Evaluation method, device and equipment for water-locking gas well treatment process and medium

Abstract

The invention discloses an evaluation method, device and equipment for a water-locking gas well treatment process and a medium. The method comprises the following steps: determining an evaluation index of a target gas well according to at least one of a production parameter and a reservoir physical property parameter of the target gas well; wherein the evaluation indexes comprise at least one of the reservoir energy sufficiency degree, the hydrops sensitivity degree and the water blocking degree; aiming at each evaluation index, evaluating the process applicability of treating the target gas well by adopting the to-be-evaluated water-locked gas well treatment process, and respectively determining an applicability coefficient corresponding to each process applicability grade; and determining an evaluation result of the to-be-evaluated water-locked gas well treatment process according to each applicability coefficient and the grade characteristic value corresponding to each process applicability grade. According to the technical scheme, the treatment process is evaluated from the aspects of the reservoir energy sufficiency degree, the hydrops sensitivity degree and the water locking degree, the evaluation accuracy of the water locking gas well treatment process is ensured, and the production efficiency of the gas well is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas development, and in particular to an evaluation method, device, equipment and medium for a water-locked gas well treatment process. Background Art

[0002] As the gas well is produced, the permeability of the gas well reservoir will decrease to varying degrees, and the increase in the contact time between water and bedrock will also cause water lock on the bedrock surface or inside the pores, which will lead to a decrease in gas well production capacity. According to the Jamin effect, water-locked pores will produce higher osmotic pressure, and a higher starting pressure is required to release the water in the pores.

[0003] At present, the treatment processes used for gas wells with reservoir water lock mainly include old well agent drainage process and water lock release process, both of which aim to change the wettability of the reservoir bedrock surface, convert the hydrophilic surface into a gas-philic surface, and fundamentally release the water lock effect. However, relying solely on the use of drainage agents and water lock release agents is not enough to meet the actual mine needs of gas wells. The well site must be treated with other processes such as gas injection. For gas wells in different situations, how to accurately select the optimal comprehensive treatment process method is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] The present application provides an evaluation method, device, equipment and medium for a water-locked gas well treatment process. By taking into account the impact of the target gas well's reservoir energy sufficiency, liquid accumulation sensitivity and water-locking degree on the effect of the water-locked gas well treatment process, the accuracy of the evaluation of the water-locked gas well treatment process is ensured, thereby effectively improving the production efficiency of the gas well.

[0005] According to one aspect of the present application, a method for evaluating a water-locked gas well treatment process is provided, the method comprising:

[0006] Determine an evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree;

[0007] For each of the evaluation indicators, the process applicability of treating the target gas well with the water-locked gas well treatment process to be evaluated is evaluated, and the applicability coefficients corresponding to the applicability levels of each process are determined respectively; wherein, for the same evaluation indicator, the sum of the applicability coefficients is 1;

[0008] The evaluation result of the water-locked gas well treatment process to be evaluated is determined according to each of the applicability coefficients and the grade characteristic value grades corresponding to each of the process applicability.

[0009] According to another aspect of the present application, a device for evaluating a water-locked gas well treatment process is provided, the device comprising:

[0010] An evaluation index determination module is used to determine the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least two of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree;

[0011] The module for determining the suitability coefficient is used to evaluate the suitability of the process for treating the target gas well using the water-locked gas well treatment process to be evaluated for each evaluation index, and to determine the suitability coefficients corresponding to the suitability levels of each process; wherein, for the same evaluation index, the sum of the suitability coefficients is 1;

[0012] The treatment process evaluation module is used to determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability.

[0013] According to another aspect of the present application, an electronic device is provided, the device comprising:

[0014] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the evaluation method for the water-locked gas well treatment process described in any embodiment of the present application.

[0015] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the evaluation method of the water-locked gas well treatment process described in any embodiment of the present application when executed.

