Salt cavity sediment friction determination method and system, electronic equipment and storage medium

Abstract

The invention discloses a salt cavern sediment friction determining method and system, electronic equipment and a storage medium, and relates to the technical field of salt cavern energy storage, the method comprises the following steps: when gas injection flow and brine discharge flow are stable, obtaining first pressure of a gas injection well mouth of a salt cavern of a target communication well, first pressure of a brine discharge well mouth and brine flow velocity in a brine discharge pipe, calculating the on-way energy loss of the brine in the brine discharging pipe; when gas injection and brine discharge are stopped, the second pressure of the wellhead of the gas injection well and the second pressure of the wellhead of the brine discharge well of the target communication well salt cavity are obtained; according to the first pressure and the second pressure of the well mouth of the gas injection well and the first pressure and the second pressure of the well mouth of the brine discharging well, the flowing speed and the density of the brine in the brine discharging pipe and the on-way energy loss of the brine in the brine discharging pipe are combined, and the sediment friction resistance in the salt cavity of the target communicating well is calculated. For high-impurity salt mines or low-impurity salt mines, the sediment friction resistance can be calculated by adopting the method only by meeting the condition of one-injection and one-discharge communicated wells.

Description

Background Art

[0002] Salt cavern gas storages are all built in lacustrine layered salt rocks, which have the characteristics of small salt rock thickness, many interlayers, and high insoluble impurity content. The cavity formed after water-soluble cavitation is buried by a large amount of insoluble sediment, resulting in a reduction in the effective volume of the gas storage. For example, the cavity formed by high-impurity salt mines in a certain area was completely buried by sediment, resulting in a loss of effective volume.

[0003] Using the gaps in the sediment to store gas can solve the problems of small effective gas storage volume and poor construction economy in high-impurity salt mines, and significantly increase the effective storage capacity of salt cavern gas storage. However, the brine in the gaps in the sediment needs to be discharged, and the brine will consume part of its kinetic energy when passing through the sediment, which is called friction.

[0004] In the process of converting the cavity into a gas storage, the traditional gas injection and brine removal technology does not need to remove brine in the sediment, and uses the pipe annulus to remove the brine on the top of the sediment. However, the sediment gap gas storage requires the use of low-level brine removal to remove the brine in the sediment gap. The friction resistance of the sediment body is the key to the success of gas injection and brine removal. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the prior art and specifically provide a method, system, electronic device and storage medium for determining the friction resistance of salt cavity sediment, as follows:

[0006] 1) In the first aspect, the present invention provides a method for determining the friction resistance of salt cavity sediment, and the specific technical scheme is as follows:

[0007] When the gas injection flow rate and the brine discharge flow rate are stable, the first pressure at the wellhead of the gas injection well in the target connected well salt cavity, the first pressure at the wellhead of the brine discharge well and the brine flow rate in the brine discharge pipe are obtained, and the energy loss of the brine along the brine discharge pipe is calculated; when the gas injection and brine discharge are stopped, the second pressure at the wellhead of the gas injection well in the target connected well salt cavity and the second pressure at the wellhead of the brine discharge well are obtained;

[0008] According to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well, and combined with the brine flow rate and density in the brine drainage pipe and the energy loss of the brine along the brine drainage pipe, the sediment friction resistance in the salt cavity of the target connected well is calculated.

[0009] The beneficial effects of the method for determining the friction resistance of salt cavity sediment provided by the present invention are as follows:

[0010] On the one hand, the sediment friction resistance can be calculated without additional numerical values, and all parameters used for calculation can be accurately measured or calculated at the wellhead on the ground, and there are no parameters that cannot be determined. On the other hand, the operation is simple and the application range is wide. Whether it is a high-impurity salt mine or a low-impurity salt mine, as long as the condition of one injection and one row of connected wells is met, the sediment friction resistance can be calculated.

