Method and device for detecting pore type and effective porosity of carbonate rock

Abstract

The invention, which relates to the field of oil and gas reservoir evaluation, discloses a method and device for detecting the pore type and effective porosity of a carbonate rock. The method comprises: filling pores of a carbonate rock with fluorescent dye to obtain a casting body sample; scanning the casting body sample to obtain a multi-layer image and three-dimensional data; observing a planedistribution position and morphology of the cast body sample by using the multi-layer image; acquiring a spatial distribution location and morphology of the cast body sample by using the three-dimensional data; and extracting an effective pore volume of the cast body sample within a viewing range in the three-dimensional data and acquiring an effective porosity in the viewing range according to the effective pore volume and the volume of the cast body sample in the viewing range. Therefore, problems that the only the macroscopic average characterization parameters can be obtained at present but the micro characteristics of the pore structure cannot be obtained and the structural characteristics of the pore micro-region or individual pore cannot be analyzed are solved.

Description

technical field [0001] The present invention relates to the field of oil and gas reservoir evaluation, in particular to a method and device for detecting carbonate rock pore types and effective body porosity, especially to a laser confocal two-dimensional and three-dimensional detection of carbonate rock microscopic pore types and effective bulk porosity methods. Background technique [0002] At present, due to the global energy shortage and the increasing energy demand, the petroleum industry has carried out a lot of oil and gas exploration work in carbonate rock development areas, and carbonate rock reservoirs have gained more and more attention as unconventional oil and gas reservoirs. focus on. The main reservoir in the Tadong area is the Cambrian-Ordovician carbonate reservoir. This ancient deep-seated marine carbonate reservoir has experienced multi-stage and multi-type diagenesis. Therefore, the analysis of carbonate rock The type and development degree of microscop...

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Problems solved by technology

[0003] In view of this, the present invention provides a method and device for detecting the pore type and effective body porosity of carbonate rocks, so as to solve the problem that only the macroscopic average characterization parameters can be obtained at present, and the microscopic characteristics of the pore structure cannot be obtained, let alone the analysis of the pore microstructure. The problem of the structural characteristics of a zone or a single pore

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