Method, device, equipment and storage medium for determining production potential of coalbed methane well

Abstract

The present application is about a method, device, equipment and storage medium for determining the production potential of a coalbed methane well, and relates to the field of petrochemical technology. The method includes: obtaining resource basic data of the target development unit; if the resource basic data of the target development unit meets the first condition, obtaining the fault data corresponding to the target coalbed methane well, and the water production of the target coalbed methane well is greater than the specified water production threshold; calculating the gas content of the target coalbed methane well based on the fault data; if its gas content reaches the first gas content threshold, obtaining the single-well water supply of the target coalbed methane well, if the single-well water supply meets the second condition, determining that the target coalbed methane well has production potential. Through the above method, in the process of determining the production potential of the coalbed methane well, the resource basic data of the area where the coalbed methane high-yield water well is located, the gas content of the single well and the water supply situation on the production of the coalbed methane high-yield water well are comprehensively considered, so as to achieve efficient judgment of the gas production potential of the coalbed methane high-yield water well.

Description

Technical Field

[0001] The present application relates to the field of petrochemical technology, and in particular to a method, device, equipment and storage medium for determining the production potential of a coalbed methane well. Background Art

[0002] Coalbed methane is a self-generated and self-stored unconventional natural gas found in coal seams. It is a new type of clean energy and high-quality chemical raw material. The conditions of high-yield coalbed methane wells are complex, and it is difficult to predict the water production. If the current equipment is insufficient to meet the production needs of high-yield coalbed methane wells, it is necessary to treat the high-yield coalbed methane wells. Before treating the high-yield coalbed methane wells, it is necessary to analyze the production potential of the high-yield coalbed methane wells to avoid the waste of mining resources caused by the high-yield wells not producing gas or producing low gas.

[0003] In related technologies, the production potential of coalbed methane wells is usually analyzed by chemical analysis of the produced water from a single well to qualitatively determine the source of the produced water, and by determining the resource potential based on the desorption pressure. The two are combined to determine whether the coalbed methane well has production potential.

[0004] However, the above method is difficult to judge the production potential of undesorbed coalbed methane wells, and it is difficult to determine the source and replenishment of produced water, so it is of low practicality. Summary of the invention

[0005] This application is about a method, device, equipment and storage medium for determining the production potential of coalbed methane wells, which can realize rapid and effective judgment and evaluation of the production potential of high-yield coalbed methane wells. The technical solution is as follows:

[0006] In one aspect, a method for determining production potential of a coalbed methane well is provided, the method comprising:

[0007] Obtain resource basic data of a target development unit; the target development unit is a development unit where a target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold;

[0008] In response to the resource basic data of the target development unit meeting a first condition, acquiring fault data of a fault corresponding to the target coalbed methane well;

[0009] Calculating the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well;

[0010] In response to the gas content of the target coalbed methane well reaching a first gas content threshold, obtaining a single-well water source recharge amount of the target coalbed methane well;

[0011] In response to the single-well water supply volume of the target coalbed methane well satisfying the second condition, it is determined that the target coalbed methane well has production potential.

[0012] In a possible implementation, the resource basic data of the target development unit includes: the gas content of the target development unit, the coal seam thickness of the target development unit, and the coal seam depth of the target development unit;

[0013] The acquiring of the resource basic data of the target development unit comprises:

[0014] The gas content of the target development unit, the thickness of the coal seam of the target development unit, and the buried depth of the coal seam of the target development unit are obtained.

[0015] In a possible implementation, the target development unit includes at least one developed coalbed methane well;

[0016] The obtaining of the gas content of the target development unit, the thickness of the coal seam of the target development unit, and the buried depth of the coal seam of the target development unit includes:

[0017] Obtain the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well;

[0018] Based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well, the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam burial depth of the target development unit are calculated.

[0019] In a possible implementation, the first condition includes: the gas content of the development unit is greater than a second gas content threshold, the coal seam thickness of the development unit is greater than a first distance threshold, and the coal seam burial depth of the development unit is less than a second distance threshold.

[0020] In a possible implementation, the obtaining of fault data of the fault corresponding to the target coalbed methane well includes:

[0021] Obtaining the stratigraphic fault distance of the fault corresponding to the target coalbed methane well;

[0022] And, obtaining the distance between the fault corresponding to the target coalbed methane well and the target coalbed methane well.

[0023] In a possible implementation, obtaining the single-well water supply amount of the target coalbed methane well includes:

[0024] Obtaining the water source of the replenishment water; the water source is used to indicate the aquifer where the target water source is located; the target water source refers to the water source of the replenishment water corresponding to the target coalbed methane well;

[0025] Obtaining the connectivity status between the hydraulic fractures of the target coalbed methane well and the target water source;

[0026] The single-well water supply volume of the target coalbed methane well is determined according to the water production source and the connectivity status.

[0027] In a possible implementation, the water source for obtaining the replenishment water includes:

[0028] Obtaining sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well;

[0029] The produced water source of the makeup water is determined based on the sulfate ion concentration and the calcium ion concentration.

[0030] In a possible implementation, the obtaining the connectivity status between the hydraulic fracture of the target coalbed methane well and the target water source includes:

[0031] Obtaining a single well fracturing construction curve of the target coalbed methane well;

[0032] Based on the single well fracturing construction curve, the connectivity status between the fracturing crack and the target water source is obtained.

[0033] In another aspect, a device for determining production potential of a coalbed methane well is provided, the device comprising:

[0034] A resource basic data acquisition module is used to acquire resource basic data of a target development unit; the target development unit is a development unit where a target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold;

[0035] A fault data acquisition module, configured to acquire fault data of a fault corresponding to the target coalbed methane well in response to the resource basic data of the target development unit meeting a first condition;

[0036] A gas content calculation module, used to calculate the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well;

[0037] A single-well water supply acquisition module, configured to acquire the single-well water supply of the target coal-bed methane well in response to the gas content of the target coal-bed methane well reaching a first gas content threshold;

[0038] The production potential determination module is used to determine that the target coalbed methane has production potential in response to the single-well water supply of the target coalbed methane well satisfying the second condition.

[0039] In a possible implementation, the resource basic data of the target development unit includes: the gas content of the target development unit, the coal seam thickness of the target development unit, and the coal seam depth of the target development unit;

[0040] The resource basic data acquisition module is used to obtain the gas content of the target development unit, the coal seam thickness of the target development unit, and the buried depth of the coal seam of the target development unit.