[0011] On the basis of the above scheme, the method for determining the friction resistance of salt cavity sediment of the present invention can also be improved as follows.

[0012] Furthermore, the energy loss of brine along the brine discharge pipe is calculated, including:

[0013] According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

[0014] Further, the process of obtaining the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well, and the second pressure at the wellhead of the brine drainage well includes:

[0015] By means of a pressure gauge installed at the wellhead of the gas injection well, a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well are measured;

[0016] The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

[0017] Furthermore, it also includes: adjusting the gas injection and brine removal scheme of the target connected well salt cavity according to the calculated sediment friction resistance.

[0018] 2) In the second aspect, the present invention also provides a system for determining the friction resistance of salt cavity sediment, and the specific technical scheme is as follows:

[0019] It includes a data acquisition module and a sediment friction calculation module;

[0020] The data acquisition module is used to: when the gas injection flow rate and the brine discharge flow rate are stable, obtain the first pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine discharge well and the brine flow rate in the brine discharge pipe of the target connected well salt cavity, and calculate the energy loss of the brine along the brine discharge pipe; when the gas injection and brine discharge are stopped, obtain the second pressure at the wellhead of the gas injection well and the second pressure at the wellhead of the brine discharge well of the target connected well salt cavity;

[0021] The sediment friction calculation module is used to calculate the sediment friction in the salt cavity of the target connected well according to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well, and the second pressure at the wellhead of the brine drainage well, combined with the brine flow rate in the brine drainage pipe, the brine density and the energy loss of the brine along the brine drainage pipe.

[0022] On the basis of the above scheme, the system for determining the friction resistance of salt cavity sediment of the present invention can also be improved as follows.

[0023] Furthermore, the data acquisition module is also specifically used for:

[0024] According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

[0025] Furthermore, the data acquisition module is also specifically used for:

[0026] By means of a pressure gauge installed at the wellhead of the gas injection well, a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well are measured;

[0027] The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

[0028] Furthermore, it also includes a gas injection and brine removal scheme adjustment module, which is used to adjust the gas injection and brine removal scheme of the target connected well salt cavity according to the calculated sediment friction resistance.

[0029] 3) In a third aspect, the present invention further provides an electronic device, comprising a processor, the processor being coupled to a memory, the memory storing at least one computer program, the at least one computer program being loaded and executed by the processor, so that the electronic device implements any of the above-mentioned methods for determining the friction resistance of salt cavity sediment.

[0030] 4) In a fourth aspect, the present invention further provides a computer-readable storage medium, in which at least one computer program is stored, and the at least one computer program is loaded and executed by a processor so that the computer implements any of the above-mentioned methods for determining the friction resistance of salt cavity sediment.

[0031] It should be noted that the beneficial effects achieved by the technical solutions of the second to fourth aspects of the present invention and the corresponding possible implementation methods can be found in the above-mentioned technical effects of the first aspect and its corresponding possible implementation methods, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1 This is one of the flow charts of a method for determining friction resistance of salt cavity sediments according to an embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the connected well salt cavity;

[0035] Figure 3 The second flow chart of a method for determining friction resistance of salt cavity sediment according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the fitting curve and the measured curve;

[0037] Figure 5 It is a structural schematic diagram of a system for determining friction resistance of salt cavity sediment according to an embodiment of the present invention;

[0038] Figure 6 The figure is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 As shown, a method for determining friction resistance of salt cavity sediment in an embodiment of the present invention comprises the following steps:

[0041] S1. When the gas injection flow rate and the brine discharge flow rate are stable, obtain the first pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine discharge well, and the brine flow rate in the brine discharge pipe of the target connected well salt cavity, and calculate the energy loss of the brine along the brine discharge pipe; when the gas injection and brine discharge stop, obtain the second pressure at the wellhead of the gas injection well and the second pressure at the wellhead of the brine discharge well of the target connected well salt cavity;

[0042] S2. According to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well, and combined with the brine flow rate in the brine drainage pipe, the brine density and the energy loss of the brine along the brine drainage pipe, the sediment friction resistance in the salt cavity of the target connected well is calculated.

