Method, device and computer storage medium for selecting fracturing horizon

Abstract

The embodiment of the application discloses a fracturing layer position selection method and device and a computer storage medium, and belongs to the technical field of oil and gas exploitation. The method comprises the following steps: acquiring a fracturing construction curve of a target fracturing well, geological factors of a position where the target fracturing well is located and construction data of the target fracturing well; determining an influence of the geological factors on a fracturing effect of the target fracturing well according to the fracturing construction curve, the construction data and the geological factors; and selecting a fracturing layer position in the target fracturing well according to a layer selection rule according to the influence of the geological factors on the fracturing effect of the target fracturing well. The embodiment of the application determines the influences of different geological factors on the fracturing effect, thereby more reasonably selecting the fracturing layer position, improving the difference of fracture expansion in the same fracturing layer section, making the fracturing reconstruction effect better, maximizing the reservoir exploitation, and further improving the yield.

Description

Technical Field

[0001] This application relates to the field of oil and gas extraction technology, and in particular to a method, apparatus and computer storage medium for selecting fracturing sites. Background Technology

[0002] Currently, some oil and gas reservoirs are characterized by numerous, thin, and poorly permeable reservoir layers. These characteristics lead to low production capacity, necessitating fracturing to increase output. However, due to the dispersed vertical distribution of reservoirs and the fact that multi-stage fracturing in each well only utilizes a portion of the well's reserves, the demand for efficient development cannot be met. Therefore, to maximize reservoir utilization and improve reservoir production, it is necessary to evaluate the post-fracturing effects of fracturing wells to optimize fracturing locations.

[0003] Currently, fracturing sites can usually be selected using well logging data and brittleness index. However, due to the large number of factors affecting fracturing, the fracture propagation of the same fracturing layer varies greatly. In other words, the fractures propagate unevenly, failing to effectively utilize the reservoir and thus not improving reservoir production. Summary of the Invention

[0004] This application provides a method, apparatus, and computer storage medium for selecting fracturing layers, which can solve the problem of insufficient reservoir production due to improper selection of fracturing layers. The technical solution is as follows:

[0005] On the one hand, a method for selecting fracturing sites is provided, the method comprising:

[0006] Obtain the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well;

[0007] Based on the fracturing construction curve, the construction data, and the geological factors, determine the impact of the geological factors on the fracturing effect of the target fracturing well;

[0008] Based on the influence of the geological factors on the fracturing effect of the target fracturing well, the fracturing layer in the target fracturing well is selected according to the layer selection rules.

[0009] In some embodiments, determining the impact of the geological factors on the fracturing effect of the target fracturing well based on the fracturing construction curve, the construction data, and the geological factors includes:

[0010] Based on the pre-fracturing fluid stage curve and the proppant-carrying fluid stage curve in the fracturing construction curve, the first fracturing effect on the target fracturing well is determined.

[0011] Based on the fracturing construction curve and the construction data, determine the second fracturing effect on the target fracturing well;

[0012] The first fracturing effect and the second fracturing effect are determined as the fracturing effect on the target fracturing well;

[0013] The influence of the geological factors on the fracturing effect of the target fracturing well was determined.

[0014] In some embodiments, determining the second fracturing effect on the target fracturing well based on the fracturing construction curve and the construction data includes:

[0015] Based on the fracturing construction curve, the net pressure is fitted using the reservoir lithology parameters, geostress parameters, and physical property parameters included in the construction data to obtain the fracture parameters;

[0016] The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters.

[0017] In some embodiments, the geological factors include sedimentary facies, geostress, and interlayers;

[0018] The determination of the impact of the geological factors on the fracturing effect of the target fracturing well includes:

[0019] Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively.

[0020] Based on the first fracture simulation diagram, determine the impact of the deposition relative to the fracturing effect;

[0021] Based on the second fracture simulation diagram, determine the influence of the in-situ stress on the fracturing effect;

[0022] The influence of the interlayer on the fracturing effect is determined based on the proppant-carrying fluid stage curve in the fracturing construction curve.

[0023] In some embodiments, after selecting the fracturing layer in the target fracturing well according to the layer selection rule based on the influence of the geological factors on the fracturing effect of the target fracturing well, the method further includes:

[0024] The selected fracturing layer will be indicated by a prompt message.

[0025] On the other hand, a fracturing site selection device is provided, the device comprising:

[0026] The acquisition module is used to acquire the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well.

[0027] The determination module is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well based on the fracturing construction curve, the construction data, and the geological factors.

[0028] The selection module is used to select the fracturing layer in the target fracturing well according to the layer selection rules based on the influence of the geological factors on the fracturing effect of the target fracturing well.

