A method, device and equipment for developing high-quality reserve areas of water-bearing tight gas reservoirs

Abstract

The present invention discloses a method, device and equipment for developing high-quality reserve areas in water-bearing tight gas reservoirs. The method comprises: comparing gas test data and / or production data of gas wells with a pre-constructed water-producing gas well identification map to determine the water production type; constructing a sonic time-difference-resistivity intersection map based on the sonic time-difference logging curve and the resistivity logging curve of the gas well to identify the water-bearing layer of the gas well; correcting the water-bearing layer in the gas well based on the water production type identified by the water-producing gas well identification map; performing a well-connected profile analysis on the gas well based on the corrected aquifer to obtain the aquifer distribution of the gas reservoir; determining the high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir; and determining a reasonable production allocation ratio of the gas wells deployed in the high-quality reserve area based on the gas test open-flow rate and a pre-constructed production allocation coefficient change map corresponding to gas wells of different water production types, so as to realize the development of the water-bearing tight gas reservoir.

Description

Technical Field

[0001] The present invention relates to the technical field of tight gas reservoir development, and in particular to a method, device and equipment for developing a high-quality reserve area of ​​a water-containing tight gas reservoir. Background Art

[0002] my country's tight gas resources are enormous and are an important pillar for ensuring the sustained growth of natural gas in the country. However, due to the strong heterogeneity, extremely low permeability, and high water saturation of tight gas reservoirs, gas field development is difficult. The "three lows" problem of low reserve control, low single-well productivity, and low recovery rate is prevalent, and the effective utilization of reserves faces severe challenges. Currently, due to the poor connectivity between reservoir water bodies and the complex gas-water relationship, water production and wellbore liquid accumulation are common during the production process of gas wells put into production, making it temporarily difficult to effectively utilize a large amount of geological reserves. During the specific construction process, in order to increase the utilization of reserves in water-bearing tight gas reservoirs and achieve effective development, we will fully combine the production status of gas wells, optimize the production allocation system for water-producing gas wells, and provide a basis for the development and deployment of water-bearing tight gas reservoirs. Summary of the Invention

[0003] In order to enrich process routes and increase selection space, the embodiments of the present invention provide a method, device and equipment for developing high-quality reserve areas of water-bearing tight gas reservoirs.

[0004] In a first aspect, an embodiment of the present invention provides a method for developing a high-quality reserve area of ​​a water-bearing tight gas reservoir, which may include:

[0005] Comparing the gas test data and / or production data of the gas well with a pre-built water-producing gas well identification chart to determine the water production type of the gas well; the water production types of the gas well include: low water production type gas well, medium-high water production type gas well, and atmospheric water type gas well;

[0006] constructing an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the aquifer of the gas well;

[0007] Correcting the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate;

[0008] Performing a well-connected profile analysis on the gas well based on the corrected aquifer to obtain the aquifer distribution of the water-bearing tight gas reservoir;

[0009] determining a high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir;

[0010] Based on the open-flow rate of the gas test and the pre-constructed production allocation coefficient change chart corresponding to gas wells of different water production types, the reasonable production allocation ratio of the gas wells deployed in the high-quality reserve area is determined to realize the development of the water-bearing tight gas reservoir.

[0011] Optionally, the water- and gas-producing well identification chart is pre-constructed according to the following method:

[0012] Obtaining gas test data and / or production data of a preset number of gas wells in the area where the water-bearing tight gas reservoir is located or in similar areas;

[0013] Based on the comparison result of the open flow value, water-gas ratio or casing pressure change value included in the gas test data and / or production data of the gas well and the preset threshold value, the water production type of the gas well is classified; wherein the water production type of the gas well includes: low water production type gas well, medium-high water production type gas well and atmospheric water type gas well;

[0014] Based on the gas test data and / or production data of different types of gas wells, a water-producing gas well identification chart for different types of gas wells is constructed.

[0015] Optionally, the production allocation coefficient change chart corresponding to the gas wells of different water production types is pre-constructed by the following method:

[0016] Obtain the open-gas flow rate of several gas wells and the average gas production in the initial stage of production;

[0017] Based on the water-gas ratio of the gas wells and the preset water-gas ratio threshold, the water production types of several gas wells are divided to construct the average daily gas production and test open-flow rate distribution maps of gas wells with different water production types;

[0018] Based on the correlation between the average daily gas production of the gas wells of different water production types and the open flow rate of the gas test, regression processing is performed to establish a theoretical production allocation chart for the water production wells of the gas wells of different water production types;

[0019] Based on the production allocation and test gas open flow rate in the water production well production allocation theoretical chart, determine the production allocation coefficients of gas wells of different water production types at different test gas open flow rates;

[0020] The production allocation coefficient variation chart is formed based on the production allocation coefficients of gas wells of different water production types at different test open-flow rates, and the open-flow rates.

[0021] Optionally, the method for constructing a production allocation coefficient change chart corresponding to gas wells of different water production types may further include:

[0022] Based on the production allocation coefficient change trend in the production allocation coefficient change chart, the open flow rate change interval threshold of gas wells with different water production types is determined to construct a reasonable production allocation table for gas wells with different water production types in different open flow rate change intervals.

[0023] Optionally, the development of the high-quality reserve area of ​​the water-containing tight gas reservoir may also include: designing corresponding water drainage and gas production plans for the gas wells deployed in the high-quality reserve area, so as to develop the water-containing tight gas reservoir in combination with the reasonable production allocation ratio of the gas wells.

[0024] Optionally, designing a corresponding drainage and gas production plan for the gas well includes:

[0025] Based on the energy storage coefficient, open flow rate of gas test, and water-gas ratio of the water-bearing tight gas reservoir, the high-quality reserve area is divided to obtain different types of gas reservoir areas; wherein the energy storage coefficient is determined based on the effective thickness, porosity, and gas saturation of the reservoir;

[0026] Based on different types of gas reservoir areas and the production methods of gas wells deployed therein, design a drainage and gas production plan for the gas wells to achieve the development of the water-bearing tight gas reservoirs;

[0027] Among them, different types of gas reservoir areas include: Class I areas, Class II areas and Class III areas. Class I areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both greater than a preset threshold, and the water-gas ratio is less than a preset threshold; Class II areas are areas between Class I areas and Class III areas; Class III areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both less than a preset threshold, and the water-gas ratio is greater than a preset threshold;

[0028] The production methods of the gas well include: single-layer gas layer production and multi-layer gas layer combined production.

