A New Method for Calculating Permeability of Sandstone Reservoir

doi:10.11885/j.issn.1674-5086.2019.03.01.01

Abstract

Abstract: Reservoir permeability is an important parameter in oilfield development. It is the basis for determining reasonable exploitation scheme, optimizing completion perforation scheme and selecting the optimal drainage position. The common core statistical analysis method is of errors in permeability calculation and is of a small scope of theoretical applicability. To solve this problem, based on the serial capillary model, the mathematical relationship between reservoir microstructure parameters and porosity, permeability and formation factors is theoretically derived. The mathematical and physical equations of pore throat diameter ratio are established, and the theoretical calculation model of permeability based on porosity, pore throat diameter ratio and throat diameter reservoir microstructure parameters is established, and the micro physical influencing factors of permeability are clarified. Based on core experiment, logging data and permeability theoretical model, a new permeability calculation method is established. The results show that the permeability calculation results are in good agreement with the core analysis results, and meet the needs of accurate evaluation of reservoir permeability. The results show that the permeability of reservoir is the macro characterization of the micro pore throat structure parameters from the mathematical and physical point of view, and the research results provide a new way for the permeability evaluation of reservoir development.

Key words: capillary model, permeability, pore throat diameter ratio, throat diameter

CLC Number:

TE311

YU Hua, LINGHU Song, WANG Qian, GUO Qingming, WU Ying. A New Method for Calculating Permeability of Sandstone Reservoir[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 125-132.

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