[0043] In S2, the calculation is performed specifically by using the sediment friction calculation formula, and the process of obtaining the sediment friction calculation formula is as follows:

[0044] like Figure 2 As shown, Figure 2 The distribution of brine and sediment in the salt cavity of the connecting well is shown. A large amount of insoluble sediment particles are accumulated at the bottom of the salt cavity of the connecting well. In the process of gas injection and brine removal, gas is injected into the gas injection well and brine is discharged through the brine discharge well.

[0045] When the gas injection and brine drainage are suspended (stopped), the brine velocity in the salt cavity of the connected well (the brine flow rate in the brine drainage pipe) is zero, and the brine and sediment do not consume energy. The gas injection pipeline of the gas injection well and the brine drainage pipeline of the brine drainage well are like two vertical pipes of a "connecting vessel". The gas-liquid interface is stable at a certain depth h1. According to the pressure balance at the depth of the gas-liquid interface, formula (1) is obtained:

[0046] P1+ρ g gh1=P2+ρ b gh1 (1)

[0047] In formula (1), P1 is the pressure at the wellhead of the gas injection well when the gas injection and brine removal are suspended (stopped), and P2 is the pressure at the wellhead of the brine removal well when the gas injection and brine removal are suspended (stopped); ρ g is the density of the gas, ρ b is the density of brine.

[0048] When gas injection and brine removal are carried out smoothly, that is, when the gas injection flow rate and brine removal flow rate are stable, the gas-liquid interface continues to drop, the brine in the salt cavity of the connecting well flows, and the brine and sediment consume energy. The consumed energy includes the sediment friction resistance P s , the energy loss of brine along the brine discharge pipe P m and the kinetic energy of the brine in the brine discharge pipe, of which the energy loss due to the resistance of the sediment is the sediment friction resistance P s The energy loss along the brine in the brine discharge pipe due to the viscosity of the brine, the turbulence of the brine and the friction of the rough inner wall of the pipe is P m , according to the pressure balance at the depth of the gas-liquid interface, formula (2) is obtained:

[0049]

[0050] In formula (2), P1 ′ P2 is the gas pressure at the wellhead of the gas injection well when the gas injection flow rate and brine discharge flow rate are stable. ′ is: the brine pressure at the brine wellhead when the gas injection flow rate and brine discharge flow rate are stable; V1 is the brine flow rate in the brine discharge pipe. h2 represents: the depth of the gas-liquid interface during brine discharge. Formula (1) and formula (2) are sorted to obtain formula (3) and formula (4):

[0051] P1-P2=(ρ b -ρ g )gh1 (3)

[0052]

[0053] Subtract the left and right sides of formula (3) from the left and right sides of formula (4) to obtain formula (5):

[0054]

[0055] When the brine in the salt cavity of the connected well transitions from a static state (the state when gas injection and brine removal are suspended) to a stable gas injection and brine removal state (the state when gas injection and brine removal are carried out steadily), since the cross-sectional area of ​​the salt cavity of the connected well is large, the depth of the gas-liquid interface changes very little in a short time. It can be considered that the depth of the brine at the gas-liquid interface does not change much, that is, h2=h1, and then formula (5) is transformed into formula (6):

[0056]

[0057] Energy loss of brine along the brine discharge pipe P m , which can be calculated by the Darcy-Weisbach formula, that is, formula (7):

[0058]

[0059] In formula (7), d is the inner diameter of the brine discharge pipe, λ is the friction coefficient, g is the gravitational acceleration, and the friction coefficient λ can be calculated using the GERG equation, h = h2 = h1. Combining formula (6) and formula (7), the calculation formula for the sediment friction is obtained, namely formula (8):

[0060]

