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CN-122017956-A - Reservoir model construction method based on fracture segmentation fine analysis

CN122017956ACN 122017956 ACN122017956 ACN 122017956ACN-122017956-A

Abstract

The invention provides a reservoir model construction method based on fracture segmentation fine analysis, and belongs to the technical field of geological information processing. The method comprises the following steps of S1, fracture segmentation research, S2, segmentation internal reservoir characteristic analysis and segmentation internal reservoir characteristic analysis results, S3, reservoir fracture-reservoir characteristic analysis, wherein a fracture-reservoir space structure mode is built based on the segment internal reservoir characteristic analysis results obtained in the step S2, a main reservoir space is clear, and reservoir fracture-reservoir characteristics are obtained, and S4, reservoir model building is performed, namely a fracture control fracture-cavity type reservoir internal structure model is built based on fracture segmentation research results obtained in the step S1 and the reservoir fracture-reservoir characteristics obtained in the step S3. The invention solves the bottleneck problems that the prior model construction method is difficult to cope with the rapid change of the characteristics of the reservoir structure caused by the fracture properties, the stress conditions and the fracture development strength of different fracture sections, and the reservoir structures of different well sections are not known clearly.

Inventors

  • CAO FEI
  • PENG XIAOPING
  • ZHANG KAI
  • HE XINMING
  • LI XIAOBO

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司西北油田分公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (16)

  1. 1. A reservoir model construction method based on fracture segmentation fine analysis is characterized by comprising the following steps: s1, researching fracture segmentation; S2, segmenting internal reservoir characteristic analysis, and segmenting an internal reservoir characteristic analysis result; s3, reservoir body fracture-storage characteristic analysis, namely constructing a fracture-storage space structure mode based on the segment internal reservoir characteristic analysis result obtained in the step S2, and defining a main reservoir space to obtain reservoir body fracture-storage characteristics; And S4, building a reservoir model, namely building a fracture-controlled fracture-cavity type reservoir internal structure model based on the fracture segmentation research result obtained in the step S1 and the reservoir fracture-storage characteristics obtained in the step S3.
  2. 2. The reservoir model building method according to claim 1, wherein step S1 comprises the steps of: S101, analyzing the fracture continuity characteristics of the region; S102, analyzing a cross-well seismic plane profile on the basis of the area fracture continuity characteristics obtained in the step S101 to obtain stress characteristics; s103, classifying the real drilling stress state according to the stress characteristics obtained in the step S102; S104, determining real drilling plane distribution characteristics and area fracture continuity according to the classification result in the step S103; S105, analyzing inter-well connectivity by combining dynamic data according to the real drilling plane distribution characteristics and the regional fracture continuity determined in the step S104, and segmenting a fracture zone; S106, analyzing the static data features through continuous equidistant seismic profile analysis on the basis of the inter-well connectivity obtained in the step S105.
  3. 3. The method for constructing a reservoir model according to claim 2, wherein the step S101 is specifically to analyze the regional fracture continuity characteristics based on the fracture attribute characteristics and the seismic time migration profile under the constraint of the regional fracture development macroscopic rule, and divide the regional fracture continuity characteristics into a splicing section, a bridging section and a translation section.
  4. 4. A reservoir model building method according to claim 3, wherein the fracture attribute features comprise coherence features and ant body features.
  5. 5. The reservoir model construction method according to claim 2, wherein step S102 is specifically that on the basis of the area fracture continuity characteristics obtained in step S101, statistical analysis is performed on the stress state, the abnormal body development scale and the fracture penetration depth of the real well drilling reservoir, and the through well seismic flat profile is analyzed to obtain stress characteristics.
  6. 6. The reservoir model building method of claim 2, wherein in step S103, the categorized categories include squeeze, translate, and pull-out.
  7. 7. The reservoir model construction method according to claim 2, wherein in step S105, the dynamic data includes inter-well interference well test, water injection gas injection response and tracer response characteristics, and the segments include an extrusion segment, a pull segment and a translation segment.
  8. 8. The method of reservoir model construction according to claim 2, wherein in step S106, the continuous equidistant seismic profile analysis includes a continuous equidistant seismic profile analysis parallel to a fracture strike profile and a continuous equidistant seismic profile analysis perpendicular to a fracture strike, and the static data features include stress state, penetration depth, and fracture extent of the fracture.
  9. 9. The method for constructing a reservoir model according to claim 1, wherein the step S2 comprises the steps of continuously intercepting the seismic section from the fracture end to the fracture core in different sections, analyzing the fracture development characteristics and the fracture degree by combining the real drilling data, the production characteristics of the well and the related dynamic test data, summarizing the reservoir development rule, and analyzing the characteristics of the reservoir in the sections.
  10. 10. The reservoir model building method according to claim 9, wherein in step S2, the real drilling data includes logging interpretation, well shock calibration and acoustic remote detection, and the analysis of fracture development characteristics includes lateral development characteristic analysis and longitudinal development characteristic analysis.
  11. 11. The reservoir model construction method according to claim 1, wherein in the step S4, the construction is specifically performed by analyzing stress characteristics, structural fracture degrees and seismic reflection characteristics of different parts of different segments and combining field geological outcrop and well test data.
  12. 12. A reservoir model constructed by the reservoir model construction method of any of claims 1-11.
  13. 13. Use of the reservoir model construction method according to any of claims 1-11 for reservoir model construction based on fracture segmentation fine resolution.
  14. 14. A device for reservoir model construction based on fracture segmentation fine analysis for implementing the reservoir model construction method according to any one of claims 1 to 11, characterized by comprising: The device comprises a module 1, a fracture segmentation research module; the module 2 is used for obtaining the characteristic analysis result of the segmented internal reservoir; The module 3, the storage body break-storage characteristic analysis module, is used for constructing the structure mode of the break-storage space based on the analysis result of the internal storage layer characteristic of the section transmitted from module 2, clear the main storage space, get the storage body break-storage characteristic; And the module 4 is used for building a fracture-controlled fracture-cavity type reservoir internal structure model based on fracture segmentation research results transmitted from the module 1 and reservoir fracture-storage characteristics transmitted from the module 3.
  15. 15. An electronic device, the electronic device comprising: A memory storing executable instructions; A processor executing the executable commands in the memory to implement the reservoir model building method of any of claims 1-11.
  16. 16. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the reservoir model construction method of any of claims 1-11.