[0041] In a possible implementation, the target development unit includes at least one developed coalbed methane well;

[0042] The resource basic data acquisition module includes:

[0043] A coalbed methane well resource basic data acquisition submodule is used to obtain the gas content, coal seam thickness and coal seam burial depth of at least one developed coalbed methane well;

[0044] The development unit resource basic data acquisition submodule is used to calculate the gas content of the target development unit, the coal seam thickness of the target development unit, and the coal seam burial depth of the target development unit based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coalbed methane well.

[0045] In a possible implementation, the first condition includes: the gas content of the development unit is greater than a second gas content threshold, the coal seam thickness of the development unit is greater than a first distance threshold, and the coal seam burial depth of the development unit is less than a second distance threshold.

[0046] In a possible implementation, the tomographic data acquisition module includes:

[0047] A formation fault distance acquisition submodule, used to acquire the formation fault distance of the fault corresponding to the target coalbed methane well;

[0048] And, the interval distance acquisition submodule is used to obtain the distance between the fault corresponding to the target coalbed methane well and the target coalbed methane well.

[0049] In a possible implementation, the single well water supply acquisition module includes:

[0050] The water source acquisition submodule is used to obtain the water source of the replenishment water; the water source is used to indicate the aquifer where the target water source is located; the target water source refers to the water source of the replenishment water corresponding to the target coalbed methane well;

[0051] A connection status acquisition submodule, used to acquire the connection status between the hydraulic fracture of the target coalbed methane well and the target water source;

[0052] The single-well water source supply quantity determination submodule is used to determine the single-well water source supply quantity of the target coalbed methane well according to the water production source and the connectivity status.

[0053] In a possible implementation, the water source acquisition submodule includes:

[0054] An ion concentration acquisition unit, used to acquire the sulfate ion concentration and the calcium ion concentration of the water source corresponding to the target coalbed methane well;

[0055] A produced water source acquisition unit is used to determine the produced water source of the makeup water based on the sulfate ion concentration and the calcium ion concentration.

[0056] In a possible implementation, the connectivity status acquisition submodule includes:

[0057] A single well fracturing construction curve acquisition unit, used to acquire the single well fracturing construction curve of the target coalbed methane well;

[0058] A connection state acquisition unit is used to acquire the connection state between the fracturing crack and the target water source based on the single well fracturing construction curve.

[0059] On the other hand, a computer device is provided, which includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for determining the production potential of a coalbed methane well provided in an embodiment of the present application.

[0060] On the other hand, a computer-readable storage medium is provided, in which at least one instruction, at least one program, code set or instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the method for determining the production potential of a coalbed methane well provided in the above-mentioned embodiment of the present application.

[0061] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method for determining the production potential of a coalbed methane well provided in the above-mentioned various optional implementations.

[0062] The beneficial effects of the technical solution provided by this application include at least:

[0063] Through the preliminary evaluation of the development unit where the high-yield coalbed methane water well to be treated is located, the production potential of the high-yield coalbed methane water well to be treated is preliminarily judged. After determining that the development unit where the high-yield coalbed methane water well to be treated meets certain conditions, the difficulty and necessity of mining are further determined according to the gas content and water supply of the high-yield coalbed methane water well. In the process of determining the production potential of the high-yield coalbed methane water well, by comprehensively considering the basic resource data of the area where the high-yield coalbed methane water well is located, the gas content of a single well and the water supply situation on the production of the high-yield coalbed methane water well, an efficient judgment of the gas production potential of the high-yield coalbed methane water well can be achieved, and then the potential high-yield coalbed methane water wells can be treated in a targeted manner to increase the gas production of a single well. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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.

[0065] Figure 1 A flow chart of a method for determining production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown;

[0066] Figure 2 A flow chart of a method for determining production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown;

[0067] Figure 3 A schematic diagram of a fault distance shown in an exemplary embodiment of the present application is shown;

[0068] Figure 4 A scatter plot showing the relationship between sulfate ions and calcium ions shown in an exemplary embodiment of the present application;

[0069] Figure 5 A flow chart of a method for determining production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown;

[0070] Figure 6 A block diagram of a device for determining production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown;

[0071] Figure 7 It is a structural block diagram of a computer device according to an exemplary embodiment. DETAILED DESCRIPTION

[0072] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0073] First, a brief introduction is given to the terms involved in the embodiments of the present application:

[0074] 1) Coalbed Gas

[0075] Coalbed methane refers to self-generated and self-stored unconventional natural gas with methane as the main component that exists in coal seams. It mainly exists in the form of adsorption on the surface of coal matrix particles (adsorption state), and some of it is free in the coal pores (free state) or dissolved in the coal seam water (dissolved state). It is a mineral resource associated with coal and is often referred to as coalbed methane.

[0076] Among them, the free state means that the coalbed methane exists in the coal cleat cracks and other fracture pores in the state of free gas and can move freely. The driving force for the movement of coalbed methane in the free state is the pressure difference.

[0077] Adsorption state means that most of the coalbed methane is stored in the adsorption state on the inner surface of the coal matrix pores. Under certain conditions, the adsorbed gas molecules can be separated from the inner surface of the coal (desorbed) and enter a free state.

[0078] The dissolved state refers to the natural gas in the coal being stored in the groundwater in a dissolved state, called dissolved gas, and the amount is relatively small.

[0079] There are two basic types of coalbed methane genesis: biogenic and thermal.

[0080] Among them, biogenic gas is formed by the degradation of organic matter caused by a series of complex processes of various microorganisms; while thermogenic gas refers to hydrocarbon gas formed as coalification proceeds, accompanied by temperature rise, changes in the molecular structure and composition of coal. Biogenic gas can be formed in the early stage of coalification (peat-lignite) and the tectonic uplift stage after the formation of coal seams, so it can be divided into early (primary) biogenic gas and late (secondary) biogenic gas.

[0081] 2) Fault

[0082] Fault refers to a structural phenomenon in which the crustal rock strata are broken due to a certain strength of force, and there is a significant relative movement along the fracture surface. Faults are widely developed structural forms in tectonic movements. They vary in size and scale, but all of them destroy the continuity and integrity of the rock strata. Rocks on fault zones are often broken and easily weathered and eroded.

[0083] 3) Fracturing construction curve

[0084] Hydraulic fracturing is an important measure to increase the production of oil and gas wells. When the surface high-pressure pump group injects high-viscosity liquid into the well at a displacement exceeding the absorption capacity of the bottom layer, the force generated at the bottom of the well exceeds the ground stress near the well wall and the rock tensile strength, and cracks are formed in the formation. As the liquid with proppant is injected into the bottom layer, the cracks gradually extend forward to form sand-filled cracks with a certain length, width and height. These cracks have high conductivity, which changes the flow pattern of oil and gas seepage, changing from the original radial flow to a unidirectional flow from the formation into the cracks, and then from the cracks into the wellbore, greatly increasing the production of oil and gas wells.