[0029] In some embodiments, the determining module includes:

[0030] The first determining submodule is used to determine the first fracturing effect on the target fracturing well based on the pre-fracturing fluid stage curve and the proppant-carrying fluid stage curve in the fracturing construction curve.

[0031] The second determining submodule is used to determine the second fracturing effect on the target fracturing well based on the fracturing construction curve and the construction data;

[0032] The third determining submodule is used to determine the first fracturing effect and the second fracturing effect as the fracturing effect on the target fracturing well;

[0033] The fourth determination submodule is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well.

[0034] In some embodiments, the second determining submodule is used to:

[0035] Based on the fracturing construction curve, the net pressure is fitted using the reservoir lithology parameters, geostress parameters, and physical property parameters included in the construction data to obtain the fracture parameters;

[0036] The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters.

[0037] In some embodiments, the geological factors include sedimentary facies, geostress, and interlayers;

[0038] The fourth determining submodule is used for:

[0039] Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively.

[0040] Based on the first fracture simulation diagram, determine the impact of the deposition relative to the fracturing effect;

[0041] Based on the second fracture simulation diagram, determine the influence of the in-situ stress on the fracturing effect;

[0042] The influence of the interlayer on the fracturing effect is determined based on the proppant-carrying fluid stage curve in the fracturing construction curve.

[0043] In some embodiments, the apparatus further includes:

[0044] The prompt module is used to provide prompts for the selected fracturing layer through prompt messages.

[0045] On the other hand, a computer program product containing instructions is provided that, when run on a computer, causes the computer to perform the fracturing layer selection method described above.

[0046] The beneficial effects of the technical solutions provided in this application include at least the following:

[0047] In the embodiments of this application, after determining the fracturing effect of the target fracturing well, the influence of different geological factors on the fracturing effect can be determined, thereby making more reasonable selection of fracturing layers, improving the difference in fracture propagation in the same fracturing layer, making the fracturing effect better, maximizing reservoir utilization, and further increasing production. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a flowchart of a fracturing layer selection method provided in an embodiment of this application;

[0050] Figure 2 This is a flowchart of another fracturing layer selection method provided in an embodiment of this application;

[0051] Figure 3 This is a simulation diagram of a first crack provided in an embodiment of this application;

[0052] Figure 4 This application provides a hydraulic fracturing construction curve for Hunan province.

[0053] Figure 5 This is a simulation diagram of a second crack provided in an embodiment of this application;

[0054] Figure 6 This is a fracturing operation curve provided in an embodiment of this application;

[0055] Figure 7 This is a schematic diagram of the structure of a fracturing layer selection device provided in an embodiment of this application;

[0056] Figure 8 This is a schematic diagram of the structure of a determining module provided in an embodiment of this application;

[0057] Figure 9 This is a schematic diagram of another fracturing layer selection device provided in an embodiment of this application;

[0058] Figure 10 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0060] Before providing a detailed explanation of the embodiments of this application, the application scenarios of the embodiments of this application will be described first.

[0061] Because some oil and gas reservoirs are not concentrated vertically after fracturing, multi-stage fracturing in each well only utilizes 50%-80% of the total well section's reserves. This results in some areas not meeting the needs for profitable development under current technological conditions. Therefore, fracturing sites are usually optimized from a geological perspective to maximize reservoir utilization. However, wells with similar physical properties still have significant differences in production. Simply relying on logging data and brittleness index to select fracturing sites is not enough to effectively utilize the reservoir.

[0062] Based on this application scenario, this application provides a method for selecting fracturing layers to improve fracturing effect.

[0063] Figure 1 This is a flowchart illustrating a method for selecting fracturing layers according to an embodiment of this application. The method for selecting fracturing layers may include the following steps:

[0064] Step 101: Obtain the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well.

[0065] Step 102: Based on the fracturing construction curve, the construction data, and the geological factors, determine the impact of the geological factors on the fracturing effect of the target fracturing well.

[0066] Step 103: Based on the influence of this geological factor on the fracturing effect of the target fracturing well, select the fracturing layer in the target fracturing well according to the layer selection rules.

[0067] In the embodiments of this application, after determining the fracturing effect of the target fracturing well, the influence of different geological factors on the fracturing effect can be determined, thereby making more reasonable selection of fracturing layers, improving the difference in fracture propagation in the same fracturing layer, making the fracturing effect better, maximizing reservoir utilization, and further increasing production.

[0068] In some embodiments, the impact of the geological factors on the fracturing effect of the target fracturing well is determined based on the fracturing construction curve, the construction data, and the geological factors, including:

[0069] Based on the pre-fracturing fluid stage curve and the prop-carrying fluid stage curve in the fracturing construction curve, the first fracturing effect of the target fracturing well is determined.

