CN113268846B - Method, device, terminal and storage medium for determining water control strategy with water-gas reservoir - Google Patents

Method, device, terminal and storage medium for determining water control strategy with water-gas reservoir Download PDF

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CN113268846B
CN113268846B CN202010096948.7A CN202010096948A CN113268846B CN 113268846 B CN113268846 B CN 113268846B CN 202010096948 A CN202010096948 A CN 202010096948A CN 113268846 B CN113268846 B CN 113268846B
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water
value
gas production
determining
parameter
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CN113268846A (en
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李骞
彭先
赵梓寒
张春
戚涛
张飞
王娟
李滔
李玥洋
姜艺
袁山
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Petrochina Co Ltd
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Abstract

The application discloses a method for determining a water control strategy for a water-gas reservoir, and belongs to the field of oil-gas field development. The method comprises the following steps: the method comprises the steps of obtaining a first relation function of water invasion influence parameters and water breakthrough time and a second relation function of the water invasion influence parameters and accumulated gas production, determining a plurality of first parameter value groups of the water invasion influence parameters of the water-gas reservoir, determining a plurality of water breakthrough times and a plurality of accumulated gas production of the water-gas reservoir based on the plurality of first parameter value groups, the first relation function and the second relation function, comparing the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of 0 with the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of not 0, and determining a water control strategy based on a comparison result. The method for determining the water control strategy for the water-gas reservoir is provided, the water control strategy for the water-gas reservoir is determined according to the relation function, the accuracy of determining the water control strategy for the water-gas reservoir is improved, and the influence of water invasion on the recovery ratio of the gas reservoir is reduced.

Description

Method, device, terminal and storage medium for determining water control strategy with water-gas reservoir
Technical Field
The application relates to the technical field of oil and gas field development, in particular to a method, a device, a terminal and a storage medium for determining a water control strategy for a water-gas reservoir.
Background
When a gas reservoir has formation water present in it, the gas reservoir may be referred to as a water-bearing gas reservoir. Water intrusion occurs when exploiting water-gas reservoirs. Due to invasion of formation water, the gas flow capacity is reduced, and the gas reservoir recovery ratio is influenced. Therefore, when water invasion occurs in a water-gas reservoir, how to determine a corresponding water control strategy is a problem worthy of study.
Disclosure of Invention
The embodiment of the application provides a method, a device, a terminal and a storage medium for determining a water-gas reservoir water control strategy, which can determine a reasonable water control strategy, thereby improving the gas reservoir recovery ratio. The technical scheme for determining the method, the device, the terminal and the storage medium for controlling water by using the water-gas reservoir comprises the following steps:
in a first aspect, a method for determining a strategy for controlling water in a water-gas reservoir is provided, the method comprising:
acquiring a first relation function of a water invasion influence parameter and water breakthrough time and a second relation function of the water invasion influence parameter and accumulated gas production, wherein the water invasion influence parameter comprises water displacement;
determining a plurality of first parameter value sets of water invasion influence parameters of a water and gas reservoir, wherein the water drainage values in the first parameter value sets are different, and the first parameter value sets with the water drainage value of 0 are included in the first parameter value sets;
determining a plurality of water breakthrough times and a plurality of cumulative gas production volumes for the water and gas reservoir based on the plurality of first parameter value sets, the first relationship function, and the second relationship function;
and comparing the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of 0 with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of not 0, and determining a water control strategy based on the comparison result.
Optionally, the water invasion influence parameters further include permeability, heterogeneity, water energy and gas production rate, and the water invasion influence parameter values in the first parameter value groups except for the drainage quantity value are the same.
Optionally, the obtaining a first relation function between the water invasion influence parameter and the water breakthrough time, and a second relation function between the water invasion influence parameter and the accumulated gas production includes:
determining a plurality of design value sets of the water invasion influence parameters;
performing numerical simulation processing based on the plurality of design value groups to obtain water breakthrough time and accumulated gas production rate corresponding to the plurality of design value groups;
and performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine the first relation function and the second relation function.
Optionally, the determining a plurality of first parameter value sets of water invasion influence parameters of the water and gas reservoir includes:
acquiring a permeability value, an anisotropy value, a water body energy value and a gas production speed value of the water-gas reservoir;
determining a plurality of designed drainage quantity values of the water and gas reservoir, wherein the plurality of designed drainage quantity values comprise a drainage quantity value with a numerical value of 0;
determining a plurality of first parameter value sets for the water invasion impact parameter of the water-gas reservoir based on the permeability value, the heterogeneity value, the water energy value, the gas production rate value, and the plurality of drainage quantity values.
Optionally, the comparing the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of 0 with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of not 0, and determining a water control strategy based on a comparison result, includes:
and if the difference value between the water breakthrough time corresponding to the first parameter value group with the drainage quantity value not being 0 and the water breakthrough time corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a first threshold value, and the difference value between the corresponding accumulated gas production and the accumulated gas production corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a second threshold value, determining that the water control strategy is drainage, and otherwise, determining that the water control strategy is water control.
Optionally, the first threshold is a first set percentage of the water breakthrough time corresponding to the first parameter value group with the drainage quantity value of 0, and the second threshold is a second set percentage of the accumulated gas production corresponding to the first parameter value group with the drainage quantity value of 0.
Optionally, after determining the water treatment strategy, the method further includes:
and if the determined water control strategy is water drainage, determining a target water drainage quantity value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of first parameter value sets.
Optionally, after determining the water treatment strategy, the method further includes:
if the determined water control strategy is water control, determining a plurality of second parameter value groups of water invasion influence parameters of the water-gas reservoir, wherein the water invasion influence parameters comprise gas production speeds, and the gas production speeds in the plurality of second parameter value groups are different;
determining a plurality of water breakthrough times and a plurality of cumulative gas production volumes for the water-bearing gas reservoir based on the plurality of second parameter value sets, the first relationship function, and the second relationship function;
and determining a target gas production speed value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of second parameter value sets.
In a second aspect, there is provided an apparatus for determining that there is a water-gas reservoir water control strategy, the apparatus comprising:
the acquisition module is used for acquiring a first relation function of a water invasion influence parameter and water breakthrough time and a second relation function of the water invasion influence parameter and accumulated gas production, wherein the water invasion influence parameter comprises water displacement;
the water intrusion detection system comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for determining a plurality of first parameter value sets of water intrusion influence parameters with water reservoirs, the water drainage quantity values in the first parameter value sets are different, and the first parameter value sets comprise first parameter value sets with the water drainage quantity value being 0;
a second determining module, configured to determine a plurality of water breakthrough times and a plurality of accumulated gas production volumes of the water-bearing gas reservoir based on the plurality of first parameter value sets, the first relation function, and the second relation function;
and the comparison module is used for comparing the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of 0 with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of not 0, and determining a water control strategy based on a comparison result.