[0016] The technical solution provided by the present application determines the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; for each evaluation index, the process applicability of using the water-locked gas well treatment process to be evaluated to treat the target gas well is evaluated, and the applicability coefficients corresponding to each process applicability level are determined respectively; according to each applicability coefficient and the level characteristic value corresponding to each process applicability level, the evaluation result of the water-locked gas well treatment process to be evaluated is determined. This technical solution evaluates the treatment process from the aspects of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree of the target gas well, ensures the accuracy of the evaluation of the water-locked gas well treatment process, and effectively improves the production efficiency of the gas well.

[0017] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A flow chart of an evaluation method for a water-locked gas well treatment process provided in Example 1 of the present application;

[0020] Figure 2 A flow chart of an evaluation method for a water-locked gas well treatment process provided in Example 2 of the present application;

[0021] Figure 3 A schematic diagram of the structure of an evaluation device for a water-locked gas well treatment process provided in Example 3 of the present application;

[0022] Figure 4 It is a structural schematic diagram of an apparatus for implementing an evaluation method for a water-locked gas well treatment process according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "target", "preliminary", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, 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 "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Embodiment 1

[0026] Figure 1 This is a flow chart of a method for evaluating a water-locked gas well governance process provided in Example 1 of the present application. This embodiment is applicable to the situation of evaluating a water-locked gas well governance process. The method can be executed by an evaluation device for a water-locked gas well governance process. The evaluation device for a water-locked gas well governance process can be implemented in the form of hardware and / or software. The evaluation device for a water-locked gas well governance process can be configured in a device with data processing capabilities. Figure 1 As shown, the method includes:

[0027] S110, determining an evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well, wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree.

[0028] Among them, production parameters can be data produced by the target gas well during the development process, such as wellbore structure, well inclination, well diameter, cementing quality, perforation position, test production, production string, oil pressure, casing pressure, gas production, oil production, water production, wellhead temperature, nozzle, separator pressure, water content change, previous operation measures and well logging and testing data, etc. Reservoir physical property parameters can be physical property parameters of oil and gas reservoirs, such as porosity, permeability, water saturation, gas saturation, reservoir type and reservoir thickness, etc.

[0029] It should be noted that unconventional wells such as shale gas, tight gas and total layer devices cannot be put into production directly after drilling and completion. Fracturing is required to establish a seepage channel for industrial gas flow. Therefore, the reservoir physical properties of unconventional wells are the sum of the original matrix parameters and the parameters obtained after fracturing.

[0030] The reservoir energy sufficiency is used to indicate the ability of oil and gas reservoirs to store oil and gas. When the reservoir energy is sufficient, after the water-locking agent interacts with the bedrock pores, the bedrock pore water can be effectively discharged when the well is opened for drainage, increasing the permeability of the gas layer and effectively increasing the gas well production. When the reservoir energy is insufficient, after the water-locking agent interacts with the bedrock pores, the bedrock pore water cannot be fully and effectively discharged when the well is opened for drainage, and can only be partially discharged, the gas layer permeability increases to a limited extent, the gas well production capacity recovery effect is general, and the production increase effect is relatively reduced. When the reservoir energy is scarce, even if the water-locking agent can wet the bedrock pore surface and change the gas wettability, according to the Jamin effect, it still requires a certain amount of starting energy to discharge the water ball in the void. However, due to the lack of reservoir energy, this part of energy cannot be provided by the reservoir, which is often manifested as an increase in gas well water production on a macro scale, so that the subsequent discharged water lock water cannot be effectively carried to the ground, causing water flooding at the bottom of the gas well, and the gas well cannot be effectively restored.

[0031] In the present application, the degree of reservoir energy sufficiency of the target gas well can be determined according to the production parameters of the target gas well.

[0032] Optionally, determining the degree of reservoir energy sufficiency of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well includes: determining the degree of reservoir energy sufficiency of the target gas well according to the shut-in casing pressure and a pre-determined standard for dividing the degree of reservoir energy sufficiency.