[0029] Optional drainage and gas recovery plans for gas wells include:

[0030] If the gas well is located in a Class I area, and the thickness of a single gas layer in the gas-bearing reservoir in the Class I area is greater than 5 m or the thickness of a combined gas layer is greater than 8 m, throttling production is performed in the initial stage of gas production, and auxiliary plunger and / or foam drainage measures are adopted in the later stage;

[0031] If the gas well is located in a Class II or Class III area, a plunger device will be directly used during the completion phase. If the liquid accumulation is severe, a combined drainage and gas recovery measure of gas lift + bubble drainage / gas lift + plunger will be adopted.

[0032] In a second aspect, an embodiment of the present invention provides a device for developing a high-quality reserve area of ​​a water-bearing tight gas reservoir, the device comprising:

[0033] A comparison and judgment module is used to compare the gas test data and / or production data of the gas well with a pre-built water-producing gas well identification chart to determine the water production type of the gas well; the water production types of the gas well include: low water production type gas well, medium-high water production type gas well, and atmospheric water-rich type gas well;

[0034] a water layer identification module, configured to construct an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the water-bearing layer of the gas well;

[0035] a water layer correction module, configured to correct the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate;

[0036] a well connection analysis module, configured to perform a well connection profile analysis on the gas well based on the corrected aquifer to obtain the aquifer distribution of the water-bearing tight gas reservoir;

[0037] a sweet spot determination module, configured to determine a high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir;

[0038] The production allocation ratio determination module is used to determine the reasonable production allocation ratio of the gas wells deployed in the high-quality reserve area based on the test gas open flow rate and the pre-constructed production allocation coefficient change chart corresponding to the gas wells of different water production types, so as to realize the development of the water-bearing tight gas reservoir.

[0039] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for developing high-quality reserve areas of water-bearing tight gas reservoirs as described in the first aspect.

[0040] In a fourth aspect, an embodiment of the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for developing high-quality reserve areas of water-containing tight gas reservoirs as described in the first aspect is implemented.

[0041] The beneficial effects of the above technical solutions provided by the embodiments of the present invention include at least:

[0042] The present invention provides a method, device, and equipment for developing high-quality reserves in water-bearing tight gas reservoirs. This method first determines the water production type of a gas well using the water-gas ratio, then quickly and accurately retrieves the production allocation value for the gas well based on a chart. This method not only improves production allocation accuracy but also provides a scientific basis for production allocation systems for gas wells with different water production types. Furthermore, it provides guidance for the development and deployment of tight gas reservoirs.

[0043] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0044] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 A flow chart of a method for developing a high-quality reserve area of ​​a water-bearing tight gas reservoir provided in an embodiment of the present invention;

[0047] Figure 2 Schematic diagram of analysis of produced water and its source provided in an embodiment of the present invention;

[0048] Figure 3 A pre-built water- and gas-producing well identification chart provided in an embodiment of the present invention;

[0049] Figure 4 A production characteristic diagram of a low-water-yield gas well provided in an embodiment of the present invention;

[0050] Figure 5 This is a production characteristic diagram of a medium-high water type gas well provided in an embodiment of the present invention;

[0051] Figure 6 This is a production characteristic diagram of a large atmospheric water type gas well provided in an embodiment of the present invention;

[0052] Figure 7 This is a cross-plot of acoustic transit time and deep lateral resistivity of the sandstone reservoir of the He 8th Member in the southern area of ​​the Sulige Gas Field provided in an embodiment of the present invention;

[0053] Figure 8 A cross-plot of acoustic transit time and deep lateral resistivity of the sandstone reservoir of the Shan 1 section in the southern area of ​​the Sulige gas field provided in an embodiment of the present invention;

[0054] Figure 9 A flow chart for constructing a production allocation coefficient change chart corresponding to gas wells of different water production types provided in an embodiment of the present invention;

[0055] Figure 10 The three-year average daily production and open flow rate distribution diagram of gas wells with different water production types provided in the embodiment of the present invention;

[0056] Figure 11 The theoretical diagram of water production well allocation provided in the embodiment of the present invention;

[0057] Figure 12 A chart showing changes in production allocation coefficients for gas wells of different water production types at different open-gas flow rates provided in an embodiment of the present invention;

[0058] Figure 13 This is a schematic structural diagram of a development device for a high-quality reserve area of ​​a water-bearing tight gas reservoir provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0059] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0060] During the development of the oil field, the inventors discovered that for water-bearing tight gas reservoirs, due to the poor connectivity between reservoir water bodies and the complex gas-water relationship, water production and wellbore liquid accumulation are common during the production process of the gas wells put into production. The dynamic reserves and production capacity of a single well are far below the average level of the gas field, making it temporarily difficult to effectively mobilize a large amount of geological reserves. Furthermore, the inventors also found that when allocating production to water-producing gas wells in water-bearing tight gas reservoirs, firstly, the water production type of the gas wells was not effectively divided, and secondly, the production allocation values ​​were all processed based on empirical data, and production allocation plans for gas wells of different water production types were not designed in a targeted manner. This resulted in the inability to guarantee the accuracy of the production allocation values ​​and the inability to provide an effective basis for the development and deployment of non-water-bearing tight gas reservoirs. Based on the above-mentioned shortcomings in the existing technology, the inventors innovatively proposed the present invention.

[0061] In the embodiment of the present invention, a method for developing a high-quality reserve area of ​​a water-bearing tight gas reservoir is provided. Figure 1 As shown, the method may include the following steps:

[0062] Step S11: Compare the gas test data and / or production data of the gas well with the pre-built water-producing gas well identification chart to determine the water production type of the gas well; the water production types of the gas well include: low water production type gas well, medium to high water production type gas well and atmospheric water type gas well.