Description

Reservoir model construction method based on fracture segmentation fine analysis Technical Field The invention belongs to the technical field of geological information processing, and relates to a reservoir model construction method based on fracture segmentation fine analysis. Background Early cold Wu Shi-middle o Tao Shi are widely distributed with large carbonate sedimentary layers, a long-term low geothermal environment provides hydrocarbon production conditions for hydrocarbon source rocks of the next cold arm system, a large amount of mudstones of late o Tao Shi serve as a reservoir layer, and therefore a complete reservoir cover combination is formed, and investigation in the last ten years shows that middle and lower o Tao Tong carbonates and chills are key areas of oil and gas exploration and are influenced by multi-stage construction movements, so that two sets of trunk sliding fracture and a plurality of secondary fractures are formed. For areas with obvious fracture segmentality, the space spread of the fracture-controlled fracture-cave reservoir is obviously constrained by the boundary of the fracture zone. The geological model capable of meeting the description requirement of the oil deposit and reflecting the production dynamic data and the reservoir storage and seepage characteristics is created, and has important significance for the promotion of the development work of the oil deposit. Chinese patent CN106570262B provides a description method of a reservoir configuration structure, which uses the reservoir configuration structural feature parameters of a target reservoir to divide the reservoir configuration structures of all single wells in the target reservoir in a target zone into multi-stage reservoir configuration structures, and establishes a reservoir communication relationship for characterizing the multi-stage reservoir structures between wells covering the target reservoir according to the stable mudstone mark developed at the top of the target reservoir, so as to quantitatively describe the configuration structural feature of the target reservoir. The method has high precision and has important guiding significance for fine development of oil reservoirs. Chinese patent CN112814653A provides a fracture-cavity type oil reservoir structure judging method, which is used for establishing a water injection indicating curve between injection pressure of a fracture cavity and accumulated injection quantity, an energy indicating curve between bottom hole pressure and accumulated liquid production quantity, a liquid level recovery curve between static liquid level and time and a well test indicating curve between pressure and time, acquiring curve morphological characteristics of the water injection indicating curve, the energy indicating curve, the liquid level recovery curve and the well test indicating curve, judging the reservoir structure according to the curve morphological characteristics, and can quickly and accurately judge the reservoir structure, so that the method has important guiding significance for carrying out water injection high-pressure cause analysis on the fracture-cavity type oil reservoir and making a fracture-cavity type oil reservoir high-pressure water injection technology. Chinese patent CN115437013A provides a small-slippage-distance sliding fracture analysis method, medium and equipment for oil reservoirs, wherein the method comprises the steps of carrying out seismic attribute fracture identification based on three-dimensional seismic data, determining macroscopic distribution and internal curtain structural characteristics of sliding fracture, carrying out seismic profile interpretation, determining fracture structure patterns, combination characteristics and spatial distribution rules, carrying out three-dimensional visual display on seismic profile interpretation results based on the fracture structure patterns, the combination characteristics and the spatial distribution rules, obtaining fracture stage difference activities, fracture zonal difference activities and fracture stage difference activities, establishing a sliding fracture three-dimensional model, and obtaining favorable development areas of fracture-controlled reservoirs based on the sliding fracture three-dimensional model. The technology establishes the three-dimensional model of the sliding fracture, identifies the favorable development area of the fracture-controlled reservoir body from the three-dimensional model of the sliding fracture, effectively avoids the multiple solutions and the uncertainty of the construction interpretation result, and has stronger theoretic property, practical property and operability. However, the prior art does not provide a reservoir structure feature research and related model construction method based on reservoir segment fine resolution. Disclosure of Invention In view of the above, the present invention aims to provide a reservoir model construction meth