Fracturing method and device for coal bed gas horizontal well, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a fracturing method and device for a coal bed gas horizontal well, electronic equipment and a storage medium. The fracturing method for the coal bed gas horizontal well comprises the steps that drilling parameter information of a target horizontal well and logging data of an adjacent well of the target horizontal well are obtained; wherein the drilling parameter information of the target horizontal well at least comprises while-drilling gamma data, gas logging total hydrocarbon data and production casing section hoop data; according to the while-drilling gamma data, the gas logging total hydrocarbon data and the logging data of the adjacent well, a to-be-fractured layer of the target horizontal well is determined; determining fracturing points in the to-be-fractured layer of the target horizontal well according to the established fracturing point spacing and crack overlapping relation model by using the production casing pipe joint hoop data; wherein the fracturing point spacing and crack overlapping relation model is used for representing an overlapping relation between fracturing point spacing and cracks under different fracturing scales; and according to the fracturing points, the target horizontal well is fractured.

Description

Technical Field

[0001] The present application relates to the technical field of coalbed methane development, and in particular to a coalbed methane horizontal well fracturing method, device, electronic equipment and storage medium. Background Art

[0002] At present, L-type horizontal wells are the main well type for coalbed methane development. Compared with vertical well fracturing, coalbed methane horizontal wells can better connect with coal reservoirs, expand the contact area between the wellbore and the coal reservoir, and increase the seepage channel of coalbed methane.

[0003] Coal reservoirs are unconventional reservoirs with low porosity and low permeability. Hydraulic fracturing is the most important means to increase the production of coalbed methane. Through hydraulic fracturing, the reservoir can form a more complete cleat and fracture grid system, thereby effectively expanding the range of the coal reservoir pressure drop funnel and increasing the production of coalbed methane single wells. Among them, horizontal well staged fracturing technology is an effective method to increase the coalbed methane production of coalbed methane horizontal wells, and the selection of reasonable fracturing points is a prerequisite for efficient staged fracturing construction. Especially for the Qinshui Basin, its coal reservoir thickness is large and the resources are rich, but the vertical heterogeneity is strong, and the fracturing engineering conditions vary greatly, making it difficult to select reasonable fracturing points for fracturing construction. In related technologies, there is still a lack of accurate and reasonable methods for determining fracturing points for coalbed methane horizontal wells.

[0004] Therefore, how to accurately and reasonably determine the fracturing point of a coalbed methane horizontal well, fracturing the coalbed methane horizontal well based on the fracturing point, and effectively increase the single well production of the coalbed methane well is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiments of the present application provide a method, device, electronic equipment and storage medium for fracturing a coalbed methane horizontal well, which are used to accurately and reasonably determine the fracturing point of the coalbed methane horizontal well, so as to fracture the coalbed methane horizontal well based on the fracturing point, thereby effectively improving the single well production of the coalbed methane well.

[0006] One of the embodiments of the present application provides a method for fracturing a coalbed methane horizontal well, the method comprising: obtaining drilling parameter information of a target horizontal well, and logging data of adjacent wells of the target horizontal well; wherein the drilling parameter information of the target horizontal well comprises at least gamma ray data while drilling, total hydrocarbon data of gas logging, and production casing joint hoop data; determining the layer to be fractured of the target horizontal well according to the gamma ray data while drilling, the total hydrocarbon data of gas logging, and the logging data of the adjacent wells; utilizing the production casing joint hoop data, and according to an established model of the relationship between the spacing between fracturing points and the overlap of fractures, determining the fracturing points in the layer to be fractured of the target horizontal well; wherein the model of the relationship between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales; and fracturing the target horizontal well according to the fracturing points.

[0007] In some embodiments, the gamma data while drilling includes a double gamma curve while drilling; determining the layer to be fractured of the target horizontal well based on the gamma data while drilling, the gas logging total hydrocarbon data, and the logging data of the adjacent wells includes: determining the high-quality fractured layer section in the work area where the target horizontal well is located according to the logging data of the adjacent wells and the gas logging total hydrocarbon data; determining the original structural coal seam section in the work area where the target horizontal well is located according to the logging data of the adjacent wells; and determining the layer to be fractured of the target horizontal well based on the high-quality fractured layer section and the original structural coal seam section in the work area where the target horizontal well is located using the double gamma curve while drilling.

