Heterogeneous gas reservoir development well type classification method and device

Abstract

The application provides a heterogeneous gas reservoir development well type classification method and device, and the method comprises the following steps: calculating the open flow capacity and dynamic reserves of a heterogeneous gas reservoir development well; and classifying the heterogeneous gas reservoir development well type according to the open flow capacity and the dynamic reserves. The application can comprehensively and systematically evaluate the production capacity of the development well, improve the early high yield and long-term stable yield of the development gas well, thereby improving the development benefit of the gas reservoir and realizing the development efficiency of the gas reservoir.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of natural gas development, in particular to a method and device for classifying well types in a heterogeneous gas reservoir. BACKGROUND

[0002] There is no industry-recognized classification standard or method for the classification of natural gas well types. Due to differences in research purposes and professional backgrounds, different researchers use different data bases to classify natural gas well types. Existing classification methods include: using gas well flow curves to classify gas well types, dividing gas wells into stable flow and unstable flow types, so as to analyze the production dynamic characteristics of gas wells and develop development measures. A variety of parameters are used to determine the comprehensive evaluation coefficient of each single well by using the grey correlation method for classification. The daily gas production is used to classify gas wells into low-yield gas wells, medium-yield gas wells and high-yield gas wells. XU Zhiqiang [4] explored the classification and management method of gas wells in order to realize stable production of old gas fields. According to the conditions of sand production, water production and pressure of gas wells, the gas wells are divided into water production gas wells, low-pressure gas wells and slightly sand production gas wells, so that corresponding development and management measures are adopted for different types of gas wells, so as to realize stable production of the whole gas reservoir. Based on the analysis of dynamic and static data of gas wells, the clustering analysis method is used to divide the gas wells into four categories. Based on the analysis method of unit casing pressure drop gas production, the gas well types in Sulige gas field are classified, and the application effect is good.

[0003] At present, different professional personnel use different parameters and indicators for the classification of natural gas well types, and the classification results are different. Overall, for the natural gas reservoir development profession, in order to achieve the goal of scientific research and efficient management, four indicators are often used for the classification of gas well types: reservoir parameters, open flow capacity, daily gas production and unit pressure drop gas production. The reservoir parameters mainly consider the effective thickness of the gas well for classification, which belongs to a static method and cannot dynamically reflect the productivity of the gas well. The open flow capacity and daily gas production can directly reflect the productivity of the gas well. The open flow capacity reflects the seepage characteristics of the near-wellbore formation in the early stage of production. With the production, the reservoir in the far-well zone is gradually developed, and the production capacity of the gas well is more real at this time. Since the daily gas production also changes with the change of production system, the daily gas production cannot truly reflect the production capacity of the gas well. For a pseudo-homogeneous gas reservoir, the unit pressure drop gas production and the production time can present a good power function relationship, but for a strong heterogeneous gas reservoir, the two cannot present a good correlation in the process of gas well production. Therefore, the use of unit pressure drop gas production index to classify the gas wells of a strong heterogeneous gas reservoir in the prior art lacks accuracy. SUMMARY

[0004] In view of the problems in the prior art, the application provides a heterogeneous gas reservoir development well type classification method and device, which can comprehensively and systematically evaluate the production capacity of development wells, improve early high yield and long-term stable yield of development gas wells, thereby improving the development efficiency of the gas reservoir and realizing the development efficiency of the gas reservoir.

[0005] To solve the above technical problems, the application provides the following technical solutions.

[0006] In a first aspect, the application provides a heterogeneous gas reservoir development well type classification method, comprising:

[0007] calculating the open flow capacity and dynamic reserves of the heterogeneous gas reservoir development well;

[0008] classifying the heterogeneous gas reservoir development well type according to the open flow capacity and the dynamic reserves.

[0009] The classification of the heterogeneous gas reservoir development well type according to the open flow capacity and the dynamic reserves comprises:

[0010] determining the initial test yield of the gas well according to the open flow capacity;

[0011] classifying the heterogeneous gas reservoir development well type based on the initial test yield and the dynamic reserves.

[0012] The classification of the heterogeneous gas reservoir development well type based on the initial test yield and the dynamic reserves comprises:

[0013] determining the linear relationship between the initial test yield and the dynamic reserves in a double logarithmic coordinate system;

[0014] classifying the heterogeneous gas reservoir development well type according to the linear relationship.

[0015] The classification of the heterogeneous gas reservoir development well type according to the linear relationship comprises:

[0016] based on the linear relationship, grouping the development wells meeting the same fitting curve into the same type of gas well.

[0017] In a second aspect, the application provides a heterogeneous gas reservoir development well type classification device, comprising:

[0018] a calculation unit configured to calculate the open flow capacity and dynamic reserves of the heterogeneous gas reservoir development well;

[0019] a classification unit configured to classify the heterogeneous gas reservoir development well type according to the open flow capacity and the dynamic reserves.

[0020] The classification unit comprises:

[0021] a production test subunit configured to determine an initial test production of the gas well according to the open flow capacity;

[0022] a classification subunit configured to classify the development well type of the heterogeneous gas reservoir based on the initial test production and the dynamic reserve of the gas well.

[0023] The classification subunit includes:

[0024] a linear module configured to determine a linear relationship between the initial test production and the dynamic reserve of the gas well in a double logarithmic coordinate;

[0025] a classification module configured to classify the development well type of the heterogeneous gas reservoir according to the linear relationship.

[0026] The classification module includes:

[0027] a classification sub-module configured to classify the development well into the same type of gas well based on the linear relationship.

[0028] In a third aspect, the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the steps of the method for classifying the development well type of the heterogeneous gas reservoir.

[0029] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program executable on a processor to implement the steps of the method for classifying the development well type of the heterogeneous gas reservoir.

[0030] According to the above technical solution, the present application provides a method and device for classifying the development well type of the heterogeneous gas reservoir, which calculates the open flow capacity and the dynamic reserve of the development well of the heterogeneous gas reservoir, classifies the development well type of the heterogeneous gas reservoir according to the open flow capacity and the dynamic reserve, comprehensively and systematically evaluates the production capacity of the development well, improves the early high production and long-term stable production of the development well, improves the development efficiency of the gas reservoir, and realizes the development efficiency of the gas reservoir. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0032] Figure 1A flowchart of a well type classification method for a heterogeneous gas reservoir in an embodiment of the present application.

[0033] Figure 2 A gas well type classification result of the prior art in an embodiment of the present application.

[0034] Figure 3 A development gas well type classification result based on seepage characteristics in an embodiment of the present application.

[0035] Figure 4 A structural schematic diagram of a well type classification device for a heterogeneous gas reservoir in an embodiment of the present application.

[0036] Figure 5 A structural schematic diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions and advantages of embodiments of the present application clearer, the following will be combined with the accompanying drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] A heterogeneous gas reservoir is influenced by the heterogeneous characteristics of reservoir scale, physical property, lithology and reservoir space. The heterogeneous gas reservoir has different scale heterogeneities, which are manifested as different scale pores, fractures and holes in a single well and different degrees of high-permeability flow channels and low-permeability dense media among wells. Therefore, in the development process of the heterogeneous gas reservoir, the high-production (high open flow capacity) ability and long-term stable production ability (high dynamic reserve) of a development well are inconsistent. In this case, any single parameter cannot be used to scientifically evaluate the development index of the gas well in the whole life cycle. Due to similar sedimentation, diagenesis and structure processes in a single block in a single gas reservoir, the macroscopic seepage characteristics in the heterogeneous gas reservoir are consistent. The embodiment proposes to use the correlation between open flow capacity and dynamic reserve to classify the development gas well type, thereby guiding the development index demonstration, development technology countermeasure formulation and development well post-evaluation in the whole development process of the gas reservoir.

[0039] The present application provides an embodiment of a well type classification method for a heterogeneous gas reservoir, referring to Figure 1 The well type classification method for the heterogeneous gas reservoir specifically includes the following contents.

[0040] S101: calculating the open flow capacity and dynamic reserve of the development well of the heterogeneous gas reservoir.

[0041] In this step, the first step is to calculate the open flow capacity and dynamic reserves of the development well. Due to the limitation of data acquisition, the calculation method of open flow capacity and dynamic reserves of the development well has adaptability. The existing method for calculating open flow capacity and dynamic reserves can scientifically and reasonably obtain the open flow capacity and dynamic reserves of the gas well.

[0042] S102: According to the open flow capacity and the dynamic reserves of the gas well, the development well type of the heterogeneous gas reservoir is divided.

[0043] In this step, based on the calculation results of open flow capacity and dynamic reserves of the development well, due to the difference of macroscopic seepage characteristics between different blocks in the same gas reservoir, the open flow capacity and dynamic reserves intersection graph of the development well presents different partition characteristics. In a single area, the sample points can be fitted as a straight line. The more complex the gas reservoir is, the more partition characteristics the open flow capacity and dynamic reserves intersection graph of the development well presents. The gas wells in different regions are divided into a type of gas well. This classification method considers the geological characteristics, drilled well type, acid fracturing process measures and other factors. The gas well type is the result of the comprehensive action of the geological conditions and process measures of the development well, which can better scientifically manage the development index, production system and development countermeasures of the gas well, so as to realize efficient development from the gas well to the gas reservoir.