[0085] The fracturing operation curve refers to the relationship curve between the pumping pressure, sand concentration curve and operation displacement recorded on the ground and the time during the fracturing process. The change of bottom hole pressure over time during the construction process reflects the extension and development of the cracks to a certain extent. The operation curve analysis is an important tool for construction status diagnosis and post-fracturing effect evaluation, which directly affects the design of fracturing construction and the success or failure of fracturing.

[0086] There are typical characteristics in the fracturing construction curve. The curve characteristics in the fracturing construction curve can be used to estimate the parameters in the fracturing design such as the ground rupture pressure, crack extension pressure and friction resistance in the wellbore, and further estimate the size of the ground pressure and judge the formation conditions.

[0087] The fracturing operation curve can indirectly predict the fracturing effect: if the fracturing curve is displayed by multiple fractures, it means that the formation may be unblocked or multiple fractures may be opened, which greatly improves the formation permeability, reduces the oil and gas seepage resistance, and increases the formation production. Under the same fracturing fluid and the same displacement, the pressure drops by when adding sand, indicating that the formation fractures are well formed, the sand-carrying fluid has little resistance to movement in the fractures, and the formation often has good fluid production capacity after transformation, and the increase in production is large.

[0088] The production process of coalbed methane includes: drainage and pressure reduction, desorption and diffusion, and seepage production. That is, in the process of coalbed methane production, the coalbed methane well needs to be drained to reduce the reservoir pressure to below the desorption pressure so that the coalbed methane can be desorbed and produced. Taking the coal reservoir of Qinnan coalbed methane field as an example, the coal reservoir of Qinnan coalbed methane field is a low-porosity and low-permeability reservoir with a porosity of generally 5% to 15%, a permeability of generally 0.01 to 5mD (millidarcy), and a low water content. The drainage data show that the stable water production of a single well is generally less than 5 cubic meters per day; the water production of wells distributed near faults or fold turning sections is usually large, and its daily water production can reach more than 20 cubic meters per day, and the maximum is 200 cubic meters per day. The geological conditions of such high-yield water wells are complex, and it is difficult to predict the water production. The drainage capacity of their drainage equipment is often lower than the water production capacity of the formation, resulting in that although a long drainage period has been experienced during the production process, the reservoir pressure cannot be reduced to below the desorption pressure, or although it has dropped to below the desorption pressure, it cannot be further continuously reduced, resulting in no gas production or low gas production in such wells, and poor development effect. Therefore, when judging the production potential of high-yield coalbed methane water wells, on the one hand, it is necessary to consider the gas content of the high-yield coalbed methane water wells, and on the other hand, it is necessary to consider the difficulty of treating the high-yield coalbed methane water wells, which is mainly reflected in the difficulty of draining the high-yield coalbed methane water wells.

[0089] Figure 1 A flowchart of a method for determining the production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown. The method can be executed by a computer device, such as Figure 1 As shown, the method for determining the production potential of a coalbed methane well includes:

[0090] Step 110, obtaining resource basic data of a target development unit; the target development unit is a development unit where a target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold.

[0091] That is to say, when the water production of a coalbed methane well is greater than the specified water production threshold, the coalbed methane well is identified as a high-yield coalbed methane well to be treated, i.e., a target coalbed methane well. The specified water production threshold can be set based on actual conditions, for example, it can be set to 15 cubic meters / day or 20 cubic meters / day, etc.

[0092] In a possible implementation, the development unit is a geographical area divided based on actual geographical conditions, and each development unit contains at least one coalbed methane well.

[0093] In a possible implementation, basic resource data of the target development unit is acquired based on the production data of each coalbed methane well in the target development unit.

[0094] In one possible implementation, the geographical area is divided into different development units based on the gas content of the developed coalbed methane wells in the geographical area, the thickness of the coal seams in different areas, and the burial depth of the coal seams. The area of ​​each development unit may be different, or the number of coalbed methane wells contained in each development unit may also be different. This application does not impose any restrictions on this.

[0095] Step 120, in response to the resource base data of the target development unit meeting the first condition, obtaining fault data of the fault corresponding to the target coalbed methane well.

[0096] In a possible implementation, the fault corresponding to the target coalbed methane well is the fault closest to the target coalbed methane well.

[0097] Since the production location of coalbed methane is highly dependent on the geographical environment, if the resource base data of the target development unit does not meet the first condition, it can be determined that the production potential of the target coalbed methane well is low, and there is no need to perform the following steps to reduce the waste of human and computing resources caused by meaningless data acquisition operations, while reducing expenses.

[0098] Step 130, calculating the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well.

[0099] The gas content of the target coalbed methane well refers to the volume of gas contained in unit mass of coal under standard conditions, and its unit is cm 3 / g.

[0100] Step 140, in response to the gas content of the target coalbed methane well reaching a first gas content threshold, obtaining the single-well water source replenishment of the target coalbed methane well.

[0101] In one possible implementation, the amount of water supply to a single coalbed methane well is related to the difficulty of draining the target coalbed methane well. If the amount of water supply to a single coalbed methane well is too large, the reservoir pressure cannot be reduced to below the desorption pressure even after a long drainage period, or although it is reduced to below the desorption pressure, it cannot be further continuously reduced. Therefore, if the amount of water supply to a single well of the target coalbed methane well is too large, even if the gas content of the target coalbed methane well reaches the first gas content threshold, the target coalbed methane well will be determined to have no production potential due to the excessive difficulty in starting production.

[0102] Step 150, in response to the single-well water supply of the target coalbed methane well satisfying the second condition, determining that the target coalbed methane well has production potential.

[0103] In a possible implementation, the second condition refers to that the single-well water source supply is less than the supply threshold, or the single-well water source supply is at a specified level. Schematically, the specified level includes high, medium, and low levels. When the single-well water source supply is at a medium or low level, it is determined that the single-well water source supply of the target coalbed methane well meets the second condition; when the single-well water source supply is at a high level, it is determined that the single-well water source supply of the target coalbed methane well does not meet the second condition. In the embodiment of the present application, considering that it is difficult to obtain an accurate value of the single-well water source supply, whether the single-well water source supply of the target coalbed methane well meets the second condition is determined by whether the single-well water source supply is at a specified level.