[0008] In some embodiments, the logging data of the adjacent wells include gamma data; determining the high-quality fracturing layer section in the work area where the target horizontal well is located based on the logging data of the adjacent wells and the gas logging total hydrocarbon data includes: using the gamma data to establish a regional reservoir physical model of the work area where the target horizontal well is located; obtaining the vertical coal seam structure of the work area where the target horizontal well is located based on the regional reservoir physical model; determining the high-quality fracturing layer section in the work area where the target horizontal well is located based on the vertical coal seam structure and the gas logging total hydrocarbon value.

[0009] In some embodiments, the logging data of the adjacent wells include resistivity data and acoustic time difference data; determining the native structural coal seam section of the work area where the target horizontal well is located based on the logging data of the adjacent wells includes: using the resistivity data and the acoustic time difference data to establish a regional reservoir coal body structure development model of the work area where the target horizontal well is located; obtaining the vertical coal body structure of the work area where the target horizontal well is located based on the regional reservoir coal body structure development model; and determining the native structural coal seam section of the work area where the target horizontal well is located based on the vertical coal body structure.

[0010] In some embodiments, the use of the while drilling double gamma curve to determine the layer to be fractured of the target horizontal well according to the high-quality fractured layer section and the original structure coal seam section in the work area where the target horizontal well is located includes: determining the relative position of the well trajectory of the target horizontal well in the coal seam according to the while drilling double gamma curve; and determining the layer to be fractured of the target horizontal well in the high-quality fractured layer section or the original structure coal seam section in the work area where the target horizontal well is located according to the relative position.

[0011] In some embodiments, the use of the production casing joint hoop data and the established model of the relationship between the spacing between fracturing points and the overlap of fractures in the target horizontal well to determine the fracturing points in the layer to be fractured, includes: determining the spacing between fracturing points according to the model of the relationship between the spacing between fracturing points and the overlap of fractures and the fracturing scale of the target horizontal well; determining multiple fracturing points in the layer to be fractured in the target horizontal well according to the spacing between the fracturing points; and using the production casing joint hoop data, adjusting the multiple fracturing points so that the distance between any fracturing point and the casing joint hoop is greater than a preset length threshold, thereby obtaining a final fracturing point.

[0012] In some embodiments, the relationship model between the spacing between fracturing points and the overlap of cracks is established in the following manner: based on the acquired fracture monitoring test data of different structural areas, the fracture distribution after multiple fracturing transformations is obtained; and according to the fracture distribution after the multiple fracturing transformations, the relationship model between the spacing between fracturing points and the overlap of cracks is established.

[0013] One of the embodiments of the present application provides a fracturing device for a coalbed methane horizontal well, the device comprising: an acquisition module, used to acquire drilling parameter information of a target horizontal well, and logging data of neighboring wells of the target horizontal well; wherein the drilling parameter information of the target horizontal well at least includes dual gamma data while drilling, gas logging total hydrocarbon data, and production casing joint hoop data; a first determination module, used to determine the layer to be fractured of the target horizontal well according to the dual gamma data while drilling, the gas logging total hydrocarbon data, and the logging data of the neighboring wells; a second determination module, used to determine the fracturing point in the layer to be fractured of the target horizontal well according to the production casing joint hoop data and an established model of the relationship between the spacing between fracturing points and the overlap of fractures; wherein the model of the relationship between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales; a fracturing module, used to fractur the target horizontal well according to the fracturing point.

[0014] An embodiment of the present application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the method described above when running the program.

[0015] An embodiment of the present application provides a storage medium for storing a computer-readable program. When the computer-readable program is executed, the method described above is executed.

[0016] The above technical solution provided by the embodiment of the present application has at least the following advantages compared with the prior art:

[0017] In the embodiment provided by the present application, the drilling parameter information of the target horizontal well and the logging data of the neighboring wells of the target horizontal well are obtained; the fracturing point is determined in the target horizontal well to be fractured layer according to the established model of the relationship between the spacing between the fracturing points and the overlap of the fractures using the production casing collar data; wherein the model of the relationship between the spacing between the fracturing points and the overlap of the fractures is used to represent the overlap relationship between the spacing between the fracturing points and the fractures under different fracturing scales; and the target horizontal well is fractured according to the fracturing point. Thus, the fracturing point of the coalbed methane horizontal well can be accurately and reasonably determined, and the coalbed methane horizontal well is fractured based on the fracturing point, effectively increasing the single well production of the coalbed methane well. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in the form of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0019] Figure 1 is an exemplary flow chart of a method for fracturing a coalbed methane horizontal well according to some embodiments of the present application;