[0070] Based on the fracturing construction curve and the construction data, the secondary fracturing effect on the target fracturing well is determined;

[0071] The first fracturing effect and the second fracturing effect are defined as the fracturing effect on the target fracturing well;

[0072] Determine the impact of this geological factor on the fracturing effect of the target fracturing well.

[0073] In some embodiments, determining the second fracturing effect on the target fracturing well based on the fracturing construction curve and the construction data includes:

[0074] Based on the fracturing operation curve, the net pressure is fitted using the reservoir lithology parameters, geostress parameters, and physical property parameters included in the operation data to obtain the fracture parameters;

[0075] The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters.

[0076] In some embodiments, the geological factors include sedimentary facies, geostress, and interlayers;

[0077] Determine the impact of this geological factor on the fracturing effect of the target fracturing well, including:

[0078] Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively.

[0079] Based on the simulation diagram of the first fracture, determine the impact of the deposition on the fracturing effect;

[0080] Based on the simulation diagram of the second fracture, the influence of the in-situ stress on the fracturing effect was determined;

[0081] Based on the proppant-carrying fluid stage curve in the fracturing operation curve, the influence of the interlayer on the fracturing effect is determined.

[0082] In some embodiments, after selecting the fracturing layer in the target fracturing well according to the layer selection rule based on the influence of the geological factors on the fracturing effect of the target fracturing well, the method further includes:

[0083] The selected fracturing layer will be indicated by a prompt message.

[0084] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of this application, and the embodiments of this application will not be described in detail one by one.

[0085] Figure 2 This is a flowchart illustrating a method for selecting fracturing layers according to an embodiment of this application. This embodiment uses the application of this fracturing layer selection method in a terminal as an example for illustration. The method for selecting fracturing layers may include the following steps:

[0086] Step 201: The terminal acquires the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well.

[0087] As an example, when a terminal receives an acquisition command, it can acquire the fracturing operation curve of the target fracturing well, which can describe the changes of various parameters in the target fracturing well during the fracturing operation.

[0088] It should be noted that this acquisition command is triggered by the user through a specified operation, which can be a click, swipe, input, etc.

[0089] In some embodiments, geological factors may include sedimentary facies, geostress, interlayers, etc., and construction data may include well location, stratigraphic position, perforated well section, proppant pressure, average displacement, absorption index, number of fracturing operations, fracturing fluid volume, etc.

[0090] Step 202: The terminal determines the impact of geological factors on the fracturing effect of the target fracturing well based on the fracturing construction curve, construction data and the geological factors.

[0091] Since geological factors will affect fracture propagation during fracturing operations, in order to more accurately select the optimal formation and realize larger-scale fracturing stimulation and utilization of the reservoir, the terminal determines the impact of geological factors on the fracturing effect of the target fracturing well based on the fracturing operation curve, operation data and the geological factors.

[0092] As an example, the operation of determining the impact of geological factors on the fracturing effect of a target fracturing well based on fracturing operation curves, operation data, and geological factors includes at least the following: determining the first fracturing effect on the target fracturing well based on the pre-fracturing fluid stage curve and the proppant-carrying fluid stage curve in the fracturing operation curve; determining the second fracturing effect on the target fracturing well based on the fracturing operation curves and operation data; determining the first fracturing effect and the second fracturing effect as the fracturing effect on the target fracturing well; and determining the impact of geological factors on the fracturing effect of the target fracturing well.

[0093] Since the pre-flush stage involves injecting a small volume of fluid into the formation to assess the patency of the downhole tubing and the formation's absorption capacity, the flow rate is increased to generate sufficient pressure at the bottom of the well, causing fractures to form. The proppant-carrying stage occurs after fractures have formed, where the fracturing fluid carries a certain amount of proppant into the fractured formation. Therefore, both the pre-flush and proppant-carrying stages have a significant impact on fractures. Thus, by analyzing the pre-flush and proppant-carrying stage curves in the fracturing operation curve, the initial fracturing effect on the target well can be determined.

[0094] In some embodiments, the pre-flush stage curve can represent the relationship between displacement and pressure, and the proppant-carrying fluid stage curve can represent the relationship between proppant ratio and pressure when the displacement is relatively stable. Different relationships correspond to different fracturing effects. Therefore, the terminal can store multiple relationships between displacement, pressure, and proppant ratio, as well as the first fracturing effect corresponding to each relationship in advance. When the terminal determines the first fracturing effect for the target fracturing well based on the pre-flush stage curve and the proppant-carrying fluid stage curve in the fracturing construction curve, it matches the relationships between displacement, pressure, and proppant ratio reflected in the pre-flush stage curve and the proppant-carrying fluid stage curve in the fracturing construction curve with multiple stored relationships between displacement, pressure, and proppant ratio to determine the first fracturing effect corresponding to the matched relationship.