[0104] To summarize, the method for determining the production potential of a coalbed methane well provided in the embodiment of the present application makes a preliminary judgment on the production potential of the high-yield coalbed methane water well to be treated by preliminarily evaluating the development unit in which the high-yield coalbed methane water well to be treated is located. After determining that the development unit in which the high-yield coalbed methane water well to be treated is located meets certain conditions, the difficulty and necessity of mining are further determined according to the gas content and water supply of the high-yield coalbed methane water well. In the process of determining the production potential of the high-yield coalbed methane water well, by comprehensively considering the resource basic data of the area where the high-yield coalbed methane water well is located, the gas content of a single well and the water supply situation on the production of the high-yield coalbed methane water well, an efficient judgment on the gas production potential of the high-yield coalbed methane water well can be achieved, so that the high-yield water well with potential can be treated in a targeted manner to increase the gas production of a single well.

[0105] In a possible implementation, the resource basic data of the target development unit includes the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam burial depth of the target development unit. Figure 2 A flow chart of a method for determining the production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown. The method can be executed by a computer device. The method for determining the production potential of a coalbed methane well includes:

[0106] Step 210, obtaining the gas content of the target development unit, the coal seam thickness of the target development unit, and the buried depth of the coal seam of the target development unit.

[0107] The target development unit is a development unit where a target coalbed methane well is located, and the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold.

[0108] In one possible implementation, the target development unit includes at least one developed coalbed methane well.

[0109] In a possible implementation, the above-mentioned acquisition of the gas content, coal seam thickness and coal seam burial depth of the target development unit is implemented as follows:

[0110] Obtain the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well;

[0111] Based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well, the gas content of the target development unit, the coal seam thickness of the target development unit, and the coal seam burial depth of the target development unit are calculated.

[0112] In one possible implementation, based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well, the average gas content, average coal seam thickness and average coal seam burial depth of the developed coal seam methane wells in the target development unit are calculated, and the average gas content, average coal seam thickness and average coal seam burial depth of the developed coal seam methane wells are obtained as the gas content, coal seam thickness and coal seam burial depth of the target development unit.

[0113] In one possible implementation, before calculating the average gas content, average coal seam thickness and average coal seam burial depth of developed coalbed methane wells, the resource basic data corresponding to at least one developed coalbed methane well are preprocessed to remove singular points in the data sets corresponding to the gas content, coal seam thickness and coal seam burial depth of at least one developed coalbed methane well, and calculations are performed based on the preprocessed data to reduce the impact of data errors on the resource basic data of the calculated target development unit.

[0114] Step 220, in response to the gas content of the target development unit being greater than the second gas content threshold, the coal seam thickness of the target development unit being greater than the first distance threshold, and the coal seam depth of the target development unit being less than the second distance threshold, obtain fault data of the fault corresponding to the target coalbed methane well.

[0115] That is to say, in one possible implementation, the first condition includes: the gas content of the development unit is greater than the second gas content threshold, the coal seam thickness of the development unit is greater than the first distance threshold, and the coal seam burial depth of the development unit is less than the second distance threshold.

[0116] The coal seam thickness of the development unit refers to the vertically measured coal seam thickness. For example, the second gas content threshold can be set to 13 cm. 3 / g, the first distance threshold is 3m, the second distance threshold is 900m, if the gas content of the target development unit is greater than 13cm 3 / g, the coal seam thickness of the target development unit is greater than the first distance threshold of 3m, and the coal seam burial depth of the target development unit is less than the second distance threshold of 900m, then the target development unit can be determined as a high-quality resource area, and the coalbed methane well in the target development unit has a certain production potential. The target coalbed methane well in the target development unit is determined as the first candidate potential well.

[0117] It should be noted that the above numerical descriptions of the second gas content threshold, the first distance threshold and the second distance threshold are only for illustration. Different geographical regions correspond to different geographical environments, and the gas content of corresponding coalbed methane wells in different geographical regions is also different. The second gas content threshold, the first distance threshold and the second distance threshold can be set differently based on different geographical regions, and this application does not impose any restrictions on this.

[0118] In a possible implementation, it is determined whether the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well meet a third condition; the third condition includes that the gas content of the coal seam methane well is greater than a second gas content threshold, the coal seam thickness is greater than a first distance threshold and the coal seam burial depth is less than a second distance threshold;

[0119] In response to the number of coalbed methane wells that meet the third condition in the target development unit being greater than the first number threshold, the target development unit is determined to be a high-quality resource area, and the step of acquiring fault data of the fault corresponding to the target coalbed methane well is performed. In a possible implementation, acquiring fault data of the fault corresponding to the target coalbed methane well includes:

[0120] Obtain the stratigraphic distance of the fault corresponding to the target coalbed methane well;

[0121] And, obtain the distance between the fault corresponding to the target coalbed methane well and the target coalbed methane well.

[0122] In a possible implementation, obtaining the stratigraphic distance of the fault corresponding to the target coalbed methane well includes:

[0123] Obtain the vertical formation fault distance and horizontal formation fault distance of the fault corresponding to the target coalbed methane well;

[0124] The stratigraphic distance of the fault corresponding to the target coalbed methane well is calculated based on the vertical stratigraphic fault distance and the horizontal stratigraphic fault distance.

[0125] Among them, the stratigraphic fault distance refers to the vertical distance between the corresponding layers on the two sides of the fault; the vertical stratigraphic fault distance refers to the vertical distance between the corresponding layers on the two sides of the fault; and the horizontal stratigraphic fault distance refers to the horizontal distance between the corresponding layers on the two sides of the fault. Figure 3 FIG. 1 shows a schematic diagram of a fault distance shown in an exemplary embodiment of the present application, such as Figure 3 As shown, the distance between ab is the vertical distance between the corresponding layers on the two fault plates, that is, the vertical formation fault distance; the distance between ac is the horizontal distance between the corresponding layers on the two fault plates, that is, the horizontal formation fault distance, and the distance between ad is the vertical distance between the corresponding layers on the two fault plates, that is, the formation fault distance. The formation fault distance can be calculated based on the vertical formation fault distance and the horizontal formation fault distance combined with the Pythagorean theorem. In the embodiment of the present application, the gas content of the target coalbed methane well is calculated based on the formation fault distance.

[0126] Step 230, calculating the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well.

[0127] In a possible implementation, the gas content of the target coalbed methane well is calculated based on the stratigraphic fault distance of the fault corresponding to the target coalbed methane well and the stratigraphic distance between the target coalbed methane well and the fault corresponding to the target coalbed methane well.

