A method and device for acquiring pore structure

Abstract

The invention provides a pore structure obtaining method and device, and belongs to the technical fields of geological exploration and physical geography. The method comprises the steps: standardizing a rock sample; placing the standardized rock sample into a CT scanner, and carrying out X ray scanning to obtain first image data; according to the first image data, obtaining a target area of the first image data; according to the target area, extracting a target sample from the standardized rock sample; placing the target sample into a focused ion beam-field emission scanning electron microscopy system, and carrying out imaging scanning, to obtain second image data; and according to the second image data, obtaining a pore structure. The method can be used for acquiring and characterizing the pore structure of the rock sample and the pore structure of a specified area or an unclear area. The pore structure of rock is specifically and systematically acquired and characterized so as to accurately observe and study the pore structure in the rock sample and the dependence relationship between pores in the rock sample.

Description

technical field [0001] The present invention relates to the technical fields of geological exploration and geophysics, in particular to a method and device for obtaining pore structure. Background technique [0002] Shale gas is an unconventional oil and gas resource that mainly exists in shale pores in adsorbed and free states. Therefore, accurate characterization of shale pores plays an important role in determining the resource potential of shale gas. However, although there are a large number of characterization methods for shale pores at present, they mainly focus on how to determine the porosity of shale gas, and there is no corresponding acquisition or characterization method for the internal structure development characteristics of shale, so it is impossible to observe From the development characteristics and three-dimensional structure inside the rock, it is impossible to observe and study the pore structure in the rock systematically. This also makes it difficult ...

AI Technical Summary

Problems solved by technology

However, although there are a large number of characterization methods for shale pores at present, they mainly focus on how to determine the porosity of shale gas, and there is no corresponding acquisition or characterization method for the internal structure development characteristics of shale, so it is impossible to observe As far as the development characteristics and three-dimensional structure of the rock are concerned, the pore structure in the rock cannot be systematically observed and studied

This also makes it difficult for companies or researchers to study shale gas or other rock structures; if they cannot accurately obtain the pore structure inside the rock, they will not be able to understand the interdependence between shale gas and rock pores. limit the progress of research

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