Shale oil inclined shaft fracturing seam distribution optimization method, system, equipment and medium

Abstract

The invention belongs to the technical field of oil production engineering, and provides a shale oil inclined shaft fracturing seam distribution optimization method, system, equipment and medium, and the method comprises the steps: longitudinally dividing a well into development units, constructing a simulation model, and determining fracturing construction parameters and material performance parameters of each seam based on the simulation model; according to the adjacent well fracturing construction and evaluation result, the gap distance is initialized, and based on fracturing construction parameters and material performance parameters of all sections, the gap height of all gaps is simulated through a simulation model; projecting the cracks to the longitudinal direction, and sequentially iteratively judging whether the superposition of the projections of all the cracks in the longitudinal direction realizes full coverage on the development units or not and whether the seepage field between the cracks of any development unit realizes full coverage on the development units or not; according to the method, longitudinal and plane optimization loop iteration is carried out, longitudinal hydraulic fracture full coverage and plane fracture full utilization are taken as double optimization targets, longitudinal and transverse transformation requirements are met, and a precise design basis is provided for fracturing design and transformation efficiency improvement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil production engineering, and particularly relates to a shale oil deviated well fracturing seam distribution optimization method, system, device and medium. BACKGROUND

[0002] Shale oil has become a new position for increasing reserves and production of oil and gas in China, and is of great significance to national energy security. Among them, the deep shale oil in Mabei has the characteristics of poor matrix property, large vertical span, scattered sweet spots, and developed layering. The conventional straight well and horizontal well development encounters a bottleneck. On the one hand, it is reflected in the large vertical span, scattered sweet spots, and developed layering, which leads to no significant golden target point for horizontal well development, and the seam height is controlled, so the vertical seam control range is limited. On the other hand, it is reflected in the poor reservoir property and high development cost, and single layer development cannot effectively support the benefit development. In the exploration and evaluation stage, the advantage layer is explored through the high-deviation well, and in the middle and late development stage, the multi-layer commingling production supports the benefit development. The deviated well plays a crucial role. The seam distribution mode is the core link of fracturing design. If the seam interval is too small, the seam stress interference will cause local stress increase, affect the balanced fracture initiation and construction safety; if the seam interval is too large, the seam interval will cause low producing degree, limit the transformation effect and regional recovery degree. The seam distribution mode of the deviated well is significantly different from that of the horizontal well. Compared with the horizontal well which is transformed by multiple seams in one layer and the high-deviation well which is transformed by multiple seams in multiple layers, not only the horizontal seam distribution demand needs to be considered, but also the vertical seam distribution demand needs to be considered. Whether the seam distribution mode is reasonable or not is a key factor affecting the fracturing effect and the regional recovery degree.

[0003] The prior art discloses a kind of non-homogeneous tight reservoir horizontal well segmented fracturing seam optimization method. For the most economical and reasonable seam distribution mode of strong heterogeneity horizontal section, the pressure wave situation is obtained after 3 years of production by using software to simulate the interactive layer model containing barrier zone of hydraulic fracture, the permeability of different barrier zones and the corresponding limit width are obtained, whether the effective reservoir on both sides of barrier zone needs to be divided into two independent seepage units is judged by fitting the relationship between them; according to whether the economic limit production capacity can be reached after fracturing for 3 years, the economic limit seepage unit width of different grade reservoirs is determined; the pressure wave propagation situation after 3 years of production under the condition of arranging different hydraulic fracture intervals in continuous same sand body is simulated to determine the fracture interval; according to the logging interpretation results and the reservoir grade division standard, the horizontal section is divided into multiple reservoir units; combined with the limit width of seepage unit division and the reasonable fracture interval requirement of continuous sand body, multiple hydraulic fracture distribution schemes are set on the horizontal section, and the economic and effective distribution scheme is optimized. The method is not applicable to the seam distribution optimization of deviated well: only the horizontal seam distribution demand is considered, and the vertical coverage of each layer and each small layer is not considered.