[0128] Illustratively, the present application embodiment provides a calculation formula for calculating the gas content of a target coalbed methane well based on the formation fault distance of the fault corresponding to the target coalbed methane well and the formation distance between the target coalbed methane well and the corresponding fault:

[0129] Q=2.3*ln x+15*e -0.2*y +0.73 (1)

[0130] Where Q represents the gas content of the target coalbed methane well, in cm 3 / g, x represents the distance between the target coalbed methane well and its corresponding fault, in m, and y represents the stratigraphic fault distance of the fault corresponding to the target coalbed methane well.

[0131] It should be noted that the above formula is obtained by fitting the relevant data of developed coalbed methane wells in the area where the target coalbed methane well is located. The coefficients obtained based on the fitting results of the relevant data of coalbed methane wells in different geographical areas may be different, and this application does not impose any restrictions on this.

[0132] Step 240, in response to the gas content of the target coalbed methane well reaching a first gas content threshold, obtaining the single-well water source recharge of the target coalbed methane well.

[0133] In one possible implementation, the first gas content threshold is equal to the second gas content threshold, or the first gas content threshold is not equal to the second gas content threshold, that is, the values ​​of the first gas content threshold and the second gas content threshold can be set according to actual needs, and this application does not limit the values ​​of the first gas content threshold and the second gas content threshold.

[0134] Indicatively, the first gas content threshold is 13 cm 3 / g, when the gas content of the target coalbed methane well calculated based on the above formula is greater than or equal to 13cm 3 / g, the target coalbed methane well is determined as the second candidate potential well, and the step of obtaining the single-well water source recharge volume of the target coalbed methane well is executed.

[0135] In one possible implementation, the water supply of a single well is affected by the water richness of the water source (i.e., the water yield of the aquifer) and the connectivity between the coalbed methane well and the water source. Generally speaking, the stronger the water richness of the water source, the greater the water supply of a single well; the better the communication between the coalbed methane well and the water source, the greater the water supply of a single well. And generally speaking, there is a certain relationship between the water yield of the water source and the geological age of the stratum in which the coal seam is located and the corresponding lithology of the stratum. For example, the water content in the limestone stratum of the Ordovician period is relatively high. When it is determined that the stratum corresponding to the target water source is the Ordovician stratum, and the corresponding lithology of the stratum is limestone, it can be determined that the drainage difficulty of the target coalbed methane well is relatively high, and the production potential of the target coalbed methane well is determined to be relatively low. Therefore, the above process of obtaining the single-well water supply of the target coalbed methane well can be implemented as follows:

[0136] Obtain the water source of the replenishment water; the water source is used to indicate the aquifer where the target water source is located; the target water source refers to the water source of the replenishment water corresponding to the target coalbed methane well;

[0137] Obtaining the connectivity status between the hydraulic fractures of the target coalbed methane well and the target water source;

[0138] Determine the single-well water supply volume of the target coalbed methane well based on the water production source and connectivity status.

[0139] In a possible implementation, the relationship between the sulfate ion concentration and the calcium ion concentration in the water source can reflect the source of the replenishment water, and further reflect the water-richness of the aquifer corresponding to the water source; by obtaining the sulfate ion and calcium ion concentrations in the water source corresponding to the target coalbed methane well, the source of the replenishment water of the target coalbed methane well is determined based on the relationship between the sulfate ion and the calcium ion, as shown in the following:

[0140] Obtaining sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well;

[0141] The source of the replenishment water for the target coalbed methane well is determined based on the sulfate ion concentration and the calcium ion concentration.

[0142] In one possible implementation, if the concentration of sulfate ions in the water source corresponding to the target coalbed methane well is positively correlated with the concentration of calcium ions, it indicates that the water-bearing layer corresponding to the water source is relatively water-rich and the water supply of a single well is relatively large; if the concentration of sulfate ions in the target coalbed methane well is not positively correlated with the concentration of calcium ions, it indicates that the water-bearing layer corresponding to the water source is relatively poor in water-richness and the water supply of a single well is relatively small. Figure 4 A scatter plot showing the relationship between sulfate ions and calcium ions shown in an exemplary embodiment of the present application is shown, such as Figure 4As shown in the figure, the sulfate ion concentration and calcium ion concentration in the water source are obtained according to the water quality monitoring report of the water source corresponding to the target coalbed methane well, with the calcium ion concentration as the X-axis and the sulfate ion concentration as the Y-axis. If the sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well are positively correlated, such as Figure 4 If the points in the area 410 shown in the figure are not positively correlated, it means that the water source corresponding to the target coalbed methane well is located in a water-bearing layer with strong water richness; if the sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well are not positively correlated, such as Figure 4 The points in the area 420 shown indicate that the water-richness of the aquifer where the single well water source corresponding to the target coalbed methane is located is poor.

[0143] In a possible implementation, the connectivity status between the fracturing cracks and the target water source can be evaluated through a single well fracturing operation curve.

[0144] Among them, the fracturing cracks refer to the cracks produced by hydraulic fracturing in the early stage of exploration of the target coalbed methane well in order to evaluate the gas production of the target coalbed methane well.

[0145] In a possible implementation, the step of obtaining the connectivity status between the hydraulic fractures of the target coalbed methane well and the target water source is implemented as follows:

[0146] Obtain the single well fracturing construction curve of the target coalbed methane well;

[0147] Based on the single well fracturing construction curve, the connectivity status between the fracturing cracks of the target coalbed methane well and the target water source is obtained.

[0148] In a possible implementation, based on a single well fracturing construction curve, obtaining the connectivity status between the fracturing cracks of a target coalbed methane well and a target water source includes:

[0149] Obtaining the construction pressure based on the single well fracturing construction curve;

[0150] Based on the construction pressure and the shape of the single well fracturing construction curve, the connectivity status between the fracturing cracks of the target coalbed methane well and the water source is obtained.

[0151] In a possible implementation, the greater the construction pressure, the more stable the shape of the single-well fracturing construction curve is, indicating that the connectivity between the fracturing cracks and the water source is lower.

[0152] In one possible implementation, in the process of obtaining the connectivity status between the fracturing cracks of the target coalbed methane well and the water source, there is no need to determine the specific value of the connectivity status. The connectivity status can be graded, for example, into high, medium, and low levels, and the difficulty of mining the target coalbed methane well is determined based on the level of the connectivity status.

[0153] Step 250, in response to the single-well water supply of the target coalbed methane well satisfying the second condition, determining that the target coalbed methane well has production potential.

[0154] In a possible implementation, the second condition includes: the concentration of sulfate ions and the concentration of calcium ions in the water source corresponding to the coalbed methane well are not positively correlated, the construction pressure is greater than the pressure threshold, and the single well fracturing construction curve is stable. Schematically, the pressure threshold may be 8 MPa.