[0095] It should be noted that the first fracturing effect corresponding to each stored relationship includes: The pre-flush stage curve shows that after the flow rate reaches a certain value, the formation fracturing pressure decreases. Subsequently, as the flow rate increases, the pressure increases with the flow rate, or after the flow rate reaches a certain value, the pressure rises to the formation fracturing pressure and then decreases significantly. This indicates that the reservoir has strong brittleness, significant fracturing, and the formation of fractures of a certain scale, representing a relatively ideal construction curve characteristic. The proppant-carrying fluid stage curve shows that: with a stable flow rate and a constant or increased proppant ratio, the pump pressure continuously decreases. This indicates poor fracture extension and a short fracture length. If the flow rate is stable, the proppant ratio remains constant, or the proppant ratio is increased, the pressure continuously rises, indicating difficulty in proppant delivery and a high risk of sand plugging.

[0096] In some embodiments, the operation of determining the second fracturing effect on the target fracturing well based on the fracturing construction curve and construction data includes the following operations: on the basis of the fracturing construction curve, the net pressure is fitted by the reservoir lithology parameters, geostress parameters and physical property parameters included in the construction data to obtain fracture parameters; and the second fracturing effect on the target fracturing well is determined based on the fracture parameters.

[0097] It should be noted that lithological parameters can include reservoir porosity, density, sandstone and mudstone content, etc., geostress parameters include the magnitude of vertical principal stress, the magnitude of maximum horizontal principal stress, the magnitude of minimum horizontal principal stress, the direction of maximum horizontal principal stress, etc., and physical property parameters include porosity, permeability, skin coefficient, heterogeneity coefficient, etc.

[0098] As an example, the terminal can use FracPT software to set up pump sections based on the reservoir's lithology, geostress, and physical properties, and perform net pressure fitting on the fracturing construction curve to obtain fracture parameters and quantitatively determine the secondary fracturing effect.

[0099] It is worth noting that the terminal qualitatively determines the first fracturing effect of the target fracturing well through the pre-fracturing fluid stage curve and the proppant-carrying fluid stage curve, and quantitatively determines the second fracturing effect of the target fracturing well through the construction data and fracturing construction curve. Since the fracturing effect of the target fracturing well is determined from different aspects, the accuracy of evaluating the fracturing effect of the target fracturing well is improved.

[0100] Since geological factors affect the fracturing effect of the target fracturing well, in order to select a more suitable fracturing layer, the terminal can determine the impact of geological factors on the fracturing effect of the target fracturing well.

[0101] As can be seen from the above, geological factors can include sedimentary facies, geostress, and interlayers. Therefore, the operation of determining the impact of geological factors on the fracturing effect of the target fracturing well includes: determining the impact of sedimentary facies, geostress, and interlayers on the fracturing effect of the target fracturing well, respectively.

[0102] As an example, the terminal can draw simulation diagrams of the first fracture under different sedimentary facies conditions, and simulation diagrams of the second fracture corresponding to the in-situ stress of different reservoirs in the same fracturing section; based on the simulation diagram of the first fracture, the influence of sedimentary facies on the fracturing effect can be determined; based on the simulation diagram of the second fracture, the influence of in-situ stress on the fracturing effect can be determined; based on the proppant-carrying fluid stage curve in the fracturing construction curve, the influence of interlayers on the fracturing effect can be determined.

[0103] Since sedimentary facies distribution affects the lithological characteristics of reservoirs, and lithology also influences the propagation of fracturing fractures to some extent, the terminal can generate simulation maps of the first fracture under different sedimentary facies conditions. The fracture length in the simulation map can be used to determine the well fracture propagation, and the well fracture propagation can be used to determine the influence of sedimentary facies on the fracturing effect.

[0104] for example, Figure 3 The first fracture simulation diagram (also referred to as the post-well pressure fracture simulation diagram) provided for the embodiments of this application, in Figure 3 The images, from left to right, show simulated fractures after fracturing in the plain, the fracturing front, and the Hunan region, with fracture lengths of 200m, 180m, and 160m respectively. This indicates that the fracture expansion is greatest in the plain and least in the Hunan region. Therefore, it can be determined that the plain has the greatest impact on fracturing effectiveness.

[0105] In some embodiments, the terminal can also plot fracturing operation curves corresponding to different deposition phases, and determine the influence of deposition phases on fracturing effect by comparing fracturing operation curves of different deposition phases. Figure 4 A hydraulic fracturing construction curve for Hunan Province provided in this application embodiment is derived from... Figure 4 As can be seen, the fracturing operation curve shows a downward trend. During the normal propagation stage, the oil pressure drops significantly, the fracture propagation length is short, and the fracturing effect is generally poor. Therefore, it can be determined that wells located in the plain facies zone have better fracture propagation than wells located at the edge, while those in the Hunan region are the worst.