[0063] The embodiment of the present invention is to first strip the aquifer of a certain block or the entire gas reservoir before developing a water-bearing tight gas reservoir, and then design a targeted gas well production allocation plan to achieve the purpose of effectively utilizing the gas reservoir. The inventor proposed this solution in view of the shortcomings of the prior art in that the gas-water relationship is not effectively separated and the produced water is not effectively analyzed, and the type of water produced by the gas well cannot be effectively identified. It should be noted that the above-mentioned gas well in this step in this embodiment is an evaluation well, and the production allocation and drainage collection in the project are carried out by simulation based on the data of the evaluation well.

[0064] In a specific example, the inventors analyzed the gas wells that have been tested or produced, and divided the water types of the gas wells into three categories according to the underground distribution of the produced water: condensate water, formation pore water, and special locally sealed formation water. Since the condensate water in the tight sandstone gas layer is very small, with an average of 0.08m 3 / 10 4 m 3 The main sources of water production in tight sandstone gas reservoirs are pore water and special locally sealed formation water.

[0065] Reference Figure 2 As shown in the figure, the development of water-bearing tight gas reservoirs first requires determining whether a gas well produces water. However, due to the simplified production process of downhole throttling employed in gas fields, water-producing wells cannot be visually identified. Therefore, dynamic monitoring data combined with field tests were used to identify water-producing gas wells in the block. This study first determined whether a gas well produced water using dynamic monitoring data such as pressure gauge liquid level detection, simplified gas testing, and gas-liquid metering field tests. The differences between these two types of wells were then compared and analyzed in production performance data. Furthermore, the production performance data were used to identify the type of water-producing well. A comprehensive analysis of the gas testing and production performance monitoring data of the producing wells led to the classification of the producing wells into four types: water-free, low-water-producing, medium-to-high-water-producing, and atmospheric-water-producing.

[0066] The distribution of gas and water in water-bearing tight (sandstone) gas reservoirs is mainly controlled by factors such as hydrocarbon generation intensity, regional structure, and heterogeneity. Figure 2 As shown in the figure, based on the spatial distribution characteristics of formation water and the underground storage state of produced water, the types of water produced by gas wells can be divided into three categories: condensate water, formation pore water, and special locally sealed formation water. Since the condensate water in tight sandstone gas reservoirs is very small, with an average of 0.08m 3 / 10 4 m 3 , which can be basically ignored. Among them, formation pore water and special locally sealed formation water are the main sources of water production in tight sandstone gas reservoirs. Formation pore water is widely present in the formation, and in gas well production, it manifests as low-water-yield gas wells (water-gas ratio less than 0.5 cubic meters per 10,000 cubic meters) and medium-water-yield gas wells (water-gas ratio greater than 0.5 cubic meters per 10,000 cubic meters). Special locally sealed formation water, although partially sealed in the formation, is large in scale, resulting in gas well production often showing atmospheric water type (water-gas ratio greater than 1 cubic meter per 10,000 cubic meters).

[0067] Moreover, the higher the gas-water ratio of the reservoir encountered, the easier it is for the gas well to produce both gas and water after reservoir fracturing and communication. There is basically no water-free gas production period in the production process. The initial production decreases rapidly and the water-gas ratio gradually increases. In the later stage, due to the deterioration of the reservoir resource grade of the new wells and water accumulation in the old wells, the final cumulative production is low and the comprehensive decline rate of the gas field shows an upward trend, making it difficult to control the decline as a whole.

[0068] In the embodiment of the present invention, this step is based on a comparison of a preset threshold value of production data, which is quick and convenient and can quickly determine the water production type of the gas well.

[0069] In an optional embodiment, the water-producing gas well identification chart is pre-constructed according to the following method:

[0070] First, gas test data and / or production data are obtained for a predetermined number of gas wells in the area containing the water-bearing tight gas reservoir or in similar areas. In this embodiment of the present invention, analysis is performed on gas wells that have undergone gas testing or production in the same block or reservoir. If the number of gas wells in the block or reservoir is small (insufficient sample data), gas test data and / or production data from gas wells in similar areas can also be used as sample data for constructing the identification map.

[0071] Next, based on the comparison of the open flow rate, water-to-gas ratio, or casing pressure change values ​​included in the gas well's gas test data and / or production data with preset thresholds, the gas well's water production type is classified. The water production types of gas wells can be divided into low-water-yield gas wells, medium-to-high-water-yield gas wells, and atmospheric-water-rich gas wells. Finally, based on the gas test data and / or production data of different gas well types, a water-producing gas well identification chart is constructed for each type of gas well.

[0072] Reference Figure 3 The identification chart constructed as shown in the figure is as follows: The comparison results of the open flow rate, water-gas ratio, and casing pressure change values ​​of the four types of gas wells with the preset thresholds are as follows:

[0073] (1) Low water production gas wells: Most of them are normal gas wells with long-term stable production, with high open flow during gas testing, and water-gas ratio <0.5m 3 / 10,000m 3 The casing pressure drop is slow in the initial stage of production (casing pressure drop <0.02MPa / d), and the production wells still have a long period of stable production under low pressure conditions.

[0074] (2) Medium water-producing gas wells: The well logging curve of the producing layer has a good gas-bearing response, and the gas test conclusion is mostly gas-bearing layer. During the gas test, basically no water or a small amount of water is produced (the water-gas ratio is 0.5-1.0m 3 / 10,000m 3 ), resulting in a low open-flow rate. The production curve shows a rapid initial decrease in casing pressure drop (>0.02 MPa / d), resulting in low daily gas production. Later, due to liquid accumulation, the gas well enters a period of low production and inefficiency. While logging data from the producing well indicates good gas content, water production during early production indicates that the primary source of water during production is capillary water within the producing stratum.

[0075] (3) High-water-yield gas wells: The gas-bearing response of the logging curve of the production layer is good, and the gas test conclusion is mostly gas layer. There is basically no water or a small amount of water during the gas test (the water-gas ratio is 0.5-1.0m 3 / 10,000m 3 ), with a high open flow rate. The production curve shows a slow initial drop in casing pressure and stable production, followed by a rapid decline in both casing pressure and production. The gas well begins to produce water, with significant liquid accumulation in the wellbore, marking a period of low production and low efficiency. While logging data from the producing well section indicates good gas content, water production in the later stages of production indicates that the primary source of this water is formation water in the surrounding rocks above and below the gas layer.

