Construction and Analysis of Pore-Fracture Network Model of Carbonate Rock

doi:10.7657/XJPG20210115

Abstract

Abstract:

In order to study the microscopic flow mechanism of dual-porosity carbonate rock which contains both pore and fracture, a dual-porosity model should be built which can accurately characterize the pore-fracture system. We first constructed a digital rock model with a real pore-fracture system based on CT images and image segmentation technique before separating the fractures from the pores. Then centerline extraction and maximal ball methods were applied to construct a fracture network model and merge it with a pore network model into a pore-fracture network model. The porosity and absolute permeability calculated on the pore-fracture network model shows good agreement with the results from conventional property experiments. The pore-fracture network model can accurately characterize the real pore-fracture system of dual-porosity carbonate rock, and can be used to study microscopic flow mechanism.

Key words: carbonate dual-porosity media, CT imaging, image segmentation, digital rock model, pore network model, fracture network model

CLC Number:

TE344

LUO Yu, WANG Yin, WANG Rong, YUAN Wen. Construction and Analysis of Pore-Fracture Network Model of Carbonate Rock[J]. Xinjiang Petroleum Geology, 2021, 42(1): 107-112.

Figures/Tables 8

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