[0106] Because fractures in the same fracturing section will exhibit different behaviors under different geostress conditions, the terminal can obtain a second fracture simulation map corresponding to the geostress of different reservoirs in the same fracturing section, and determine the influence of sedimentation on the fracturing effect based on the first fracture simulation map; and determine the influence of geostress on the fracturing effect based on the second fracture simulation map.

[0107] For example, when performing multi-stage cluster perforation fracturing, different perforation locations within the same fracturing segment will result in different fracture morphologies if there are significant differences in geostress. By selecting fracturing segments with large geostress differences, such as those where the stress difference between the upper and lower reservoirs differs by 10 MPa, the following fracturing pattern can be plotted: Figure 5 The simulation diagram of the second crack shown in (a) has... Figure 5 (a) It can be seen that the upper reservoir fractures propagate well, while the lower reservoir fractures propagate poorly. When the reservoir in-situ stress is similar in the same fractured section, the following diagram is drawn: Figure 5 (b) shows the simulation diagram of the second crack. Figure 5 (b) It can be seen that when the reservoir stress in the same fractured section is similar, the fractures generally expand uniformly.

[0108] Because the vertical lithological assemblage contains thin interlayers, during fracturing operations, if the flow rate is small, the ability of hydraulic fracturing to penetrate non-permeable interlayers will be greatly reduced, and sand plugging is likely to form in sections with thicker interlayers and narrower fracture widths. Therefore, thin interlayers affect the flow rate, pressure, and sand-to-liquid ratio of the target fracturing well. Consequently, the terminal can determine the impact of different interlayers on the fracturing effect based on the sand-carrying fluid stage curve in the fracturing operation curve.

[0109] For example, the terminal can draw such as Figure 6 The fracturing construction curve shown is in Figure 6 During the proppant-carrying stage, the pressure consistently showed an upward trend, indicating that as the proppant ratio increased, the fracture interior continuously filled with proppant. With the loss of fracturing fluid, some proppant settled at the fracture bottom, forming a sand dam. The gradual increase in the height of the sand dam made proppant transport difficult, leading to sand plugging in the later stages of fracturing. Therefore, it can be determined that excessively thick interlayers between reservoirs will cause sand plugging during pressure fracturing. In other words, the thicker the interlayers between reservoirs, the worse the fracturing effect.

[0110] Step 203: The terminal selects the fracturing layer in the target fracturing well according to the selection rules based on the influence of geological factors on the fracturing effect of the target fracturing well.

[0111] It should be noted that the selection rules can be set in advance according to needs. For example, the selection rules can include prioritizing well selection based on good sedimentary facies zones, plains, and frontal zones; selecting reservoirs with good physical properties, large thickness, and high brittleness during well selection; or selecting reservoirs with similar in-situ stress as the same segment; and when selecting layer combinations and thin interbedded layers, selecting reservoirs with similar in-situ stress and no obvious barriers between them as a set of fracturing segments, etc.

[0112] In some embodiments, after the terminal selects the fracturing layer in the target fracturing well according to the layer selection rules, it can also prompt the selected fracturing layer through a prompt message so that the staff can understand the optimal fracturing layer.

[0113] In this embodiment, the terminal can qualitatively and quantitatively determine the fracturing effect through the fracturing construction curve, thereby making the fracturing effect more representative. After determining the fracturing effect of the target fracturing well, by considering the influence of sedimentary facies, geostress, and interlayers on the fracturing effect, the fracturing layer can be selected more rationally, improving the difference in fracture propagation within the same fracturing section, resulting in better fracturing stimulation, maximizing reservoir utilization, and further increasing production.

[0114] Figure 7This is a schematic diagram of a fracturing layer selection device provided in an embodiment of this application. The fracturing layer selection device can be implemented by software, hardware, or a combination of both. The fracturing layer selection device may include: an acquisition module 701, a determination module 702, and a selection module 703.

[0115] The acquisition module 701 is used to acquire the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well.

[0116] The determination module 702 is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well based on the fracturing construction curve, the construction data, and the geological factors.

[0117] The selection module 703 is used to select the fracturing layer in the target fracturing well according to the layer selection rules based on the influence of the geological factors on the fracturing effect of the target fracturing well.

[0118] In some embodiments, see Figure 8 The determining module 702 includes:

[0119] The first determining submodule 7021 is used to determine the first fracturing effect on the target fracturing well based on the pre-fracturing fluid stage curve and the proppant-carrying fluid stage curve in the fracturing construction curve.