[0076] (4) Atmospheric and large water type gas wells: The logging interpretation and gas test conclusions of the production layer are generally water-bearing gas layers or gas-water layers, which may be formation pore water or formation water. The water-gas ratio is relatively high (>1.0m 3 / 10,000m3), the production curve shows that the initial stage is a rapid decline in casing pressure, the formation energy drops rapidly, the low-yield and low-efficiency period is long, and the production effect is poor.

[0077] In a specific example, referring to Figures 4 to 6 As shown in the figure, according to the daily gas production data and pressure data of various types of gas wells in the actual production process, it can be obtained that the initial production of low water production wells is 11,000 cubic meters / day, the initial pressure drop rate is 0.0185 MPa / d, the casing pressure is 10.4 MPa after 990 days of production, the average gas production in three years is 11,400 cubic meters, the cumulative gas production at the end of three years is 11.31 million cubic meters, and the final cumulative production is predicted to be 25.31 million cubic meters; the initial production of medium and high water production gas wells is 8,400 cubic meters / day, the initial pressure drop rate is 0.02 After 990 days of production at 255 MPa / day, the casing pressure reached 10.55 MPa. The three-year average gas production was 7,300 cubic meters, and the cumulative gas production at the end of the three years was 7.26 million cubic meters, with a predicted final cumulative production of 14.55 million cubic meters. Atmospheric and high-water-producing wells had an initial production of 13,600 cubic meters / day and an initial pressure drop rate of 0.0235 MPa / day. After 990 days of production, the casing pressure reached 9.68 MPa. The three-year average gas production was 13,500 cubic meters, and the cumulative gas production at the end of the three years was 9.86 million cubic meters, with a predicted final cumulative production of 22.1 million cubic meters. Furthermore, the type of gas well can be determined based on daily gas production data, pressure data, and well development indicators. Low-water-producing wells have the highest EUR values ​​and are least affected by water production. Medium-to-high-water-producing wells have lower EUR values ​​and are key targets for optimization measures. Atmospheric and high-water-producing wells also have high EUR values, but they produce significant water in the later stages of production, requiring strengthened well management to prevent waterlogging.

[0078] Step S12: constructing an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the water-bearing layer of the gas well.

[0079] This step further combines well logging data, gas testing data, and production performance data to pinpoint the specific location of water production in the water-producing layer. In a specific example, combined with gas testing results from 121 individual layers in a water-bearing gas reservoir, well logging rock-electrical relationship analysis was conducted. The resistivity-density and resistivity-acoustic intersections revealed no clear pattern in the rock-electrical relationships between gas layers, gas-water layers, and layers containing both gas and water. However, for gas-bearing reservoirs, both acoustic transit time logging parameters and resistivity logging parameters provide good indications of gas content, providing a clearer picture. Therefore, the intersection of acoustic transit time and resistivity parameters is used to identify gas and water layers.

[0080] Reference Figure 7 and Figure 8 As shown, to accurately identify water-producing layers, logging data from gas test and production wells is used to identify them. There is no fixed limit for the resistivity of gas-water layers; as the acoustic transit time decreases, the resistivity of gas layers increases; water layers are characterized by low to medium acoustic transit times and high resistivity. For example, in the southern area of ​​the Sulige gas field, the distribution parameters of water-bearing tight gas reservoirs are as follows: when the acoustic transit time in Section 8 is less than 230 μs / m and the resistivity is greater than 20 Ω·m, the reservoir contains water; when the acoustic transit time in Section 1 is less than 220 μs / m and the resistivity is greater than 28 Ω·m, the reservoir contains water.

[0081] It should be noted that the above-mentioned step S11 and step S12 in the embodiment of the present invention are executed in no particular order. Step S11 can be executed first and then step S12, or step S12 can be executed first and then step S11. Of course, step S11 and step S12 can also be executed at the same time. The embodiment of the present invention does not make any specific limitations on this.

[0082] Step S13: Correcting the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate.

[0083] This step combines comprehensive analysis with gas testing, production dynamics monitoring data, water-producing well identification charts, and acoustic transit time-resistivity intersection plots to identify water-producing wells and their locations. This allows for the identification of relatively high-quality reserves, where vertical and horizontal gas zones are well-developed but aquifers are underdeveloped.

[0084] In this step, although there are errors in the identification of aquifers using well logging data, the accuracy of the plate identification performed in step S11 is relatively high, so a correction can be made to determine the accuracy of the water layer identified in step S12. For example, if gas wells 1, 2, and 3 are adjacent gas wells, and all three are identified as water-producing wells during identification in step S11, when the logging data is used to determine the specific aquifers in step S12, only gas wells 1 and 3 are identified as aquifers at a certain level, while gas well 2 is not. Therefore, the identification results from step S11 are used to correct step S12, confirming that an aquifer also exists in the corresponding level of gas well 2, allowing subsequent well-connected profile analysis to determine the aquifer and its distribution range.

[0085] Step S14: Perform well-connected profile analysis on the gas wells based on the corrected aquifers to obtain the aquifer distribution of the water-bearing tight gas reservoir.

[0086] Steps S11 to S14 of the present invention identify aquifers in water-bearing tight gas reservoirs. Water-producing wells within the gas wells are identified by comparing the gas well's gas test data and / or production data with a pre-established water-producing gas well identification map. The water-bearing strata determined based on the well logging data are then corrected, and the corrected results are used to perform a well-connected profile analysis to determine the aquifer distribution. The present invention fully integrates reservoir geological characteristics and production dynamics data to accurately determine the aquifer distribution in the study area or gas reservoir by establishing a water-producing well identification map and an acoustic transit time-resistivity intersection map. This combined dynamic and static approach provides a basis for subsequent gas reservoir development.

[0087] Step S15: Based on the distribution of aquifers and the distribution of gas reservoirs in the water-bearing tight gas reservoirs, determine the high-quality reserve areas of the water-bearing tight gas reservoirs.