[0020] Figure 2 is an exemplary flow chart of a method for determining a layer to be fractured in a target horizontal well according to some embodiments of the present application;

[0021] Figure 3 is an exemplary schematic diagram of a regional reservoir physical model according to some embodiments of the present application;

[0022] Figure 4A is an exemplary schematic diagram of a regional reservoir coal structure development model established using resistivity data according to some embodiments of the present application;

[0023] Figure 4B is an exemplary schematic diagram of another regional reservoir coal structure development model established using resistivity data according to some embodiments of the present application;

[0024] Figure 4C is an exemplary schematic diagram of a regional reservoir coal structure development model established using acoustic time difference data according to some embodiments of the present application;

[0025] Figure 4D is an exemplary schematic diagram of another regional reservoir coal structure development model established by using acoustic wave time difference data according to some embodiments of the present application;

[0026] Figure 5A is an exemplary schematic diagram of a dual gamma curve while drilling of a target horizontal well according to some embodiments of the present application;

[0027] Figure 5Bis an exemplary schematic diagram of another dual gamma curve while drilling of a target horizontal well according to some embodiments of the present application;

[0028] Figure 6 is an exemplary schematic diagram of a relationship model between fracturing point spacing and fracture overlap according to some embodiments of the present application;

[0029] Figure 7 is an exemplary schematic diagram of a fracturing device for a coalbed methane horizontal well according to some embodiments of the present application;

[0030] Figure 8 It is a schematic diagram of an exemplary structure of an electronic device according to some embodiments of the present application. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0032] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0033] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprises" and "includes" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0034] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0035] For ease of understanding, the technical solution of the present application is introduced below in conjunction with the accompanying drawings and embodiments.

[0036] Figure 1is an exemplary flow chart of a method for fracturing a coalbed methane horizontal well according to some embodiments of the present application. Figure 1 As shown, the fracturing method of a coalbed methane horizontal well includes the following steps:

[0037] Step S110, obtaining drilling parameter information of the target horizontal well and logging data of the adjacent wells of the target horizontal well.

[0038] The target horizontal well is a coalbed methane horizontal well that needs to be fractured. For example, the target horizontal well may be a coal gas horizontal well in the Qinshui Basin, where the coal reservoir is thick and rich in resources, but has strong vertical heterogeneity and large differences in fracturing engineering conditions. Therefore, in the relevant technology, it is difficult to accurately and reasonably determine the fracturing point of the target horizontal well.

[0039] The drilling parameter information of the target horizontal well includes at least gamma data while drilling, gas logging total hydrocarbon data, production casing collar data, etc. In the specific implementation process, the drilling parameters such as wellbore trajectory data, formation information, cuttings description records, gas logging total hydrocarbon, gamma data while drilling, production casing collar data, etc. of the target horizontal well can be collected.

[0040] The adjacent wells of the target horizontal well are coalbed methane vertical wells located within the preset range of the target horizontal well. The logging data of the adjacent wells include but are not limited to: gamma data, resistivity data and acoustic time difference data.

[0041] As an example only, in order to determine the fracturing point of the F64P2-5L horizontal well, the wellbore trajectory data, formation information, cuttings description records, gas logging total hydrocarbons, while drilling gamma, production casing collar data and logging data of adjacent vertical wells can be collected.

[0042] Step S120, determining the layer to be fractured of the target horizontal well according to the gamma data while drilling, the total hydrocarbon data of the gas logging, and the logging data of the adjacent wells.

[0043] In the specific implementation process, the layer to be fractured in the target horizontal well is determined based on the gamma data while drilling, gas logging total hydrocarbon data, and logging data of adjacent wells.

[0044] As an example only, the high-quality fracturing layer in the work area where the target horizontal well is located can be determined based on the well logging data and gas logging total hydrocarbon data of adjacent wells; the well trajectory position of the target horizontal well can be determined in the high-quality fracturing layer in the work area using the gamma data while drilling, thereby determining the layer to be fractured of the target horizontal well.