[0033] Among them, the shut-in casing pressure can be the wellhead casing pressure value measured after a preset shut-in duration of the target gas well. The pre-determined standard for dividing the degree of reservoir energy sufficiency can be divided according to historical working experience.

[0034] Exemplarily, for gas well A, if the shut-in casing pressure P > 5 MPa, it is determined that the degree of reservoir energy sufficiency is very sufficient; if 4 MPa < P ≤ 5 MPa, it is determined that the degree of reservoir energy sufficiency is relatively sufficient; if 3 MPa < P ≤ 4 MPa, it is determined that the degree of reservoir energy sufficiency is generally sufficient; if 2 MPa < P ≤ 3 MPa, it is determined that the degree of reservoir energy sufficiency is insufficient; if 1 MPa < P ≤ 2 MPa, it is determined that the degree of reservoir energy sufficiency is scarce.

[0035] The sensitivity to liquid accumulation is used to represent the degree of influence of bottom-hole liquid accumulation on production capacity. According to the gas well production curve, for gas wells with a stable gas-water ratio, the effect of the water-lock removal measure is significantly better than that of gas wells with an unstable gas-water ratio. This is because the gas-producing and water-producing horizons of gas wells with a stable gas-water ratio interfere with each other less. The water-lock removal agent can effectively play its role when entering the gas layer or water layer, reducing the water-lock degree of the gas layer, increasing the seepage resistance of the water layer. After the permeability of the gas layer is restored, the ability to carry bottom-hole liquid accumulation is enhanced, further increasing the production pressure difference between the bottom hole and the wellhead, and thus increasing the production to the应有 level. The sensitivity to liquid accumulation intensifies the liquid accumulation situation as the gas well produces, so the effect of the water-lock removal measure will also be worse.

[0036] In the present application, the sensitivity to liquid accumulation of the target gas well can be determined according to the production parameters of the target gas well.

[0037] Optionally, determining the sensitivity to liquid accumulation of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well includes: determining the sensitivity to liquid accumulation of the treatment process for the water-lock gas well to be evaluated according to the produced gas-liquid ratio and a pre-determined standard for dividing the sensitivity to liquid accumulation.

[0038] Among them, the pre-determined liquid accumulation sensitivity classification standards can be divided according to historical work experience. For example, the liquid accumulation sensitivity can be divided into three levels: dull, relatively sensitive and sensitive. Among them, the dull judgment standard is that the water-gas ratio is stable and does not change greatly over time; the relatively sensitive judgment standard is that the water-gas ratio is stable under different gas production conditions but with large differences; the sensitive judgment standard is that the water-gas ratio is unstable, showing obvious reduction in water production with longer production time, liquid accumulation at the bottom of the well, and increased casing pressure.

[0039] Specifically, the gas-liquid ratio data of the target gas well within a preset period can be obtained, and the variance of the gas-liquid ratio is calculated after preprocessing the gas-liquid ratio data. Then, the liquid accumulation sensitivity of the target gas well is determined based on the variance of the gas-liquid ratio and a predetermined liquid accumulation sensitivity classification standard.

[0040] For example, for gas well A, if the gas-liquid ratio variance σ>1.5, the liquid accumulation sensitivity is determined to be sensitive; if 0.5<σ≤1.5, the liquid accumulation sensitivity is determined to be relatively sensitive; if 0<σ≤0.5, the liquid accumulation sensitivity is determined to be insensitive.

[0041] The degree of water lock is used to indicate the degree of influence of water lock effect on the reservoir. The more severe the water lock is, the better the effect of measures to relieve water lock will be. However, since the three factors of reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree restrict and influence each other, the degree of water lock is not directly related to the effect of measures to relieve water lock.

[0042] In the present application, the water locking degree of the target gas well can be determined according to the reservoir physical property parameters of the target gas well.

[0043] Optionally, the water locking degree of the target gas well is determined based on at least one of the production parameters and reservoir physical property parameters of the target gas well, including: determining the water locking degree of the target gas well based on the reservoir permeability, the original water saturation of the reservoir and a predetermined water locking degree classification standard.

