A method, system, device and medium for identifying water influx during water gas reservoir well production

Abstract

The application provides a water invasion amount identification method, system, device and medium in the production process of a water and gas reservoir well, comprising the following steps: establishing a corresponding equivalent water invasion model based on the relative position relationship between the water area and the gas area of the reservoir well; establishing a water invasion material balance model according to the stage division of the equivalent water invasion model and the pressure measurement time points in previous years; iteratively calculating the water invasion material balance model based on the principle that the stage water area pressure linearly decreases according to the stage water invasion amount; and evaluating the water body drainage line and guiding the drainage gas production of the reservoir well based on the iteratively calculated water invasion material balance model. The application selects the equivalent water invasion model corresponding to different well production geological models, establishes an iterative algorithm meeting the gas and water flow material balance equation, obtains well historical pressure parameters and reservoir parameters, calculates the current water invasion amount, and is further used for evaluating the water body and guiding the drainage gas production of the gas field well. The application can simplify parameters, avoid the situation that the crack water invasion model in the prior art cannot accurately depict and has difficulty in multi-parameter representation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas field development, and particularly relates to a water invasion amount identification method, system, device and medium in a water-bearing gas reservoir well production process. BACKGROUND

[0002] In the development process of a water-bearing gas reservoir, water invasion leads to water outflow in a production well, affects well production and gas reservoir recovery, and needs to evaluate water bodies to guide gas field drainage gas production, and a key technology is water invasion amount calculation.

[0003] In the prior art, the water invasion amount calculation method of a gas reservoir with relatively uniform physical properties such as sandstone is relatively mature, a water invasion model can be directly established by using a geological model, and the direction of water invasion is relatively determined.

[0004] However, for a fractured gas reservoir such as a carbonate rock, water invasion is greatly affected by fracture pipe flow, and it is impossible to directly establish a water invasion model by using a geological model, and the water invasion process is usually an unstable process. SUMMARY

[0005] In view of the problems in the prior art, the application provides a water invasion amount identification method, system, device and medium in a water-bearing gas reservoir well production process, which can avoid the situation that a fracture water invasion model in the prior art cannot accurately depict and has difficulty in multi-parameter representation.

[0006] The application is achieved by the following technical solutions:

[0007] A water invasion amount identification method in a water-bearing gas reservoir well production process comprises the following steps:

[0008] An equivalent water invasion model is established based on the relative position relationship between a water zone and a gas zone of a reservoir well;

[0009] A water invasion material balance model is established according to the division of stages of the equivalent water invasion model and pressure measurement time points in previous years;

[0010] The water invasion material balance model is iterated based on the principle that the stage water zone pressure linearly decreases according to the stage water invasion amount;

[0011] The water invasion material balance model after iteration is used to evaluate water body drainage lines and guide reservoir well drainage gas production.

[0012] Further, the establishment of the equivalent water invasion model based on the relative position relationship between the water zone and the gas zone of the reservoir well comprises:

[0013] An I-type model, the I-type model is a 1 / 4 sphere, the water zone and the gas zone are sequentially nested in the sphere, and the well is located at the center position of the sphere and connected to the gas zone;

[0014] The II type model is a 1 / 2 sphere, and the water zone and the gas zone are nested in the sphere in sequence, and the well is located at the center of the sphere and communicates with the gas zone.

[0015] The III type model is a sphere, and the water zone and the gas zone are nested in the sphere in sequence, and the well is located at the center of the sphere and communicates with the gas zone.

[0016] Further, the water invasion material balance model is:

[0017] The water invasion amount is the sum of the stage water invasion amounts, and the stage water invasion amount is the integral of the water invasion speed and the stage time.

[0018] Further, the water invasion speed is: the water production index multiplied by the pressure difference between the water zone and the gas zone, and the relationship is Ve=J×(Pw-Pr).

[0019] Wherein, the water production index is: J=[0.5428·K·h·f] / [u·(lnr-0.75)], K is the reservoir permeability of the gas reservoir, h is the effective thickness of the gas reservoir, which is obtained through well logging interpretation or well testing interpretation data, r is the area conversion radius of the gas reservoir producing gas zone, which is obtained by converting the radius of the corresponding equivalent water invasion model through the gas zone evaluation reserves; the parameter Pr is the current formation pore pressure of the gas reservoir, which is obtained through the pressure test of the well in the past years.