[0045] During the drilling of horizontal wells, near-bit steering technology is used. Therefore, the relative position of the well trajectory in the coal seam can be determined based on the changing pattern and position of the while-drilling gamma data.

[0046] For a specific embodiment of determining the to-be-fractured layer of a target horizontal well based on the well logging data of adjacent wells and the gamma data while drilling, see Figure 2 The relevant content in will not be repeated here.

[0047] Step S130, using the production casing collar data, according to the established fracturing point spacing and fracture overlap relationship model, determine the fracturing points in the to-be-fractured layer of the target horizontal well.

[0048] The relationship model between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales.

[0049] In some embodiments, in order to avoid the phenomenon of interlaced fractures and overly dense fracture channeling, the spacing between fracture points can be determined based on a model of the relationship between the spacing between fracture points and the overlap of fractures and the fracturing scale of the target horizontal well; based on the spacing between fracture points, multiple fracture points can be determined in the layer to be fractured of the target horizontal well.

[0050] In the specific implementation process, the relationship model between the spacing between fracturing points and the overlap of cracks can be established in the following ways: based on the acquired fracture monitoring test data of different structural areas, the crack distribution after various fracturing transformations is obtained; according to the crack distribution after various fracturing transformations, the relationship model between the spacing between fracturing points and the overlap of cracks is established.

[0051] As an example only, the landing point of the target horizontal well F64P2-5L is 666m vertical depth, and the normal fracturing scale is 650 cubic meters of fluid and 40-45 cubic meters of sand. Figure 6 The relationship model between the spacing between the fracturing points and the overlap of the fractures is shown in FIG. 8 , and the spacing between the fracturing points is about 80 m. According to the spacing value, multiple fracturing points as shown in the following table can be determined in the target horizontal well to be fractured layer obtained in step S120.

[0052]

[0053]

[0054] Table 1

[0055] In some embodiments, the production casing collar data can be used to adjust the multiple fracturing points obtained above so that the distance between any fracturing point and the casing collar is greater than a preset length threshold (e.g., 2 meters) to obtain the final fracturing point. For example, for the multiple fracturing points obtained above, the fracturing points that are less than 2 meters away from the casing collar position can be removed, and the remaining fracturing points are used as the final fracturing points.

[0056] As an example only, as shown in the following table, the position of the fracturing point can be adjusted according to the production casing collar data to avoid the casing by more than 2m, and the final fracturing point can be determined.

[0057]

[0058] Table 2

[0059] Step S140, fracturing the target horizontal well according to the fracturing point.

[0060] After the final fracturing points are obtained, the target horizontal well can be fractured according to the multiple fracturing points.

[0061] In the embodiments provided by the present application, the target horizontal well's gamma data, gas logging total hydrocarbon data, and well logging data of adjacent wells are used to determine the target horizontal well's to-be-fractured layer; the production casing collar data are used to determine the fracturing point in the target horizontal well's to-be-fractured layer according to the established fracturing spacing and crack overlap relationship model; and the target horizontal well is fractured according to the fracturing point. Thus, the fracturing point of the coalbed methane horizontal well can be accurately and reasonably determined, and the coalbed methane horizontal well is fractured based on the determined fracturing point, effectively increasing the single well production of the coalbed methane well, and the embodiments provided by the present application have a wide range of applications, and are applicable to all areas where staged fracturing of coalbed methane horizontal wells is used.

[0062] Figure 2 It is an exemplary flow chart of a method for determining a layer to be fractured in a target horizontal well according to some embodiments of the present application.

[0063] Step S210, determining the high-quality fracturing layer section in the work area where the target horizontal well is located based on the well logging data of the adjacent wells and the gas logging total hydrocarbon data.

[0064] In some embodiments, the logging data of adjacent wells include gamma data, which can be used to establish a regional reservoir physical model of the work area where the target horizontal well is located; based on the regional reservoir physical model, the vertical coal seam structure of the work area where the target horizontal well is located is obtained; based on the vertical coal seam structure and the total hydrocarbon value of gas logging, the high-quality fracturing layer section of the work area where the target horizontal well is located is determined.

