Fracturing method, device and readable storage medium for oil and gas reservoirs

Abstract

This application discloses a fracturing method, apparatus, and readable storage medium for oil and gas reservoirs, relating to the field of oil well fracturing technology. The fracturing method for oil and gas reservoirs includes: acquiring reservoir information; determining the corresponding interval information based on the reservoir information; determining the corresponding perforation parameters based on the interval information; acquiring the displacement parameters and shut-in time parameters of the oil and gas reservoir, and acquiring the corresponding fracturing fluid and proppant; and performing fracturing operations on the oil and gas reservoir based on the interval information, perforation parameters, displacement parameters, shut-in time parameters, fracturing fluid, and proppant. This application reduces the fracturing cost of oil and gas reservoirs while increasing their production capacity.

Description

Technical Field

[0001] This application relates to the field of oil well fracturing technology, and in particular to a fracturing method, apparatus and readable storage medium for oil and gas reservoirs. Background Technology

[0002] Currently, the development of deep buried hill reservoirs typically involves drilling vertical / directional wells into the buried hill reservoir and then connecting the natural fractures through fracturing to achieve production. As buried hill reservoir development progresses into later stages and the well network becomes increasingly dense, the vertical / directional well approach is no longer sufficient. Therefore, horizontal wells are being used to extract production from buried hill reservoirs. Horizontal wells in deep buried hill reservoirs are considered unconventional oil and gas reservoirs. Their oil storage space is primarily within natural fractures, and without fracturing, production is often minimal or nonexistent. However, due to their greater vertical depth and denser reservoir lithology, the lithological fracturing pressure gradient is often 15-30% higher than in sandstone reservoirs, making fracturing more difficult and costly. Therefore, current fracturing methods for oil and gas reservoirs face technical challenges, including high fracturing costs. Summary of the Invention

[0003] This application provides a fracturing method, apparatus, and readable storage medium for oil and gas reservoirs, which addresses the technical problem of high fracturing costs in the prior art.

[0004] A first aspect of this application provides a fracturing method for an oil and gas reservoir, comprising:

[0005] Obtain reservoir information of oil and gas reservoirs;

[0006] Based on reservoir information, determine the corresponding stratigraphic segment information of the oil and gas layer;

[0007] Based on the stratigraphic information, determine the perforation parameters corresponding to the oil and gas reservoir;

[0008] Obtain the displacement parameters and shut-in time parameters of the oil and gas reservoir, and obtain the corresponding fracturing fluid and proppant for the oil and gas reservoir;

[0009] Based on the information of the formation, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant, fracturing operations are carried out on the oil and gas reservoir.

[0010] The fracturing method for oil and gas reservoirs in this embodiment is based on layer information, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant to carry out fracturing work on oil and gas reservoirs, which reduces the difficulty of fracturing and stimulation of oil and gas reservoirs, and thus reduces the cost of fracturing oil and gas reservoirs.

[0011] A second aspect of this application provides a fracturing apparatus for oil and gas reservoirs, comprising:

[0012] Acquisition unit, used to acquire reservoir information of oil and gas reservoirs;

[0013] The processing unit is used to determine the segment information corresponding to the oil and gas layer based on the reservoir information.

[0014] The processing unit is also used to determine the perforation parameters corresponding to the oil and gas reservoir based on the layer information;

[0015] The acquisition unit is also used to acquire the displacement parameters and shut-in time parameters of the oil and gas reservoir, as well as the fracturing fluid and proppant corresponding to the oil and gas reservoir;

[0016] The control unit is used to perform fracturing operations on oil and gas reservoirs based on formation information, perforation parameters, displacement parameters, shut-in time parameters, fracturing fluid, and proppant.

[0017] The fracturing device for oil and gas reservoirs in this embodiment performs fracturing operations on oil and gas reservoirs based on layer information, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid, and proppant, thereby reducing the difficulty of fracturing and transformation of oil and gas reservoirs and thus reducing the cost of fracturing oil and gas reservoirs.

[0018] A third aspect of this application provides another fracturing apparatus for oil and gas reservoirs, including a processor and a memory. The memory stores a computer program, which, when executed by the processor, implements the steps of the fracturing method for oil and gas reservoirs as described in any of the above embodiments. Therefore, this fracturing apparatus for oil and gas reservoirs possesses all the beneficial effects of the fracturing method for oil and gas reservoirs in any of the above embodiments, which will not be elaborated further here.