[0044] It should be noted that the present embodiment is based on the difference of seepage characteristics to classify the drilled development well. The most direct application scenario is to regard the seemingly isolated development well as an organic whole, combine the geological conditions and process measures, scientifically evaluate the production capacity of the gas well, realize the matching of the high-yield capacity and stable-yield capacity of the development well, and avoid unreasonable classification of the gas well type, which leads to early high-yield (high open flow capacity) of some gas wells, rapid decline after a period of production, lack of reasonable production capacity scale basis for medium and long-term stable production capacity, and even rapid water invasion of edge and bottom water for water gas reservoir, which greatly reduces the recovery efficiency of the gas reservoir.

[0045] Further, when the development well type of the heterogeneous gas reservoir is divided according to the open flow capacity and the dynamic reserves of the gas well, the initial test production of the gas well needs to be determined according to the open flow capacity. The development well type of the heterogeneous gas reservoir is divided based on the initial test production and the dynamic reserves of the gas well, which specifically includes:

[0046] Determine the linear relationship between the initial test production and the dynamic reserves of the gas well in the double logarithmic coordinates; and divide the development well type of the heterogeneous gas reservoir according to the linear relationship.

[0047] Among them, the development well type of the heterogeneous gas reservoir is divided according to the linear relationship, which is based on the linear relationship, and the development wells meeting the same fitting curve are classified as the same type of gas well.

[0048] It should be noted that in the specific classification of gas well types, the following methods are used: seismic data is used to consider the characteristics of seismic impact, well completion logging data is used to consider the characteristics of geological bodies near the wellbore, test data is used to analyze the seepage characteristics around the wellbore, and dynamic data is used to analyze the macroscopic seepage characteristics of the geological bodies encountered by the entire gas well. For the same type of reservoir, under the conditions of using relative acid fracturing technology and development well type, the initial test production of gas wells encountering the same type of reservoir and the dynamic reserves of the gas well are linearly related on a double logarithmic coordinate system. Based on this linear relationship, gas wells can be classified. Sample points that conform to the same fitting curve are classified as the same type of gas well, and sample points that do not conform to the same fitting curve are classified as different types of gas wells.

[0049] As can be seen from the above description, the present invention provides an embodiment of a method for classifying development well types in heterogeneous gas reservoirs, which can comprehensively and systematically evaluate the production capacity of development wells; it can combine the geological characteristics of the gas reservoir to interactively verify the distribution range of different types of development wells in the gas reservoir. Generally speaking, gas wells of the same type have obvious zoning characteristics within the gas reservoir; thereby improving the development efficiency of the gas reservoir and realizing efficient development of the gas reservoir.

[0050] To further illustrate this solution, the present invention provides a specific example of a method for classifying development well types in heterogeneous gas reservoirs, which specifically includes the following:

[0051] This example uses the Moxi Formation Deng 4 Member gas reservoir in a basin as an example. The Sinian gas reservoir is a karst weathering crust type carbonate gas reservoir. The development of effective reservoirs is controlled by sedimentation and karst, and the development of high-yield wells is controlled by favorable sedimentary microfacies, favorable micro-geomorphic units and micro-fractures. The gas reservoir exhibits strong heterogeneous characteristics.

[0052] Early classifications focused on two parameters: unobstructed flow rate and dynamic reserves, establishing high-yield standards (unobstructed flow rate greater than 100 × 10⁻⁶). 4 m 3 ) and stable production standard (unobstructed flow rate greater than 10×10 8 m 3 See also Figure 2 The development wells are classified into four categories: Class I (high-testing, high-dynamic-reservoir type), Class II (low-testing, high-dynamic-reservoir type), Class III (high-testing, low-dynamic-reservoir type), and Class IV (low-testing, low-dynamic-reservoir type). This classification method relies solely on the mechanical classification of development wells based on unobstructed flow rate and dynamic reserve values, without considering the geological characteristics of the gas reservoir. In this example, by dividing the gas wells into zones, the completed development wells of the Moxideng Section 4 gas reservoir are classified into two types, see [link to relevant documentation]. Figure 3, the single type development well open flow capacity and dynamic reserves present linear relationship in logarithmic coordinates. The matrix pore and fracture-cave of the type I well are developed, the lateral connectivity is good, the test production is high, the stable production condition is good, and the stable production time is long. The dynamic reserves of the type II well are relatively low, the stable production condition is poor, and the stable production time is short. Based on the classification method, the development indexes of the gas well can be scientifically demonstrated.