[0004] The prior art proposes a heterogeneous dense reservoir horizontal well segmented fracturing seam optimization method. For the current water injection development well pattern newly drilled infill horizontal well, there is no effective and mature hydraulic fracturing artificial fracture distribution method. The method is based on fully developing the remaining oil in old oilfields, while avoiding communication with water lines and old wells. It can not only effectively and more greatly develop the remaining oil to obtain more commercial crude oil, but also avoid communication with the water lines formed between the injection wells, while using the energy of the injected water to supplement, maximize the single well production and reduce the decline amplitude. It can also avoid communication with the old wells under the original well pattern conditions, interfere with the contribution of the old wells to the crude oil production, and improve the overall development effect of the oilfield. The method comprehensively considers the overflow point, water line, remaining oil and other characteristics, and performs single cluster distribution / seam distribution / two cluster distribution / mixed distribution mode. The method is not suitable for inclined well seam optimization: only the horizontal direction seam distribution demand is considered, and the vertical direction seam distribution demand is not considered.

[0005] The prior art also shows that the ratio of the interference fracture spacing (Delta x) to the upper limit seam height (H) is 1.5 by finite element simulation results and theoretical calculation results; considering the difference in induced stress effect of the net pressure actually produced in the fracture of each cluster during the fracturing process, the general reasonable cluster spacing should be not more than 2 times the induced stress action radius. Realizing the maximum shale oil reservoir seam network reconstruction is beneficial to the improvement of the yield. According to the current 50 m segmented long of the shale oil in Gulong, the cluster number and cluster spacing are simulated by using the fracturing software seam network model, and the optimized 50 m segmented cluster number is 3-7 clusters. The numerical simulation lacks effective verification, and the method is not suitable for inclined well seam optimization: only the horizontal direction seam distribution demand is considered, and the vertical direction seam distribution demand is not considered.

[0006] The prior art also proposes horizontal well perforation section cluster optimization based on optical fiber temperature monitoring technology. By embedding optical fiber temperature monitoring equipment in the horizontal well, the temperature profile characteristics of the horizontal well section are monitored in real time, the oil production and change of each section cluster after fracturing are effectively evaluated, the index model evaluation formula and capacity interpretation chart and standard of logging parameters and fracturing parameters are established, and the double sweet spot optimization of geological sweet spot and engineering sweet spot is realized. In the unconventional horizontal well application of Lin oilfield in Qian'an area: the double sweet spot section reduces the perforation section length, increases the perforation cluster number, and shortens the cluster spacing, so as to realize the effective optimization of the perforation section and perforation cluster. The method is not suitable for inclined well seam optimization: only the horizontal direction seam distribution demand is considered, and the vertical direction seam distribution demand is not considered.

[0007] In summary, the existing inclined well seam distribution method follows the horizontal well seam distribution method, only considers the horizontal direction seam distribution demand, and does not consider the vertical direction seam distribution demand, which cannot provide accurate design basis. SUMMARY

[0008] The shale oil inclined well fracturing fracture distribution optimization method, system, device and medium provided by the present application solve the problem that the existing inclined well fracture distribution method follows the horizontal well fracture distribution method, only considers the horizontal fracture distribution requirement, does not consider the longitudinal fracture distribution requirement, and cannot provide accurate design basis.

[0009] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a shale oil inclined well fracturing fracture distribution optimization method, comprising: Dividing the well into longitudinal development units, constructing a simulation model, determining the fracturing construction parameters and material performance parameters of each section based on the simulation model; Initializing the fracture spacing according to the fracturing construction and evaluation results of adjacent wells, simulating the fracture height of each fracture based on the fracturing construction parameters and material performance parameters of each section through the simulation model; Projecting each fracture onto the longitudinal direction, iteratively determining whether the superposition of all fractures projected in the longitudinal direction achieves full coverage of the development unit, and determining whether the fracture interflow field of the development unit achieves full coverage of the development unit on the basis of meeting the full coverage; If both meet the full coverage, further determining whether there is stress interference between the fractures in the plane, and obtaining the fracture distribution method of longitudinal full coverage and plane fracture interflow full utilization when there is no stress interference.