[0155] After determining the target coalbed methane well as the second candidate potential well, the single-well water supply volume of the target coalbed methane well is evaluated, and the coalbed methane well whose water production source is a weakly water-rich aquifer and whose connectivity between the fracturing fracture and the target water source is in a medium or low connectivity state is determined as a potential well.

[0156] In response to the non-positive correlation between the concentrations of sulfate ions and calcium ions in the target water source, the construction pressure corresponding to the target coalbed methane well is greater than the pressure threshold, and the single-well fracturing construction curve is stable, that is, the single-well water source replenishment of the target coalbed methane well meets the second condition, then the target coalbed methane well is determined to be a potential well with production potential.

[0157] In a possible implementation, in the process of evaluating the production potential of the target coalbed methane well based on the single-well water source recharge of the target coalbed methane well, priority is given to the influence of the water source of the replenishment water on the water source recharge of the single well, and in response to the weak water richness corresponding to the water source of the replenishment water, the influence of the connectivity between the hydraulic fracture and the target water source on the water source recharge of the single well is determined. In other words, when it is determined that the water source of the replenishment water is a water-rich aquifer, it can be determined that the target coalbed methane well has no production potential, and there is no need to determine the connectivity between the hydraulic fracture and the target water source.

[0158] To summarize, the method for determining the production potential of a coalbed methane well provided in the embodiment of the present application makes a preliminary judgment on the production potential of the high-yield coalbed methane water well to be treated by preliminarily evaluating the development unit in which the high-yield coalbed methane water well to be treated is located. After determining that the development unit in which the high-yield coalbed methane water well to be treated is located meets certain conditions, the difficulty and necessity of mining are further determined based on the gas content and water supply of the high-yield coalbed methane water well. In the process of determining the production potential of the high-yield coalbed methane water well, by comprehensively considering the resource basic data of the area where the high-yield coalbed methane water well is located, the gas content of a single well and the water supply situation on the production of the high-yield coalbed methane water well, an efficient judgment on the gas production potential of the high-yield coalbed methane water well is achieved, and then the potential high-yield coalbed methane water well can be treated in a targeted manner to increase the gas production of a single well.

[0159] The method for determining the production potential of a coalbed methane well provided in this application is applied to the treatment scenario of a low-yield coalbed methane high-yield water well; wherein, the low production of a coalbed methane high-yield water well may be due, on the one hand, to the weak gas production capacity of the coalbed methane high-yield water well itself, and on the other hand, may be due to the fact that the capacity of the drainage and production equipment is far lower than the water production capacity of the formation. The low production problem can be solved by replacing the drainage and production equipment. In order to save expenses, it is necessary to evaluate the production potential of a low-yield coalbed methane high-yield water well.

[0160] Taking the process of evaluating the production potential of a target coalbed methane well based on the water supply of a single well of the target coalbed methane well as an example, giving priority to the impact of the water source of the replenishment water on the water supply of a single well, Figure 5 A flowchart of a method for determining the production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown. The method can be executed by a computer device, such as Figure 5 As shown, the method for determining the production potential of a coalbed methane well includes:

[0161] Step 510, evaluate the resource base of the development unit where the single well is located, and determine the first candidate potential well.

[0162] Indicatively, there are 46 coalbed methane wells in the T1 well area with water production exceeding 15 cubic meters per day, that is, these 46 coalbed methane wells are high-yield water wells of coalbed methane. The current drainage and production equipment cannot meet the pressure reduction requirements. It is necessary to determine whether it is necessary to replace the pump and / or the pumping to ensure continuous pressure reduction and gas production of the single well, that is, it is necessary to analyze the production potential of these 46 coalbed methane wells.

[0163] Among them, the evaluation indicators for evaluating the resource base of the development unit where the single well is located include: gas content of the development unit, coal seam thickness and coal seam burial depth. The gas content of the selected development unit is greater than 13cm 3 / g, the development units with coal seam thickness greater than 3m and vertical coal seam burial depth less than 900m are regarded as high-quality resource areas, and the coalbed methane wells existing in the high-quality resource areas are obtained as potential analysis wells. Assuming that among the 46 wells, there are 25 wells located in the high-quality resource areas, these 25 wells will be taken as the first candidate potential wells in the next step.

[0164] Step 520, determining fault distribution data.

[0165] In a possible implementation, regional fault distribution is divided according to seismic and well logging data, and the stratigraphic fault distance of the fault and the distance between each potential analysis well and the fault are determined.

[0166] Step 530, based on the fault distribution data, calculate the gas content of each first candidate potential analysis well and determine the second candidate potential well.

[0167] The gas content of each potential analysis well is calculated by the distance between each potential analysis well and the fault and the formation fault distance of the fault using formula (1). The gas content of each potential analysis well is selected as 3 / g potential analysis wells are selected as candidate potential wells for the next step. Assume that among the 25 first candidate potential wells, 15 wells have gas contents greater than 13cm 3 / g, these 15 wells will be taken as the second candidate potential wells in the next step.

[0168] Step 540, obtaining the water production source of the replenishment water of each second candidate potential well, and determining the third candidate potential well.

[0169] According to the SO4 2- Ion concentration and Ca 2+ The relationship between ion concentration and the source of make-up water is used to determine the source of water produced. 2+ The X-axis is the ion concentration, with SO4 2- The Y axis shows the ion concentration, and the SO4 2- Ion concentration and Ca 2+ The ion concentration is made into a scatter plot. If the SO4 2- Ion concentration and Ca 2+ When the ion concentration is positively correlated, it is determined that the water-rich aquifer corresponding to the recharge water of the coalbed methane well is strong. If the SO4 2- Ion concentration and Ca 2+ ion concentration is not positively correlated, it is determined that the water-richness of the aquifer corresponding to the recharge water of the coalbed methane well is poor; the well with poor water-richness of the aquifer corresponding to the recharge water is selected as the third candidate potential well. Assuming that there are 10 wells in the second candidate potential well, the SO4 2- Ion concentration and Ca 2+ If the ion concentration is not positively correlated, these 10 wells will be used as the third candidate potential wells in the next step.

[0170] Step 550, obtaining the connectivity status between the hydraulic fractures of each third candidate potential well and the corresponding water source, and determining the potential well.

[0171] Based on the single well fracturing construction curve, the connectivity between the fracturing cracks and the corresponding water source is judged. The wells with the corresponding single well fracturing construction curve indicating the construction pressure greater than 8MPa and the single well fracturing construction curve with a stable shape are selected as potential wells that can be treated. Assuming that among the 10 third candidate potential wells, there are 6 wells with SO4 2- If the ion concentration is less than 15 mg / L, the construction pressure is greater than 8 MPa, and the single-well fracturing construction curve is stable, these 6 wells will be obtained as potential wells.