[0044] The predetermined water lock degree classification standard can be divided according to historical work experience. For example, the water lock degree can be divided into three levels: severe, general and slight.

[0045] Specifically, the water lock index of the target gas well can be determined according to the reservoir permeability and the original water saturation of the reservoir, and then the water lock degree of the target gas well can be determined according to the water lock index and a predetermined water lock degree classification standard.

[0046] Among them, the water lock index of the target gas well is determined according to the reservoir permeability and the original water saturation of the reservoir, which can be determined by the following formula:

[0047] APTi=αlgKa+βS wi ;

[0048] In the formula, APTi represents the water lock index, Ka represents the reservoir permeability, S wi represents the initial water saturation of the reservoir, α and β are constants. Preferably, α is 0.25 and β is 2.2.

[0049] Exemplarily, if APTi<0, the degree of water locking is determined to be extremely strong; if 0≤APTi<0.3, the degree of water locking is determined to be strong; if 0.3≤APTi<0.7, the degree of water locking is determined to be medium; if 0.7≤APTi<1, the degree of water locking is determined to be weak; if APTi≥1, the degree of water locking is determined to be extremely weak.

[0050] The beneficial effect of the above technical solution is that, based on production parameters and reservoir physical property parameters, the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree of the target gas well are accurately quantified, so as to better determine the current state of the target gas well.

[0051] S120, for each of the evaluation indicators, evaluate the process applicability of treating the target gas well using the water-locked gas well treatment process to be evaluated, and determine the applicability coefficients corresponding to each process applicability level. For the same evaluation indicator, the sum of the applicability coefficients is 1.

[0052] The water-locked gas well treatment process to be evaluated may be one or more treatment processes provided by relevant technical personnel for the target gas well. For example, it may be gas injection + chemical injection + gas injection + well soaking, or chemical injection + gas injection cleaning + well soaking, or chemical injection + gas injection + foam injection + gas injection + well soaking.

[0053] Among them, the process applicability level can be divided into five levels: very applicable, relatively applicable, generally applicable, poorly applicable and not applicable. The applicability coefficient can be the applicability probability of the water-locked gas well treatment process to be evaluated in response to the current evaluation index and the current process applicability level. The larger the applicability coefficient, the greater the applicability probability of the treatment process in response to the current evaluation index and the current process applicability level.

[0054] In this application, the process applicability of the target gas well treated by the water-locked gas well treatment process to be evaluated is evaluated. A correspondence table of each water-locked gas well treatment process and evaluation index, process applicability grade and applicability coefficient can be formulated based on historical work experience and expert analysis; and then the applicability coefficient of the water-locked gas well treatment process to be evaluated at each process applicability grade is determined based on the correspondence table.

[0055] For example, if the reservoir energy sufficiency of the target gas well A is insufficient, the liquid accumulation sensitivity is relatively sensitive, and the water lock degree is average, then the applicability coefficient of the water lock gas well treatment process to be evaluated is determined according to a predetermined corresponding relationship table, as shown in Table 1:

[0056] Table 1

[0057] S1 S2 S3 S4 S5 A4 0 0 0.2 0.7 0.1 B2 0.1 0.1 0.5 0.3 0 C3 0.2 0.3 0.2 0.2 0.1

[0058] Among them, A4 indicates that the reservoir energy sufficiency is insufficient, B2 indicates that the liquid accumulation sensitivity is relatively sensitive, C3 indicates that the water lock degree is general, S1 indicates that the process suitability level is very suitable, S2 indicates that the process suitability level is relatively suitable, S3 indicates that the process suitability level is generally suitable, S4 indicates that the process suitability level is poor, and S5 indicates that the process suitability level is not applicable.

[0059] S130. Determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades.

