Method for representing carbonate rock non-compositionality selective reservoir spaces

Abstract

The invention provides a method for representing carbonate rock non-compositionality selective reservoir spaces. The method includes steps of 1, carrying out total rock core X-ray three-dimensional scanning tests on samples and forming two-dimensional grayscale images; 2, analyzing and processing two-dimensional grayscale slices of the scanned samples and recognizing fracture and pore developmentfeatures of the samples by the aid of threshold segmentation processes; 3, carrying out multi-scale fusion by the aid of processes for direct construction on the basis of grayscale images and processes for construction on the basis of pore network models, then implementing visualization and building three-dimensional space models; 4, representing the carbonate rock non-compositionality selective reservoir spaces and analyzing pore structures; 5, quantitatively representing reservoir spaces of the samples and outputting charts, maps and data. The method for representing the carbonate rock non-compositionality selective reservoir spaces has the advantages that multi-scale and continuous research on rock cores can become reality by the aid of the method, and detailed stratum cognition materials can be provided to geological workers.

Description

technical field [0001] The invention relates to the technical field of oil field exploration and development, in particular to a method for characterizing the non-fabricated selective storage space of carbonate rocks. Background technique [0002] Special reservoirs such as carbonate rocks have complex spatial structures, uneven distribution of pores, various types, and large continuous characteristic scales. They are important reservoir types, but for carbonate rock reservoirs, especially The test and description of unfabricated selective reservoir space has always been a difficult problem for geologists. Due to the large continuity scale of carbonate rocks (often up to 1 meter to several meters), the sample size of the laboratory core plunger is small, and the representativeness of the analysis results is poor. The data analyzed by the samples cannot truly reflect the pore information of the rock. It has brought great difficulties to the reservoir evaluation and reserve c...

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Problems solved by technology

[0002] Special reservoirs such as carbonate rocks have complex spatial structures, uneven distribution of pores, various types, and large continuous characteristic scales. They are important reservoir types, but for carbonate rock reservoirs, especially The test and description of unfabricated selective reservoir space has always been a difficult problem for geologists

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