[0020] Further, the process of the iterative water invasion material balance model is:

[0021] The stage gas zone pressure Pr is equal to the average of the pressure values of the previous stage and the current stage, then the gas zone pressure (Pr) n of the nth stage is [(Pr) n + (Pr) n-1] / 2.

[0022] The stage water zone pressure decreases linearly according to the stage water invasion amount, and the water zone pressure (Pw) n-1 of the n-1th stage is (Pr) 1 [1 – (We) n-1 / (We) max].

[0023] Further, in the process of the iterative water invasion material balance model:

[0024] The I type model iteration is: the I type equivalent water invasion model (We) max = 0.25·Ct·Wi·P1.

[0025] The II type model iteration is: the II type equivalent water invasion model (We) max = 0.5·Ct·Wi·P1.

[0026] The III type model iteration is: the III type equivalent water invasion model (We) max = Ct·Wi·P1.

[0027] Wherein, Wi is movable water body, which is obtained by multiplying water body size and movable coefficient through geological model, water body size is obtained through geological model by adopting structure extrapolation method and / or geological modeling method, movable coefficient is obtained through lithology experiment, including adopting water injection and water withdrawal weighing method, water injection and water withdrawal nuclear magnetic method and / or capillary pressure curve method, reservoir space elastic compression coefficient Ct is obtained through lithology mechanics experiment, or porosity and pressure empirical formula method.

[0028] Further, the water invasion material balance model after iteration is used to evaluate water body drainage line and guide the process of water drainage gas production of the reservoir well.

[0029] Through the obtained water invasion amount parameter, a plurality of auxiliary parameters can be calculated for evaluating water body and water body drainage line, such as water invasion speed, water drive index and water invasion replacement coefficient.

[0030] A water invasion amount identification system in a water-bearing gas reservoir well production process, comprising:

[0031] An equivalent water invasion model module is used to establish a corresponding equivalent water invasion model based on the relative position relationship between the water zone and the gas zone of the reservoir well.

[0032] A water invasion material balance model module is used to establish a water invasion material balance model according to the equivalent water invasion model and the stage division of the pressure measurement time points in the years.

[0033] An iteration module is used to iterate the water invasion material balance model based on the stage water zone pressure according to the principle that the stage water invasion amount is linearly decreased.

[0034] An application module is used to evaluate the water body drainage line and guide the process of water drainage gas production of the reservoir well based on the water invasion material balance model after iteration.

[0035] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of a water invasion amount identification method in a water-bearing gas reservoir well production process when executing the computer program.

[0036] A computer readable storage medium stores a computer program, and the computer program implements the steps of a water invasion amount identification method in a water-bearing gas reservoir well production process when executed by a processor.

[0037] Compared with the prior art, the present application has the following beneficial technical effects:

[0038] The application provides a water invasion amount identification method, system, device and medium in the production process of a water gas reservoir well, comprising the following steps: establishing a corresponding equivalent water invasion model based on the relative position relationship between the water area and the gas area of the reservoir well; establishing a water invasion material balance model according to the stage division of the equivalent water invasion model and the pressure measurement time points in previous years; iteratively establishing the water invasion material balance model based on the principle that the stage water area pressure linearly decreases according to the stage water invasion amount; and evaluating the water body drainage line and guiding the drainage gas production of the reservoir well based on the iteratively established water invasion material balance model. The application selects the equivalent water invasion model corresponding to different well production geological models, establishes an iterative algorithm that meets the gas-water flow material balance equation, obtains well historical pressure parameters and reservoir parameters, calculates the current water invasion amount, and then is used for evaluating the water body and guiding the drainage gas production of the gas field well. Since the above method uses the equivalent water invasion model, the parameters can be simplified, especially for fractured water gas reservoirs, and the difficulty of accurately depicting and multi-parameter characterization in the existing technology is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A water gas reservoir well production process water invasion amount identification method flowchart is provided in the application.