[0065] In the specific implementation process, the coal seam section with lower gamma value can be selected according to the vertical coal seam structure; according to the gas logging total hydrocarbon data used to evaluate the gas content of the coal seam, in the coal seam section with lower gamma value, the area with gas logging total hydrocarbon value above the average value of the whole well section can be selected as the high-quality fracturing layer section. Figure 3 It is a regional reservoir physical model of the target horizontal well area established using gamma data, such as Figure 3As shown in the figure, the coal seam structure of the 3# coal seam from top to bottom is: upper coal seam, upper interlayer, middle coal seam, lower interlayer, and lower coal seam. The roof and floor are mudstone with a GR value of 140-160API; the gamma value of the lower interlayer is about 100-180API; the gamma value of the upper interlayer is about 60-80API. The GR value of the upper and middle coal seams is the lowest, 20-30API; the GR value of the lower coal seam varies greatly, 20-60API, and the GR value decreases from south to north. Therefore, the high-quality fracturing interval is in the middle and upper part of the coal seam. Then, in the middle and upper part of the coal seam, select the area where the gas logging total hydrocarbon value is above the average value of the whole well section as the high-quality fracturing interval.

[0066] Step S220, determining the original structure coal seam section of the work area where the target horizontal well is located based on the logging data of the adjacent wells.

[0067] In some embodiments, the logging data of adjacent wells include resistivity data and acoustic time difference data, which can be used to establish a regional reservoir coal body structure development model for the work area where the target horizontal well is located; based on the regional reservoir coal body structure development model, the vertical coal body structure of the work area where the target horizontal well is located is obtained; based on the vertical coal body structure, the original structural coal seam section of the work area where the target horizontal well is located is determined.

[0068] Just as an example, Figure 4A and Figure 4B It is a regional reservoir coal structure development model of the target horizontal well area established using the resistivity data of adjacent wells. Figure 4C and Figure 4D It is a regional reservoir coal body structure development model of the target horizontal well area established by using the acoustic time difference data of adjacent wells. Figure 4A , Figure 4B , Figure 4C as well as Figure 4D As shown, based on the resistivity data of adjacent wells and the acoustic time difference data, it is judged that the resistivity of the middle part of the coal seam in this work area is high, the acoustic time difference is small, the coal body structure is good, and it belongs to the primary structure coal seam section.

[0069] Step S230, using the gamma data while drilling, according to the high-quality fracturing layer section and the original structure coal seam section in the work area where the target horizontal well is located, determine the layer to be fractured of the target horizontal well.

[0070] In some embodiments, the gamma data while drilling includes a double gamma curve while drilling, and the relative position of the well trajectory of the target horizontal well in the coal seam can be determined based on the double gamma curve while drilling; based on the relative position, the layer to be fractured of the target horizontal well is determined in the high-quality fractured layer section or the original structure coal seam section in the work area where the target horizontal well is located.

[0071] Just as an example, Figure 5A and 5BAs shown in the figure, when cutting down, the lower gamma curve changes before the upper gamma curve, and when cutting up, the upper gamma curve changes first; as shown in the table below, the relative position of the well trajectory in the coal seam can be judged according to the double gamma curve, and the layer to be fractured of the target horizontal well can be determined in the high-quality fracture layer section or the original structure coal seam section.

[0072] Serial number Well depth / m GR / API Total hydrocarbons / % Coal seam location 1 1590-1615 20.6 57.2 Middle coal seam 2 1505-1545 22.1 51.9 Middle coal seam 3 1350-1370 22.4 39.0 Middle coal seam 4 1297-1308 24.6 52.1 Middle coal seam 5 1261-1265 20.6 36.9 Middle coal seam 6 1180-1192 29.8 29.9 Middle coal seam 7 1143-1148 26.2 26.2 Middle coal seam 8 1105-1115 22.5 31.3 Middle coal seam 9 981-989 24.6 32.4 Middle coal seam 10 907-914 21.8 43.7 Middle coal seam 11 1467-1473 23.4 53.4 Upper coal seam 12 1011-1024 20.8 66 Upper coal seam 13 877-885 24.2 57 Upper coal seam

[0073] Table 3

[0074] In the embodiments provided in the present application, the high-quality fracturing layer section in the work area where the target horizontal well is located is determined based on the well logging data of the adjacent wells and the gas logging total hydrocarbon data; the original structure coal seam section in the work area where the target horizontal well is located is determined based on the well logging data of the adjacent wells; and the target horizontal well is located The gamma data is used to determine the target horizontal well's to-be-fractured layer based on the high-quality fracturing layer section and the original structure coal seam section in the work area where the target horizontal well is located. Since the two aspects of the enrichment degree of coalbed methane and the engineering reformability are comprehensively considered, the high-gas-containing and high-brittle to-be-fractured layer can be determined, and fracturing construction based on the to-be-fractured layer can effectively increase the single-well production of coalbed methane wells.