[0060] Among them, the grade characteristic value can be used to indicate the degree of applicability corresponding to the process applicability grade, and can be determined according to actual needs and historical work experience. For example, if the degree of applicability corresponding to the process applicability grade is higher and the grade characteristic value is larger, then when the value of the evaluation result is larger, the implementation effect of the water-locked gas well treatment process is better. For another example, if the degree of applicability corresponding to the process applicability grade is higher and the grade characteristic value is smaller, then when the value of the evaluation result is smaller, the implementation effect of the water-locked gas well treatment process is better.

[0061] For example, the process applicability level is divided into five levels: very applicable, relatively applicable, generally applicable, poorly applicable, and not applicable. According to the principle that the higher the applicability, the larger the level characteristic value, the corresponding level characteristic value is set to S. T =[0.9 0.7 0.5 0.3 0.1].

[0062] In this application, each applicability coefficient and its corresponding grade characteristic value can be multiplied and summed to determine the evaluation result of the water-locked gas well treatment process to be evaluated. T After calculation, the evaluation result of the water-locked gas well treatment process to be evaluated was obtained to be 1.38.

[0063] Furthermore, the evaluation results of multiple water-locked gas well treatment processes to be evaluated can be calculated simultaneously, and the optimal water-locked gas well treatment process can be determined by comparing the numerical values ​​of each evaluation result. Of course, the evaluation results can also be divided into treatment effect levels based on historical work experience or historical evaluation results, and the optimal water-locked gas well treatment process can be determined based on the treatment effect level corresponding to the evaluation results.

[0064] The embodiment of the present invention provides an evaluation method for a water-locked gas well treatment process, which determines the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; for each evaluation index, the process applicability of treating the target gas well with the water-locked gas well treatment process to be evaluated is evaluated, and the applicability coefficients corresponding to the applicability levels of each process are determined respectively; according to each applicability coefficient and the grade characteristic value corresponding to the applicability level of each process, the evaluation result of the water-locked gas well treatment process to be evaluated is determined. This technical solution evaluates the treatment process from the aspects of the reservoir energy sufficiency, liquid accumulation sensitivity and water locking degree of the target gas well, ensures the accuracy of the evaluation of the water-locked gas well treatment process, and thus effectively improves the production efficiency of the gas well.

[0065] Embodiment 2

[0066] Figure 2 This is a flow chart of an evaluation method for a water-locked gas well treatment process provided in Example 2 of this application. This example is optimized based on the above example. Figure 2 As shown, the method of this embodiment specifically includes the following steps:

[0067] S210: Determine an evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well, wherein the evaluation index includes at least two of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree.

[0068] S220: For each of the evaluation indicators, evaluate the process applicability of treating the target gas well using the water-locked gas well treatment process to be evaluated, and determine the applicability coefficients corresponding to each process applicability level. The sum of the applicability coefficients of the same evaluation indicator at each process applicability level is 1.

[0069] S230: construct a judgment matrix of the target gas well according to each of the evaluation indicators.

[0070] The judgment matrix may be a matrix composed of the relative importance ratios or weights of the evaluation indicators.

[0071] Optionally, constructing a judgment matrix of the target gas well according to each of the evaluation indicators includes but is not limited to the following steps A1-A2:

[0072] Step A1: Obtain the importance comparison result of any two evaluation indicators.

[0073] The importance comparison result may be the contribution of one evaluation index to the water lock release and treatment effect of the target gas well relative to another evaluation index, which may be expressed in numerical values. Specifically, it may be determined based on historical work experience or expert evaluation.

[0074] For example, for target gas well A, the reservoir energy sufficiency is slightly more important than the liquid loading sensitivity. The comparison result of the importance of reservoir energy sufficiency relative to liquid loading sensitivity is: The comparison results of the importance of liquid accumulation sensitivity relative to reservoir energy sufficiency are as follows: The reservoir energy sufficiency is obviously more important than the water lock degree. The comparison result of the importance of the reservoir energy sufficiency relative to the water lock degree is 3, and the comparison result of the importance of the water lock degree relative to the reservoir energy sufficiency is The sensitivity of effusion is obviously more important than the degree of water lock. The comparison result of the importance of the sensitivity of effusion to the degree of water lock is 3, and the comparison result of the importance of the degree of water lock to the sensitivity of effusion is

[0075] Step A2: constructing a judgment matrix of the target gas well according to the importance comparison results.

