Study on the salt-rock fractal tortuosity model and characterization relationship of permeability

Deng Linsheng●Xue Dongjie●Zhou Hongwei

Abstract

The tortuosity is a key parameter to describe the percolation channel and solve the geometrical representation and theoretical expression of permeability. In micro-nano fracture network media such as salt rocks, the study of permeability of low-permeability salt rock is more complicated. In order to study the permeability of micro-nano fracture network media, this paper derives the relationship between capillary pressure, mercury saturation, and tortuosity with the Hagen-Poiseuille equation and uses the mercury injection data to calculate the tortuosity of salt rock. The results which established the relationship between tortuosity, permeability, and porosity are compared with those of previous researchers. Introducing the fractal dimension and defined fractal tortuosity coefficient as the product of tortuosity and fractal tortuosity dimension. The relationship between the fractal tortuosity coefficient and the permeability is summarized in this paper, and there is a linear relationship between the two. The results can provide a reference for the study of the permeability of micro-nano fracture network media. © 2018, Editorial Office of Journal of Liaoning Technical University. All right reserved.

引用格式：

邓淋升, 薛东杰, 周宏伟. 盐岩分形迂曲度模型与渗透率表征研究[J].辽宁工程技术大学学报(自然科学版), 2018, 37(06):893-898. (Deng Linsheng, Xue Dongjie, Zhou Hongwei. Study on the salt-rock fractal tortuosity model and characterization relationship of permeability[J], Journal of Liaoning Technical University(Natural Science), 2018, 37(06):893-898.)

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