Method for analyzing pore structure of organic matter in Lower Paleozoic shale

Abstract

The present invention discloses a method for analyzing the pore structure of the organic matter in the Lower Paleozoic shale. The method comprises the following steps: performing optical scale and two-dimensional scanning electron microscopic observation, performing three-dimensional cutting reconstruction by selecting typical organic matters, and performing detailed observation and image acquisition on the pore structure of the target organic matter; and using image analysis software to quantitatively characterize the characteristic parameters such as the face rate, the pore size distribution, the porosity and the like of different organic matters. According to the method provided by the present invention, the pore morphology of the organic matter of the Lower Paleozoic shale can be accurately and reliably analyzed, so that the problem of quantitative analysis on the pore structure of the organic matter can be solved; and the method has important guiding significance for the study onthe pore structure of the organic matter in the Lower Paleozoic shale, and provides a better reference for the study of the organic matter in the Lower Paleozoic shale and the exploitation of the Lower Paleozoic shale gas.

Description

Technical field [0001] The invention relates to the field of rock physics research, in particular to a method for analyzing the pore structure of organic matter in the Lower Paleozoic shale. Background technique [0002] Organic pores are widely developed in organic-rich shale and are an important part of the shale reservoir space. Shale gas can be stored in the pores in a free state, or adsorbed on the surface of mineral particles and organic matter in an adsorbed state. The porosity of organic matter directly controls the content of adsorbed natural gas, and the distribution of pores controls the distribution of shale oil and gas. On the other hand, the type and degree of evolution of the original organic matter and the degree of development of the internal pores of the organic plasmids are the geological criteria for judging the commercial development value of the shale layer; the buried depth of the organic matter pores is the development condition for judging the commercial...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to solve the existing problems of difficulty in analyzing the organic matter pore structure of Lower Paleozoic shale, low analysis efficiency, large quantitative error, etc., and to provide a Lower Paleozoic shale Analysis method of organic matter pore structure in boundary shale

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