[0040] Figure 2 A different gas reservoir equivalent water invasion model chart is provided in the application.

[0041] Figure 3 A well and gas-water interface relationship schematic diagram in the equivalent water invasion model chart is provided in the application.

[0042] Figure 4 A type II equivalent water invasion model schematic diagram is provided in the application.

[0043] Figure 5 A type III equivalent water invasion model schematic diagram is provided in the application.

[0044] Figure 6 A type I equivalent water invasion model schematic diagram is provided in the application.

[0045] Figure 7 A curve diagram for displaying the calculation results in the example is provided. DETAILED DESCRIPTION

[0046] The application will be further described in detail below in combination with specific examples, which are an explanation of the application rather than a limitation.

[0047] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0048] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0049] In the development process of a water-bearing gas reservoir, water invasion to the gas-water invasion zone will occur during well production, and the invasion amount needs to be calculated for evaluating the water body and guiding the drainage gas production of the gas field well.

[0050] In the prior art, the water invasion calculation method of a gas reservoir with relatively uniform physical properties such as sandstone is relatively mature, a water invasion model can be directly established by using a geological model, and the direction of water invasion is relatively clear.

[0051] However, for a fractured gas reservoir such as a carbonate rock, water invasion is greatly affected by fracture pipe flow, and it is not possible to directly establish a water invasion model by using a geological model, and the water invasion process is usually an unstable process. Therefore, according to an actual common water-bearing gas reservoir geological model, an equivalent water invasion model chart is established, and an iteration algorithm satisfying a gas-water flow material balance equation is matched to calculate the water invasion amount.

[0052] The present application provides a water invasion amount identification method in the well production process of a water-bearing gas reservoir, as shown in the above Figure 1 The method comprises the following steps:

[0053] An equivalent water invasion model is established based on the relative position relationship between the water zone and the gas zone of the reservoir well;

[0054] A water invasion material balance model is established according to the equivalent water invasion model and the division of stages according to the pressure measurement time points in previous years;

[0055] The water invasion material balance model is iterated based on the principle that the stage water zone pressure linearly decreases according to the stage water invasion amount.

[0056] Based on the iterative water invasion material balance model to evaluate water body can be arranged line and guide the reservoir well drainage gas production.

[0057] Preferably, the corresponding equivalent water invasion model is established based on the relative position relationship between the water zone and the gas zone of the reservoir well, which includes:

[0058] I type model, such as Figure 6 As shown, the I type model is a 1 / 4 sphere, and the water zone and the gas zone are nested in the sphere in turn, and the well is located at the center position of the sphere and is connected to the gas zone, specifically, as shown in Figure 2 and Figure 3 As shown, the water drive gas reservoir in the I type model can be divided into edge water gas reservoir and bottom water gas reservoir from the water body production capacity, wherein the edge water only locally contacts the gas reservoir, and is mostly present in layered gas reservoir, and the bottom water gas reservoir contacts the water body at the whole bottom boundary of the gas reservoir, which is the main form of massive gas reservoir, wherein the ground water gas reservoir includes two cases, respectively H1 is less than H2 and H1 is greater than H2, wherein H1 is the opening thickness of the well, and H2 is the distance from the opening thickness bottom boundary to the gas water interface;

[0059] II type model, such as Figure 4 As shown, the II type model is a 1 / 2 sphere, and the water zone and the gas zone are nested in the sphere in turn, and the well is located at the center position of the sphere and is connected to the gas zone

[0060] III type model, such as Figure 5 As shown, the III type model is a sphere, and the water zone and the gas zone are nested in the sphere in turn, and the well is located at the center position of the sphere and is connected to the gas zone.

[0061] It should be noted that in the initial state, the gas zone and the water zone have an equivalent gas water interface, the pressure of the gas zone at the gas water interface is equal to the pressure of the water zone, and there is no flow. After the well is produced, the pressure of the gas zone begins to drop, the pressure of the water zone is greater than the pressure of the gas zone, the water zone flows to the gas zone, that is, water invasion occurs, and the amount of invasion is the water invasion amount. After the well continues to produce, the pressure of the gas zone continues to drop, and the pressure of the water zone drops due to water invasion, but the pressure of the water zone is still greater than the pressure of the gas zone, the water zone flows to the gas zone, that is, water invasion continues to occur, and the water invasion amount increases to a certain extent. The produced fluid of the well is gas and water.