[0061] Substitute the first pressure at the wellhead of the target connected well salt cavity into P1, and substitute the second pressure at the wellhead of the target connected well salt cavity into P1. ′ , substitute the first pressure of the brine discharge well head of the target connected well salt cavity into P2, substitute the second pressure of the brine discharge well head of the target connected well salt cavity into P2 ′ , substitute the brine flow rate in the brine discharge pipe of the target well-connected salt cavity into V1, and substitute the brine density of the target well-connected salt cavity into ρ b , substitute the energy loss of the brine in the brine discharge pipe along the target well salt cavity into P m , substitute the depth of the gas-liquid interface of the target connected well salt cavity into h, substitute the inner diameter of the brine discharge pipe of the target connected well salt cavity into d, and calculate the sediment friction resistance in the target connected well salt cavity.

[0062] A method for determining the friction resistance of salt cavity sediment in an embodiment of the present invention, on the one hand, can calculate the friction resistance of sediment without additional numerical values, and all parameters used for calculation can be accurately measured or calculated at the wellhead on the ground, and there are no parameters that cannot be determined. On the other hand, the operation is simple and the application range is wide. Whether it is a high-impurity salt mine or a low-impurity salt mine, the calculation of the friction resistance of sediment can be performed as long as the condition of one injection and one row of connected wells is met.

[0063] Optionally, in S1, calculating the energy loss of brine along the brine discharge pipe includes:

[0064] S10. According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of the brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

[0065] Among them, the specification parameters of the brine discharge pipe include: the roughness of the inner wall of the brine discharge pipe and the inner diameter of the brine discharge pipe;

[0066] The GERG equation is:

[0067]

[0068] in, E is the intermediate quantity, k is the roughness of the inner wall of the brine exhaust pipe, in m; d is the inner diameter of the brine exhaust pipe, in m; n is the power index, which is used to describe the drastic degree of transformation of the brine exhaust pipe from a smooth pipe to a rough pipe; f is the resistance factor (equivalent to the transportation efficiency); Re is the Reynolds number.

[0069] Among them, the Darcy-Weisbach formula is: That is formula (7).

[0070] Substitute the roughness of the inner wall of the brine drainage pipe of the target connected well salt cavity into k, substitute the inner diameter of the brine drainage pipe of the target connected well salt cavity into D, substitute the power exponent of the intensity of the transformation of the brine drainage pipe of the target connected well salt cavity from a smooth pipe to a rough pipe into n, substitute the resistance factor corresponding to the brine drainage pipe of the target connected well salt cavity into f, substitute the Reynolds number corresponding to the brine drainage pipe of the target connected well salt cavity into Re, and calculate the friction coefficient corresponding to the target connected well salt cavity. Then substitute it into the Darcy-Weisbach formula to calculate the energy loss along the brine in the target connected well salt cavity in the brine drainage pipe.

[0071] Optionally, in S1, the process of obtaining the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well, and the second pressure at the wellhead of the brine drainage well includes:

[0072] 1) measuring a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well by means of a pressure gauge installed at the wellhead of the gas injection well;

[0073] 2) The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

[0074] Optionally, a flow meter is installed at the wellhead of the brine drainage well to measure the brine discharge flow Q1 of the brine drainage well, and the formula is: The brine flow rate V1 in the brine discharge pipe is calculated.

[0075] Optionally, in the above technical solution, it also includes:

[0076] S3. Adjust the gas injection and brine removal scheme of the target connected well salt cavity according to the calculated sediment friction.

[0077] like Figure 3 As shown, the present invention is described by the following examples:

[0078] S101. Install pressure gauges and flow meters at the wellheads of gas injection wells and brine drainage wells:

[0079] Select high-precision pressure gauges and high-precision flowmeters to be installed at the wellheads of the gas injection well and the brine drainage well, and record the pressure and flow changes at the two wellheads in real time. After 24 hours of gas injection and brine drainage in the salt cavity of the connected well, the main thing is to wait for the gas injection flow and brine drainage flow to be stable and not fluctuate greatly before starting to record data. If the amplitude changes of the gas flow and brine drainage flow within the preset time period do not exceed the corresponding preset range, the gas injection flow and brine drainage flow are considered to be stable.

