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Shale gas reservoir character prediction method

A technology for property prediction and shale gas reservoirs, applied in measuring devices, suspension and porous material analysis, scientific instruments, etc., can solve the difficult and complex problems of shale three-dimensional digital core porosity and intrinsic permeability, and achieve operational simple effect

Inactive Publication Date: 2014-12-17
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a shale gas method for predicting the porosity and intrinsic permeability of the three-dimensional digital core of shale in order to solve the existing research to detect the porosity and intrinsic permeability of the three-dimensional digital core of shale. Possessive Properties Prediction Method

Method used

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Effect test

Embodiment 1

[0047] A shale gas reservoir property prediction method, the prediction method comprising the following steps:

[0048] a) Select the shale medium, use synchrotron radiation to scan the shale medium, obtain the three-dimensional volume data of the shale medium, perform noise processing on the three-dimensional volume data of the shale medium, and then identify pores and solid skeletons, and use the pore tracking method to obtain pore channels , use the recursive method to obtain the connectivity between pores, and establish a connected network of pores; use the isosurface extraction method to visualize the pores; use the obtained pore wall data to reconstruct the pore wall surface using mathematical methods, and then reconstruct the shale gas occurrence The three-dimensional structure of the medium;

[0049] b) Three-dimensional virtual reconstruction of shale gas occurrence medium: determine the input and training images according to the multi-point statistical method, and ca...

Embodiment 2

[0055] A shale gas reservoir property prediction method, the prediction method comprising the following steps:

[0056] a) Select the shale medium, use synchrotron radiation to scan the shale medium, obtain the three-dimensional volume data of the shale medium, perform noise processing on the three-dimensional volume data of the shale medium, and then identify pores and solid skeletons, and use the pore tracking method to obtain pore channels , use the recursive method to obtain the connectivity between pores, and establish a connected network of pores; use the isosurface extraction method to visualize the pores; use the obtained pore wall data to reconstruct the pore wall surface using mathematical methods, and then reconstruct the shale gas occurrence The three-dimensional structure of the medium;

[0057] b) Three-dimensional virtual reconstruction of shale gas occurrence medium: determine the input and training images according to the multi-point statistical method, and ca...

Embodiment 3

[0064] A shale gas reservoir property prediction method, the prediction method comprising the following steps:

[0065] a) Select the shale medium, use synchrotron radiation to scan the shale medium, obtain the three-dimensional volume data of the shale medium, perform noise processing on the three-dimensional volume data of the shale medium, and then identify pores and solid skeletons, and use the pore tracking method to obtain pore channels , use the recursive method to obtain the connectivity between pores, and establish a connected network of pores; use the isosurface extraction method to visualize the pores; use the obtained pore wall data to reconstruct the pore wall surface using mathematical methods, and then reconstruct the shale gas occurrence The three-dimensional structure of the medium;

[0066] b) Three-dimensional virtual reconstruction of shale gas occurrence medium: determine the input and training images according to the multi-point statistical method, and ca...

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Abstract

The invention relates to a shale gas reservoir character prediction method. In the method, scanning lines in the horizontal direction are formed through focusing by a reflective mirror in a mirror box with a synchrotron radiation light source. Vertical scanning is achieved through rotating vibration of the reflective mirror for obtaining micro-structure three-dimensional data of a shale gas occurrence porous sample. Three-dimension reconstruction is carried out to the obtained micro-structure three-dimensional data and porosity and an inherent permeability of a shale three-dimensional digital rock core are obtained through calculation in a manner of coupling between molecular dynamics and crystal lattice Boltzmann method and are expressed by mathematic expressions. In the invention a synchrotron radiation light and a computer technology are employed for researching the porosity and the inherent permeability of the shale three-dimensional digital rock core. The method is economic and environmental-protective, is easy to operate, can provide required important evaluation parameters for exploration and development of shale gas, can predict an adsorption / desorption principle of free gas and adsorbed gas in the shale gas, can be used for researching the porosity and the inherent permeability of the shale three-dimensional digital rock core, and provides technical support for development of the shale gas.

Description

technical field [0001] The invention relates to a shale gas reservoir characteristic prediction method, in particular to a shale gas reservoir characteristic prediction method for predicting and studying the porosity and intrinsic permeability of a shale three-dimensional digital core. [0002] Background technique [0003] Shale gas is a very important unconventional natural gas resource extracted from shale formations. The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thicker and widely distributed shale hydrocarbons in the basin. in the source layer. Compared with conventional natural gas, shale gas development has the advantages of long mining life and long production cycle. Most gas shales are widely distributed, thick and generally contain gas, which enables shale gas wells to produce at a stable rate for a long time. gas. [0004] Shale gas has unique storage characteristics, and free gas and adsorbed gas c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 许友生范世炜周鑫发朱剑平
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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