[0062] Preferably, the water invasion material balance model is:

[0063] The water invasion amount is the sum of the stage water invasion amount, and the stage water invasion amount is the integral of the water invasion speed and the stage time.

[0064] Further, the water invasion speed is: the water production index multiplied by the pressure difference between the water zone and the gas zone, and the relationship is Ve=J×(Pw-Pr).

[0065] Wherein, the water production index is: J = [0.5428·K·h·f] / [u·(lnr-0.75)], wherein, K is the reservoir permeability of the gas reservoir, h is the effective thickness of the gas reservoir, f is the model coefficient, I, II, III type model is 0.25, 0.5, 1, which is obtained by well logging interpretation or well test interpretation data, r is the area conversion radius of the gas reservoir, which is obtained by the gas zone evaluation reserves conversion into the corresponding equivalent water invasion model radius; the parameter Pr is the current formation pore pressure of the gas reservoir, which is obtained by the pressure test of the well in the past years.

[0066] Further, the process of iterative water invasion material balance model is:

[0067] The pressure value of the stage gas zone pressure Pr is equal to the average value of the pressure value of the previous stage and the current stage, then the nth stage gas zone pressure (Pr)n = [(Pr)n + (Pr)n-1] / 2.

[0068] The stage water zone pressure is linearly decreased according to the stage water invasion amount, then the water zone pressure of the n-1 stage is (Pw)n-1 = (Pr)1 [1 - (We)n-1 / (We)max].

[0069] Further, in the process of iterative water invasion material balance model:

[0070] The I type model iteration is: I type equivalent water invasion model (We)max = 0.25·Ct·Wi·P1.

[0071] The II type model iteration is: II type equivalent water invasion model (We)max = 0.5·Ct·Wi·P1.

[0072] The III type model iteration is: III type equivalent water invasion model (We)max = Ct·Wi·P1.

[0073] Wherein, Wi is the movable water body, which is obtained by the product of the water body size and the movable coefficient through the geological model, the water body size is obtained by the geological model, which adopts the structure extrapolation method and / or the geological modeling method, the movable coefficient is obtained by the lithology experiment, including the water injection and water withdrawal weighing method, the water injection and water withdrawal nuclear magnetic method and / or the capillary pressure curve method, the reservoir space elastic compression coefficient Ct is obtained by the lithology mechanics experiment, or the empirical formula method of porosity and pressure.

[0074] Preferably, the process of evaluating water body drainage line and guiding reservoir well drainage gas production based on the iterative water invasion material balance model is:

[0075] Through the obtained water influx parameter, multiple auxiliary parameters can be calculated for evaluating the water body and water body drainability, such as water influx speed, i.e. water influx change value in a unit time period, water drive index, i.e. the ratio of underground water influx volume to produced fluid volume, water influx replacement coefficient, i.e. the ratio of underground net water influx volume to gas reserve volume, etc.

[0076] Embodiment 1:

[0077] First step, select equivalent water influx, such as Figure 2 The embodiment exemplified in the present embodiment is Model II;

[0078] Second step, establish water influx material balance equation, Type II equivalent water influx model (We)max = 0.5·Ct·Wi·P1;

[0079] Third step, collect and arrange parameters and calculate water production index, as shown in Table 1, the calculation parameters are Ct, Wi, Pr (wherein P1 is the initial formation pressure, corresponding to the test pressure in 2014);

[0080] Table 1.

[0081]

[0082] The water production index is calculated by the formula J = [0.5428·K·h·0.5] / [u·(lnr-0.75)].

[0083] Fourth step, iteratively calculate water influx. Pr corresponds to the formation pressure of each test, (Pr)n is [ (Pr)n + (Pr)n-1] / 2, (Pw)n-1 is P1×(1- stage cumulative water influx / (We)max), (We)max) is the calculated value of 42662880 square. n represents the stage, and is valued according to the test time 1, 2, 3, etc. corresponding to 2014, 2015, 2016, etc. as shown in Table 2.