Optionally, the water invasion influence parameters further include permeability, heterogeneity, water energy and gas production rate, and the water invasion influence parameter values in the first parameter value groups except for the drainage quantity value are the same.
Optionally, the obtaining module is configured to:
determining a plurality of design value sets of the water invasion impact parameters;
carrying out numerical simulation treatment on the basis of the plurality of design value groups to obtain water breakthrough time and accumulated gas production corresponding to the plurality of design value groups;
and performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine the first relation function and the second relation function.
Optionally, the first determining module is configured to:
acquiring a permeability value, an anisotropy value, a water body energy value and a gas production speed value of the water-gas reservoir;
determining a plurality of designed drainage quantity values of the water and gas reservoir, wherein the plurality of designed drainage quantity values comprise a drainage quantity value with a numerical value of 0;
determining a plurality of first parameter value sets of water invasion impact parameters of the water-gas reservoir based on the permeability value, the heterogeneity value, the water energy value, the gas production rate value, and the plurality of drainage quantity values.
Optionally, the comparison module is configured to:
and if the difference value between the water breakthrough time corresponding to the first parameter value set with the water discharge value not being 0 and the water breakthrough time corresponding to the first parameter value set with the water discharge value being 0 is larger than a first threshold value, and the difference value between the corresponding accumulated gas production and the accumulated gas production corresponding to the first parameter value set with the water discharge value being 0 is larger than a second threshold value, determining that the water control strategy is water discharge, and otherwise, determining that the water control strategy is water control.
Optionally, the first threshold is a first set percentage of the water breakthrough time corresponding to the first parameter value group with the drainage quantity value of 0, and the second threshold is a second set percentage of the accumulated gas production corresponding to the first parameter value group with the drainage quantity value of 0.
Optionally, the apparatus further comprises a target drainage quantity value determining module, configured to:
and if the determined water control strategy is water drainage, determining a target water drainage quantity value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of first parameter value sets.
Optionally, the apparatus further includes a target gas production speed value determination module, configured to:
if the determined water control strategy is water control, determining a plurality of second parameter value groups of water invasion influence parameters of the water-gas reservoir, wherein the water invasion influence parameters comprise gas production speeds, and the gas production speeds in the plurality of second parameter value groups are different;
determining a plurality of water breakthrough times and a plurality of cumulative gas production volumes for the water and gas reservoir based on the plurality of second parameter value sets, the first relationship function, and the second relationship function;
and determining a target gas production speed value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of second parameter value sets.
In a third aspect, a terminal is provided, which includes a processor and a memory, where the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the operations performed by the method for determining that there is a water-gas reservoir water control measure.
In a fourth aspect, a computer-readable storage medium is provided, wherein the storage medium has at least one instruction stored therein, and the at least one instruction is loaded and executed by a processor to implement the operations performed by the method for determining a water and gas reservoir water countermeasure.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the method comprises the steps of determining a plurality of first parameter value groups of water invasion influence parameters of a water and gas reservoir by obtaining a first relation function of the water invasion influence parameters and water breakthrough time and a second relation function of the water invasion influence parameters and accumulated gas production, wherein the water discharge values in the first parameter value groups are different, the first parameter value groups comprise a first parameter value group with a water discharge value of 0, determining the water breakthrough time and the accumulated gas production of the water and gas reservoir based on the first parameter value groups, the first relation function and the second relation function, comparing the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of 0 with the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of not 0, and determining a water control strategy based on the comparison result. The method for determining the water control strategy for the water-gas reservoir is provided, the water control strategy for the water-gas reservoir is determined according to the relation function, the accuracy of determining the water control strategy for the water-gas reservoir is improved, and the influence of water invasion on the recovery ratio of the gas reservoir is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart of a method for determining a strategy for controlling water by a water-gas reservoir according to an embodiment of the present application;
FIG. 2 is a flowchart of a method for determining a strategy for controlling water by a water-gas reservoir according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an apparatus for determining a water control strategy for a water vapor reservoir according to an embodiment of the present application;
FIG. 4 is a residual probability plot of a first relationship function provided by an embodiment of the present application;
fig. 5 is a graph illustrating a relationship between a residual error and a predicted value of a first relationship function according to an embodiment of the present disclosure;
fig. 6 is a relationship diagram of a predicted value and an actual value of a first relationship function provided in an embodiment of the present application;
FIG. 7 is a residual probability plot of a second relationship function provided by an embodiment of the present application;
fig. 8 is a relationship diagram between a residual and a predicted value of a second relationship function provided in an embodiment of the present application;
fig. 9 is a diagram illustrating a relationship between a predicted value and an actual value of a second relationship function according to an embodiment of the present application;
FIG. 10 is a schematic diagram of the relationship between water breakthrough time and water displacement and heterogeneity provided by the embodiments of the present application;
FIG. 11 is a schematic diagram of the relationship between the gas production capacity and the displacement and heterogeneity according to an embodiment of the present disclosure;
FIG. 12 is a schematic diagram of the relationship between water breakthrough time, gas production rate, and heterogeneity according to an embodiment of the present application;
fig. 13 is a schematic diagram of a relationship between water breakthrough time, gas production rate, and water discharge provided in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The method for determining the water control strategy of the water-gas reservoir can be applied to the technical field of oil-gas field development, and is particularly used for determining the water control strategy of the water-gas reservoir. First, a technician may extend a logging tool into a well having a water and gas reservoir to acquire logging data of the water and gas reservoir. Then, a technician can input the logging data into the terminal for storage, the terminal can obtain the logging data, and the method for determining the water control strategy for the water-gas reservoir provided by the embodiment of the application is adopted to predict the water control strategy for the water-gas reservoir. Finally, the technician can guide the exploitation of the water-bearing gas reservoir according to the water control strategy.
Fig. 1 is a flowchart of a method for determining a water control strategy for a water-gas reservoir according to an embodiment of the present application.
Referring to fig. 1, the embodiment includes:
in step 101, a first relation function of a water invasion influence parameter and water breakthrough time and a second relation function of the water invasion influence parameter and accumulated gas production are obtained, wherein the water invasion influence parameter comprises water displacement.