[0010] Further, the well is divided into longitudinal development units, a simulation model is constructed, the fracturing construction parameters and material performance parameters of each fracture are determined based on the simulation model, including: According to the geological and engineering characteristics, the longitudinal development units are divided, and then combined with the well trajectory and stress profile, a simulation model is established through numerical simulation software, and further fracturing construction parameters and material performance parameters are obtained.

[0011] Further, the geological and engineering characteristics include longitudinal span, thickness of each sublayer, thickness of interlayer, porosity and permeability of each sublayer, fluid characteristics, and stress difference of each sublayer section; The well trajectory characteristics are the inclination, azimuth angle and logging data along the well trajectory of the well section to be fractured, and the logging data along the well trajectory includes gamma, density, acoustic time difference, resistivity and neutron porosity; The construction parameters include fracturing single cluster discharge, liquid volume and sand volume, and the material parameters include liquid type and viscosity.

[0012] Further, the fractures are projected onto the longitudinal direction, and it is iteratively determined whether the superposition of all fractures projected in the longitudinal direction achieves full coverage of the development unit, including: The projection of each fracture along the well trajectory in the longitudinal direction is superimposed, and when the range of the superimposed projection is greater than 90% of the longitudinal range of the development unit, full coverage is achieved; when full coverage is achieved, it is determined whether the inter-fracture seepage field of any development unit achieves full coverage of the development unit; if full coverage is not achieved, the initial inter-fracture spacing is reduced, and the fracture heights of each fracture are simulated again.

[0013] Further, when the initial inter-fracture spacing is reduced, the spacing is reduced to ΔCp1, and the single iteration assignment is 1 / 5 of the initial spacing; if the condition is still not met after 4 iterations, the iteration is ended, and it is directly determined whether the inter-fracture seepage field of any development unit achieves full coverage of the development unit.

[0014] Further, the determination of whether the inter-fracture seepage field of any development unit achieves full coverage of the development unit comprises the following steps. In a specific development unit, through model simulation, it is determined whether the inter-fracture seepage field can achieve full coverage in a set time under the current fracturing construction parameters and materials; when full coverage is achieved, it is determined whether stress interference exists between fractures in the plane; if full coverage is not achieved in the plane, the initial spacing is reduced, and the fracture heights of each fracture are simulated again; when the initial inter-fracture spacing is reduced, the spacing is reduced to ΔCp2, and ΔCp2 is less than ΔCp1; if the condition is still not met after all iterations, the iteration is ended, and it is directly determined whether stress interference exists between fractures in the plane.

[0015] Further, when the inter-fracture seepage field of any development unit achieves full coverage, it is further determined whether stress interference exists between fractures in the plane, and when there is no stress interference, a fracturing arrangement mode of longitudinal full coverage and full use of inter-fracture in the plane is obtained, which comprises the following steps. If the result is that stress interference exists between fractures in the plane, the initial spacing is increased, and the fracture heights of each fracture are simulated; if the result is that stress interference does not exist between fractures in the plane, the current fracturing arrangement mode achieves longitudinal full coverage and full use of inter-fracture in the plane; the judgment condition of whether stress interference exists between fractures in the plane is that, through model geostress field simulation, when the inter-fracture stress is higher than the initial value by 15%, stress interference exists; the spacing is increased to ΔCp3, and ΔCp3 is less than ΔCp2; if the condition is still not met after all iterations, the iteration is ended.

[0016] In a second aspect, the present application provides a shale oil deviated well fracturing arrangement optimization system, which comprises the following steps. A model construction module is configured to divide development units in the longitudinal direction of the well, construct a simulation model, and determine fracturing construction parameters and material performance parameters of each section based on the simulation model; A model simulation module is configured to initialize the inter-fracture spacing according to the fracturing construction and evaluation results of adjacent wells, simulate the fracture heights of each fracture based on the fracturing construction parameters and material performance parameters of each section, and the simulation model; An iteration judgment module is configured to project each fracture into the longitudinal direction, and iteratively determine whether all fractures in the longitudinal direction achieve full coverage of the development unit, and whether the inter-fracture seepage field of any development unit achieves full coverage of the development unit. A judgment output module is configured to satisfy full coverage, and further judge whether stress interference exists between the planes of each seam, so as to obtain a longitudinal full coverage and a plane seam full use of the seam arrangement mode without stress interference.