[0019] A fourth aspect of this application provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the fracturing method for oil and gas reservoirs as described in any of the above embodiments. Therefore, this readable storage medium possesses all the beneficial effects of the fracturing method for oil and gas reservoirs as described in any of the above embodiments, which will not be elaborated further here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart of a fracturing method for oil and gas reservoirs provided in the embodiments of this application;

[0022] Figure 2 A schematic diagram of a fracturing method for oil and gas reservoirs provided in an embodiment of this application;

[0023] Figure 3A functional block diagram of a fracturing apparatus for oil and gas reservoirs provided in the embodiments of this application;

[0024] Figure 4 This is a structural block diagram of a fracturing apparatus for oil and gas reservoirs provided in an embodiment of this application. Detailed Implementation

[0025] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0026] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0027] In some embodiments, such as Figure 1 As shown, an embodiment of this application provides a fracturing method for an oil and gas reservoir, comprising:

[0028] Step S101: Obtain reservoir information of the oil and gas reservoir;

[0029] Step S102: Determine the segment information corresponding to the oil and gas layer based on the reservoir information;

[0030] Step S103: Determine the perforation parameters corresponding to the oil and gas reservoir based on the layer information;

[0031] Step S104: Obtain the displacement parameters and well shut-in time parameters of the oil and gas reservoir, and obtain the fracturing fluid and proppant corresponding to the oil and gas reservoir;

[0032] Step S105: Based on the layer information, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant, fracturing work is carried out on the oil and gas reservoir.

[0033] In this embodiment, a fracturing method for oil and gas reservoirs is proposed. The oil and gas reservoir is a formation containing oil and natural gas. Fracturing refers to a method of creating fractures in the oil and gas reservoir by using hydraulic action during the oil or gas extraction process.

[0034] For example, the oil and gas reservoir can be the formation in a horizontal well of a deep buried hill oil reservoir.

[0035] Obtain reservoir information of oil and gas reservoirs, where reservoir information is the basic information of reservoirs in oil and gas reservoirs.

[0036] For example, reservoir information may include data such as logging, logging while drilling, and stress.

[0037] Based on the reservoir information, the oil and gas layer is segmented to obtain the corresponding segment information, where the segment information is the information of each segment after the oil and gas layer is segmented.

[0038] For example, based on reservoir information, the oil and gas layer is segmented in the horizontal direction to obtain the segment information corresponding to the oil and gas layer.

[0039] Based on the stratigraphic information, the perforation parameters corresponding to the oil and gas reservoir are determined. The perforation parameters are the basic parameters of the perforations in the oil and gas reservoir.

[0040] Obtain the displacement parameters and well shut-in time parameters of the oil and gas reservoir, and obtain the corresponding fracturing fluid and proppant for the oil and gas reservoir.

[0041] Among them, the displacement parameter is the fracturing displacement parameter of the oil and gas reservoir, the shut-in time parameter is the shut-in time before the blowout operation, the fracturing fluid is the solution used for fracturing operations of the oil and gas reservoir, and the proppant is the solution to improve the pressure resistance of the oil and gas reservoir.

[0042] Based on the information of the formation, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant, fracturing operations are carried out on the oil and gas reservoir.

[0043] It should be noted that this embodiment employs different segmentation methods, perforation methods, fracturing fluid designs, proppant designs, displacement rates, and well shut-in designs, which can achieve fracturing stimulation of oil and gas reservoirs, reduce the difficulty of fracturing stimulation of oil and gas reservoirs, and thus reduce the cost of fracturing oil and gas reservoirs.

[0044] The fracturing method for oil and gas reservoirs in this embodiment is based on layer information, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant to carry out fracturing work on oil and gas reservoirs, which reduces the difficulty of fracturing and stimulation of oil and gas reservoirs, and thus reduces the cost of fracturing oil and gas reservoirs.

[0045] In some embodiments, this application provides a fracturing method for oil and gas reservoirs to obtain reservoir information, including:

[0046] Step S201: Data acquisition is performed on the oil and gas reservoir to obtain the reservoir's production capacity data and stress data;

[0047] Step S202: Determine crack parameters based on production capacity data and stress data.