In step 102, a plurality of first parameter value sets of water invasion influence parameters of the water and gas reservoir are determined, wherein the water drainage values in the first parameter value sets are different, and the first parameter value set with the water drainage value of 0 is included in the first parameter value sets.
In step 103, a plurality of water breakthrough times and a plurality of accumulated gas production rates of the water-gas reservoir are determined based on the plurality of first parameter value sets, the first relation function and the second relation function.
In step 104, the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of 0 are compared with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of not 0, and a water control measure is determined based on the comparison result.
The method comprises the steps of determining a plurality of first parameter value groups of water invasion influence parameters of a water and gas reservoir by obtaining a first relation function of the water invasion influence parameters and water breakthrough time and a second relation function of the water invasion influence parameters and accumulated gas production, wherein the water discharge values in the first parameter value groups are different, the first parameter value groups comprise a first parameter value group with a water discharge value of 0, determining the water breakthrough time and the accumulated gas production of the water and gas reservoir based on the first parameter value groups, the first relation function and the second relation function, comparing the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of 0 with the water breakthrough time and the accumulated gas production corresponding to the first parameter value group with the water discharge value of not 0, and determining a water control strategy based on the comparison result. The method for determining the water control strategy for the water-gas reservoir is provided, the water control strategy for the water-gas reservoir is determined according to the relation function, the accuracy of determining the water control strategy for the water-gas reservoir is improved, and the influence of water invasion on the recovery ratio of the gas reservoir is reduced.
Fig. 2 is a flowchart of a method for determining a water control strategy for a water-gas reservoir according to an embodiment of the present application. This embodiment may be performed by a terminal, see fig. 2, and includes:
in step 201, water invasion influencing parameters of a water-gas reservoir are obtained.
The water invasion influence parameters refer to influence parameters of water invasion of a water reservoir, and in the embodiment of the application, the water invasion influence parameters can comprise permeability, heterogeneity, water body energy, water displacement and gas production speed.
In practice, in order to comprehensively determine a reasonable water control strategy for a water-gas reservoir, influence factors of water invasion of the water-gas reservoir need to be comprehensively analyzed. After the terminal obtains the geological influence parameters and the development influence parameters of the water-gas reservoir, the target geological influence parameters with larger influence importance can be selected from the geological influence parameters of the water-gas reservoir, and the target geological influence parameters and the development influence parameters of the water-gas reservoir are used as water invasion influence parameters of the water-gas reservoir. The geological influence parameters refer to geological parameters influencing water invasion in a water-gas reservoir. The development influence parameters refer to development parameters influencing water invasion when a water and gas reservoir is exploited, such as water displacement and gas production speed.
Optionally, the process of determining the target geological influence parameter by the terminal may include: firstly, the terminal can carry out two-level factorial test treatment in geological influence parameters of a water-gas reservoir, specifically, one or more test points are arranged in a preferred area of the geological influence parameters, then numerical simulation treatment is carried out to obtain test results, and the influence importance of each geological influence parameter is determined through comparison and analysis of the test results. And then, selecting the geological influence parameters with larger influence importance from the geological influence parameters as target geological influence parameters. The two-level factorial test processing refers to a processing procedure of grouping each level of two or more factors in a crossed manner and performing test design.
Alternatively, the geologically-influenced parameters for a water-gas reservoir may include anisotropy, permeability, water body energy, water saturation, bottom hole pressure, and total gas injection. In the process of determining the target geological influence parameter, the terminal needs to consider the value range of the geological influence parameter, as shown in table 1, the permeability level difference is used for representing the heterogeneity, the value range of the permeability level difference is [1,100], and the lower the permeability level difference is, the lower the heterogeneity is. The permeability was found to be in the range of [0.1,50]. The water body multiple is used for representing the water body energy, the value range of the water body multiple is [1,5], and the larger the water body multiple is, the stronger the water body energy is. The water saturation refers to the ratio of the pore volume of water in the water-gas reservoir to the pore volume of rock, and the value range of the water saturation is [30,54]. The bottom hole pressure is the pressure measured at the bottom of the well during production, and the value range of the bottom hole pressure is [10,15]. The total gas injection amount is the gas volume injected with the water gas reservoir, and the value range of the total gas injection amount is [50,200].
TABLE 1
Geological influencing parameter Low level High level
Difference in permeability grade 1 100
Permeability (mD) 0.1 50
Multiple of water body 1 5
Water saturation (%) 30 54
Bottom hole pressure (MPa) 10 15
Total amount of insufflation (10) 4 m 3 ) 50 200
In the embodiment of the present application, after the above operations are performed, the order of the geological influence parameters with greater influence importance is: permeability, heterogeneity, water body energy, that is, the target geological impact parameters include permeability, heterogeneity, and water body energy. The development influencing parameters of the water-gas reservoir can be water displacement and gas production speed, so that the water invasion influencing parameters of the water-gas reservoir comprise permeability, heterogeneity, water body energy, water displacement and gas production speed. It should be noted that the permeability refers to the ability of the rock in the water reservoir to conduct fluid, and may directly affect the water invasion speed of the formation, and the higher the permeability of the reservoir, the faster the water invasion speed. The heterogeneity refers to the extremely nonuniform change of the spatial distribution of a water-gas reservoir and various internal attributes, and is used for representing the development degree of reservoir fractures. The water body energy is related to the size of the water body, the stronger the water body energy is, the larger the water amount invading into the water-gas reservoir is, and conversely, the invasion of the water body with the water-gas reservoir is limited. The gas production speed refers to the speed of gas production from a water-gas reservoir, the gas production speed can directly influence the water invasion speed, the higher the gas production speed is, the faster the pressure in the water-gas reservoir is reduced, the water invasion is more likely to occur, and otherwise, the water invasion speed can be delayed. The water discharge rate refers to the volume of discharged water, the invasion of formation water can be delayed by discharging water on the water invasion channel, and different water discharge strengths have different effects.
In step 202, a first relation function of the water invasion influence parameter and the water breakthrough time and a second relation function of the water invasion influence parameter and the accumulated gas production are determined based on the plurality of design value sets.
The design value group refers to a combination of different design values of the water invasion influence parameters, and in the embodiment of the application, a plurality of design value groups can be understood as a plurality of development schemes under different geology and development conditions. The water breakthrough time is the time when formation water in a water-bearing gas reservoir invades a gas well and the gas well begins to breakthrough water. The accumulated gas production rate is the accumulated gas production rate of the water-gas reservoir from the beginning of gas production to the current moment.
In implementation, after the terminal acquires the water invasion influence parameters, a first relation function of the water invasion influence parameters and the water breakthrough time and a second relation function of the water invasion influence parameters and the accumulated gas production can be established by using a response surface method. The response surface method is a statistical test method for optimizing a random process, aims to find a model of the relation between response dependent variables and significant factors in a test, and can comprise three processes of test design, model fitting and optimization process.
Specifically, the process of the terminal determining the first relation function and the second relation function may include: firstly, combining according to different design values of the water invasion influence parameters to obtain a plurality of design value groups of the water invasion influence parameters. And then, carrying out numerical simulation processing based on the plurality of design value groups to obtain the water breakthrough time and accumulated gas production corresponding to the plurality of design value groups. And finally, performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine a first relation function and a second relation function. The analysis of variance processing is a processing method for determining the relationship between the response dependent variable and the significant factor in data statistical analysis.
Optionally, the process of determining the plurality of design value sets by the terminal may include: the terminal can design and obtain a plurality of initial design value groups according to water invasion influence parameters of the water-gas reservoir by using a D-optimal design method (D-optimal test design), and a plurality of design value groups which enable the determinant of the information matrix to be extremely large are selected from the plurality of initial design value groups.
In one embodiment, different design values of the water invasion influence parameter represent different geology and different development conditions, and a plurality of design value groups are a plurality of development schemes. The terminal can obtain various development schemes by using a D-optimal design method, as shown in a table 2, wherein the table 2 comprises 31 development schemes, the 31 development schemes are subjected to numerical simulation treatment, and the water breakthrough time and the accumulated gas production rate of the water-gas reservoir under different geology and development conditions can be obtained, as shown in the table 2,
carrying out variance analysis processing by taking the water cut time as a response dependent variable and the water cut influence parameter as a significant factor, establishing a model of the relation between the water cut influence parameter and the water cut time, and obtaining a first relation function of the water cut influence parameter and the water cut time as follows:
T＝+269.03050-1.61787×K mn +0.210523×K-39.15756×N-3.97249×P+0.075937×P d -0.004532×K mn ×K+0.136556×K mn ×N+0.011819×K mn ×P+0.000852×K mn ×P d -0.061430×K×N-0.010879×K×P-0.005271×K×P d -0.013017×N×P-0.002571×N×P d +0.000959×P×P d +0.001881×K mn 2 +0.030312K 2 +5.63711N 2 +0.019151P 2 -0.000083P d 2 wherein T is water breakthrough time in months, K mn Is heterogeneous, K is permeability, in mD, N is water energy, P is gas production rate, in 10 4 m 3 /d，P d Is the displacement in m 3 /d。
TABLE 2
Scheme(s) Heterogeneity Permeability rate of Energy of water body Gas production rate Discharge of water Time of water breakthrough Gas production capacity
1 40.60 26.30 5.00 60.10 500.00 16 43.04
2 100.00 0.10 5.00 30.00 405.00 120 20.45
3 56.81 24.30 3.31 100.00 235.00 7 48.67
4 1.00 17.81 1.36 84.95 0.00 29 47.53
5 100.00 0.10 0.50 100.00 0.00 20 26.19
6 56.81 24.30 3.31 100.00 235.00 7 48.67
7 1.00 50.00 5.00 100.00 0.00 11 48.69
8 100.00 19.31 3.52 57.72 169.08 15 41.86
9 82.67 50.00 2.37 83.90 0.00 12 48.04
10 82.67 50.00 2.37 83.90 0.00 12 48.04
11 100.00 11.33 1.94 84.60 500.00 50 39.18
12 73.27 4.34 2.12 30.00 0.00 46 21.92
13 1.00 0.10 4.33 100.00 500.00 47 22.80
14 1.00 46.76 3.02 59.05 300.00 30 43.03
15 70.30 50.00 2.52 30.00 500.00 0 21.92
16 43.00 0.10 0.68 68.15 285.00 84 24.86
17 45.55 37.01 0.50 98.60 191.38 9 50.62
18 1.00 46.76 3.02 59.05 300.00 30 43.03
19 100.00 33.21 0.50 48.20 232.50 35 35.06
20 93.07 40.02 5.00 30.00 42.50 68 21.92
21 100.00 50.00 5.00 100.00 500.00 6 49.63
22 2.98 2.84 5.00 30.00 125.71 120 21.92
23 25.75 50.00 0.50 100.00 500.00 16 50.70
24 1.00 15.82 0.50 30.00 500.00 156 21.92
25 43.00 0.10 0.68 68.15 285.00 84 24.86
And (3) carrying out variance analysis processing by using the accumulated gas production as a response dependent variable and using the water invasion influence parameter as a significant factor, establishing a model of the relation between the water invasion influence parameter and the accumulated gas production, and obtaining a second relation function of the water invasion influence parameter and the accumulated gas production as follows:
P t ＝-2.23286E+08-8.11828E+05×K mn +6.49062E+07×K+4.64525E+08×N+7.271
20E+07×P-2.03500E+06×P d -96886.87880×K mn ×K-5.86392E+05×K mn ×N+39509.66187×K mn ×P+8758.05646×K mn ×P d -1.72854E+06×K×N+7.20560E+05×K×P+7899.90923×K×P d -1.43162E+06×N×P+2.44469E+05×N×P d +818.76667×P×P d -14455.43823×K mn 2 -1.51306E+06×K 2 -6.30082E+07×N 2 -4.76227E+05×P 2 +1099.80347×P d 2 wherein P is t For the accumulated gas production, the unit is 10 8 m 3 ，K mn Is heterogeneity, K is permeability, and has unit of mD, N is water body energy, P is gas production speed, and has unit of 10 4 m 3 /d，P d Is the displacement in m 3 /d。
Optionally, the terminal may verify the accuracy and reliability of the first relation function between the water invasion influence parameter and the water breakthrough time. Specifically, after the terminal obtains the first relation function between the water invasion influence parameter and the water breakthrough time, first, the normality test may be performed by using the water breakthrough time as an index to obtain a residual probability map of the first relation function, as shown in fig. 4, residual values of each point in fig. 4 are substantially distributed on a straight line, which indicates that the first relation function has normality. Then, the terminal may perform variance stability check on the first relation function to obtain a relation graph between the residual of the first relation function and the predicted value, as shown in fig. 5, where the residual value and the predicted value are randomly distributed in fig. 5, which indicates that the variance of the first relation function is stable, and may perform variance analysis on the data. Finally, the terminal can also carry out model fitting degree inspection to obtain a relation graph of the predicted value and the actual value, as shown in fig. 6, the predicted value and the actual value in fig. 6 are almost overlapped and form a 45-degree curve, which shows that the fitting degree of the first relation function and the actual value is good, and the first relation function can be used for predicting the water-meeting time of the water-gas reservoir.