[0017] In a third aspect, the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the shale oil deviated well fracturing seam arrangement optimization method when executing the computer program.

[0018] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program implements the steps of the shale oil deviated well fracturing seam arrangement optimization method when executed by a processor.

[0019] Compared with the prior art, the present application has the following technical effects: The present application solves the problem that only horizontal seam arrangement needs are considered and longitudinal seam arrangement needs are ignored in the prior art. Through in-depth research and innovation, the present application realizes the optimization and iterative arrangement of longitudinal and plane seams, ensuring that hydraulic fractures can achieve full coverage in three-dimensional space, i.e., in the longitudinal and plane directions. This comprehensive fracture coverage not only improves the efficiency of fracturing reconstruction, but also significantly enhances the reconstruction effect, enabling oil and gas resources to be more fully released.

[0020] The implementation of the present application provides precise design basis for fracturing design and reconstruction work. Through accurate calculation and simulation, the formation and development process of fractures can be predicted, thereby effectively reducing the generation of invalid fractures and avoiding resource waste. This not only improves the yield of oil and gas wells, but also significantly improves the recovery rate, making the development of oil and gas resources more efficient and sustainable.

[0021] In addition, the technical solution successfully considers the longitudinal and horizontal reconstruction needs. In the past fracturing seam arrangement methods, only the horizontal fracture layout was considered, and the importance of longitudinal fractures was ignored. However, the present application optimizes the formation of the fracture network by considering the seam arrangement needs in the longitudinal and plane directions, enabling oil and gas resources to be fully utilized in three-dimensional space, further improving the production potential of oil and gas wells.

[0022] Through numerical simulation and model optimization, the present application can also predict and evaluate potential risks during fracturing construction. This enables the construction team to fully evaluate and prepare for potential risks before construction, thereby effectively reducing construction risks and improving construction safety. This risk prediction and evaluation capability is of great significance for ensuring the safety of construction personnel and the normal operation of equipment.

[0023] Finally, by optimizing the stitching method, the technical scheme helps to improve the production and recovery of the oil and gas well, and further improve the economic benefit of the oil and gas well. For the development of the oil and gas field, the economic benefit is an important index for measuring whether the technical scheme is successful. The method reduces the development cost by improving the production and recovery, prolongs the production life of the oil and gas well, and provides strong technical support for the long-term stable development of the oil and gas field.

[0024] In summary, the technical scheme optimizes the fracturing stitching method of the shale oil deviated well, and achieves remarkable technical effects in many aspects. It not only realizes the consideration of longitudinal and transverse reconstruction requirements, improves the fracturing efficiency and the production and recovery of the oil and gas well, but also provides strong technical support for the development of the oil and gas field. The popularization and application of the technical scheme will be expected to bring broader development prospects for the oil and gas industry. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The flowchart of the present application.

[0026] Figure 2 The logic block diagram of the present application.

[0027] Figure 3 The schematic diagram of the development unit division of the present application.

[0028] Figure 4 The fracture height simulation schematic diagram of the present application.

[0029] Figure 5 The stress field simulation evaluation stress interference schematic diagram under the condition of the cluster spacing of 5m of the present application.

[0030] Figure 6 The longitudinal full coverage simulation result of the present application.

[0031] Figure 7 The plane fracture interlayer full use simulation result of the present application. DETAILED DESCRIPTION

[0032] The present application is further described below in combination with the drawings: Example 1, please refer to Figure 1 A shale oil deviated well fracturing stitching optimization method, comprising: Dividing the well into development units in the longitudinal direction, constructing a simulation model, determining the fracturing construction parameters of each fracture and the material performance parameters based on the simulation model; According to the fracturing construction and evaluation results of the adjacent well, initializing the fracture spacing, simulating the fracture height of each fracture through the simulation model and the fracturing construction parameters of each fracture and the material performance parameters; Projecting each fracture to the longitudinal direction, and iteratively judging whether the superposition of the projections of all fractures in the longitudinal direction realizes full coverage of the development unit, and whether the inter-fracture flow field of any development unit realizes full coverage of the development unit. All meet full coverage, further judge whether there is stress interference between each seam in the plane, and get the seam arrangement mode of longitudinal full coverage and full use of plane seam when there is no stress interference.