[0172] Guided by the potential wells determined by the above process, these six wells were treated by replacing pumps and pumping. In actual verification, the daily gas production increased by 8,000 cubic meters compared with before the treatment measures were taken, and the average gas production increase per well was 1,300 cubic meters.

[0173] To summarize, the method for determining the production potential of a coalbed methane well provided in the embodiment of the present application makes a preliminary judgment on the production potential of the coalbed methane well to be treated by preliminary evaluation of the development unit in which the coalbed methane well to be treated is located. After determining that the development unit in which the coalbed methane well to be treated is located meets certain conditions, the difficulty and necessity of mining are further determined based on the gas content and water supply of the coalbed methane well. In this way, in the process of determining the production potential of the coalbed methane well, by comprehensively considering the basic resource data of the area where the coalbed methane well is located, the gas content of a single well and the water supply situation on the production of the coalbed methane well, an efficient judgment on the gas production potential of a high-yield coalbed methane water well can be achieved, so that the high-yield water well with potential can be treated in a targeted manner to increase the gas production of a single well.

[0174] Figure 6 A block diagram of a device for determining the production potential of a coalbed methane well according to an exemplary embodiment of the present application is shown. The device can be applied to a computer device, such as Figure 6 As shown, the device for determining the production potential of a coalbed methane well comprises:

[0175] The resource basic data acquisition module 610 is used to acquire the resource basic data of the target development unit; the target development unit is the development unit where the target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold;

[0176] The fault data acquisition module 620 is used to acquire the fault data of the fault corresponding to the target coalbed methane well in response to the resource basic data of the target development unit meeting the first condition;

[0177] A gas content calculation module 630, for calculating the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well;

[0178] A single-well water supply acquisition module 640 is used to acquire the single-well water supply of the target coal-bed methane well in response to the gas content of the target coal-bed methane well reaching a first gas content threshold;

[0179] The production potential determination module 650 is used to determine that the target coalbed methane has production potential in response to the single-well water supply of the target coalbed methane well satisfying the second condition.

[0180] In a possible implementation, the resource basic data of the target development unit includes: the gas content of the target development unit, the coal seam thickness of the target development unit, and the coal seam depth of the target development unit;

[0181] The resource basic data acquisition module 610 is used to acquire the gas content of the target development unit, the coal seam thickness of the target development unit, and the buried depth of the coal seam of the target development unit.

[0182] In a possible implementation, the target development unit includes at least one developed coalbed methane well;

[0183] The resource basic data acquisition module 610 includes:

[0184] A coalbed methane well resource basic data acquisition submodule is used to obtain the gas content, coal seam thickness and coal seam burial depth of at least one developed coalbed methane well;

[0185] The development unit resource basic data acquisition submodule is used to calculate the gas content, coal seam thickness and coal seam burial depth of the target development unit based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well.

[0186] In one possible implementation, the first condition includes: the gas content of the development unit is greater than a second gas content threshold, the coal seam thickness of the development unit is greater than a first distance threshold, and the coal seam burial depth of the development unit is less than a second distance threshold.

[0187] In a possible implementation, the tomographic data acquisition module 620 includes:

[0188] The formation fault distance acquisition submodule is used to obtain the formation fault distance of the fault corresponding to the target coalbed methane well;

[0189] And, the interval distance acquisition submodule is used to obtain the distance between the fault corresponding to the target coalbed methane well and the target coalbed methane well.

[0190] In a possible implementation, the single well water supply quantity acquisition module 640 includes:

[0191] The water source acquisition submodule is used to obtain the water source of the replenishment water; the water source is used to indicate the aquifer where the target water source is located; the target water source refers to the water source of the replenishment water corresponding to the target coalbed methane well;

[0192] A connectivity status acquisition submodule is used to acquire the connectivity status between the fracturing cracks of the target coalbed methane well and the target water source;

[0193] The single-well water supply quantity determination submodule is used to determine the single-well water supply quantity of the target coalbed methane well according to the water production source and the connectivity status.

[0194] In a possible implementation, the water source acquisition submodule includes:

[0195] An ion concentration acquisition unit, used to acquire the sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well;

[0196] The produced water source acquisition unit is used to determine the produced water source of the make-up water based on the sulfate ion concentration and the calcium ion concentration.

[0197] In a possible implementation, the connectivity status acquisition submodule includes:

[0198] A single well fracturing construction curve acquisition unit is used to acquire a single well fracturing construction curve of a target coalbed methane well;

[0199] The connectivity state acquisition unit is used to acquire the connectivity state between the fracturing crack and the target water source based on the single well fracturing construction curve.

[0200] To summarize, the device for determining the production potential of a coalbed methane well provided in the embodiment of the present application is applied to a computer device, and makes a preliminary judgment on the production potential of the coalbed methane well to be treated by making a preliminary evaluation of the development unit in which the coalbed methane well to be treated is located. After determining that the development unit in which the coalbed methane well to be treated satisfies certain conditions, the difficulty and necessity of mining are further determined according to the gas content and water supply of the coalbed methane well. In this way, in the process of determining the production potential of the coalbed methane well, by comprehensively considering the basic resource data of the area where the coalbed methane well is located, the gas content of a single well and the water supply situation on the production of the coalbed methane well, an efficient judgment on the gas production potential of a high-yield coalbed methane water well can be achieved, so that the high-yield water well with potential can be treated in a targeted manner to increase the gas production of a single well.

[0201] Figure 7 700 is a block diagram of a computer device according to an exemplary embodiment. The computer device may be a server for executing the method for determining the production potential of a coalbed methane well provided in the embodiment of the present application, and the computer device 700 includes a central processing unit (CPU) 701, a system memory 704 including a random access memory (RAM) 702 and a read-only memory (ROM) 703, and a system bus 705 connecting the system memory 704 and the central processing unit 701. The computer device 700 also includes a basic input / output system (I / O system) 706 for helping to transmit information between various devices in the computer, and a large-capacity storage device 707 for storing an operating system 713, an application program 714 and other program modules 715.

[0202] The basic input / output system 706 includes a display 708 for displaying information and an input device 709 such as a mouse and a keyboard for user inputting information. The display 708 and the input device 709 are connected to the central processing unit 701 through an input / output controller 710 connected to the system bus 705. The basic input / output system 707 may also include an input / output controller 710 for receiving and processing inputs from a plurality of other devices such as a keyboard, a mouse, or an electronic stylus. Similarly, the input / output controller 710 also provides output to a display screen, a printer, or other types of output devices.