And the terminal can also verify the accuracy and reliability of the second relation function of the water invasion influence parameter and the accumulated gas production. Specifically, after the terminal obtains the second relation function between the water invasion influence parameter and the accumulated gas production rate, firstly, the normality test may be performed by using the accumulated gas production rate as an index to obtain a residual probability map of the second relation function, as shown in fig. 7, residual values of each point in fig. 7 are substantially distributed on a straight line, which indicates that the second relation function has normality. Then, the terminal may perform variance stability check on the second relation function to obtain a relation graph between the residual of the second relation function and the predicted value, as shown in fig. 8, where the residual value and the predicted value are randomly distributed in fig. 8, which indicates that the variance of the second relation function is stable, and may perform variance analysis on the data. Finally, the terminal can also carry out model fitting degree inspection to obtain a relation graph of the predicted value and the actual value, as shown in fig. 9, the predicted value and the actual value in fig. 9 are almost overlapped and form a 45-degree curve, which shows that the fitting degree of the second relation function and the actual value is good, and the second relation function can be used for predicting the accumulated gas production of the gas reservoir with water.
In the embodiment of the application, multiple development schemes are designed according to multiple water invasion influence parameters with larger influence importance, the design values of the water invasion influence parameters in the multiple development schemes are subjected to numerical simulation processing, the water breakthrough time and the accumulated gas production rate of water-gas reservoirs under different geology and different development conditions are obtained, and therefore a first relation function of the water invasion influence parameters and the water breakthrough time and a second relation function of the water invasion influence parameters and the accumulated gas production rate are accurately obtained, and the first relation function and the second relation function are suitable for different types of water-gas reservoirs.
In step 203, a plurality of first parameter value sets of water invasion influence parameters of the water gas reservoir are determined, wherein the drainage quantity values in the first parameter value sets are different, and the first parameter value set with the drainage quantity value of 0 is included in the first parameter value sets.
Wherein the water invasion influence parameter values in the plurality of first parameter value sets other than the drainage quantity value are all the same. The plurality of first parameter value groups may include a control parameter value group that is a parameter value group that does not process the experimental object and an experimental parameter value group that is a parameter value group that processes the experimental object. In the embodiment of the present application, the test object may be the drainage volume value, the control parameter value group is a parameter value group in which the drainage volume value is not set, i.e., a first parameter value group in which the drainage volume value is 0, the test parameter value group is a parameter value group in which the drainage volume value is set, i.e., a first parameter value group in which the drainage volume value is not 0, such as the drainage volume values are set to 50m, respectively 3 /d、100m 3 /d、200m 3 A first parameter value set of/d.
In implementation, after the terminal acquires the first relation function and the second relation function, when a technician wants to determine a water control strategy for a water-gas reservoir, firstly, a permeability value, an heterogeneity value, a water energy value and a gas production rate value of the water-gas reservoir are acquired. Then, a plurality of designed drainage quantity values of the water and gas reservoir are determined, and a plurality of first parameter value sets of water invasion influence parameters of the water and gas reservoir are determined based on the permeability value, the heterogeneity value, the water energy value, the gas production speed value and the drainage quantity values. Wherein the plurality of designed drainage values include a drainage value with a value of 0.
Alternatively, the plurality of designed displacement values may be different displacement values pre-designed by a technician, such as displacement value of 0m 3 /d、50m 3 /d、100m 3 /d、200m 3 And/d, etc.
In step 204, a plurality of water breakthrough times and a plurality of cumulative gas production rates of the water and gas reservoir are determined based on the plurality of first parameter value sets, the first relation function and the second relation function.
In an implementation, for each first parameter value group, the water breakthrough time corresponding to the first parameter value group is determined based on the designed drainage quantity value, permeability value, heterogeneity value, water energy value, gas production speed value corresponding to the first parameter value group and the first relation function, and for each first parameter value group, the accumulated gas production rate corresponding to the first parameter value group is determined based on the designed drainage quantity value, permeability value, heterogeneity value, water energy value, gas production speed value corresponding to the first parameter value group and the second relation function. Thus, the water breakthrough time and the cumulative gas production for the control parameter value set and the plurality of experimental parameter value sets can be obtained.
For example, when a technician intends to determine a water control strategy for a certain water and gas reservoir, a plurality of drainage values may be designed in advance, for example, the drainage values are 0, 50, 100, 200, etc., the plurality of designed drainage values are input to the terminal, and the terminal may obtain the water breakthrough time and the cumulative gas yield corresponding to the first parameter value set with the drainage value not being 0, that is, the water breakthrough time and the cumulative gas yield under the drainage condition, and the water breakthrough time and the cumulative gas yield corresponding to the first parameter value set with the drainage value being 0, that is, the water breakthrough time and the cumulative gas yield under the non-drainage condition, according to steps 203 to 204.
In step 205, the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set having a drainage value of 0 are compared with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set having a drainage value of not 0, and a water control measure is determined based on the comparison result.
The water control strategy comprises water drainage and water control, wherein the water drainage refers to drainage on a water invasion channel, and the water control refers to reduction of gas production speed of a gas well and delay of water invasion speed.
In the implementation, the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value group with the drainage quantity value of 0 are compared with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value group with the drainage quantity value of not 0, if the difference value between the water breakthrough time corresponding to the first parameter value group with the drainage quantity value of not 0 and the water breakthrough time corresponding to the first parameter value group with the drainage quantity value of 0 is larger than a first threshold value, and the difference value between the accumulated gas production rate corresponding to the first parameter value group with the drainage quantity value of not 0 and the accumulated gas production rate corresponding to the first parameter value group with the drainage quantity value of 0 is larger than a second threshold value, the water control strategy is determined to be drainage, otherwise, the water control strategy is determined to be water control.
