in the helium environment under different gas pressures at the set gas reservoir temperature; the second regression function characterizes the relationship between the gas reservoir pressure as the independent variable and the interfacial tension of water in the helium environment as the dependent variable at the set gas reservoir temperature. The calculation module is used to combine the first regression function, the second regression function, and the natural gas breakthrough pressure formula to calculate the breakthrough pressure of converting a gas reservoir into an underground helium storage facility.
8. The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility according to claim 7, characterized in that, The first regression function is constructed based on the contact angle between helium and caprock at different reservoir pressures at the set reservoir temperature, including: The first set of regression equations was constructed using a linear regression algorithm based on the relationship between the contact angles of helium gas and caprock under different reservoir pressures at the set reservoir temperature. The model coefficients of the first regression function are obtained by solving the first regression equation system using the least squares method. The first regression function is constructed based on the model coefficients of the first regression function.
9. The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility according to claim 7, characterized in that, The second regression function is constructed based on the interfacial tension of water in the helium environment at different reservoir pressures at the set reservoir temperature, including: A second set of regression equations was constructed using a linear regression algorithm based on the relationship between the interfacial tension of water in a helium environment under different reservoir pressures at the set reservoir temperature. The model coefficients of the second regression function are obtained by solving the second regression equation system using the least squares method. The second regression function is constructed based on the model coefficients of the second regression function.
10. The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility according to claim 7, characterized in that, The calculation of the breakthrough pressure for converting a gas reservoir into an underground helium storage facility by simultaneously applying the first regression function, the second regression function, and the natural gas breakthrough pressure formula includes: Based on the breakthrough pressure results of the first core of the gas reservoir, the gas reservoir temperature and the corresponding contact angle under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the interfacial tension under the gas reservoir temperature and the corresponding interfacial tension under the gas reservoir pressure when the breakthrough pressure results of the first core were obtained, the first regression function and the second regression function, the breakthrough pressure of the gas reservoir to be converted into an underground helium storage facility is calculated. Among them, the first core breakthrough pressure result of the gas reservoir represents the breakthrough pressure result of any one core in the gas reservoir.
11. The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility according to claim 10, characterized in that, Based on the breakthrough pressure results of the first core sample from the gas reservoir, the reservoir temperature and contact angle corresponding to the measured breakthrough pressure, the interfacial tension corresponding to the measured breakthrough pressure, the first regression function, and the second regression function, the breakthrough pressure for converting the gas reservoir into an underground helium storage facility is calculated using the following formula: Among them, P HeP This indicates the breakthrough pressure for converting gas reservoirs into underground helium storage facilities; P o This represents the breakthrough pressure result of the first core sample from the gas reservoir; θ o σ represents the contact angle corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; o This represents the interfacial tension corresponding to the reservoir temperature and pressure at which the breakthrough pressure result of the first core was measured; θ He σ represents the first regression function; He This represents the second regression function.
12. The breakthrough pressure calculation device for converting a gas reservoir into an underground helium storage facility according to any one of claims 7 to 11, characterized in that, The operating pressure of the underground helium storage facility converted from the gas reservoir is less than or equal to the original gas reservoir pressure.
13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility as described in any one of claims 1 to 6.
14. A machine-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility as described in any one of claims 1 to 6.
15. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the breakthrough pressure calculation method for converting a gas reservoir into an underground helium storage facility as described in any one of claims 1 to 6.