Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Quantitative characterization and parameter acquisition method for reservoir and seepage space of shale oil reservoir

A technology for quantitative characterization and parameter acquisition, applied in permeability/surface area analysis, measurement devices, surface/boundary effects, etc., to achieve process controllable and representative effects

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems existing in the characterization of the microscopic pore structure of shale reservoirs, generate a more representative porous media model, and provide a method for quantitative characterization and parameter acquisition of shale oil reservoir storage and seepage space

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
  • Quantitative characterization and parameter acquisition method for reservoir and seepage space of shale oil reservoir
  • Quantitative characterization and parameter acquisition method for reservoir and seepage space of shale oil reservoir
  • Quantitative characterization and parameter acquisition method for reservoir and seepage space of shale oil reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for quantitative characterization and parameter acquisition of shale oil reservoir storage and seepage space, such as figure 1 shown, including the following steps,

[0043] S1. Obtain the image information of the real core of the shale reservoir in the target area, and process it to obtain numerical information; process the numerical information to obtain the statistical characteristics of the microscopic pore structure of the storage and seepage space.

[0044] In this embodiment, the image information is acquired by a scanning electron microscope imaging method, and an SEM image of the target rock core is obtained. After the SEM image of the target core is obtained, the image information is numerically processed to obtain numerical information, that is, the image information of the real core is binarized by the maximum inter-class error method to obtain numerical information.

[0045] The maximum inter-class error method divides the image into two parts, th...

specific Embodiment approach

[0073] In this example, the middle and lower Jurassic Qianer Member shale oil reservoir cores in northern Sichuan are selected to provide a specific implementation method for quantitative characterization of shale oil reservoir storage and seepage space and parameter acquisition method, including the following steps:

[0074] (1) Select the shale core in the target area and interval, scan it with a scanning electron microscope and obtain the required image.

[0075] (2) Using MATLAB software, the maximum between-class variance method is used to numerically process the SEM image of the core to obtain the statistical characteristics, that is, the distribution characteristics of the pore structure and pore morphology. Figure 4 The results shown.

[0076] (3) Determine the number of three-dimensional grids that need to generate the porous medium model as 200×200×200, the resolution is 25nm / pixel, and the porosity is 11%. Based on the four-parameter random growth model, the porou...

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 invention discloses a shale oil reservoir reservoir seepage space quantitative characterization and parameter acquisition method. The method comprises the following steps: S1, acquiring image information of a real rock core of a shale reservoir in a target area, and processing the image information to obtain statistical characteristics of a micro-pore structure of a reservoir-seepage space; s2, generating a porous medium model based on the statistical characteristics and multi-level constraints; s3, obtaining characteristic parameters of the porous medium model, wherein the characteristic parameters comprise pore connectivity, pore size, pore morphology and porosity; and S4, performing fluid flow simulation in the porous medium model to obtain the apparent permeability of the fluid in the seepage of the porous medium model. The method has the technical effect that the porous medium model with higher representativeness and finer performance can be obtained.

Description

technical field [0001] The invention relates to the field of oil and gas development, in particular to a quantitative characterization and parameter acquisition method for storage and seepage space of shale oil reservoirs. Background technique [0002] Shale reservoirs are characterized by ultra-low porosity, low permeability, and strong heterogeneity. The micro-nano pores are the main space for oil and gas storage and seepage. Therefore, the microscopic pore structure and fluid migration characteristic parameters of the storage-seepage space are obtained. The basis for carrying out reservoir evaluation. [0003] The traditional core experiment method cannot realize the visual representation of the pore microstructure, nor can it obtain the fluid dynamic seepage process. Nano-CT scanning, FIB-SEM and other technologies emerging in recent years can directly obtain images of the internal pore structure of shale cores, but due to factors such as strong reservoir heterogeneity,...

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 Applications(China)
IPC IPC(8): G01N13/04G01N15/08G01Q30/02G01Q30/04
CPCG01N13/04G01N15/08G01N15/0826G01N15/088G01Q30/02G01Q30/04
Inventor 郭彤楼符东宇王勇飞李毓赵爽黎静容冯晓明吴亚军颜晓姜金兰杨嘉琪任世林
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com