A Discrete Fracture Modeling Method Based on Multi-scale Factor Constraints

A technology of discrete fractures and modeling methods, applied in the field of fracture modeling, it can solve problems such as poor accuracy and large limitations, and achieve the effect of solving complexity

Inactive Publication Date: 2017-11-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the main purposes of the present invention is to solve the problems of large limitations and poor precision of the existing technology, and provide a comprehensive discrete fracture modeling method based on multi-scale factor constraints

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Discrete Fracture Modeling Method Based on Multi-scale Factor Constraints
  • A Discrete Fracture Modeling Method Based on Multi-scale Factor Constraints
  • A Discrete Fracture Modeling Method Based on Multi-scale Factor Constraints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] The present invention intends to take the KX gas field in the Kuqa Depression as an example to develop the modeling and design of fine reservoir fractures. Firstly, the detailed fracture space parameters are obtained by means of field outcrop, drilling core, CT scanning and microscope observation; secondly, Using the improved Sobel operator-based directional boundary filtering technology to obtain low-order sequence faults and lateral accommodation faults, use the deterministic method to establish large and medium-scale fracture models, and analyze faults, folds, lithology, thickness, reservoir physical properties, Controlling effect of interlayer frequency on fracture development, establish fault and fold coupling control fracture development model, predict fracture distribution range based on rock mechanics method and fold curvature method, use entropy weight method to optimize main controlling factors and obtain corresponding weights, and establish fracture development...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides a discrete fracture modeling method based on multi-scale factor constraints. The steps are as follows: finely identify and describe the fracture parameters of a single well; establish a fault-fold-fracture symbiotic evolution system based on the statistical fracture parameters, and determine the key fracture-making period ; Quantitative calculation of fracture parameters based on fine structural stress field simulation; optimization of main controlling factors for fracture development; optimization of weight of main controlling factors for fractures by entropy weight method; establishment of multi-scale fracture DFN model constrained by multiple factors; establishment of dual-porosity and dual-permeability reservoir geological model . In the present invention, through fine description of fractures in a single well based on CT scanning, the mutual control and influence between multi-scale fractures is analyzed, multiple geological factors such as structure and sedimentation control fracture development, and the entropy weight method is used to optimize the main controlling factors of fracture development, and a large scale is established. Large-scale, mesoscale, and small-scale fracture discrete models form a set of ideas and methods for establishing a fine fracture geological model, which provides an important basis for the efficient development and program optimization of fractured oil and gas reservoirs.

Description

technical field [0001] The invention relates to the field of fracture modeling, in particular to a discrete fracture modeling method based on multi-scale factor constraints. Background technique [0002] Reservoir fractures are an important research content in the production and development of oil and gas fields, and a lot of research has been done on the identification and modeling of reservoir fractures. Traditional geological analysis and estimation methods describe outcrops, cores, and thin sections, but are limited to rock surface phenomena due to human factors. Although the geophysical research methods based on logging identification and seismic identification are rich in information, the accuracy of identification is greatly affected by the data. Fold curvature method and fractal method are only used for brittle fold formations. At present, the relatively widely used fracture mechanics simulation method is to simulate the stress field by establishing a mechanical mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01V99/00
Inventor 冯建伟高长海
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap