Recognition method of supracrustal rock pore filler

Abstract

The invention provides a recognition method of supracrustal rock pore filler. The recognition method of the supracrustal rock pore filler includes the steps that full-spectrum-plane analysis is performed on a field of vision, comprising the pore filler, on a surface to be measured of a rock sample to be measured, and an element composition energy spectrum diagram in the field of vision is obtained; energy-spectrum-plane scanning analysis is performed on elements contained in the element composition energy spectrum diagram in the field of vision so that plane distribution characteristic diagrams of all the elements can be obtained; according to the plane distribution characteristic diagrams of all the elements, the mineral species and distribution characteristics of the pore filler of the rock sample to be measured are recognized. By means of the recognition method, the mineral composition and distribution characteristics of the supracrustal rock pore filler can be accurately recognized.

Description

technical field [0001] The invention relates to cap rock evaluation technology in the field of petroleum geological exploration, in particular to a method for identifying cap rock pore and fracture fillings. Background technique [0002] In petroleum geological exploration technology, the identification of cap rock components, especially the identification of the components of pore and fracture fillings, is the most basic research content in cap rock evaluation. It is of great significance (Wu Lirong et al., Discovery and significance of matrix pores in high-efficiency bedrock gas reservoirs in saline lake basins, Journal of Earth Science and Environment, v37, n3, p.54-62, 2015; Ma Feng et al., Qaida Characteristics of bedrock gas reservoirs in Dongping area, Mu Basin, Petroleum Exploration and Development, v42, n3, p.266-273, 2015). Existing exploration practice shows that the caprock that can effectively seal oil and gas in the underlying reservoir usually has a certain d...

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Problems solved by technology

[0003] In the prior art, scholars generally use polarizing microscopes to identify rock pore fillings. The specific method is: grind rock samples into thin slices of 0.03mm, and use polarizing microscopes to identify the thin slices (National Petroleum and Chemical Industry Bureau, SY / T5368-2000 rock thin section is firm, p.1-28, 2000), mineral types are identified based on the crystal optical characteristics of minerals, but this optical characteristic identification sometimes has multiple solutions (Wang Xiang, Crystal Optics, Nanjing University Press , 2014), for these minerals that cannot be accurately identified by optical features, scholars usually conduct further electronic probe analysis to confirm the elemental composition of the minerals. Electron probe analysis has the advantage of high-precision elemental analysis in the micro area (General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, GB / T15074-2008 General Rules for Quantitative Analysis Methods of Electronic Probes, p.1-8, 2008), can accurately test its elemental composition on the micro-area probe points, but cannot judge The extension and distribution characteristics of these minerals with exactly the same elemental composition in the untested area

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