[0088] During the specific implementation of this step, based on the distribution of aquifers and the distribution of gas reservoirs in water-bearing tight gas reservoirs, areas with developed vertical and horizontal gas layers but undeveloped water layers are selected as high-quality reserve areas of water-bearing tight gas reservoirs.

[0089] Step S16: Based on the open-flow rate of the gas test and the pre-constructed production allocation coefficient change chart corresponding to gas wells of different water production types, determine the reasonable production allocation ratio of gas wells deployed in the high-quality reserve area to achieve the development of water-bearing tight gas reservoirs.

[0090] The chart of production allocation coefficient changes for different water-producing gas wells in this step can help determine the production allocation of different water-producing well types, thereby guiding the production allocation needs of different water-producing wells. Compared to the existing method of directly allocating production to gas wells without water-producing types based on experience, this method first determines the water-producing type of the gas well by water-gas ratio, and then quickly and accurately retrieves the production allocation value for the gas well based on the chart. This method not only improves the accuracy of production allocation, but also provides a scientific basis for the production allocation system for gas wells with different water-producing types. Furthermore, it has guiding significance for the development and deployment of tight gas reservoirs.

[0091] The production allocation coefficient change chart corresponding to different water production types of gas wells in this step is pre-built by the following method, referring to Figure 9 As shown, the following steps may be specifically included:

[0092] Step S91: Obtain the open-gas flow rate during gas testing and the average gas production in the initial stage of production of several gas wells.

[0093] This step analyzes the stable production of gas wells over the first three years of a gas field. The collected initial production data is the average gas production over the first three years. For example, in this embodiment, the open-flow rate data for gas testing and the stable production of gas wells over the first three years were collected from 202 water-producing gas wells in the Sulige Gas Field in the Ordos Basin and the Xujiahe Gas Field in the Sichuan Basin. This was used to systematically evaluate the relationship between the open-flow rate data for gas testing and the stable production of gas wells over the first three years for different types of water-producing wells.

[0094] Step S92: comparing the gas test data and / or production data of the gas well with a pre-built water-producing gas well identification chart to determine the water production type of the gas well.

[0095] After obtaining data from several gas wells, this step requires classifying the water production types of the gas wells and establishing corresponding relationships accordingly. This will better demonstrate their distribution patterns from the distribution map, i.e., the zoning will be obvious.

[0096] Step S93: construct the distribution diagrams of average daily gas production and open-flow rate of gas test of different water production types. Figure 10 As shown in the figure, the three-year average daily production and open flow rate distribution diagram of gas wells with different water production types is constructed. The gas distribution of gas wells with different water production types has obvious curved characteristics.

[0097] Step S94: Based on the correlation between the average daily gas production of gas wells of different water production types and the open flow rate of gas test, regression processing is performed to establish a theoretical production allocation chart for water production wells of different water production types.

[0098] This step targets Figure 10 The correlation between the average daily production and the open flow rate established in the paper is used for regression and then the theoretical chart of water production well allocation is established. Figure 11Shown is based on Figure 10 A theoretical chart for water production well allocation was established.

[0099] In this step, the inventors allocate production to gas wells based on the fact that the open flow rate can reflect the seepage characteristics of the artificial fracture zone of the gas well in the initial stage of production. The absolute open flow rate ratio (for example, 1 / 5) is uncertain for the entire life cycle of the gas well. The inventors found in the process of constructing the chart in the above steps S41 to S44 that the actual reasonable production allocation and the open flow rate conform to the power function law, showing that the production allocation coefficient gradually decreases with the increase of the open flow rate, rather than being a fixed coefficient.

[0100] Step S95: Based on the production allocation and the open flow rate of the test gas in the theoretical production allocation chart of the water-producing well, determine the production allocation coefficients of the gas wells of different water-producing types at different test open flow rates.

[0101] In the specific implementation of this step, the inventors based on Figure 11 The ratio of the medium production and the open-flow rate of the test gas determines the production coefficient corresponding to each open-flow rate value.

[0102] Step S96: forming a production allocation coefficient variation chart based on the production allocation coefficients of gas wells of different water production types at different test open-flow rates and open-flow rates.

[0103] Reference Figure 12 As shown, the production allocation coefficient variation chart of different water-producing types of gas wells at different test gas open flow rates is constructed. The inventor can see from the three-year average daily gas production and open flow rate distribution pattern chart of different types of water-producing wells that the open flow rate of gas wells put into production in tight sandstone gas reservoirs is mainly distributed below 100,000 cubic meters. From the production allocation coefficient variation chart, it can be seen that when the open flow rate is greater than 100,000 cubic meters, the production allocation coefficient of the gas well tends to a stable value. Therefore, for different types of gas wells, the production allocation coefficient with an open flow rate between 0 and 100,000 cubic meters is mainly analyzed. From the production allocation coefficient variation chart, it can be seen that the production allocation ratios for open flow rates less than 40,000 cubic meters, 40,000-100,000 cubic meters, and greater than 100,000 cubic meters are quite different, so the open flow rate limit values ​​are set to 40,000 cubic meters and 100,000 cubic meters.

[0104] In another optional embodiment, the above-mentioned method for constructing the production allocation coefficient change chart may further include the following steps:

[0105] Step S97: Based on the production allocation coefficient change trend in the production allocation coefficient change chart, determine the open flow rate change interval threshold of gas wells with different water production types, so as to construct a reasonable production allocation table for gas wells with different water production types in different open flow rate change intervals.

[0106] In this step, the inventors combined the production allocation coefficient variation chart to generate an optimized production allocation table for different types of water-producing wells. The production allocation coefficient variation chart shows that different types of water-producing wells have different production allocations, so when guiding the production allocation of different water-producing wells, appropriate adjustments to the ratio are necessary. This table allows for rapid query of reasonable production allocation data for different types of gas wells in different open flow ranges. While this table reduces accuracy compared to the production allocation coefficient variation chart, it significantly improves efficiency.

[0107] The production allocation for different types of water-producing wells was optimized based on the production allocation coefficient variation chart. The production allocation ratio for water-bearing tight gas reservoirs is shown in the following table (Table 1). This optimized production allocation table for different types of water-producing wells can guide the production allocation of different types of water-producing wells in water-bearing tight gas reservoirs.