[0084] Table 2.

[0085]

[0086] Fifth step, evaluate water body drainability and guide water drainage gas production. Combined with the production gas volume, water drive index (its value ≤0.1 weak water drive, 0.1-0.3 medium water drive, >0.3 strong water drive) and water influx replacement coefficient (its value ≤0.15 not active, 0.15-0.4 sub-active, >0.4 active) are calculated respectively. In general, under the conditions of medium water drive and sub-active water influx, water drainage is feasible, and the difficulty of water drainage is small, and the selection mode of water drainage technology is multiple. For example Figure 7As shown, the cumulative water invasion amount is calculated as 158288 square meters in 2021, the water drive index is 0.22, the water invasion replacement coefficient is 0.21, which is characterized as medium water drive and sub-active water invasion, and has drainage conditions, and the next step can implement the drainage gas recovery mode development to improve the gas reservoir recovery.

[0087] The application provides a water invasion amount identification system in a water-bearing gas reservoir well production process, comprising:

[0088] An equivalent water invasion model module is used to establish a corresponding equivalent water invasion model based on the relative position relationship between the water zone and the gas zone of the reservoir well;

[0089] A water invasion material balance model module is used to establish a water invasion material balance model according to the equivalent water invasion model and the division of stages according to the pressure measurement time points in different years;

[0090] An iteration module is used to iteratively establish the water invasion material balance model based on the stage water zone pressure according to the principle that the stage water invasion amount is linearly reduced;

[0091] An application module is used to evaluate the water body drainage line and guide the drainage gas recovery of the reservoir well based on the iteratively established water invasion material balance model.

[0092] In another embodiment of the application, a computer device is provided, which comprises a processor and a memory, the memory is used to store a computer program, the computer program comprises program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to realize the corresponding method process or corresponding function. The processor in the embodiment of the application can be used for the operation of a water invasion amount identification method in a water-bearing gas reservoir well production process.

[0093] In still another embodiment of the present application, the present application also provides a storage medium, specifically a computer readable storage medium (Memory), which is a memory device in a computer device, used for storing programs and data. It can be understood that the computer readable storage medium here can include the built-in storage medium in the computer device, and of course can also include the extended storage medium supported by the computer device. The computer readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and the instructions can be one or more computer programs (including program codes). It should be noted that the computer readable storage medium here can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory. One or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the water influx identification method in the water gas reservoir well production process in the above embodiment.

[0094] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) containing computer-usable program code.

[0095] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in one or more flows and / or blocks.

[0096] These computer program instructions can also be stored in a computer readable memory that can direct the computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction apparatus, which implements the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocksFigure 1 the function specified in the one or more blocks.

[0097] These computer program instructions can also be loaded into computer or other programmable data processing devices, so that a series of operation steps are performed on the computer or other programmable data processing devices to generate computer-implemented processes, thus the instructions executed on the computer or other programmable data processing devices provide a process for implementing the flow Figure 1 the flow or flows and / or blocks Figure 1 the steps of the function specified in the one or more blocks.