[0120] The second determining submodule 7022 is used to determine the second fracturing effect on the target fracturing well based on the fracturing construction curve and the construction data;

[0121] The third determining submodule 7023 is used to determine the first fracturing effect and the second fracturing effect as the fracturing effect on the target fracturing well;

[0122] The fourth determination submodule 7024 is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well.

[0123] In some embodiments, the second determining submodule 7022 is used for:

[0124] Based on the fracturing construction curve, the net pressure is fitted using the reservoir lithology parameters, geostress parameters, and physical property parameters included in the construction data to obtain the fracture parameters;

[0125] The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters.

[0126] In some embodiments, the geological factors include sedimentary facies, geostress, and interlayers;

[0127] The fourth determining submodule 7024 is used for:

[0128] Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively.

[0129] Based on the first fracture simulation diagram, determine the impact of the deposition relative to the fracturing effect;

[0130] Based on the second fracture simulation diagram, determine the influence of the in-situ stress on the fracturing effect;

[0131] The influence of the interlayer on the fracturing effect is determined based on the proppant-carrying fluid stage curve in the fracturing construction curve.

[0132] In some embodiments, see Figure 9 The device further includes:

[0133] The prompt module 704 is used to prompt the selected fracturing layer with prompt information.

[0134] In this embodiment, the terminal can qualitatively and quantitatively determine the fracturing effect through the fracturing construction curve, thereby making the fracturing effect representative. After determining the fracturing effect of the target fracturing well, by considering the influence of sedimentary facies, geostress, and interlayers on the fracturing effect, the fracturing layer can be selected more rationally, improving the difference in fracture propagation within the same fracturing section, resulting in better fracturing stimulation, maximizing reservoir utilization, and further increasing production.

[0135] It should be noted that the fracturing layer selection device provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the fracturing layer selection device and the fracturing layer selection method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0136] Figure 10This illustration shows a structural block diagram of a terminal 1000 provided in an exemplary embodiment of this application. The terminal 1000 may be a smartphone, tablet computer, MP3 player (Moving Picture Experts Group Audio Layer III), MP4 player (Moving Picture Experts Group Audio Layer IV), laptop computer, or desktop computer. The terminal 1000 may also be referred to as a user device, portable terminal, laptop terminal, desktop terminal, or other names.

[0137] Typically, terminal 1000 includes a processor 1001 and a memory 1002.

[0138] Processor 1001 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 1001 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 1001 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 1001 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the screen. In some embodiments, processor 1001 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0139] The memory 1002 may include one or more computer-readable storage media, which may be non-transitory. The memory 1002 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 1002 are used to store at least one instruction, which is executed by the processor 1001 to implement the fracturing layer selection method provided in the method embodiments of this application.

[0140] In some embodiments, the terminal 1000 may also optionally include a peripheral device interface 1003 and at least one peripheral device. The processor 1001, memory 1002, and peripheral device interface 1003 can be connected via a bus or signal line. Each peripheral device can be connected to the peripheral device interface 1003 via a bus, signal line, or circuit board. Specifically, the peripheral device includes at least one of the following: a radio frequency circuit 1004, a display screen 1005, a camera assembly 1006, an audio circuit 1007, a positioning assembly 1008, and a power supply 1009.

[0141] Peripheral device interface 1003 can be used to connect at least one I / O (Input / Output) related peripheral device to processor 1001 and memory 1002. In some embodiments, processor 1001, memory 1002 and peripheral device interface 1003 are integrated on the same chip or circuit board; in some other embodiments, any one or two of processor 1001, memory 1002 and peripheral device interface 1003 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0142] The radio frequency (RF) circuit 1004 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 1004 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 1004 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 1004 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 1004 can communicate with other terminals via at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: metropolitan area networks (MANs), various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks (WLANs), and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 1004 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0143] Display screen 1005 is used to display a UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When display screen 1005 is a touch display screen, it also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to processor 1001 for processing. In this case, display screen 1005 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there may be one display screen 1005, serving as the front panel of terminal 1000; in other embodiments, there may be at least two display screens, respectively disposed on different surfaces of terminal 1000 or in a folded design; in still other embodiments, display screen 1005 may be a flexible display screen, disposed on a curved or folded surface of terminal 1000. Furthermore, display screen 1005 may also be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. The display screen 1005 can be made of materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0144] The camera assembly 1006 is used to acquire images or videos. Optionally, the camera assembly 1006 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is located on the front panel of the terminal, and the rear-facing camera is located on the back of the terminal. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, a wide-angle camera, and a telephoto camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, panoramic shooting by fusion of the main camera and the wide-angle camera, VR (Virtual Reality) shooting, or other fusion shooting functions. In some embodiments, the camera assembly 1006 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm-light flash and a cool-light flash, which can be used for light compensation at different color temperatures.