[0048] In this embodiment, data is collected from the oil and gas reservoir to obtain its production capacity data and stress data. The production capacity data represents the production capacity of the oil and gas reservoir, and the stress data represents the stress of the oil and gas reservoir.

[0049] Reservoir information includes fracture parameters, which represent the basic information about fractures in the oil and gas reservoir. The fracture parameters are determined based on production capacity data and stress data.

[0050] For example, the first step is to collect basic reservoir parameters. Horizontal sections are then segmented using data from well logging, drilling logging, and stress analysis. Based on reservoir productivity data and relevant stress data, the design number of fractures and fracture lengths for each section are determined. Since buried hill reservoirs are fractured reservoirs, they often cannot form a fracture network. To meet productivity requirements, the number of fractures needed determines whether temporary plugging with a ball is necessary and the number of times such plugging can be performed, thus satisfying the need to create multiple fractures.

[0051] In some embodiments, this application provides a fracturing method for oil and gas reservoirs, which determines the corresponding segment information of the oil and gas reservoir based on reservoir information, including:

[0052] Step S301: Based on the fracture pressure gradient, the oil and gas reservoir is segmented to obtain multiple reservoir segments.

[0053] Step S302: Collect information from multiple reservoir segments to obtain segment information.

[0054] In this embodiment, the reservoir information includes a fracture pressure gradient, which represents the variation of fracture pressure in the oil and gas reservoir.

[0055] Based on the fracture pressure gradient, the oil and gas reservoir is segmented to obtain multiple reservoir segments.

[0056] For example, the segments are divided according to the principle that the rupture pressure gradient is approximately the same.

[0057] Information from multiple reservoir segments is collected to obtain segment information.

[0058] In some embodiments, this application provides a fracturing method for oil and gas reservoirs, which determines the perforation parameters corresponding to the oil and gas reservoir based on the reservoir segment information, including:

[0059] Step S401: Determine the segment length based on the segment information;

[0060] Step S402: Determine the perforation length and number of perforations based on the layer length.

[0061] In this embodiment, the perforation parameters include perforation length and perforation number, where perforation length represents the length of the perforation and perforation number represents the number of perforations.

[0062] Based on the layer information, determine the layer length, and then based on the layer length, determine the perforation length and number of perforations.

[0063] For example, the perforation process involves cluster perforation in the sweet spot area shown by logging and well logging, with each cluster being 1-3m long, resulting in 16 holes / m. Where conditions permit, deep-penetrating perforations can be used. The perforation length of each segment is 12-24m. Longer perforation lengths and a larger number of holes can reduce perforation friction and reduce the difficulty of fracturing.

[0064] In some embodiments, this application provides a fracturing method for an oil and gas reservoir to obtain reservoir displacement parameters, including:

[0065] Step S501: Obtain the displacement threshold corresponding to the oil and gas reservoir;

[0066] Step S502: Determine the displacement parameters based on the displacement threshold.

[0067] In this embodiment, the displacement threshold corresponding to the oil and gas reservoir is obtained, and the displacement parameter is determined based on the displacement threshold, wherein the displacement threshold is a preset threshold.

[0068] For example, the displacement threshold can be 9 cubic meters per minute. Fracturing deep buried hill horizontal wells is difficult, and the purpose of fracturing is to connect natural fractures. A larger displacement increases the probability of connecting natural fractures; therefore, the fracturing displacement should be greater than 9 cubic meters per minute. The displacement should be adjusted according to the actual wellbore pressure conditions.

[0069] In some embodiments, this application provides a fracturing method for an oil and gas reservoir, which obtains fracturing fluid corresponding to the oil and gas reservoir, including:

[0070] Step S601: Mix guar gum, thickener and acid-base regulator to obtain fracturing fluid.

[0071] In this embodiment, fracturing fluid can be obtained by mixing guar gum, thickener, and acid-base regulator.