[0033] The application realizes the optimized cyclic iteration of longitudinal and plane seam arrangement, ensures that the hydraulic fracture can realize full coverage in three-dimensional space, i.e., longitudinal and plane. The comprehensive fracture coverage not only improves the efficiency of fracturing reconstruction, but also significantly enhances the reconstruction effect, so that the oil and gas resources can be more fully released.

[0034] Embodiment 2, please refer to Figure 2 A shale oil deviated well seam arrangement optimization method, comprising the following steps: Step 1, according to the geological and engineering characteristics, the longitudinal development unit is divided; Step 2, according to the results of step 1, well trajectory and stress profile, a simulation model is established through a numerical simulation software; Step 3, according to the results of steps 1 and 2, the fracturing construction parameters and material performance parameters are obtained; Step 4, the adjacent well fracturing construction and evaluation results are used to initialize the seam spacing; Step 5, according to the results of steps 1, 2, 3 and 4, the seam height of each seam is simulated through the simulation model; Step 6, the fractures of each seam are projected to the longitudinal direction, and it is judged whether the superposition of all fractures projected in the longitudinal direction realizes full coverage of the development unit; Step 7, if the result of step 6 is that the longitudinal full coverage is realized, step 8 is performed; if the longitudinal full coverage is not realized, the spacing in step 4 is reduced, and step 5 is performed; Step 8, in a specific development unit, whether the seam interflow field can realize full coverage in 2 years under the current fracturing construction parameters and materials is simulated through the model; Step 9, if the result of step 8 is that the plane seam interflow field realizes full coverage, step 10 is performed; if the plane seam interflow field does not realize full coverage, the cluster spacing is reduced, and step 5 is performed; Step 10, according to the model, it is judged whether there is stress interference between each seam in the plane; Step 11, if the result of step 10 is that there is stress interference between each seam in the plane, the cluster spacing is increased, and step 5 is performed; if the result of step 10 is that there is no stress interference between each seam in the plane, the current seam arrangement mode realizes longitudinal full coverage and full use of plane seam.

[0035] Preferably, in step 1, the geological and engineering characteristics for dividing the longitudinal development unit include but are not limited to: longitudinal span, thickness of each small layer, thickness of interlayer; porosity, permeability and fluid characteristics of each small layer; and the longitudinal reservoir and interlayer stress difference of each small layer is obtained.

[0036] Preferably, in step 2, the obtained well trajectory features are the inclination and azimuth angle of the well section to be fractured; the logging data along the well trajectory, including gamma, density, acoustic time difference, resistivity, neutron porosity and other parameters; the minimum horizontal principal stress and fracture pressure along the well trajectory; and the numerical simulation software can be commonly used Petrel, Fracman, Gohfer, FracproPT, etc.

[0037] Preferably, in step 3, according to the results of steps 1 and 2, the construction parameters such as the single cluster displacement, liquid volume, sand volume, etc. are determined, and the material parameters such as the liquid type and viscosity are determined.

[0038] Preferably, in step 4, according to the results of adjacent well fracturing construction and evaluation, the fracture spacing is initialized to start step 5.

[0039] Preferably, in step 5, the simulation model is the integrated geological engineering model constructed according to steps 1, 2, 3 and 4, which is usually constructed through an integrated platform such as Petrel.

[0040] Preferably, in step 6, whether the range of the projection superposition of each fracture along the well trajectory in the longitudinal direction is greater than 90% of the longitudinal range of the development unit.

[0041] Preferably, in step 7, the cluster spacing is reduced by ΔCp1, and the single iteration value is 1 / 5 of the initial cluster spacing. If it still does not meet after 4 iterations, it is preferred to meet step 6, and the iteration is ended to enter step 8.