[0145] The audio circuit 1007 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to the processor 1001 for processing, or input to the radio frequency circuit 1004 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each positioned at a different location on the terminal 1000. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from the processor 1001 or the radio frequency circuit 1004 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, the audio circuit 1007 may also include a headphone jack.

[0146] The positioning component 1008 is used to determine the current geographical location of the terminal 1000 in order to enable navigation or LBS (Location Based Service). The positioning component 1008 can be a positioning component based on the US GPS (Global Positioning System), China's BeiDou system, Russia's Granas system, or the EU's Galileo system.

[0147] The power supply 1009 is used to power the various components in the terminal 1000. The power supply 1009 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When the power supply 1009 includes a rechargeable battery, the rechargeable battery can support wired charging or wireless charging. The rechargeable battery can also be used to support fast charging technology.

[0148] In some embodiments, the terminal 1000 further includes one or more sensors 1010. The one or more sensors 1010 include, but are not limited to: an accelerometer 1011, a gyroscope 1012, a pressure sensor 1013, a fingerprint sensor 1014, an optical sensor 1015, and a proximity sensor 1016.

[0149] Accelerometer 1011 can detect the magnitude of acceleration along the three coordinate axes of a coordinate system established by terminal 1000. For example, accelerometer 1011 can be used to detect the components of gravitational acceleration along the three coordinate axes. Processor 1001 can control display screen 1005 to display the user interface in either a landscape or portrait view based on the gravitational acceleration signal acquired by accelerometer 1011. Accelerometer 1011 can also be used for games or for acquiring user motion data.

[0150] The gyroscope sensor 1012 can detect the orientation and rotation angle of the terminal 1000. The gyroscope sensor 1012, in conjunction with the accelerometer sensor 1011, can collect 3D motion data from the user on the terminal 1000. Based on the data collected by the gyroscope sensor 1012, the processor 1001 can perform the following functions: motion sensing (e.g., changing the UI based on the user's tilt), image stabilization during shooting, game control, and inertial navigation.

[0151] The pressure sensor 1013 can be disposed on the side bezel of the terminal 1000 and / or on the lower layer of the display screen 1005. When the pressure sensor 1013 is disposed on the side bezel of the terminal 1000, it can detect the user's grip signal on the terminal 1000, and the processor 1001 can perform left / right hand recognition or quick operation based on the grip signal collected by the pressure sensor 1013. When the pressure sensor 1013 is disposed on the lower layer of the display screen 1005, the processor 1001 can control the operable controls on the UI interface based on the user's pressure operation on the display screen 1005. The operable controls include at least one of button controls, scroll bar controls, icon controls, and menu controls.

[0152] The fingerprint sensor 1014 is used to collect a user's fingerprint. The processor 1001 identifies the user based on the fingerprint collected by the fingerprint sensor 1014, or vice versa. When the user's identity is identified as trusted, the processor 1001 authorizes the user to perform relevant sensitive operations, including unlocking the screen, viewing encrypted information, downloading software, making payments, and changing settings. The fingerprint sensor 1014 can be located on the front, back, or side of the terminal 1000. When the terminal 1000 has physical buttons or a manufacturer's logo, the fingerprint sensor 1014 can be integrated with the physical buttons or manufacturer's logo.

[0153] An optical sensor 1015 is used to collect ambient light intensity. In one embodiment, the processor 1001 can control the display brightness of the display screen 1005 based on the ambient light intensity collected by the optical sensor 1015. Specifically, when the ambient light intensity is high, the display brightness of the display screen 1005 is increased; when the ambient light intensity is low, the display brightness of the display screen 1005 is decreased. In another embodiment, the processor 1001 can also dynamically adjust the shooting parameters of the camera assembly 1006 based on the ambient light intensity collected by the optical sensor 1015.

[0154] The proximity sensor 1016, also known as a distance sensor, is typically mounted on the front panel of the terminal 1000. The proximity sensor 1016 is used to detect the distance between the user and the front of the terminal 1000. In one embodiment, when the proximity sensor 1016 detects that the distance between the user and the front of the terminal 1000 is gradually decreasing, the processor 1001 controls the display screen 1005 to switch from a screen-on state to a screen-off state; when the proximity sensor 1016 detects that the distance between the user and the front of the terminal 1000 is gradually increasing, the processor 1001 controls the display screen 1005 to switch from a screen-off state to a screen-on state.

[0155] Those skilled in the art will understand that Figure 10 The structure shown does not constitute a limitation on terminal 1000 and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0156] This application also provides a non-transitory computer-readable storage medium, which, when the instructions in the storage medium are executed by the processor of a terminal, enables the terminal to execute the fracturing layer selection method provided in the above embodiment.

[0157] This application also provides a computer program product containing instructions that, when run on a terminal, cause the terminal to execute the fracturing layer selection method provided in the above embodiments.