[0203] The mass storage device 707 is connected to the central processing unit 701 via a mass storage controller (not shown) connected to the system bus 705. The mass storage device 707 and its associated computer readable medium provide non-volatile storage for the computer device 700. That is, the mass storage device 707 may include a computer readable medium (not shown) such as a hard disk or a compact disc read-only memory (CD-ROM) drive.

[0204] Without loss of generality, the computer-readable medium may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, Erasable Programmable Read Only Memory (EPROM), Electronically-Erasable Programmable Read-Only Memory (EEPROM), flash memory or other solid-state storage technology, CD-ROM, Digital Versatile Disc (DVD) or other optical storage, cassettes, tapes, disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that the computer storage medium is not limited to the above. The above-mentioned system memory 704 and mass storage device 707 can be collectively referred to as memory.

[0205] According to various embodiments of the present application, the computer device 700 can also be connected to a remote computer on the network through a network such as the Internet. That is, the computer device 700 can be connected to the network 712 through the network interface unit 711 connected to the system bus 705, or the network interface unit 711 can be used to connect to other types of networks or remote computer systems (not shown).

[0206] The memory also includes one or more programs, which are stored in the memory. The CPU 701 implements the Figure 1 Figure 2 or Figure 5 All or part of the steps of the method shown.

[0207] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0208] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, at least one program, code set, or instruction set can be executed by a processor to perform the above Figure 1 , Figure 2 or Figure 5 All or part of the steps of the method shown in any embodiment. For example, the non-transitory computer-readable storage medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

[0209] The present application also provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device performs the above Figure 1 , Figure 2 or Figure 5 All or part of the steps of the method for determining the production potential of a coalbed methane well shown in any embodiment.

[0210] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0211] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for determining the production potential of a coalbed methane well, characterized in that: The method comprises: Obtain resource basic data of a target development unit; the target development unit is a development unit where a target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold; In response to the resource basic data of the target development unit meeting a first condition, acquiring fault data of a fault corresponding to the target coalbed methane well; Calculating the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well; In response to the gas content of the target coalbed methane well reaching a first gas content threshold, obtaining a single-well water source recharge amount of the target coalbed methane well; In response to the single-well water supply of the target coalbed methane well satisfying the second condition, determining that the target coalbed methane well has production potential; Wherein, the resource basic data of the target development unit includes: the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam depth of the target development unit; the acquisition of the resource basic data of the target development unit includes: acquiring the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam burial depth of the target development unit; the first condition includes: the gas content of the development unit is greater than the second gas content threshold, the coal seam thickness of the development unit is greater than the first distance threshold, and the coal seam burial depth of the development unit is less than the second distance threshold; The second condition includes: the single-well water source replenishment is less than the replenishment threshold, or the single-well water source replenishment is at a specified level; or the second condition includes: the concentration of sulfate ions and the concentration of calcium ions in the water source corresponding to the target coalbed methane well are not positively correlated, the construction pressure of the target coalbed methane well is greater than the pressure threshold, and the single-well fracturing construction curve of the target coalbed methane well is stable.

2. The method according to claim 1, characterized in that The target development unit includes at least one developed coalbed methane well; The obtaining of the gas content of the target development unit, the thickness of the coal seam of the target development unit, and the buried depth of the coal seam of the target development unit includes: Obtain the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well; Based on the gas content, coal seam thickness and coal seam burial depth of at least one developed coal seam methane well, the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam burial depth of the target development unit are calculated.

3. The method according to claim 1, characterized in that The obtaining of fault data of the fault corresponding to the target coalbed methane well includes: Obtaining the stratigraphic fault distance of the fault corresponding to the target coalbed methane well; And, obtaining the distance between the fault corresponding to the target coalbed methane well and the target coalbed methane well.

4. The method according to claim 1, characterized in that: The step of obtaining the single-well water supply amount of the target coalbed methane well includes: Obtaining the water source of the replenishment water; the water source is used to indicate the aquifer where the target water source is located; the target water source refers to the water source of the replenishment water corresponding to the target coalbed methane well; Obtaining the connectivity status between the hydraulic fractures of the target coalbed methane well and the target water source; The single-well water supply volume of the target coalbed methane well is determined according to the water production source and the connectivity status.

5. The method according to claim 4, characterized in that The water source for obtaining the replenishment water includes: Obtaining sulfate ion concentration and calcium ion concentration of the water source corresponding to the target coalbed methane well; The produced water source of the makeup water is determined based on the sulfate ion concentration and the calcium ion concentration.

6. The method according to claim 4, characterized in that The obtaining of the connectivity status between the hydraulic fracture of the target coalbed methane well and the target water source includes: Obtaining a single well fracturing construction curve of the target coalbed methane well; Based on the single well fracturing construction curve, the connectivity status between the fracturing cracks of the target coalbed methane well and the target water source is obtained.

7. A device for determining the production potential of a coalbed methane well, characterized in that: The device comprises: A resource basic data acquisition module is used to acquire resource basic data of a target development unit; the target development unit is a development unit where a target coalbed methane well is located; the target coalbed methane well is a coalbed methane well whose water production is greater than a specified water production threshold; A fault data acquisition module, configured to acquire fault data of a fault corresponding to the target coalbed methane well in response to the resource basic data of the target development unit meeting a first condition; A gas content calculation module, used to calculate the gas content of the target coalbed methane well based on the fault data of the fault corresponding to the target coalbed methane well; A single-well water supply acquisition module, configured to acquire the single-well water supply of the target coal-bed methane well in response to the gas content of the target coal-bed methane well reaching a first gas content threshold; A production potential determination module, configured to determine that the target coalbed methane has production potential in response to the single-well water supply of the target coalbed methane well satisfying a second condition; The resource basic data of the target development unit includes: the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam depth of the target development unit; the resource basic data acquisition module is used to acquire the gas content of the target development unit, the coal seam thickness of the target development unit and the coal seam burial depth of the target development unit; the first condition includes: the gas content of the development unit is greater than the second gas content threshold, the coal seam thickness of the development unit is greater than the first distance threshold, and the coal seam burial depth of the development unit is less than the second distance threshold; The second condition includes: the single-well water source replenishment is less than the replenishment threshold, or the single-well water source replenishment is at a specified level; or the second condition includes: the concentration of sulfate ions and the concentration of calcium ions in the water source corresponding to the target coalbed methane well are not positively correlated, the construction pressure of the target coalbed methane well is greater than the pressure threshold, and the single-well fracturing construction curve of the target coalbed methane well is stable.

8. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for determining the production potential of a coalbed methane well as described in any one of claims 1 to 6.

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