[0076] Specifically, the judgment matrix of the target gas well can be determined in the following matrix form:

[0077]

[0078] In the formula, D represents the judgment matrix of k evaluation indicators, a pq It represents the comparison result of the importance of the pth evaluation index relative to the qth evaluation index, a k1 It represents the comparison result of the importance of the kth evaluation index relative to the first evaluation index, a 1k It represents the comparison result of the importance of the first evaluation index relative to the kth evaluation index, a kk represents the comparison result of the importance of the kth evaluation index relative to the kth evaluation index. It should be noted that when p=q, the importance comparison result is 1.

[0079] Taking step A1 as an example, the judgment matrix can be constructed as follows:

[0080] S240: Determine weight coefficients corresponding to the evaluation indicators based on the judgment matrix.

[0081] Specifically, the judgment matrix may be normalized by column, and then averaged by row to determine the weight coefficient corresponding to each evaluation index.

[0082] For example, taking the judgment matrix constructed in step A2 as an example, after normalizing the columns, we can obtain: The normalized importance comparison results of each row are summed and averaged to obtain the mean vector Then the mean vector After normalization, we get the weight vector W = [0.486 0.372 0.142].

[0083] S250. Determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the weight coefficients, each of the applicability coefficients, and the grade characteristic values ​​corresponding to each of the process applicability grades.

[0084] Specifically, corresponding weight coefficients can be assigned to different evaluation indicators; for the same process applicability level, the weight coefficient, applicability coefficient and level characteristic value are weighted and summed to determine the evaluation result of the water-locked gas well treatment process to be evaluated.

[0085] Optionally, determining the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the weight coefficients, each of the applicability coefficients, and the grade characteristic values ​​corresponding to each of the process applicability grades includes:

[0086] The evaluation result of the water-locked gas well treatment process to be evaluated is determined by the following formula:

[0087]

[0088] Where, E represents the evaluation result of the water-locked gas well treatment process to be evaluated, and W i represents the weight coefficient of the i-th evaluation index, S j represents the grade characteristic value corresponding to the jth process suitability grade, r ij It represents the suitability coefficient of the i-th evaluation index at the j-th process suitability level, n represents the number of evaluation indicators, and m represents the number of process suitability levels.

[0089] The embodiment of the present invention provides an evaluation method for a water-locked gas well treatment process, which determines the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least two of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; for each evaluation index, the process applicability of treating the target gas well with the water-locked gas well treatment process to be evaluated is evaluated, and the applicability coefficients corresponding to the applicability levels of each process are determined respectively; a judgment matrix of the target gas well is constructed according to each evaluation index; weight coefficients corresponding to each evaluation index are determined based on the judgment matrix; and the evaluation result of the water-locked gas well treatment process to be evaluated is determined according to each weight coefficient, each applicability coefficient and the grade characteristic value corresponding to each process applicability level. This technical solution further improves the accuracy of the evaluation of the water-locked gas well treatment process by setting weight coefficients for the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree.

[0090] Embodiment 3

[0091] Figure 3 This is a schematic diagram of the structure of an evaluation device for a water-locked gas well treatment process provided in Example 3 of the present application. Figure 3 As shown, the device comprises:

[0092] An evaluation index determination module 310 is used to determine the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree;

[0093] The suitability coefficient determination module 320 is used to evaluate the process suitability of treating the target gas well using the water-locked gas well treatment process to be evaluated for each evaluation index, and determine the suitability coefficients corresponding to each process suitability level; wherein, for the same evaluation index, the sum of the suitability coefficients is 1;

[0094] The treatment process evaluation module 330 is used to determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability.