[0158] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0159] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application should be included within the protection scope of the present application.

Claims

1. A method for selecting fracturing layers, characterized in that, The method includes: Acquire the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well. The geological factors include sedimentary facies, geostress, and interlayers. The relationship between displacement, pressure, and sand mixing ratio reflected in the pre-flush fluid stage curve and the sand-carrying fluid stage curve of the fracturing construction curve is matched with multiple pre-stored relationships between displacement, pressure, and sand mixing ratio to determine the first fracturing effect corresponding to the matched relationship. Based on the fracturing construction curve, the fracture parameters are obtained by fitting the net pressure using the reservoir lithological parameters, geostress parameters, and physical property parameters included in the construction data. The lithological parameters include reservoir porosity, density, and sandstone / mudstone content. The geostress parameters include the magnitude of the vertical principal stress, the magnitude of the maximum horizontal principal stress, the magnitude of the minimum horizontal principal stress, and the direction of the maximum horizontal principal stress. The physical property parameters include porosity, permeability, skin factor, and heterogeneity factor. The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters; The first fracturing effect and the second fracturing effect are determined as the fracturing effect on the target fracturing well; Determine the impact of the geological factors on the fracturing effect of the target fracturing well; Based on the influence of the geological factors on the fracturing effect of the target fracturing well, the fracturing layer in the target fracturing well is selected according to the layer selection rules.

2. The method as described in claim 1, characterized in that, The determination of the impact of the geological factors on the fracturing effect of the target fracturing well includes: Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively. Based on the first fracture simulation diagram, determine the impact of the deposition relative to the fracturing effect; Based on the second fracture simulation diagram, determine the influence of the in-situ stress on the fracturing effect; The influence of the interlayer on the fracturing effect is determined based on the proppant-carrying fluid stage curve in the fracturing construction curve.

3. The method as described in claim 1, characterized in that, After selecting the fracturing layer in the target fracturing well according to the layer selection rules based on the influence of the geological factors on the fracturing effect of the target fracturing well, the method further includes: The selected fracturing layer will be indicated by a prompt message.

4. A fracturing layer selection device, characterized in that, The device includes: The acquisition module is used to acquire the fracturing construction curve of the target fracturing well, the geological factors of the location of the target fracturing well, and the construction data of the target fracturing well. The geological factors include sedimentary facies, geostress, and interlayers. The determination module is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well based on the fracturing construction curve, the construction data, and the geological factors. The selection module is used to select the fracturing layer in the target fracturing well according to the layer selection rules based on the influence of the geological factors on the fracturing effect of the target fracturing well. The determining module includes: The first determining submodule is used to match the relationship between displacement, pressure and sand mixing ratio reflected in the pre-flush fluid stage curve and the sand-carrying fluid stage curve in the fracturing construction curve with multiple pre-stored relationships between displacement, pressure and sand mixing ratio, so as to determine the first fracturing effect corresponding to the matched relationship. The second determining submodule is used to determine the second fracturing effect on the target fracturing well based on the fracturing construction curve and the construction data; The third determining submodule is used to determine the first fracturing effect and the second fracturing effect as the fracturing effect on the target fracturing well; The fourth determination submodule is used to determine the impact of the geological factors on the fracturing effect of the target fracturing well; The second determining submodule is used for: Based on the fracturing construction curve, net pressure fitting is performed using the reservoir lithology parameters, geostress parameters, and physical property parameters included in the construction data to obtain fracture parameters. The lithology parameters include reservoir porosity, density, and sandstone / mudstone content. The geostress parameters include the magnitude of vertical principal stress, the magnitude of maximum horizontal principal stress, the magnitude of minimum horizontal principal stress, and the direction of maximum horizontal principal stress. The physical property parameters include porosity, permeability, skin factor, and heterogeneity factor. The secondary fracturing effect on the target fracturing well is determined based on the fracture parameters.

5. The apparatus as described in claim 4, characterized in that, The geological factors include sedimentary facies, geostress, and interlayers; The fourth determining submodule is used for: Simulation diagrams of the first fracture under different sedimentary facies conditions and simulation diagrams of the second fracture corresponding to the geostress of different reservoirs in the same fracturing section were drawn respectively. Based on the first fracture simulation diagram, determine the impact of the deposition relative to the fracturing effect; Based on the second fracture simulation diagram, determine the influence of the in-situ stress on the fracturing effect; The influence of the interlayer on the fracturing effect is determined based on the proppant-carrying fluid stage curve in the fracturing construction curve.

6. The apparatus as claimed in claim 4, characterized in that, The device further includes: The prompt module is used to provide prompts for the selected fracturing layer through prompt messages.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed by a processor, implement the steps of the method described in any one of claims 1 to 3.

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