[0108] Table 1 Optimized production allocation for different types of water-producing wells

[0109]

[0110] In another optional embodiment, the method for developing high-quality reserve areas of the water-bearing tight gas reservoir may further include the following steps:

[0111] Step S17: Design corresponding drainage and gas production plans for the gas wells deployed in the high-quality reserve areas, so as to develop the water-bearing tight gas reservoirs in combination with a reasonable production ratio of the gas wells.

[0112] During the specific implementation of this step, first, based on the energy storage coefficient, the open flow rate of test gas and the water-gas ratio of the water-bearing tight gas reservoir, the high-quality reserve areas are divided to obtain different types of gas reservoir areas; wherein the energy storage coefficient is determined based on the effective thickness, porosity and gas saturation of the reservoir; then, based on the different types of gas reservoir areas and the production methods of the gas wells arranged thereon, the drainage and gas production schemes of the gas wells are designed to realize the development of the water-bearing tight gas reservoir; wherein the different types of gas reservoir areas include: Class I areas, Class II areas and Class III areas, Class I areas are reservoir areas where the energy storage coefficient and the open flow rate of test gas are both greater than the preset threshold value and the water-gas ratio is less than the preset threshold value; Class II areas are areas between Class I areas and Class III areas; Class III areas are reservoir areas where the energy storage coefficient and the open flow rate of test gas are both less than the preset threshold value and the water-gas ratio is greater than the preset threshold value; the production methods of gas wells include: single-layer gas layer production and multi-layer gas layer combined production.

[0113] That is, based on the analysis of gas-water distribution patterns and the identification of water production in the producing layers, relatively high-quality reserve areas can be identified. Using the energy storage coefficient, open-gas flow rate, and water-to-gas ratio of production wells as core indicators, water-bearing gas reservoirs are divided into three types of reserve areas (three types of areas): favorable I zone (Type I area), favorable II zone (Type II area), and water-rich zone. The energy storage coefficient (F) = effective thickness (h) × porosity (Φ) × gas saturation (Sg). It is a good parameter for selecting enriched blocks and predicting gas well productivity. It reflects the gas enrichment of the reservoir and has a high correlation with productivity. A higher energy storage coefficient indicates higher single-well test gas production. The open-gas flow rate directly reflects the production capacity of the gas well. Statistical results show that in the study of water-bearing gas reservoirs, the water-to-gas ratio of production wells is an important indicator for screening water-bearing gas wells. Areas with a water-to-gas ratio ≥ 1 cubic meter per 10,000 cubic meters are considered water-rich areas and require water-avoidance development during production deployment. Table 2 below shows the different types of water-bearing gas reservoir reserve areas classified by this step.

[0114] Table 2 Classification of water-bearing gas reservoir reserves

[0115]

[0116] In the above steps, the design of the drainage and gas production plan for the gas well includes:

[0117] If the gas well is located in a Class I area, and the thickness of a single gas layer in the gas-bearing reservoir in the Class I area is greater than 5m or the thickness of a combined gas layer is greater than 8m, throttling production is performed in the initial stage of gas production, and auxiliary plunger and / or bubble drainage measures are adopted in the later stage; if the gas well is located in a Class II or Class III area, a plunger device is directly used in the completion stage; if the liquid accumulation is serious, a combined drainage and gas production measure of gas lift + bubble drainage / gas lift + plunger is adopted.

[0118] Gas wells in water-bearing reservoirs are characterized by low single-well production, rapid decline rates, and widespread liquid accumulation. To address these challenges, years of research and testing have resulted in a series of drainage and gas recovery technologies, primarily foam drainage, velocity string, and plunger gas lift. However, through continuous practice and understanding, these three core technologies have varying degrees of technical effectiveness and economic applicability at different stages, with distinct advantages and disadvantages:

[0119] (1) Foam drainage is suitable for daily gas production of 0.5×10 4 m 3 / d or more liquid accumulation gas wells, this measure is highly effective, as the higher the production, the more obvious the effect, and the process is simple, the one-time cost is low, and the effect is fast; however, the cumulative cost is high, the injection workload is large, and defoaming and water treatment are required. (2) The velocity string is effective for Class I gas wells with strong stable production capabilities in the low-production stage, with a long effective period, continuous gas and water production, and low management workload; but for Class I gas wells with a daily gas production of 0.3×10 4 m 3 / d below the gas well, there is no obvious effect, and the one-time cost is high and the production is low, so other measures need to be combined. (3) Plunger gas lift is effective in all production stages of gas wells, and the production lower limit is 1000m 3 / d, water-gas ratio ≤ 2m 3 / 10 4 m 3 , with a high degree of automation and strong adaptability to low-yield areas, but with high maintenance costs and the need to adjust the operating system in a timely manner.

[0120] Therefore, combining the applicable boundary of technology with scientific supporting process measures is of great significance to the efficient development of gas fields. The embodiment of the present invention combines the advantages and disadvantages of the main technology, takes the maximum output-input ratio of the whole life cycle of the gas well as the goal, and believes that in the early stage of liquid accumulation in gas wells of water-bearing gas reservoirs, the main drainage and gas production measures should be selected according to the type of gas well. In the later stage, when the liquid cannot be completely carried, composite measures are adopted to improve the liquid carrying capacity: (1) Class I wells select 2 3 / 8″ tubing is recommended for throttling production in the early stage of well completion, and auxiliary plunger and / or bubble drainage measures are used in the later stage; (2) 2″ continuous gas production tubing is recommended for completion of Class II and Class III wells, and a plunger device is directly used during the completion stage; (3) For wells with severe liquid accumulation, combined drainage and gas production measures such as gas lift + bubble drainage or gas lift + plunger are recommended (Table 3).

[0121] Table 3 Main drainage and gas production technology policy

[0122]

[0123] This step fully combines reservoir geological characteristics and production dynamic data to establish gas-water layer identification and drainage and gas production technical policies to form a set of water-bearing tight gas reservoir development methods. It solves the technical problems in the existing technology that due to poor connectivity between reservoir water bodies, complex gas-water relationships, widespread water production and wellbore liquid accumulation during the production of gas wells, and the dynamic reserves and production capacity of single wells are far below the average level of gas fields, resulting in temporary difficulty in effectively mobilizing a large amount of geological reserves. It increases the reserve utilization of water-bearing tight gas reservoirs and achieves effective development.

