Microseismic data assisted tight oil and gas reservoir fracture distribution inversion method

A technology of oil and gas reservoirs and micro-seismic, applied in seismology, seismic signal processing, earthwork drilling and production, etc., to achieve the effect of improving accuracy

Active Publication Date: 2020-05-19
PEKING UNIV
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the inversion problem of fracture distribution in tight oil and gas reservoirs (here, inversion refers to using inverse problem modeling technology to deduce un

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
  • Microseismic data assisted tight oil and gas reservoir fracture distribution inversion method
  • Microseismic data assisted tight oil and gas reservoir fracture distribution inversion method
  • Microseismic data assisted tight oil and gas reservoir fracture distribution inversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] In the following, the present invention will be further explained through specific embodiments in conjunction with the drawings.

[0038] The microseismic data-assisted inversion method of tight oil and gas reservoir fracture distribution in this embodiment, such as Image 6 As shown, including the following steps:

[0039] 1) Obtain microseismic data:

[0040] The schematic diagram of the reservoir block with fracture distribution is as follows figure 1 As shown, the surface microseismic signal monitor and data interpretation system are used to obtain microseismic data indicating the location of tight oil and gas reservoir fractures, such as figure 2 Shown; the location of the crack is continuous, but from figure 2 It can be seen that the microseismic data is discrete. Although the location of the crack cannot be directly obtained from the microseismic data, the preliminary possibility of the location of the crack can be obtained;

[0041] 2) Obtain the initial statistical p...

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 microseismic data assisted tight oil and gas reservoir fracture distribution inversion method. According to the method, Hough transform is adopted to transform microseismic data into Hough space, so that a Hough space function can be obtained, and an initial mean value of a Hough space random field can be formed; the sampling of crack distribution in a physical space is generated by adopting Hough inverse transformation; production prediction data corresponding to sampling of crack distribution in a physical space is predicted through numerical simulation; a correlation matrix of the Hough space random field and the production prediction data is obtained by adopting an algebraic statistical method; the posterior probability of the Hough space random field is maximized by using the correlation matrix and adopting a sample set-based iterative algorithm to form a crack distribution inversion method. According to the method, the precision of tight oil and gas reservoir fracture distribution inversion and development well production prediction can be improved.

Description

Technical field [0001] The invention relates to petroleum exploitation technology, in particular to a method for inversion of crack distribution in tight oil and gas reservoirs assisted by microseismic data. Background technique [0002] Due to the extremely low permeability of the reservoir, the economic development of tight oil and gas reservoirs generally requires horizontal drilling and multi-stage fracturing technology. Fractures formed by fracturing have high conductivity and can provide effective channels for oil and gas flow, which is the key to tight oil and gas reservoir development. Therefore, accurate inversion of tight oil and gas reservoir fracture distribution is the key to predicting oil and gas well production. [0003] In the prior art, the automatic history matching technology using oil and gas well production data is the main tool for inversion of oil and gas reservoir attributes. The automatic history matching technology is generally used to invert the permea...

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
IPC IPC(8): G01V1/30E21B43/26
CPCE21B43/26G01V1/306G01V2210/624
Inventor 常海滨姚梦碧
Owner PEKING UNIV
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