[0072] For example, to reduce the difficulty of horizontal well stimulation in deep buried hills, acid is pre-filled before formal fracturing. The acid formula can be prepared based on experiments with acid and buried hill reservoir cores and completion mud. Generally, 10% to 15% hydrochloric acid or soil acid is selected, and the acid volume is 10-30 cubic meters. It can be optimized and adjusted according to the difficulty of block stimulation and previous fracturing data. The acid discharge rate is 2-4 cubic meters / min. After adding the acid, active water (containing 0.1% to 0.5% KCl) should be used to displace the acid into the formation. The displacement amount is calculated based on the wellbore volume. The fracturing fluid selected is guar gum, with a thickener of 0.3%–0.45% and a pH adjuster of 0.03%–0.04%, adjusted according to reservoir depth. The deeper the vertical depth, the higher the concentration. Optimizing the horizontal section design from far to near can reduce fracturing difficulty and save fracturing fluid costs. The crosslinking agent is 0.1%–0.2%, and the anti-swelling agent, bactericide, flow aid, defoamer, and breaker are adjusted according to actual conditions. Simultaneously optimizing the drag-reducing agent content can significantly reduce frictional resistance during fracturing, thereby reducing the difficulty of fracturing stimulation and the cost of the fracturing unit.

[0073] In some embodiments, this application provides a fracturing method for an oil and gas reservoir, which obtains proppant corresponding to the oil and gas reservoir, including:

[0074] Step S701: Obtain the closure pressure parameters of the oil and gas reservoir;

[0075] Step S702: Determine the proppant based on the closure pressure parameters.

[0076] In this embodiment, the closure pressure parameter of the oil and gas reservoir is obtained. The closure pressure parameter represents the pressure situation in the oil and gas reservoir. Based on the closure pressure parameter, the proppant is determined.

[0077] For example, due to the high fracture pressure gradient and high closure pressure in deep buried hill horizontal wells, high-pressure resistant ceramic proppant should be selected as the main component, with 69MPa or 86MPa proppant chosen based on actual needs. To reduce fracturing costs, quartz sand of the same mesh size can be mixed into the ceramic proppant intermittently. During the pre-fluidization stage, 0.212-0.106mm ceramic proppant is used to grind the perforations and support the distal microfractures. In the first half of the fracturing and proppant-carrying stage, 0.212-0.106mm or 0.425-0.212mm proppant is used, while in the second half, 0.425-0.212mm or 0.85-0.425mm proppant is used. The proportion of each proppant is optimized and adjusted according to the vertical depth of the reservoir; the deeper the vertical depth and the higher the closure pressure gradient, the higher the proportion of fine proppant and the lower the proportion of quartz sand.

[0078] For example, such as Figure 2As shown in Table 1, 20 cubic meters of acid were pumped at a flow rate of 2 cubic meters at the very front of the pre-flush fluid to reduce the pressure during subsequent fracturing operations. Following this, 40 cubic meters of active water (one displacement volume) was pumped in to block the acid from the guar gum, thus preventing guar gum breakage and affecting its fracture-forming performance. Two slugs were used in the pre-flush stage with sand ratios of 5% and 7%, respectively. The sand ratio was increased gradually from low to high to grind the pores and support distal fractures or natural micro-fractures, reducing the difficulty of adding sand later. During the sand-carrying fluid stage, the sand ratio was gradually increased to increase the fracture width and reduce the difficulty of operation. Simultaneously, attention was paid to pressure changes during operation to ensure successful completion.

[0079] Table 1

[0080]

[0081]

[0082] For example, as shown in Table 2, before the pitch is temporarily blocked, the attached Figure 1 The basic idea is the same: after the ball is thrown to temporarily block the block, the ball is sent to the block using slippery water. The pre-filled liquid does not use acid or active water, but is directly injected into the guar gum to create the gap and in the later sand-carrying and replacement stage.

[0083] Table 2

[0084]

[0085]

[0086]

[0087] In some embodiments, such as Figure 2 As shown, an embodiment of this application provides a fracturing apparatus 800 for an oil and gas reservoir, comprising:

[0088] Acquisition unit 802 is used to acquire reservoir information of oil and gas reservoirs;

[0089] Processing unit 804 is used to determine the segment information corresponding to the oil and gas layer based on the reservoir information;

[0090] The processing unit 804 is also used to determine the perforation parameters corresponding to the oil and gas reservoir based on the layer information;

[0091] The acquisition unit 802 is also used to acquire the displacement parameters and well shut-in time parameters of the oil and gas reservoir, as well as the fracturing fluid and proppant corresponding to the oil and gas reservoir;

[0092] The control unit 806 is used to perform fracturing operations on oil and gas reservoirs based on formation information, perforation parameters, displacement parameters, shut-in time parameters, fracturing fluid, and proppant.