[0075] Figure 7 It is an exemplary schematic diagram of a fracturing device for a coalbed methane horizontal well according to some embodiments of the present application.

[0076] like Figure 7 As shown, the fracturing device for the coalbed methane horizontal well includes: an acquisition module 710 , a first determination module 720 , a second determination module 730 , and a fracturing module 740 .

[0077] The acquisition module 710 is used to acquire the drilling parameter information of the target horizontal well and the logging data of the neighboring wells of the target horizontal well; wherein the drilling parameter information of the target horizontal well at least includes dual gamma data while drilling, gas logging total hydrocarbon data, and production casing joint collar data.

[0078] The first determination module 720 is used to determine the layer to be fractured of the target horizontal well according to the dual gamma ray data while drilling, the total hydrocarbon data of gas logging, and the logging data of the adjacent wells.

[0079] The second determination module 730 is used to determine the fracturing points in the to-be-fractured layer of the target horizontal well by using the production casing collar data and according to the established model of the relationship between the spacing between fracturing points and the overlap of fractures; wherein the relationship between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales.

[0080] The fracturing module 740 is used to perform fracturing on the target horizontal well according to the fracturing point.

[0081] In the above-mentioned embodiment of the fracturing device for coalbed methane horizontal wells, the specific processing of each module and the technical effects brought about by it can be referred to the relevant descriptions in the corresponding method embodiments, which will not be repeated here.

[0082] Figure 8 It is a schematic diagram of an exemplary structure of an electronic device according to some embodiments of the present application.

[0083] like Figure 8 As shown, the electronic device includes: at least one processor 801, at least one communication interface 802, at least one memory 803 and at least one communication bus 804; optionally, the communication interface 802 can be an interface of a communication module, such as an interface of a GSM module; the processor 801 may be a processor CPU, or an application-specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention. The memory 803 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. Among them, the memory 803 stores a program, and the processor 801 calls the program stored in the memory 803 to execute part or all of the above-mentioned method embodiments.

[0084] The present application relates to a storage medium for storing a computer-readable program. When the computer-readable program is executed, part or all of the above-mentioned method embodiments are executed.

[0085] Alternatively, the storage medium may be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

[0086] Based on the same inventive concept, an embodiment of the present application further provides a computer program product, including a computer program, which implements part or all of the above-mentioned method embodiments when executed by a processor.

[0087] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0088] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in the present application does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0089] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this application, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this application. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this application. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0090] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0091] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0092] Each patent, patent application, patent application disclosure, and other materials, such as articles, books, instructions, publications, documents, etc., cited in this application are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the content of this application, documents that limit the broadest scope of the claims of this application (currently or later attached to this application) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0093] Finally, it should be understood that the embodiments described in this application are only used to illustrate the principles of the embodiments of the present application. Other variations may also fall within the scope of the present application. Therefore, as an example and not a limitation, the alternative configurations of the embodiments of the present application may be considered to be consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly introduced and described in the present application.

Claims

1. A method for fracturing a coalbed methane horizontal well, characterized in that: The method comprises: Acquire drilling parameter information of a target horizontal well and logging data of adjacent wells of the target horizontal well; wherein the drilling parameter information of the target horizontal well at least includes gamma ray while drilling data, total hydrocarbon data of gas logging, and production casing collar data; Determine the layer to be fractured of the target horizontal well according to the gamma ray data while drilling, the gas logging total hydrocarbon data, and the logging data of the adjacent wells; Using the production casing collar data, according to the established model of the relationship between the spacing between fracturing points and the overlap of fractures, the fracturing points are determined in the to-be-fractured layer of the target horizontal well; wherein the model of the relationship between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales; The target horizontal well is fractured according to the fracturing point.