[0053] The embodiment of the non-homogeneous gas reservoir development well type classification device provided by the application can realize all contents of the non-homogeneous gas reservoir development well type classification method. Figure 4 The non-homogeneous gas reservoir development well type classification device specifically includes the following contents.

[0054] The calculation unit 10 is configured to calculate the open flow capacity and the dynamic reserves of the non-homogeneous gas reservoir development well.

[0055] The classification unit 20 is configured to classify the non-homogeneous gas reservoir development well type according to the open flow capacity and the dynamic reserves of the gas well.

[0056] The classification unit includes:

[0057] The production test sub-unit is configured to determine the initial test production of the gas well according to the open flow capacity.

[0058] The classification sub-unit is configured to classify the non-homogeneous gas reservoir development well type based on the initial test production and the dynamic reserves of the gas well.

[0059] The classification sub-unit includes:

[0060] The linear module is configured to determine the linear relationship between the initial test production and the dynamic reserves of the gas well in the double logarithmic coordinates.

[0061] The classification module is configured to classify the non-homogeneous gas reservoir development well type according to the linear relationship.

[0062] The classification module includes:

[0063] The classification sub-module is configured to classify the development wells meeting the same fitting curve into the same type of gas well based on the linear relationship.

[0064] The embodiment of the non-homogeneous gas reservoir development well type classification device provided by the application can realize all contents of the non-homogeneous gas reservoir development well type classification method.

[0065] As can be seen from the above description, the heterogeneous gas reservoir development well type classification device provided in this embodiment of the invention calculates the unobstructed flow rate and dynamic reserves of the heterogeneous gas reservoir development well; and classifies the heterogeneous gas reservoir development well type according to the unobstructed flow rate and the dynamic reserves of the gas well. This can comprehensively and systematically evaluate the production capacity of development wells, improve the early high production and long-term stable production of development gas wells, thereby improving the development benefits of the gas reservoir and realizing the efficiency of gas reservoir development.

[0066] This application provides an embodiment of an electronic device for implementing all or part of the above-mentioned method for classifying development well types in heterogeneous gas reservoirs. The electronic device specifically includes the following components:

[0067] The device comprises a processor, memory, a communications interface, and a bus; wherein the processor, memory, and communications interface communicate with each other via the bus; the communications interface is used to realize information transmission between related devices; the electronic device can be a desktop computer, tablet computer, or mobile terminal, etc., and this embodiment is not limited to these. In this embodiment, the electronic device can be implemented with reference to the embodiments for implementing the method for classifying the development well types of heterogeneous gas reservoirs and the embodiments for implementing the device for classifying the development well types of heterogeneous gas reservoirs, the contents of which are incorporated herein, and repeated details will not be described again.

[0068] Figure 5 This is a schematic block diagram illustrating the system configuration of the electronic device 9600 according to an embodiment of this application. Figure 5 As shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It is worth noting that... Figure 5 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.

[0069] In one embodiment, the function of classifying development well types for heterogeneous gas reservoirs can be integrated into the central processing unit 9100. The central processing unit 9100 can be configured to perform the following controls:

[0070] Calculate the open flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs;

[0071] The development well types of heterogeneous gas reservoirs are classified based on the unobstructed flow rate and the dynamic reserves of the gas well.

[0072] As can be seen from the above description, the electronic equipment provided in the embodiments of this application calculates the unobstructed flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs; and classifies the types of development wells in heterogeneous gas reservoirs based on the unobstructed flow rate and dynamic reserves of the gas wells. This enables a more comprehensive and systematic evaluation of the production capacity of development wells, improves the early high production and long-term stable production of development wells, thereby improving the development benefits of gas reservoirs and achieving gas reservoir development efficiency.

[0073] In another embodiment, the heterogeneous gas reservoir development well type classification device can be configured separately from the central processing unit 9100. For example, the heterogeneous gas reservoir development well type classification device can be configured as a chip connected to the central processing unit 9100, and the heterogeneous gas reservoir development well type classification function can be realized through the control of the central processing unit.

[0074] like Figure 5 As shown, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily need to include these components. Figure 5 All components shown; in addition, the electronic device 9600 may also include Figure 5 For components not shown, please refer to existing technologies.

[0075] like Figure 5 As shown, the central processing unit 9100, sometimes also referred to as a controller or operating control, may include a microprocessor or other processor device and / or logic device, which receives inputs and controls the operation of various components of the electronic device 9600.

[0076] The memory 9140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information, and also store a program for executing that information. The central processing unit 9100 may execute the program stored in the memory 9140 to perform information storage or processing, etc.