Optionally, the first threshold may be a first set percentage of the water breakthrough time corresponding to the first parameter value set with the water discharge value of 0, and the second threshold may be a second set percentage of the accumulated gas production corresponding to the first parameter value set with the water discharge value of 0. The first set percentage and the second set percentage may be the same, for example, the first set percentage and the second set percentage may both be 10%, the first threshold may be 10% of the water breakthrough time corresponding to the drainage quantity value 0, the second threshold may be 10% of the accumulated gas production corresponding to the drainage quantity value 0, in the plurality of first parameter value sets, a difference between the water breakthrough time corresponding to the first parameter value set having the drainage quantity value of not 0 and the water breakthrough time corresponding to the first parameter value set having the drainage quantity value of 0, and a difference between the accumulated gas production corresponding to the first parameter value set having the drainage quantity value of not 0 and the accumulated gas production corresponding to the first parameter value set having the drainage quantity value of 0 are determined, if the difference between the water breakthrough times is greater than 10% of the water breakthrough time corresponding to the drainage quantity value of 0 and the difference between the accumulated gas production is greater than 10% of the accumulated gas production corresponding to the drainage quantity value of 0, the drainage is adopted as the countermeasure, otherwise, the water control is adopted as the countermeasure. That is, if the water breakthrough time and the gas production amount under the drainage condition are increased by 10% respectively as compared with the case of no drainage, drainage is adopted as a countermeasure against water. Otherwise, water control is adopted as a water control strategy. It should be noted that, after the terminal can calculate the difference between the water breakthrough time and the accumulated gas production rate, the terminal compares the two differences to determine a water control strategy. Or the terminal may determine the difference of the water breakthrough time, compare the difference of the water breakthrough time with the first threshold, calculate the difference of the accumulated gas production if the difference of the water breakthrough time is greater than the first threshold, and perform the subsequent operation to determine the water control strategy. The embodiment of the present application does not limit this.
In step 206, if the determined water control strategy is water drainage, a target water drainage quantity value with a water and gas reservoir is determined based on the plurality of water breakthrough times and the plurality of accumulated gas production volumes corresponding to the plurality of first parameter value sets.
In implementation, after the terminal determines that the water control strategy of the water and gas reservoir is water drainage, the terminal can perform optimization by using a continuous curved surface in a response curved surface method to determine a target water drainage quantity value of the water and gas reservoir. The longer the water breakthrough time is, the better the effect of delaying water invasion is, the larger the accumulated gas production rate is, and the better the gas well yield is. Specifically, if the determined water control measure is drainage, after a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of first parameter value sets are obtained, the plurality of water breakthrough times and the plurality of accumulated gas production rates are analyzed, and the target drainage quantity value of the water-gas reservoir can be determined. For example, if there is a first parameter value group having the longest water breakthrough time and the largest accumulated gas production amount among the plurality of first parameter value groups, the drainage effect of the drainage value of the first parameter value group is the best, and the drainage value in the first parameter value group is taken as the target drainage value of the gas reservoir. The technical personnel can set the water discharge of the water and gas reservoir according to the target water discharge amount value on the site with the water and gas reservoir, so that the water and gas reservoir can discharge water according to the target water discharge amount value, and the effects of prolonging the water breakthrough time and improving the accumulated gas production are achieved.
Optionally, if the water control measure is water control, determining a plurality of second parameter value sets of water invasion influence parameters of the water-gas reservoir, determining a plurality of water breakthrough times and a plurality of accumulated gas production rates of the water-gas reservoir based on the plurality of second parameter value sets, the first relation function and the second relation function, analyzing the plurality of water breakthrough times and the plurality of accumulated gas production rates based on the plurality of water breakthrough times and the plurality of accumulated gas production rates corresponding to the plurality of second parameter value sets, and determining a target gas production rate value of the water-gas reservoir. For example, if there is a second parameter value group with the longest water breakthrough time and the largest accumulated gas production rate in the plurality of second parameter value groups, the water control effect of the gas production rate value of the second parameter value group is the best, and the gas production rate value in the second parameter value group is used as the target gas production rate value of the water-gas reservoir. The water invasion influence parameters comprise gas production speeds, the gas production speeds in the second parameter value sets are different, and the water invasion influence parameter values except the gas production speeds in the second parameter value sets are the same.
Specifically, if it is determined that the water control strategy is water control, the process of determining the target production rate value of the gas well may include: technicians can design different gas production speed values in advance, the designed gas production speed values are input into a terminal, and the terminal determines a plurality of second parameter value sets of water invasion influence parameters of the water-gas reservoir based on the permeability value, the heterogeneity value, the water energy value, the water drainage value and the gas production speed values of the water-gas reservoir. For each second parameter value set, determining the water breakthrough time corresponding to the second parameter value set based on the second parameter value set and the first relation function, and determining the accumulated gas production corresponding to the second parameter value set based on the second parameter value set and the second relation function. And after the water breakthrough time and the accumulated gas production rate corresponding to the second parameter value groups are obtained through calculation, analyzing the water breakthrough time and the accumulated gas production rate, and determining a target gas production rate value of the water-gas reservoir. Technicians can set the gas production speed of the water gas reservoir according to the target gas production speed value on the site with the water gas reservoir, so that the water gas reservoir can be produced according to the target gas production speed value, and the effects of delaying water breakthrough time and increasing the accumulated gas production are achieved.
In the embodiment of the application, for water and gas reservoirs with different reservoir heterogeneity and reservoir permeability, the effect of drainage on water invasion inhibition can be predicted, as shown in fig. 10, a schematic diagram of the relation between water breakthrough time and drainage and heterogeneity is predicted, the permeability level difference in fig. 10 is used for representing the heterogeneity of the reservoir, the stronger the heterogeneity of the reservoir is, the more obvious the drainage effect is, that is, for the reservoir with strong heterogeneity, when drainage is adopted for water control, the water breakthrough time is obviously improved. Moreover, a schematic diagram of the relation between the gas production and the water displacement and the heterogeneity is obtained through prediction, as shown in fig. 11, in a reservoir with strong heterogeneity, when water is controlled by water displacement, the gas production is obviously improved. Therefore, the water invasion path can be drained for the highly heterogeneous existing water-gas reservoir, and the water control measure for drainage is not suitable for the highly homogeneous existing water-gas reservoir. The embodiment of the application also predicts the effect of gas production speed change on water invasion inhibition, and predicts the relationship schematic diagram between water breakthrough time and gas production speed and heterogeneity, as shown in fig. 12, reducing gas production speed can greatly delay water breakthrough time, however, for strong heterogeneous water-bearing gas reservoirs, increasing gas production speed will lead to advanced water breakthrough time. Fig. 13 is a schematic diagram showing the relationship between the water breakthrough time, the gas production rate and the water discharge, and as shown in fig. 13, for a strongly heterogeneous water-bearing gas reservoir, the water breakthrough time is greatly delayed by the large discharge water discharge. Therefore, for the water-gas reservoir with strong heterogeneity, it is not suitable to adopt water control as a water control strategy.