[0080] S102. Record the instrument values ​​when the gas injection and brine removal are in a stable state:

[0081] When the gas injection and brine removal are normal, and the gas injection flow rate and brine removal flow rate are stable without large fluctuations, record the gas injection wellhead pressure P1 at this time ′ , brine drainage wellhead pressure P2 ′ , brine discharge flow rate from brine discharge well Q1.

[0082] S103. Record the instrument values ​​in the static state of gas injection and brine removal:

[0083] When S102 is completed, the gas injection flow rate is slowly reduced until the compressor stops working, and the brine discharge flow rate is waited to stop. The wellhead pressure P1 of the gas injection well and the wellhead pressure P2 of the brine discharge well in the static state are recorded.

[0084] S104. The friction coefficient of the brine exhaust pipe is calculated using the GERG equation, and the energy loss along the brine exhaust pipe is calculated using the Darcy-Weisbach formula:

[0085] According to the brine discharge flow rate and the size of the brine discharge pipe column, the GERG equation is used to calculate the friction coefficient λ of the brine discharge pipe. The GERG equation is:

[0086]

[0087] in, E is the intermediate quantity, k is the roughness of the inner wall of the brine exhaust pipe, in m; d is the inner diameter of the brine exhaust pipe, in m; n is the power index, which is used to describe the drastic degree of transformation of the brine exhaust pipe from a smooth pipe to a rough pipe; f is the resistance factor (equivalent to the transportation efficiency); Re is the Reynolds number.

[0088] The energy loss (friction resistance) along the brine exhaust pipe is calculated by the Darcy-Weisbach formula: m : in,

[0089] The outlet kinetic energy P of brine in the brine discharge pipe d , calculated by the following formula:

[0090]

[0091] S105. Calculate the friction resistance of the sediment under the brine discharge flow rate:

[0092] Substitute the parameters obtained from S102 to S104 into formula (8) to calculate the sediment friction resistance P when the brine discharge flow rate is Q1. s1 , calculate the sediment friction resistance at different brine discharge flow rates, obtain multiple one-to-one corresponding brine discharge flow rates and sediment friction resistances, and display the multiple one-to-one corresponding brine discharge flow rates and sediment friction resistances on the curve, Figure 4 The typical relationship curve between the brine discharge flow rate and the sediment friction resistance in a connected well salt cavity is shown. It can be found that with the increase of brine discharge flow rate, the sediment friction resistance gradually increases. The functional relationship between the brine discharge flow rate and the sediment friction resistance is obtained by using quadratic polynomial curve fitting, which is Figure 4 The fitting curve in the figure is used to fit the functional relationship between different brine discharge flow rates and the actual measured sediment friction resistance, namely Figure 4 The measured curve in the figure has a good agreement of 0.97 between the fitting curve and the measured curve, which provides guidance for the selection of gas injection pressure and brine discharge flow rate during gas injection and brine discharge in the salt cavity of the connected well with high impurity sediment.

[0093] A method for determining the friction resistance of salt cavity sediment in an embodiment of the present invention belongs to the field of salt cavern energy storage technology and relates to water-soluble mining of salt mines and void gas storage expansion technology of high-impurity salt mine sediments. On the one hand, the sediment friction resistance can be calculated without additional numerical values, and all parameters used for calculation can be accurately measured or calculated at the wellhead on the ground. There are no parameters that cannot be determined, and the friction resistance of the sediment can be calculated by using the pressure changes of the on-site gas injection well and the brine drainage wellhead. On the other hand, the operation is simple and the application range is wide. Whether it is a high-impurity salt mine or a low-impurity salt mine, the sediment friction resistance can be calculated as long as the conditions of one injection and one drainage connecting well (i.e., the salt cavity of the connecting well) are met.