[0124] Based on the same inventive concept, the present invention also provides a development device for high-quality reserves of water-bearing tight gas reservoirs. Figure 13 As shown, the device may include: a comparison and judgment module 131, a water layer identification module 132, a water layer correction module 133, a well connection analysis module 134, a sweet spot determination module 135 and a production allocation ratio determination module 136. Its working principle is as follows:

[0125] The comparison and judgment module 131 is used to compare the gas test data and / or production data of the gas well with the pre-built water-producing gas well identification chart to determine the water production type of the gas well; the water production types of the gas well include: low water production type gas well, medium-high water production type gas well and atmospheric water type gas well;

[0126] The water layer identification module 132 is used to construct an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the water-bearing layer of the gas well;

[0127] The water layer correction module 133 is used to correct the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate;

[0128] The well connection analysis module 134 is used to perform well connection profile analysis on the gas wells based on the corrected aquifer to obtain the aquifer distribution of the water-bearing tight gas reservoir;

[0129] The sweet spot determination module 135 is used to determine the high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir;

[0130] The production allocation ratio determination module 136 is used to determine the reasonable production allocation ratio of gas wells deployed in high-quality reserve areas based on the test open-flow rate of gas and the pre-constructed production allocation coefficient change chart corresponding to gas wells of different water production types, so as to realize the development of water-bearing tight gas reservoirs.

[0131] In an alternative embodiment, referring to Figure 13 As shown, the device may further include: a water-gas identification chart construction module 137, which is used to: obtain gas test data and / or production data of a preset number of gas wells in the area where the water-bearing tight gas reservoir is located or in similar areas;

[0132] Based on the comparison results of the open flow rate value, water-gas ratio, and casing pressure change value included in the gas test data and / or production data of the gas well with the preset threshold value, the water production type of the gas well is classified; wherein the water production type of the gas well includes: low water production type gas well, medium-high water production type gas well, and atmospheric water production type gas well;

[0133] Based on the gas test data and / or production data of different types of gas wells, a water-producing gas well identification chart for different types of gas wells is constructed.

[0134] In another alternative embodiment, referring to Figure 13 As shown, the device may further include: a production allocation coefficient change chart construction module 138, the production allocation coefficient change chart construction module 138 is used to: obtain the gas test open flow rate and the average gas production in the initial stage of production of several gas wells;

[0135] Based on the water-gas ratio of the gas wells and the preset water-gas ratio threshold, the water production types of several gas wells are divided to construct the average daily gas production and test open-flow rate distribution maps of gas wells with different water production types;

[0136] Based on the correlation between the average daily gas production of the gas wells of different water production types and the open flow rate of the gas test, regression processing is performed to establish a theoretical production allocation chart for the water production wells of the gas wells of different water production types;

[0137] Based on the production allocation and test gas open flow rate in the water production well production allocation theoretical chart, determine the production allocation coefficients of gas wells of different water production types at different test gas open flow rates;

[0138] The production allocation coefficient variation chart is formed based on the production allocation coefficients of gas wells of different water production types at different test open-flow rates, and the open-flow rates.

[0139] In another optional embodiment, the production allocation coefficient change chart construction module 138 is further used to:

[0140] Based on the production allocation coefficient change trend in the production allocation coefficient change chart, the open flow rate change interval threshold of gas wells with different water production types is determined to construct a reasonable production allocation table for gas wells with different water production types in different open flow rate change intervals.

[0141] In another alternative embodiment, referring to Figure 13 As shown, the device may also include: a drainage and gas production design module 139, which is used to design corresponding drainage and gas production plans for the gas wells deployed in the high-quality reserve area, so as to develop the water-containing tight gas reservoir in combination with the reasonable production ratio of the gas wells.

[0142] In another optional embodiment, the drainage and gas production design module 139 is specifically configured to:

[0143] Based on the energy storage coefficient, open flow rate of gas test, and water-gas ratio of the water-bearing tight gas reservoir, the high-quality reserve area is divided to obtain different types of gas reservoir areas; wherein the energy storage coefficient is determined based on the effective thickness, porosity, and gas saturation of the reservoir;

[0144] Based on different types of gas reservoir areas and the production methods of gas wells deployed therein, design a drainage and gas production plan for the gas wells to achieve the development of the water-bearing tight gas reservoirs;

[0145] Among them, different types of gas reservoir areas include: Class I areas, Class II areas and Class III areas. Class I areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both greater than a preset threshold, and the water-gas ratio is less than a preset threshold; Class II areas are areas between Class I areas and Class III areas; Class III areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both less than a preset threshold, and the water-gas ratio is greater than a preset threshold;

[0146] The production methods of the gas well include: single-layer gas layer production and multi-layer gas layer combined production.

[0147] In another optional embodiment, the drainage and gas production design module 139 is further configured to:

[0148] If the gas well is located in a Class I area, and the thickness of a single gas layer in the gas-bearing reservoir in the Class I area is greater than 5 m or the thickness of a combined gas layer is greater than 8 m, throttling production is performed in the initial stage of gas production, and auxiliary plunger and / or foam drainage measures are adopted in the later stage;

[0149] If the gas well is located in a Class II or Class III area, a plunger device will be directly used during the completion phase. If the liquid accumulation is severe, a combined drainage and gas recovery measure of gas lift + bubble drainage / gas lift + plunger will be adopted.

[0150] Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for developing high-quality reserve areas of water-bearing tight gas reservoirs is implemented.

[0151] Based on the same inventive concept, an embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, the development method of the high-quality reserve area of ​​the water-containing tight gas reservoir is implemented.

[0152] The principles of the problems solved by the above-mentioned devices, media, and related equipment in the embodiments of the present invention are similar to those of the above-mentioned methods. Therefore, their implementation can refer to the implementation of the above-mentioned methods, and the repeated parts will not be repeated.