[0042] Preferably, in step 8, the full coverage of the inter-fracture seepage field is that the seepage field between each fracture caused by fracturing can be fully affected.

[0043] Preferably, in step 9, the cluster spacing is reduced by ΔCp2, and the single iteration value is 1 / 5 of the initial ΔCp1. If it still does not meet after 4 iterations, it is preferred to meet step 8, and the iteration is ended to enter step 10.

[0044] Preferably, in step 10, the judgment condition for whether there is stress interference between each fracture in the root plane is that through the model stress field simulation, the inter-fracture stress is higher than the initial value by more than 5MPa.

[0045] Preferably, in step 11, the cluster spacing is increased by ΔCp3, and the single iteration value is 1 / 5 of ΔCp2. If it still does not meet after 4 iterations, the iteration is ended.

[0046] Embodiment 3, a shale oil deviated well fracturing optimization method, characterized in that it comprises the following steps: Step 1, according to the longitudinal span of the well, the thickness of each sublayer, the thickness of the interlayer, the porosity, permeability, and fluid characteristics of each sublayer, and the stress difference of each longitudinal layer, the geological and engineering characteristics are obtained, and the longitudinal is divided into four development units.

[0047] Step 2, according to the results of step 1, through Petrel, Fracman, Gohfer, FracproPT, etc. Geological process integration simulation platform, a simulation model is established. Step 3, according to the results of steps 1 and 2, determine the construction parameters of each fracture, especially optimize the displacement of single fracture to 4m3 / min and the liquid viscosity to 10mPa.s.

[0048] Step 4, adjacent well fracturing construction and evaluation results, the initial fracture spacing is 20m.

[0049] Step 5, according to the results of steps 1, 2, 3, and 4, through the simulation model, the height of each fracture is simulated, such as Figure 4 .

[0050] Step 6, project each fracture into the longitudinal direction, and the superposition of all fractures projected in the longitudinal direction is <development unit longitudinal span>.

[0051] Step 7, if the result of step 6 is to achieve longitudinal full coverage, then step 8 is performed; if the longitudinal full coverage is not achieved, then the spacing in step 4 is reduced, and step 5 is performed. Reduce the cluster spacing, and the single iteration value is 4. If 4 iterations still do not meet the requirements, then the step 6 is optimized, and the iteration is ended to enter step 8.

[0052] Step 8, in a specific development unit, through model simulation, under the current fracturing construction parameters and materials, whether the inter-fracture seepage field can achieve full coverage in 2 years. The inter-fracture seepage field full coverage means that the seepage field between each fracture caused by fracturing reconstruction can be fully swept.

[0053] Step 9, if the result of step 8 is to achieve plane inter-fracture full coverage, then step 10 is performed; if the plane inter-fracture full coverage is not achieved, then the cluster spacing is reduced, and step 5 is performed. Reduce the cluster spacing, and the single iteration value is 2. If 4 iterations still do not meet the requirements, then the step 8 is optimized, and the iteration is ended to enter step 10.

[0054] Step 10, according to the model, judge whether there is stress interference between each fracture in the plane. The judgment condition of whether there is stress interference between each fracture in the plane is that through the model stress field simulation, when the inter-fracture stress is higher than the initial value by more than 5MPa, it is the stress interference critical condition, such as Figure 5 .

[0055] Step 11, if the result of step 10 is that there is stress interference between each seam in the plane, increase the cluster spacing, and optimize the cluster spacing to 10m, the simulation result shows that the current seam arrangement mode realizes longitudinal full coverage and full use of the plane seam (Fig. 6) Figure 6 、 Figure 7 )。

[0056] Shale oil 1 typical deviated well, as a basis for data, method implementation process and results: Table 1 basic parameter table

[0057] In another embodiment of the present application, a shale oil deviated well fracturing seam arrangement optimization system is provided, which can be used to realize the shale oil deviated well fracturing seam arrangement optimization method described above, specifically, the system comprises: The model construction module is used for dividing the well into development units in the longitudinal direction, constructing a simulation model, determining the fracture construction parameters and material performance parameters of each seam based on the simulation model; The model simulation module is used for initializing the seam spacing according to the fracturing construction and evaluation results of adjacent wells, simulating the seam height of each seam through the simulation model and the fracture construction parameters and material performance parameters of each seam; The iterative judgment module is used for projecting each seam fracture to the longitudinal direction, and iteratively judging whether the projection of all fractures in the longitudinal direction realizes full coverage of the development unit, and whether the inter-seam seepage field of any development unit realizes full coverage of the development unit; The judgment output module is used for further judging whether there is stress interference between each seam in the plane when the full coverage is met, and obtaining the seam arrangement mode of longitudinal full coverage and full use of the plane seam when there is no stress interference.