It should be noted that, after the first relation function between the water invasion influence parameter and the water breakthrough time and the second relation function between the water invasion influence parameter and the accumulated gas production amount are obtained according to steps 201 to 202, when a technician wants to determine a water control strategy for a water-gas reservoir, the terminal may be operated to directly use the first relation function and the second relation function to perform steps 203 to 206, so as to obtain the water control strategy for the water-gas reservoir. Alternatively, when the water control measure for the water vapor reservoir is determined, the terminal may obtain the water control measure for the water vapor reservoir according to the above steps 201 to 206. The embodiment of the present application does not limit this.
According to the water invasion influence parameters, multiple development schemes are designed and obtained, the design values of the water invasion influence parameters in the multiple development schemes are subjected to numerical simulation processing, the water breakthrough time and the accumulated gas production rate of the water-gas reservoir under different geology and different development conditions are obtained, and therefore a first relation function of the water invasion influence parameters and the water breakthrough time and a second relation function of the water invasion influence parameters and the accumulated gas production rate are accurately obtained, and the first relation function and the second relation function are suitable for different types of water-gas reservoirs. For any type of water-gas reservoir, according to different design values of water displacement, water invasion influence parameters, a first relation function and a second relation function, water breakthrough time and accumulated gas production of the water-gas reservoir under the water discharge condition and the non-water discharge condition can be calculated and obtained, comparison is carried out, corresponding water control strategies can be formulated according to comparison results, the water control strategies of the water-gas reservoir of different types can be determined, the accuracy of determining the water control strategies of the water-gas reservoir is improved, the efficiency of determining the water control strategies is high, the water control effect is good, and the influence of water invasion on the gas reservoir recovery ratio is reduced.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
Based on the same technical concept, an embodiment of the present application further provides an apparatus for determining that there is a water vapor reservoir to control water, where the apparatus may be a terminal in the foregoing embodiment, as shown in fig. 3, and the apparatus includes:
the acquiring module 301 is configured to acquire a first relation function between a water invasion influence parameter and water breakthrough time, and a second relation function between the water invasion influence parameter and accumulated gas production, where the water invasion influence parameter includes water displacement;
a first determining module 302, configured to determine a plurality of first parameter value sets of water invasion influence parameters of a water reservoir, where water drainage values in the first parameter value sets are different, and the first parameter value sets include a first parameter value set whose water drainage value is 0;
a second determining module 303, configured to determine, based on the plurality of first parameter value sets, the first relation function, and the second relation function, a plurality of water breakthrough times and a plurality of accumulated gas production volumes of the water-gas reservoir;
and the comparison module 304 is configured to compare the water breakthrough time and the accumulated gas production amount corresponding to the first parameter value set with the drainage value of 0 with the water breakthrough time and the accumulated gas production amount corresponding to the first parameter value set with the drainage value of not 0, and determine a water control strategy based on a comparison result.
Optionally, the water invasion influence parameters further include permeability, heterogeneity, water energy and gas production rate, and the water invasion influence parameter values in the plurality of first parameter value sets except for the drainage quantity value are all the same.
Optionally, the obtaining module 301 is configured to:
determining a plurality of design value groups of water invasion influence parameters;
carrying out numerical simulation treatment based on the plurality of design value groups to obtain water breakthrough time and accumulated gas production corresponding to the plurality of design value groups;
and performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine a first relation function and a second relation function.
Optionally, the first determining module 302 is configured to:
acquiring a permeability value, an anisotropy value, a water energy value and a gas production speed value of a water reservoir;
determining a plurality of designed drainage quantity values of the water and gas reservoir, wherein the plurality of designed drainage quantity values comprise a drainage quantity value with a numerical value of 0;
a plurality of first parameter value sets of water invasion impact parameters of the water and gas reservoir are determined based on the permeability value, the heterogeneity value, the water physical energy value, the gas production speed value and the plurality of drainage quantity values.
Optionally, the comparison module 304 is configured to:
and if the difference value between the water breakthrough time corresponding to the first parameter value group with the drainage quantity value not being 0 and the water breakthrough time corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a first threshold value, and the difference value between the corresponding accumulated gas production and the accumulated gas production corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a second threshold value, determining that the water control strategy is drainage, and otherwise, determining that the water control strategy is water control.
Optionally, the first threshold is a first set percentage of the water breakthrough time corresponding to the first parameter value group with the drainage quantity value of 0, and the second threshold is a second set percentage of the accumulated gas production corresponding to the first parameter value group with the drainage quantity value of 0.
Optionally, the apparatus further comprises a target drainage quantity value determining module, configured to:
and if the determined water control strategy is water drainage, determining a target water drainage quantity value with the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to a plurality of first parameter value groups.
Optionally, the apparatus further comprises a target gas production rate value determining module, configured to:
if the determined water control strategy is water control, determining a plurality of second parameter value groups of water invasion influence parameters of the water and gas reservoir, wherein the water invasion influence parameters comprise gas production speeds, and the gas production speeds in the plurality of second parameter value groups are different;
determining a plurality of water breakthrough times and a plurality of accumulated gas production volumes of the water-gas reservoir based on the plurality of second parameter value sets, the first relation function and the second relation function;
and determining a target gas production speed value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to a plurality of second parameter value sets.
According to the water invasion influence parameters, multiple development schemes are designed and obtained, the design values of the water invasion influence parameters in the multiple development schemes are subjected to numerical simulation processing, the water breakthrough time and the accumulated gas production rate of the water-gas reservoir under different geology and different development conditions are obtained, and therefore a first relation function of the water invasion influence parameters and the water breakthrough time and a second relation function of the water invasion influence parameters and the accumulated gas production rate are accurately obtained, and the first relation function and the second relation function are suitable for different types of water-gas reservoirs. For any type of water-gas reservoir, according to different design values of water displacement, water invasion influence parameters, a first relation function and a second relation function, water breakthrough time and accumulated gas production of the water-gas reservoir under the water discharge condition and the non-water discharge condition can be calculated and obtained, comparison is carried out, corresponding water control strategies can be formulated according to comparison results, the water control strategies of the water-gas reservoir of different types can be determined, the accuracy of determining the water control strategies of the water-gas reservoir is improved, the efficiency of determining the water control strategies is high, the water control effect is good, and the influence of water invasion on the gas reservoir recovery ratio is reduced.
It should be noted that: in the apparatus for determining a measure for controlling water using a water vapor storage provided in the foregoing embodiment, when a measure for controlling water using a water vapor storage is determined, only the division of the functional modules is illustrated, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the apparatus may be divided into different functional modules, so as to complete all or part of the functions described above. In addition, the apparatus for determining a measure for controlling water by using a water vapor reservoir and the method embodiment for determining a measure for controlling water by using a water vapor reservoir provided in the foregoing embodiments belong to the same concept, and detailed implementation processes thereof are shown in the method embodiment, and are not described herein again.