[0095] An embodiment of the present invention provides an evaluation device for a water-locked gas well treatment process, which determines the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity, and water lock degree; for each evaluation index, the process applicability of treating the target gas well with the water-locked gas well treatment process to be evaluated is evaluated, and the applicability coefficients corresponding to each process applicability level are determined respectively; according to each applicability coefficient and the level characteristic value corresponding to each process applicability level, the evaluation result of the water-locked gas well treatment process to be evaluated is determined. This technical solution evaluates the treatment process from the aspects of the reservoir energy sufficiency, liquid accumulation sensitivity, and water lock degree of the target gas well, ensures the accuracy of the evaluation of the water-locked gas well treatment process, and thus effectively improves the production efficiency of the gas well.

[0096] Furthermore, the evaluation index includes at least two of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; the device also includes:

[0097] A judgment matrix construction module, used to construct a judgment matrix of the target gas well according to each of the evaluation indicators before determining the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades;

[0098] A weight coefficient determination module, used to determine the weight coefficient corresponding to each of the evaluation indicators based on the judgment matrix;

[0099] Accordingly, the treatment process evaluation module 330 includes:

[0100] The treatment process evaluation unit is used to determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the weight coefficients, each of the applicability coefficients and the grade characteristic value corresponding to each of the process applicability grades.

[0101] Furthermore, the judgment matrix construction module includes:

[0102] An importance comparison unit, used to obtain the importance comparison result of any two evaluation indicators;

[0103] The judgment matrix construction unit is used to construct the judgment matrix of the target gas well according to each of the importance comparison results.

[0104] Furthermore, the treatment process evaluation unit is specifically used to:

[0105] The evaluation result of the water-locked gas well treatment process to be evaluated is determined by the following formula:

[0106]

[0107] Where, E represents the evaluation result of the water-locked gas well treatment process to be evaluated, and W i represents the weight coefficient of the i-th evaluation index, S j represents the grade characteristic value corresponding to the jth process suitability grade, r ij It represents the suitability coefficient of the i-th evaluation index at the j-th process suitability level, n represents the number of evaluation indicators, and m represents the number of process suitability levels.

[0108] Furthermore, the evaluation index determination module 310 includes:

[0109] The reservoir energy sufficiency determination unit is used to determine the reservoir energy sufficiency of the target gas well according to the shut-in casing pressure and a predetermined reservoir energy sufficiency classification standard.

[0110] Furthermore, the evaluation index determination module 310 includes:

[0111] The liquid loading sensitivity determination unit is used to determine the liquid loading sensitivity of the water-locked gas well treatment process to be evaluated according to the production gas-liquid ratio and a predetermined liquid loading sensitivity classification standard.

[0112] Furthermore, the evaluation index determination module 310 includes:

[0113] The water lock degree determination unit is used to determine the water lock degree of the target gas well according to the reservoir permeability, the original water saturation of the reservoir and a predetermined water lock degree classification standard.

[0114] An evaluation device for a water-locked gas well treatment process provided in an embodiment of the present application can execute an evaluation method for a water-locked gas well treatment process provided in any embodiment of the present application, and has functional modules and beneficial effects corresponding to the execution method.

[0115] Embodiment 4

[0116] Figure 4 A schematic diagram of a device 10 that can be used to implement an embodiment of the present application is shown. The device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0117] like Figure 4 As shown, the device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the device 10 can also be stored. The processor 11, ROM 12 and RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0118] A number of components in the device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0119] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the evaluation method of the water-locked gas well treatment process.

[0120] In some embodiments, the evaluation method of the water-locked gas well governance process can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the evaluation method of the water-locked gas well governance process described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the evaluation method of the water-locked gas well governance process in any other appropriate manner (for example, by means of firmware).

[0121] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0122] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions / operations specified in the flow charts and / or block diagrams are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0123] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device or equipment. A computer readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0124] To provide interaction with a user, the systems and techniques described herein can be implemented on a device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0125] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0126] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0127] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document is not limited here.