[0058] The division of the modules in the embodiments of the present application is illustrative, and is only a logical function division, and another division mode can be used in actual implementation, and each function module in each embodiment of the present application can be integrated in one processor, or can be physically separated, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software function module.

[0059] In another embodiment of the present application, a computer device is provided, which comprises a processor and a memory, the memory is configured to store a computer program, the computer program comprises program instructions, and the processor is configured to execute the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, and are suitable for implementing one or more instructions, and are particularly suitable for loading and executing one or more instructions in the computer storage medium to implement a corresponding method process or a corresponding function; the processor in the embodiments of the present application can be used for the operation of the shale oil deviated well fracturing fracture optimization method.

[0060] In another embodiment of the present application, the present application further provides a storage medium, specifically a computer readable storage medium (Memory), which is a memory device in a computer device, and is configured to store programs and data. It can be understood that the computer readable storage medium herein can include an internal storage medium in the computer device, and of course can also include an expansion storage medium supported by the computer device. The computer readable storage medium provides a storage space, and the storage space stores an operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and the instructions can be one or more computer programs (including program codes). It should be noted that the computer readable storage medium herein can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory. One or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the shale oil deviated well fracturing fracture optimization method in the above embodiments.

[0061] Those skilled in the art will appreciate that embodiments of the application can be devised for a method, a system, or a computer program product. Accordingly, the present application can be embodied in the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) embodying computer readable program code.

[0062] The present application is described in reference to the flowchart and / or block diagrams of the method, apparatus (system) and computer program product according to embodiments of the application. It will be understood that each block of the flowchart and / or block diagrams, and combinations of blocks in the flowchart and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks.

[0063] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks.

[0064] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more functions specified in the flowchart and / or block diagram block or blocks.

[0065] Finally, it should be noted that the above-mentioned embodiments are merely intended for describing the technical solutions of the present application, but not for limiting it. Although the present application is described in detail with reference to the above embodiments, those skilled in the field should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A method for optimizing the fracturing fracture layout in shale oil deviated wells, characterized in that, include: The well is divided into development units in the vertical direction, a simulation model is constructed, and based on the simulation model, the fracturing construction parameters and material performance parameters of each section are determined; Based on the fracturing construction and evaluation results of adjacent wells, the fracture spacing is initialized, and the fracture height of each fracture is simulated through a simulation model based on the fracturing construction parameters and material performance parameters of each section. Project each crack onto the longitudinal direction, and iterate to determine whether the superposition of all crack projections in the longitudinal direction achieves full coverage of the development unit. If full coverage is achieved, determine whether the inter-crack seepage field of the development unit achieves full coverage of the development unit. If all conditions are met for full coverage, further determine whether there is stress interference between the seams in the plane. If there is no stress interference, obtain a fabric seam method that provides full longitudinal coverage and full utilization of the seams in the plane.

2. The method for optimizing the fracturing fracture layout in shale oil deviated wells according to claim 1, characterized in that, The well is vertically divided into development units, a simulation model is constructed, and based on the simulation model, the fracturing operation parameters and material performance parameters for each fracture are determined, including: Based on geological and engineering characteristics, vertical development units are divided. Then, combined with well trajectories and stress profiles, simulation models are established using numerical simulation software to further obtain fracturing construction parameters and material performance parameters.