2. The method according to claim 1, characterized in that The gamma while drilling data includes a dual gamma while drilling curve; The step of determining the to-be-fractured layer of the target horizontal well according to the gamma ray data while drilling, the gas logging total hydrocarbon data, and the logging data of the adjacent wells comprises: Determine the high-quality fracturing layer section in the work area where the target horizontal well is located based on the well logging data of the adjacent wells and the gas logging total hydrocarbon data; Determine the original structure coal seam section in the work area where the target horizontal well is located based on the logging data of the adjacent wells; The double gamma curve while drilling is used to determine the layer to be fractured of the target horizontal well according to the high-quality fractured layer section and the original structure coal seam section in the work area where the target horizontal well is located.

3. The method according to claim 2, characterized in that The logging data of the adjacent wells include gamma data; The step of determining the high-quality fracturing layer section in the work area where the target horizontal well is located based on the well logging data of the adjacent wells and the gas logging total hydrocarbon data comprises: Using the gamma data, establishing a regional reservoir physical model of the work area where the target horizontal well is located; According to the regional reservoir physical model, the vertical coal seam structure of the work area where the target horizontal well is located is obtained; According to the vertical coal seam structure and the total hydrocarbon value of the gas logging, the high-quality fracturing layer section of the work area where the target horizontal well is located is determined.

4. The method according to claim 2, characterized in that: The logging data of the adjacent wells include resistivity data and acoustic wave time difference data; Determining the original structure coal seam section of the work area where the target horizontal well is located based on the well logging data of the adjacent wells includes: Using the resistivity data and the acoustic time difference data, a regional reservoir coal body structure development model of the work area where the target horizontal well is located is established; According to the regional reservoir coal body structure development model, the vertical coal body structure of the work area where the target horizontal well is located is obtained; According to the vertical coal body structure, the original structure coal seam section of the work area where the target horizontal well is located is determined.

5. The method according to claim 2, characterized in that: The method of using the dual gamma curve while drilling to determine the layer to be fractured of the target horizontal well according to the high-quality fractured layer section and the original structure coal seam section in the work area where the target horizontal well is located includes: Determining the relative position of the well trajectory of the target horizontal well in the coal seam according to the dual gamma curve while drilling; According to the relative position, the layer to be fractured of the target horizontal well is determined in the high-quality fracturing layer section or the original structure coal seam section in the work area where the target horizontal well is located.

6. The method according to claim 1, characterized in that The method of using the production casing collar data and determining the fracturing points in the to-be-fractured layer of the target horizontal well according to the established model of the relationship between the fracturing point spacing and the fracture overlap comprises: Determining the spacing between fracturing points according to the relationship model between the spacing between fracturing points and the overlap of fractures and the fracturing scale of the target horizontal well; Determining a plurality of fracturing points in the to-be-fractured layer of the target horizontal well according to the spacing between the fracturing points; The multiple fracturing points are adjusted by using the production casing collar data so that the distance between any fracturing point and the casing collar is greater than a preset length threshold, thereby obtaining a final fracturing point.

7. The method according to claim 1, characterized in that The relationship model between the fracturing point spacing and the fracture overlap is established in the following manner: Based on the acquired fracture monitoring test data in different structural areas, the fracture distribution after various fracturing stimulations is obtained; According to the distribution of the fractures after the multiple fracturing transformations, a relationship model between the fracturing point spacing and the fracture overlap is established.

8. A fracturing device for a coalbed methane horizontal well, characterized in that: The device comprises: An acquisition module is used to acquire drilling parameter information of a target horizontal well and logging data of adjacent wells of the target horizontal well; wherein the drilling parameter information of the target horizontal well at least includes gamma ray data while drilling, total hydrocarbon data of gas logging, and production casing collar data; A first determination module is used to determine the to-be-fractured layer of the target horizontal well according to the gamma ray data while drilling, the gas logging total hydrocarbon data, and the logging data of the adjacent wells; The second determination module is used to determine the fracturing points in the to-be-fractured layer of the target horizontal well by using the production casing collar data and according to the established model of the relationship between the spacing between fracturing points and the overlap of fractures; wherein the model of the relationship between the spacing between fracturing points and the overlap of fractures is used to represent the overlap relationship between the spacing between fracturing points and fractures under different fracturing scales; A fracturing module is used to perform fracturing on the target horizontal well according to the fracturing point.

9. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the method according to any one of claims 1 to 7 when running the program.

10. A storage medium for storing a computer-readable program, wherein when the computer-readable program is executed, the method according to any one of claims 1 to 7 is executed.

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