[0094] In the above embodiments, although the steps are numbered S1, S2, etc., these are only specific embodiments given by the present invention. Those skilled in the art may adjust the execution order of S1, S2, etc. according to actual conditions, which is also within the protection scope of the present invention. It can be understood that in some embodiments, some or all of the above embodiments may be included.

[0095] like Figure 5 As shown, a salt chamber sediment friction determination system 200 according to an embodiment of the present invention includes a data acquisition module 201 and a sediment friction calculation module 202;

[0096] The data acquisition module 201 is used to: when the gas injection flow rate and the brine discharge flow rate are stable, obtain the first pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine discharge well, and the brine flow rate in the brine discharge pipe of the target connected well salt cavity, and calculate the energy loss of the brine along the brine discharge pipe; when the gas injection and brine discharge are stopped, obtain the second pressure at the wellhead of the gas injection well and the second pressure at the wellhead of the brine discharge well of the target connected well salt cavity;

[0097] The sediment friction calculation module 202 is used to calculate the sediment friction in the salt cavity of the target connected well according to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well, and in combination with the brine flow rate in the brine drainage pipe, the brine density and the energy loss of the brine along the brine drainage pipe.

[0098] Optionally, in the above technical solution, the data acquisition module 201 is further specifically used for:

[0099] According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

[0100] Optionally, in the above technical solution, the data acquisition module 201 is further specifically used for:

[0101] By means of a pressure gauge installed at the wellhead of the gas injection well, a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well are measured;

[0102] The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

[0103] Optionally, the above technical solution further includes a gas injection and brine removal scheme adjustment module, which is used to adjust the gas injection and brine removal scheme of the target connected well salt cavity according to the calculated sediment friction resistance.

[0104] It should be noted that the beneficial effects of the salt cavity sediment friction determination system 200 provided in the above embodiment are the same as the beneficial effects of the salt cavity sediment friction determination method described above, which will not be described in detail here. In addition, when the system provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to actual conditions to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be described in detail here.

[0105] like Figure 6 As shown, an electronic device 300 according to an embodiment of the present invention includes a processor 320, the processor 320 is coupled to a memory 310, and the memory 310 stores at least one computer program 330, and the at least one computer program 330 is loaded and executed by the processor 320, so that the electronic device 300 implements any of the above-mentioned methods for determining the friction resistance of salt cavity sediment, specifically:

[0106] The electronic device 300 may have relatively large differences due to different configurations or performances, and may include one or more processors 320 (Central Processing Units, CPU) and one or more memories 310, wherein at least one computer program 330 is stored in the one or more memories 310, and the at least one computer program 330 is loaded and executed by the one or more processors 320, so that the electronic device 300 implements any method for determining the friction resistance of salt cavity sediment provided in the above embodiments. Of course, the electronic device 300 may also have components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output. The electronic device 300 may also include other components for realizing the functions of the device, which will not be described in detail here. The electronic device may specifically be a computer, etc.

[0107] A computer-readable storage medium according to an embodiment of the present invention stores at least one computer program, and the at least one computer program is loaded and executed by a processor so that a computer implements any of the above-mentioned methods for determining friction resistance of salt cavity sediment.

[0108] Optionally, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

[0109] In an exemplary embodiment, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device performs any of the above-mentioned methods for determining friction resistance of salt cavity sediment.

[0110] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects and represent the definition of a specific order or sequence. The order of use of similar objects can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than the order shown or described.

[0111] Those skilled in the art know that the present invention can be implemented as a system, method or computer program product. Therefore, the present invention can be specifically implemented in the following forms, namely: it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" herein. In addition, in some embodiments, the present invention can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code.