[0128] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A method for evaluating a water-locked gas well treatment process, characterized in that: The method comprises: Determine an evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; For each of the evaluation indicators, the process applicability of treating the target gas well with the water-locked gas well treatment process to be evaluated is evaluated, and the applicability coefficients corresponding to the applicability levels of each process are determined respectively; wherein, for the same evaluation indicator, the sum of the applicability coefficients is 1; The evaluation result of the water-locked gas well treatment process to be evaluated is determined according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades.

2. The method according to claim 1, characterized in that The evaluation indexes include at least two of the following: reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; Before determining the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades, the method further includes: Constructing a judgment matrix of the target gas well according to each of the evaluation indicators; Determine the weight coefficient corresponding to each evaluation index based on the judgment matrix; Accordingly, according to each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades, the evaluation result of the water-locked gas well treatment process to be evaluated is determined, including: The evaluation result of the water-locked gas well treatment process to be evaluated is determined according to each of the weight coefficients, each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades.

3. The method according to claim 2, characterized in that Constructing a judgment matrix of the target gas well according to each of the evaluation indicators includes: Obtain the importance comparison results of any two evaluation indicators; According to each of the importance comparison results, a judgment matrix of the target gas well is constructed.

4. The method according to claim 2, characterized in that: According to each of the weight coefficients, each of the applicability coefficients and the grade characteristic values ​​corresponding to each of the process applicability grades, the evaluation result of the water-locked gas well treatment process to be evaluated is determined, including: The evaluation result of the water-locked gas well treatment process to be evaluated is determined by the following formula: Where, E represents the evaluation result of the water-locked gas well treatment process to be evaluated, and W i represents the weight coefficient of the i-th evaluation index, S j represents the grade characteristic value corresponding to the jth process suitability grade, r ij It represents the suitability coefficient of the i-th evaluation index at the j-th process suitability level, n represents the number of evaluation indicators, and m represents the number of process suitability levels.

5. The method according to claim 1, characterized in that Determining the reservoir energy sufficiency of the target gas well according to at least one of the production parameter and the reservoir physical property parameter of the target gas well includes: The reservoir energy sufficiency of the target gas well is determined according to the shut-in casing pressure and a predetermined reservoir energy sufficiency classification standard.

6. The method according to claim 1, characterized in that Determining the liquid loading sensitivity of the target gas well according to at least one of a production parameter and a reservoir physical property parameter of the target gas well includes: The liquid loading sensitivity of the target gas well is determined according to the production gas-liquid ratio and a predetermined liquid loading sensitivity classification standard.

7. The method according to claim 1, characterized in that Determining the water locking degree of the target gas well according to at least one of the production parameter and reservoir physical property parameter of the target gas well includes: The water locking degree of the target gas well is determined according to the reservoir permeability, the original water saturation of the reservoir and a predetermined water locking degree classification standard.

8. An evaluation device for water-locked gas well treatment technology, characterized in that: The device comprises: An evaluation index determination module is used to determine the evaluation index of the target gas well according to at least one of the production parameters and reservoir physical property parameters of the target gas well; wherein the evaluation index includes at least one of the reservoir energy sufficiency, liquid accumulation sensitivity and water lock degree; The module for determining the suitability coefficient is used to evaluate the process suitability of treating the target gas well with the water-locked gas well treatment process to be evaluated according to each of the evaluation indicators, and to determine the suitability coefficients corresponding to the suitability levels of each process respectively; wherein, for the same evaluation indicator, the sum of the suitability coefficients is 1; The treatment process evaluation module is used to determine the evaluation result of the water-locked gas well treatment process to be evaluated according to each of the applicability coefficients and the grade characteristic value level corresponding to each of the process applicability.

9. An electronic device, characterized in that: The device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the evaluation method of the water-locked gas well treatment process described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the evaluation method of the water-locked gas well treatment process according to any one of claims 1 to 7 when executed.

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