[0093] In this embodiment, a fracturing device 800 for an oil and gas reservoir is proposed. The oil and gas reservoir is a formation containing oil and natural gas. Fracturing refers to a method of creating fractures in an oil and gas reservoir by using hydraulic action during the oil or gas extraction process.

[0094] For example, the oil and gas reservoir can be the formation in a horizontal well of a deep buried hill oil reservoir.

[0095] Obtain reservoir information of oil and gas reservoirs, where reservoir information is the basic information of reservoirs in oil and gas reservoirs.

[0096] For example, reservoir information may include data such as logging, logging while drilling, and stress.

[0097] Based on the reservoir information, the oil and gas layer is segmented to obtain the corresponding segment information, where the segment information is the information of each segment after the oil and gas layer is segmented.

[0098] For example, based on reservoir information, the oil and gas layer is segmented in the horizontal direction to obtain the segment information corresponding to the oil and gas layer.

[0099] Based on the stratigraphic information, the perforation parameters corresponding to the oil and gas reservoir are determined. The perforation parameters are the basic parameters of the perforations in the oil and gas reservoir.

[0100] Obtain the displacement parameters and well shut-in time parameters of the oil and gas reservoir, and obtain the corresponding fracturing fluid and proppant for the oil and gas reservoir.

[0101] Among them, the displacement parameter is the fracturing displacement parameter of the oil and gas reservoir, the shut-in time parameter is the shut-in time before the blowout operation, the fracturing fluid is the solution used for fracturing operations of the oil and gas reservoir, and the proppant is the solution to improve the pressure resistance of the oil and gas reservoir.

[0102] Based on the information of the formation, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid and proppant, fracturing operations are carried out on the oil and gas reservoir.

[0103] It should be noted that this embodiment employs different segmentation methods, perforation methods, fracturing fluid designs, proppant designs, displacement rates, and well shut-in designs, which can achieve fracturing stimulation of oil and gas reservoirs, reduce the difficulty of fracturing stimulation of oil and gas reservoirs, and thus reduce the cost of fracturing oil and gas reservoirs.

[0104] The fracturing device 800 for oil and gas reservoirs in this embodiment performs fracturing operations on oil and gas reservoirs based on layer information, perforation parameters, displacement parameters, well shut-in time parameters, fracturing fluid, and proppant, thereby reducing the difficulty of fracturing and transformation of oil and gas reservoirs and thus reducing the cost of fracturing oil and gas reservoirs.

[0105] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0106] The processing unit 804 is also used to collect data on the oil and gas reservoir to obtain the reservoir's production capacity data and stress data.

[0107] The processing unit 804 is also used to determine crack parameters based on production capacity data and stress data.

[0108] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0109] The processing unit 804 is also used to segment the oil and gas reservoir according to the fracture pressure gradient to obtain multiple reservoir segments.

[0110] The processing unit 804 is also used to collect information from multiple reservoir segments to obtain segment information.

[0111] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0112] The processing unit 804 is also used to determine the segment length based on the segment information;

[0113] The processing unit 804 is also used to determine the perforation length and the number of perforations based on the layer length.

[0114] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0115] Processing unit 804 is also used to obtain the displacement threshold corresponding to the oil and gas reservoir;

[0116] The processing unit 804 is also used to determine displacement parameters based on the displacement threshold.

[0117] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0118] The control unit 806 is also used to mix guar gum, thickener and acid-base regulator to obtain fracturing fluid.

[0119] In some embodiments of this application, a fracturing apparatus 800 for an oil and gas reservoir is provided, further comprising:

[0120] The acquisition unit 802 is also used to acquire the closure pressure parameters of the oil and gas reservoir;

[0121] The acquisition unit 802 is also used to determine the proppant based on the closure pressure parameters.