[0112] Any combination of one or more computer-readable media can be used. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0113] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for determining friction resistance of salt cavity sediment, characterized in that: include: When the gas injection flow rate and the brine discharge flow rate are stable, the first pressure at the wellhead of the gas injection well in the target connected well salt cavity, the first pressure at the wellhead of the brine discharge well and the brine flow rate in the brine discharge pipe are obtained, and the energy loss of the brine along the brine discharge pipe is calculated; when the gas injection and brine discharge are stopped, the second pressure at the wellhead of the gas injection well in the target connected well salt cavity and the second pressure at the wellhead of the brine discharge well are obtained; According to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well, and combined with the brine flow rate and density in the brine drainage pipe and the energy loss of the brine along the brine drainage pipe, the sediment friction resistance in the salt cavity of the target connected well is calculated.

2. A method for determining friction resistance of salt cavity sediment according to claim 1, characterized in that: Calculate the energy loss of brine along the brine discharge pipe, including: According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

3. The method for determining the friction resistance of salt cavity sediment according to claim 1, characterized in that: The process of obtaining a first pressure at a wellhead of a gas injection well, a second pressure at a wellhead of a gas injection well, a first pressure at a wellhead of a brine drainage well, and a second pressure at a wellhead of a brine drainage well includes: By means of a pressure gauge installed at the wellhead of the gas injection well, a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well are measured; The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

4. A method for determining friction resistance of salt cavity sediment according to any one of claims 1 to 3, characterized in that: Also includes: The gas injection and brine removal scheme of the target connected well salt cavity is adjusted according to the calculated sediment friction resistance.

5. A system for determining friction resistance of salt cavity sediment, characterized in that: It includes a data acquisition module and a sediment friction calculation module; The data acquisition module is used to: when the gas injection flow rate and the brine discharge flow rate are stable, obtain the first pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine discharge well and the brine flow rate in the brine discharge pipe of the target connected well salt cavity, and calculate the energy loss of the brine along the brine discharge pipe; when the gas injection and brine discharge are stopped, obtain the second pressure at the wellhead of the gas injection well and the second pressure at the wellhead of the brine discharge well of the target connected well salt cavity; The sediment friction calculation module is used to calculate the sediment friction in the salt cavity of the target connected well according to the first pressure at the wellhead of the gas injection well, the second pressure at the wellhead of the gas injection well, the first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well, and in combination with the brine flow rate in the brine drainage pipe, the brine density and the energy loss of the brine along the brine drainage pipe.

6. A system for determining friction of salt chamber sediment according to claim 5, characterized in that: The data acquisition module is also specifically used for: According to the brine flow rate in the brine discharge pipe and the specification parameters of the brine discharge pipe, the energy loss of brine along the brine discharge pipe is calculated using the GERG equation and the Darcy-Weisbach formula.

7. A system for determining friction resistance of salt chamber sediment according to claim 5, characterized in that: The data acquisition module is also specifically used for: By means of a pressure gauge installed at the wellhead of the gas injection well, a first pressure at the wellhead of the gas injection well and a second pressure at the wellhead of the gas injection well are measured; The first pressure at the wellhead of the brine drainage well and the second pressure at the wellhead of the brine drainage well are measured by a pressure gauge installed at the wellhead of the brine drainage well.

8. A system for determining friction resistance of salt chamber sediment according to any one of claims 5 to 7, characterized in that: It also includes a gas injection and brine removal scheme adjustment module, which is used to adjust the gas injection and brine removal scheme of the target connected well salt cavity according to the calculated sediment friction resistance.

9. An electronic device, characterized in that: The electronic device includes a processor, the processor is coupled to a memory, at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor so that the electronic device implements a method for determining the friction resistance of salt cavity sediment as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one computer program, and the at least one computer program is loaded and executed by a processor so that the computer implements a method for determining friction resistance of salt cavity sediment as claimed in any one of claims 1 to 4.

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