[0153] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0154] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0155] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0156] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0157] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for developing high-quality reserves of water-bearing tight gas reservoirs, characterized in that: include: Comparing the gas test data and / or production data of the gas well with a pre-built water-producing gas well identification chart to determine the water production type of the gas well; The water production types of the gas wells include: low water production type gas wells, medium to high water production type gas wells and atmospheric water type gas wells; constructing an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the aquifer of the gas well; Correcting the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate; Performing a well-connected profile analysis on the gas well based on the corrected aquifer to obtain the aquifer distribution of the water-bearing tight gas reservoir; determining a high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir; Based on the open-flow rate of the gas test and the pre-constructed production allocation coefficient change chart corresponding to gas wells of different water production types, the reasonable production allocation ratio of the gas wells deployed in the high-quality reserve area is determined to realize the development of the water-bearing tight gas reservoir.

2. The method according to claim 1, characterized in that The water-producing gas well identification chart is pre-constructed according to the following method: Obtaining gas test data and / or production data of a preset number of gas wells in the area where the water-bearing tight gas reservoir is located or in similar areas; Based on the comparison result of the open flow value, water-gas ratio or casing pressure change value included in the gas test data and / or production data of the gas well and the preset threshold value, the water production type of the gas well is classified; wherein the water production type of the gas well includes: low water production type gas well, medium-high water production type gas well and atmospheric water type gas well; Based on the gas test data and / or production data of different types of gas wells, a water-producing gas well identification chart for different types of gas wells is constructed.

3. The method according to claim 1, characterized in that The production allocation coefficient change chart corresponding to gas wells of different water production types is pre-constructed by the following method: Obtain the open-gas flow rate of several gas wells and the average gas production in the initial stage of production; Based on the water-gas ratio of the gas wells and the preset water-gas ratio threshold, the water production types of several gas wells are divided to construct the average daily gas production and test open-flow rate distribution maps of gas wells with different water production types; Based on the correlation between the average daily gas production of the gas wells of different water production types and the open flow rate of the gas test, regression processing is performed to establish a theoretical production allocation chart for the water production wells of the gas wells of different water production types; Based on the production allocation and test gas open flow rate in the water production well production allocation theoretical chart, determine the production allocation coefficients of gas wells of different water production types at different test gas open flow rates; The production allocation coefficient variation chart is formed based on the production allocation coefficients of gas wells of different water production types at different test open-flow rates, and the open-flow rates.

4. The method according to claim 3, characterized in that Also includes: Based on the production allocation coefficient change trend in the production allocation coefficient change chart, the open flow rate change interval threshold of gas wells with different water production types is determined to construct a reasonable production allocation table for gas wells with different water production types in different open flow rate change intervals.

5. The method according to any one of claims 1 to 4, characterized in that Also includes: A corresponding drainage and gas production plan is designed for the gas wells deployed in the high-quality reserve area, so as to develop the water-bearing tight gas reservoir in combination with a reasonable production ratio of the gas wells.

6. The method according to claim 5, characterized in that The corresponding drainage and gas production scheme designed for the gas well includes: Based on the energy storage coefficient, open flow rate of gas test, and water-gas ratio of the water-bearing tight gas reservoir, the high-quality reserve area is divided to obtain different types of gas reservoir areas; wherein the energy storage coefficient is determined based on the effective thickness, porosity, and gas saturation of the reservoir; Based on different types of gas reservoir areas and the production methods of gas wells deployed therein, design a drainage and gas production plan for the gas wells to achieve the development of the water-bearing tight gas reservoirs; Among them, different types of gas reservoir areas include: Class I areas, Class II areas and Class III areas. Class I areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both greater than a preset threshold, and the water-gas ratio is less than a preset threshold; Class II areas are areas between Class I areas and Class III areas; Class III areas are reservoir areas where the energy storage coefficient and the open flow rate of gas test are both less than a preset threshold, and the water-gas ratio is greater than a preset threshold; The production methods of the gas well include: single-layer gas layer production and multi-layer gas layer combined production.

7. The method according to claim 6, characterized in that The drainage and gas production plan for the designed gas well includes: If the gas well is located in a Class I area, and the thickness of a single gas layer in the gas-bearing reservoir in the Class I area is greater than 5 m or the thickness of a combined gas layer is greater than 8 m, throttling production is performed in the initial stage of gas production, and auxiliary plunger and / or foam drainage measures are adopted in the later stage; If the gas well is located in a Class II or Class III area, a plunger device will be directly used during the completion phase. If the liquid accumulation is severe, a combined drainage and gas recovery measure of gas lift + bubble drainage / gas lift + plunger will be adopted.

8. A development device for high-quality reserves of water-bearing tight gas reservoirs, characterized in that: include: A comparison and judgment module is used to compare the gas test data and / or production data of the gas well with a pre-built water-producing gas well identification chart to determine the water production type of the gas well; The water production types of the gas wells include: low water production type gas wells, medium to high water production type gas wells and atmospheric water type gas wells; a water layer identification module, configured to construct an acoustic transit time-resistivity intersection diagram based on the acoustic transit time logging curve and the resistivity logging curve of the gas well to identify the water-bearing layer of the gas well; a water layer correction module, configured to correct the water-bearing layer in the gas well based on the water production type of the gas well identified by the water-producing gas well identification plate; a well connection analysis module, configured to perform a well connection profile analysis on the gas well based on the corrected aquifer to obtain the aquifer distribution of the water-bearing tight gas reservoir; a sweet spot determination module, configured to determine a high-quality reserve area of ​​the water-bearing tight gas reservoir based on the aquifer distribution and the gas reservoir distribution in the water-bearing tight gas reservoir; The production allocation ratio determination module is used to determine the reasonable production allocation ratio of the gas wells deployed in the high-quality reserve area based on the test open-flow rate of gas and the pre-constructed production allocation coefficient change chart corresponding to gas wells of different water production types, so as to realize the development of the water-bearing tight gas reservoir.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for developing a high-quality reserve area of ​​a water-bearing tight gas reservoir according to any one of claims 1 to 7 is implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for developing a high-quality reserve area in a water-bearing tight gas reservoir according to any one of claims 1 to 7 is implemented.

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