[0122] In some embodiments, such as Figure 3As shown, a fracturing apparatus 900 for oil and gas reservoirs is proposed. The fracturing apparatus 900 includes a processor 902 and a memory 904. The memory 904 stores a computer program, which, when executed by the processor 902, implements the steps of the fracturing method for oil and gas reservoirs as described in any of the above embodiments. Therefore, the fracturing apparatus 900 for oil and gas reservoirs possesses all the beneficial effects of the fracturing method for oil and gas reservoirs in any of the above embodiments, which will not be elaborated further here.

[0123] In some embodiments, a readable storage medium is provided having a program stored thereon, which, when executed by a processor, implements the steps of the fracturing method for oil and gas reservoirs as described in any of the above embodiments, and thus has all the beneficial technical effects of the fracturing method for oil and gas reservoirs as described in any of the above embodiments.

[0124] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0125] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0126] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. 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 computer, 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, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0127] 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.

[0128] 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 The steps of the function specified in one or more boxes.

[0129] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to execute a fracturing method for oil and gas reservoirs.

[0130] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0131] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0133] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0134] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0135] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0136] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0137] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0138] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A fracturing method for an oil and gas reservoir, characterized in that, The method includes: Obtain reservoir information of oil and gas reservoirs; Based on the reservoir information, determine the segment information corresponding to the oil and gas layer; Based on the layer information, determine the perforation parameters corresponding to the oil and gas reservoir; Obtain the displacement parameters and well shut-in time parameters of the oil and gas reservoir, and obtain the fracturing fluid and proppant corresponding to the oil and gas reservoir; Based on the layer information, the perforation parameters, the displacement parameters, the well shut-in time parameters, the fracturing fluid, and the proppant, fracturing operations are carried out on the oil and gas reservoir.

2. The method according to claim 1, characterized in that, The reservoir information includes fracture parameters, and obtaining the reservoir information of the oil and gas reservoir includes: Data is collected from the oil and gas reservoir to obtain its production capacity and stress data. The crack parameters are determined based on the production capacity data and the stress data.

3. The method according to claim 1, characterized in that, The reservoir information includes a fracture pressure gradient, and determining the segment information corresponding to the oil and gas reservoir based on the reservoir information includes: Based on the fracture pressure gradient, the oil and gas reservoir is segmented to obtain multiple reservoir segments. Information from multiple reservoir segments is collected to obtain the segment information.

4. The method according to claim 1, characterized in that, The perforation parameters include perforation length and perforation number. Determining the perforation parameters corresponding to the oil and gas reservoir based on the layer information includes: Determine the segment length based on the segment information; The perforation length and the number of perforations are determined based on the length of the layer segment.

5. The method according to claim 1, characterized in that, Obtaining the displacement parameters of the oil and gas reservoir includes: Obtain the displacement threshold corresponding to the oil and gas reservoir; The displacement parameters are determined based on the displacement threshold.

6. The method according to any one of claims 1 to 5, characterized in that, Obtaining the fracturing fluid corresponding to the oil and gas reservoir includes: Guar gum, thickener, and acid-base regulator are mixed to obtain the fracturing fluid.

7. The method according to any one of claims 1 to 5, characterized in that, Obtaining the proppant corresponding to the oil and gas reservoir includes: Obtain the closure pressure parameters of the oil and gas reservoir; The proppant is determined based on the closure pressure parameters.

8. A fracturing device for an oil and gas reservoir, characterized in that, The device includes: Acquisition unit, used to acquire reservoir information of oil and gas reservoirs; The processing unit is used to determine the segment information corresponding to the oil and gas layer based on the reservoir information; The processing unit is further configured to determine the perforation parameters corresponding to the oil and gas reservoir based on the layer information; The acquisition unit is also used to acquire the displacement parameters and well shut-in time parameters of the oil and gas reservoir, and to acquire the fracturing fluid and proppant corresponding to the oil and gas reservoir; The control unit is used to perform fracturing operations on the oil and gas reservoir based on the layer information, the perforation parameters, the displacement parameters, the shut-in time parameters, the fracturing fluid, and the proppant.

9. A fracturing device for an oil and gas reservoir, characterized in that, include: processor; A memory containing programs or instructions, wherein a processor, when executing the programs or instructions in the memory, implements the steps of the fracturing method for oil and gas reservoirs as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that, A program or instruction is stored on a readable storage medium, which, when executed by a processor, implements the steps of the fracturing method for oil and gas reservoirs as described in any one of claims 1 to 7.

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