[0077] Input unit 9120 provides input to central processing unit 9100. Input unit 9120 may be, for example, a keypad or touch input device. Power supply 9170 provides power to electronic device 9600. Display 9160 displays images and text. Display may be, for example, an LCD display, but is not limited thereto.

[0078] The memory 9140 can be a solid-state memory, such as a read-only memory (ROM), random access memory (RAM), a SIM card, etc. It can also be a memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROMs. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142 for storing application programs and function programs or processes for executing the operation of the electronic device 9600 via the central processing unit 9100.

[0079] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for the electronic device's communication functions and / or for performing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0080] The communication module 9110 is a transmitter / receiver 9110 that transmits and receives signals via the antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which can be the same as in a conventional mobile communication terminal.

[0081] Based on different communication technologies, multiple communication modules 9110 can be configured in the same electronic device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby realizing typical telecommunications functions. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor 9130 is coupled to a central processing unit 9100, enabling on-device recording via the microphone 9132 and on-device playback of stored sound via the speaker 9131.

[0082] Embodiments of the present invention also provide a computer-readable storage medium capable of implementing all steps of the heterogeneous gas reservoir development well type classification method in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the heterogeneous gas reservoir development well type classification method in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:

[0083] Calculate the open flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs;

[0084] The development well types of heterogeneous gas reservoirs are classified based on the unobstructed flow rate and the dynamic reserves of the gas well.

[0085] As can be seen from the above description, the computer-readable storage medium provided in the embodiments of the present invention calculates the unobstructed flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs; and classifies the types of development wells in heterogeneous gas reservoirs based on the unobstructed flow rate and dynamic reserves of the gas wells. This enables a more comprehensive and systematic evaluation of the production capacity of development wells, improves the early high production and long-term stable production of development wells, thereby improving the development benefits of gas reservoirs and achieving gas reservoir development efficiency.

[0086] While this invention provides the method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual device or client product execution, the methods shown in the embodiments or drawings can be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0087] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, apparatus (systems), or computer program products. Therefore, the embodiments of this specification can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0088] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0089] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0090] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 Figure 1 The steps of the function specified in one or more boxes.

[0091] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this invention can be combined with each other. This invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Moreover, each aspect and / or embodiment of this invention can be used alone or in combination with one or more other aspects and / or embodiments.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for classifying development well types in heterogeneous gas reservoirs, characterized in that, include: Calculate the unobstructed flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs; The development well types of heterogeneous gas reservoirs are classified according to the unobstructed flow rate and the dynamic reserves of the gas well; The classification of development well types for heterogeneous gas reservoirs based on the unobstructed flow rate and the dynamic reserves of the gas well includes: The initial test production of the gas well is determined based on the unobstructed flow rate. The development well types of heterogeneous gas reservoirs are classified based on the initial test production and the dynamic reserves of the gas wells. The classification of heterogeneous gas reservoir development well types based on the initial test production and the dynamic reserves of the gas well includes: Determine the linear relationship between the initial test production and the dynamic reserves of the gas well in a double logarithmic coordinate system; The development well types for heterogeneous gas reservoirs are classified according to the aforementioned linear relationship; The classification of development well types for heterogeneous gas reservoirs based on the linear relationship includes: classifying sample points that conform to the same fitting curve as the same type of gas well, and classifying sample points that do not conform to the same fitting curve as different types of gas wells; the heterogeneous gas reservoir is a karst weathering crust type carbonate gas reservoir.

2. A device for classifying development well types in heterogeneous gas reservoirs, characterized in that, include: The calculation unit is used to calculate the unobstructed flow rate and dynamic reserves of development wells in heterogeneous gas reservoirs. A classification unit is used to classify the development well types of heterogeneous gas reservoirs based on the unobstructed flow rate and the dynamic reserves of the gas well; The partitioning unit includes: The production test subunit is used to determine the initial test production of the gas well based on the unobstructed flow rate. Sub-units are used to classify the development well types of heterogeneous gas reservoirs based on the initial test production and the dynamic reserves of the gas wells; The partitioning subunit includes: A linear module is used to determine the linear relationship between the initial test production and the dynamic reserves of the gas well in a double logarithmic coordinate system. The classification module is used to classify the development well types of heterogeneous gas reservoirs according to the linear relationship. The classification of development well types for heterogeneous gas reservoirs based on the linear relationship includes: classifying sample points that conform to the same fitting curve as the same type of gas well, and classifying sample points that do not conform to the same fitting curve as different types of gas wells; the heterogeneous gas reservoir is a karst weathering crust type carbonate gas reservoir.

3. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method for classifying development well types of heterogeneous gas reservoirs as described in claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method for classifying development well types of heterogeneous gas reservoirs as described in claim 1.

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