3. The method for optimizing the fracturing layout of shale oil deviated wells according to claim 2, characterized in that, Geological and engineering characteristics include: longitudinal span, thickness of each sublayer, thickness of interlayer, porosity of each sublayer, permeability, fluid characteristics, and stress differences between longitudinal reservoirs and interlayers in each sublayer segment; Well trajectory characteristics include the well deviation, azimuth, and logging data along the well trajectory of the section to be fractured. The logging data along the well trajectory includes gamma, density, sonic transit time, resistivity, and neutron porosity. Construction parameters include the fracturing cluster discharge rate, liquid volume, and sand volume, while material parameters include liquid type and viscosity.

4. The method for optimizing the fracturing fracture layout in shale oil deviated wells according to claim 1, characterized in that, Projecting each crack onto the longitudinal direction, iteratively determining whether the superposition of all crack projections in the longitudinal direction achieves full coverage of the development unit, including: When the longitudinal projection of each fracture along the well trajectory exceeds 90% of the longitudinal range of the development unit, it is considered a full coverage. If full coverage is achieved, it is determined whether the inter-fracture seepage field of any development unit fully covers the development unit. If full coverage is not achieved, the initial fracture spacing is reduced and the fracture height is re-simulated.

5. The method for optimizing the fracturing layout of shale oil deviated wells according to claim 4, characterized in that, When reducing the initial gap spacing, the gap is reduced to ΔCp1. If the condition is still not satisfied after traversing all iterations, the iteration ends and it is directly determined whether the inter-gap seepage field of any development unit achieves full coverage of the development unit.

6. The method for optimizing the fracturing layout of shale oil deviated wells according to claim 5, characterized in that, Determining whether the inter-slit seepage field of any development unit achieves full coverage of the development unit includes: Within a specific development unit, through model simulation, under the current fracturing construction parameters and materials, within a set time, it is determined whether the seepage field between the fractures can achieve full coverage. If full coverage is achieved, it is determined whether there is stress interference between the fractures in the plane. If full coverage between the fractures in the plane is not achieved, the initial spacing is reduced, and the fracture height of each fracture is re-simulated. When reducing the initial fracture spacing, the spacing is reduced to ΔCp2, where ΔCp2 is less than ΔCp1. If the condition is still not met after traversing all iterations, the iteration ends and it is directly determined whether there is stress interference between the fractures in the plane.

7. The method for optimizing the fracturing layout of shale oil deviated wells according to claim 6, characterized in that, If all conditions are met for full coverage, further assessment is needed to determine whether stress interference exists between seams in the plane. If no stress interference is found, a fabric seaming method is obtained that provides full longitudinal coverage and full utilization of seams in the plane, including: If the result indicates stress interference between the seams in the plane, the initial spacing is increased, and the seam height is simulated. If the result indicates no stress interference between the seams in the plane, the current seam arrangement achieves full longitudinal coverage and full utilization of the seams in the plane. The criterion for determining whether stress interference exists between the seams in the plane is that, through simulation of the stress field on the model, stress interference exists when the stress between the seams is 15% higher than the initial value. The spacing is increased by ΔCp3, where ΔCp3 is less than ΔCp2. If the condition is still not met after traversing all iterations, the iteration ends.

8. A shale oil deviated well fracturing fracture optimization system, characterized in that, include: The model building module is used to divide the well into development units in the vertical direction, build a simulation model, and determine the fracturing construction parameters and material performance parameters for each fracture based on the simulation model. The model simulation module is used to initialize the fracture spacing based on the fracturing construction and evaluation results of adjacent wells, and to simulate the fracture height of each fracture through the simulation model and the fracturing construction parameters and material performance parameters of each fracture. The iterative judgment module is used to project each crack onto the longitudinal direction and iteratively judge whether the superposition of the projections of all cracks in the longitudinal direction achieves full coverage of the development unit. If full coverage is achieved, it judges whether the inter-crack seepage field of the development unit achieves full coverage of the development unit. The output module is used to determine whether there is stress interference between the seams in the plane if the full coverage is satisfied. If there is no stress interference, the fabric seam method with full longitudinal coverage and full use of the seams in the plane is obtained.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the shale oil deviated well fracturing fracture optimization method as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the shale oil deviated well fracturing fracture optimization method as described in any one of claims 1 to 7.

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