In an exemplary embodiment, a terminal is provided, and the terminal includes a processor and a memory, where at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the operations performed by the method for determining a water-gas-reservoir water control measure.
In an exemplary embodiment, a computer-readable storage medium, such as a memory, including instructions executable by a processor in a terminal to perform the method for determining that there is a water vapor reserve water strategy of the above embodiments is also provided. For example, the computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (7)

1. A method for determining a water-gas reservoir water-control strategy, the method comprising:
the method comprises the following steps of obtaining a first relation function of a water invasion influence parameter and water breakthrough time and a second relation function of the water invasion influence parameter and accumulated gas production, wherein the first relation function comprises the following steps: determining a plurality of design value sets of the water invasion impact parameters; performing numerical simulation processing based on the plurality of design value groups to obtain water breakthrough time and accumulated gas production rate corresponding to the plurality of design value groups; performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine the first relation function and the second relation function, wherein the water invasion influence parameters comprise water discharge;
determining a plurality of first parameter value sets of water invasion influencing parameters of a water-gas reservoir, comprising: acquiring a permeability value, an anisotropy value, a water body energy value and a gas production speed value of the water-gas reservoir; determining a plurality of designed drainage quantity values of the water and gas reservoir, wherein the plurality of designed drainage quantity values comprise a drainage quantity value with a numerical value of 0; determining a plurality of first parameter value sets of water invasion impact parameters of the water-gas reservoir based on the permeability value, the heterogeneity value, the water energy value, the gas production rate value and the plurality of designed drainage value values, wherein the drainage value values in the plurality of first parameter value sets are different, and the first parameter value sets comprise a first parameter value set with a drainage value of 0;
determining a plurality of water breakthrough times and a plurality of cumulative gas production volumes for the water-bearing gas reservoir based on the plurality of first parameter value sets, the first relationship function, and the second relationship function;
comparing the water breakthrough time and the accumulated gas production corresponding to the first parameter value set with the drainage value of 0 with the water breakthrough time and the accumulated gas production corresponding to the first parameter value set with the drainage value of not 0, and determining a water control strategy based on the comparison result, comprising: and if the difference value between the water breakthrough time corresponding to the first parameter value set with the water discharge value not being 0 and the water breakthrough time corresponding to the first parameter value set with the water discharge value being 0 is larger than a first threshold value, and the difference value between the corresponding accumulated gas production and the accumulated gas production corresponding to the first parameter value set with the water discharge value being 0 is larger than a second threshold value, determining that the water control strategy is water discharge, and otherwise, determining that the water control strategy is water control.
2. The method of claim 1, wherein the water invasion impact parameters further comprise permeability, heterogeneity, water body energy, and gas production rate, and the water invasion impact parameter values in the plurality of first parameter value sets other than the drainage quantity value are all the same.
3. The method of claim 1, wherein the first threshold value is a first set percentage of water breakthrough time for the first set of parameter values having a displacement value of 0, and wherein the second threshold value is a second set percentage of cumulative gas production for the first set of parameter values having a displacement value of 0.
4. The method of any one of claims 1-3, wherein after determining a water management strategy, the method further comprises:
and if the determined water control strategy is water drainage, determining a target water drainage quantity value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of first parameter value sets.
5. The method of any of claims 1-3, wherein after determining a water management strategy, the method further comprises:
if the determined water control strategy is water control, determining a plurality of second parameter value groups of water invasion influence parameters of the water-gas reservoir, wherein the water invasion influence parameters comprise gas production speeds, and the gas production speeds in the plurality of second parameter value groups are different;
determining a plurality of water breakthrough times and a plurality of cumulative gas production volumes for the water and gas reservoir based on the plurality of second parameter value sets, the first relationship function, and the second relationship function;
and determining a target gas production speed value of the water-gas reservoir based on a plurality of water breakthrough times and a plurality of accumulated gas production rates corresponding to the plurality of second parameter value sets.
6. An apparatus for determining a water control strategy for a water-gas reservoir, the apparatus comprising:
the acquisition module is used for acquiring a first relation function of the water invasion influence parameter and the water breakthrough time and a second relation function of the water invasion influence parameter and the accumulated gas production, and comprises: determining a plurality of design value sets of the water invasion impact parameters; carrying out numerical simulation treatment on the basis of the plurality of design value groups to obtain water breakthrough time and accumulated gas production corresponding to the plurality of design value groups; performing variance analysis processing based on the plurality of design value groups and the water breakthrough time and the accumulated gas production rate corresponding to the plurality of design value groups to determine the first relation function and the second relation function, wherein the water invasion influence parameters comprise water discharge;
a first determination module for determining a plurality of first parameter value sets for water invasion impact parameters for water reservoirs, comprising: acquiring a permeability value, an anisotropy value, a water body energy value and a gas production speed value of the water-gas reservoir; determining a plurality of designed drainage quantity values of the water and gas reservoir, wherein the plurality of designed drainage quantity values comprise a drainage quantity value with a numerical value of 0; determining a plurality of first parameter value sets of water invasion impact parameters of the water-gas reservoir based on the permeability value, the heterogeneity value, the water energy value, the gas production rate value and the plurality of designed drainage value values, wherein the drainage value values in the plurality of first parameter value sets are different, and the first parameter value sets comprise a first parameter value set with a drainage value of 0;
a second determining module, configured to determine a plurality of water breakthrough times and a plurality of accumulated gas production volumes of the water-bearing gas reservoir based on the plurality of first parameter value sets, the first relation function, and the second relation function;
the comparison module is used for comparing the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of 0 with the water breakthrough time and the accumulated gas production rate corresponding to the first parameter value set with the drainage quantity value of not 0, and determining a water control strategy based on a comparison result, and comprises the following steps: and if the difference value between the water breakthrough time corresponding to the first parameter value group with the drainage quantity value not being 0 and the water breakthrough time corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a first threshold value, and the difference value between the corresponding accumulated gas production and the accumulated gas production corresponding to the first parameter value group with the drainage quantity value being 0 is larger than a second threshold value, determining that the water control strategy is drainage, and otherwise, determining that the water control strategy is water control.
7. A terminal, comprising a processor and a memory, wherein at least one instruction is stored in the memory, and wherein the at least one instruction is loaded and executed by the processor to perform the operations performed by the method for determining a water management strategy with a water reservoir according to any one of claims 1 to 5.
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