[0098] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for identifying water intrusion during the production process of a water-bearing gas reservoir well, characterized in that, Includes the following steps: Based on the relative positional relationship between the water zone and the gas zone of the well, an equivalent water intrusion model is established. The equivalent water intrusion model established based on the relative positional relationship between the water and gas zones in the well includes: Type I model, which is a 1 / 4 sphere, with water zone and gas zone nested inside the sphere, and well located at the center of the sphere and connected to the gas zone; The Type II model is a half-sphere, with water and gas zones nested sequentially within it. The well is located at the center of the sphere and is connected to the gas zone. Type III model: The Type III model is a sphere, with the water zone and gas zone nested inside the sphere. The well is located at the center of the sphere and is connected to the gas zone. A water intrusion material balance model was established based on the equivalent water intrusion model and the pressure measurement time points over the years, dividing the process into stages. The mass balance model for water intrusion is as follows: The water intrusion volume is the sum of the water intrusion volumes in each stage, which is the integral of the water intrusion velocity and the stage time in each stage. Based on the principle that the pressure in the stage water zone decreases linearly in the stage water intrusion, an iterative water intrusion material balance model is used. The process of iterating the water intrusion mass balance model is as follows: The pressure value Pr of the gas zone in stage n is equal to the average of the pressure values ​​measured in the previous stage and the current stage. Therefore, the pressure (Pr)n of the gas zone in stage n is (Pr)n = [(Pr)n + (Pr)n-1] / 2. The pressure in the water zone decreases linearly with the water influx in each stage. Therefore, the pressure in the water zone of the (n-1)th stage is (Pw)n-1 = (Pr)1 [1 – (We)n-1 / (We)max]; During the iterative process of the water intrusion mass balance model: The iterative model for type I is: the equivalent water intrusion model for type I (We)max = 0.25·Ct·Wi·P1; The type II model iteration is: Type II equivalent water intrusion model (We)max = 0.5·Ct·Wi·P1; The iterative model for type III is: Type III equivalent water intrusion model (We)max = Ct·Wi·P1; Where Wi is the movable water body, which is obtained by calculating the product of the water body size and the mobility coefficient through a geological model; Ct is the elastic compressibility coefficient of the reservoir space; and P1 is the initial formation pressure. The iterative water intrusion material balance model is used to evaluate the water body's drainage capacity and guide the drainage and gas production of reservoir wells.

2. The method for identifying water intrusion during the production process of a water-bearing gas reservoir well according to claim 1, characterized in that, The water intrusion rate is: water production index multiplied by the pressure difference between the water zone and the gas zone, with the relationship Ve=J×(Pw-Pr); The water production index is: J=[0.5428·K·h·f] / [u·(lnr-0.75)], where K is the gas reservoir permeability, h is the effective thickness of the gas reservoir, obtained from well logging or well test interpretation data, r is the radius of the gas reservoir's usable gas-bearing area, obtained by converting the gas area's reserves into the radius of the corresponding equivalent water intrusion model; the parameter Pr is the current formation pore pressure of the gas reservoir, obtained from pressure tests of wells over the years.

3. The method for identifying water intrusion during the production process of a water-bearing gas reservoir well according to claim 1, characterized in that, Wi is obtained through geological models using methods including tectonic extrapolation and / or geological modeling. Mobility coefficients are obtained through lithological experiments, including methods such as inflow and outflow weighing, inflow and outflow nuclear magnetic resonance, and / or capillary pressure curves. Ct is obtained through lithological mechanics experiments or empirical formulas of porosity and pressure.

4. The method for identifying water intrusion during the production process of a water-bearing gas reservoir well according to claim 1, characterized in that, The process of evaluating the drainage capacity of water bodies and guiding well drainage for gas production based on the iterative water intrusion mass balance model is as follows: By obtaining the water intrusion parameters, several auxiliary parameters are calculated to evaluate the water body and its dischargeability, such as water intrusion velocity, water drive index, and water intrusion replacement coefficient.

5. A water intrusion identification system during the production process of a water-bearing gas reservoir well, characterized in that, A method for identifying water intrusion during the production process of a well with a water-gas reservoir, based on any one of claims 1-4, includes: The equivalent water intrusion model module is used to establish a corresponding equivalent water intrusion model based on the relative positional relationship between the water zone and the gas zone of the well. The water intrusion material balance model module is used to establish a water intrusion material balance model based on the equivalent water intrusion model and the pressure measurement time points over the years, dividing the process into stages. The iterative module is used to iterate the water intrusion material balance model based on the principle that the pressure in the stage water zone decreases linearly according to the stage water intrusion amount. The application module is used to evaluate the drainage capacity of water bodies and guide well drainage and gas production based on the iterative water intrusion material balance model.

6. A computer 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 computer program, it implements the steps of the water intrusion identification method during the production process of a water-bearing gas reservoir well as described in any one of claims 1-4.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the water intrusion identification method during the production process of a water-bearing gas reservoir well as described in any one of claims 1-4.

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