Abstract

Accurately characterizing the morphology and resistivity characteristics of microfractures in shale oil reservoir is of great significance to the efficient development of shale oil. According to the scanning electron microscope (FIB-SEM) image of rock sample of the Jimusar shale oil reservoir, the pore and micro fracture structure information of shale is obtained by BP neural network segmentation method. In this paper, the refined three-dimensional digital core of shale with fracture matrix pore dual medium is reconstructed by using the improved four parameter growth method and two-dimensional fractional Brownian motion model. Finally, the effective resistivity of digital core under different fracture parameters is simulated and calculated by finite element method, and the variation law of digital core resistivity under different wettability and fracture arrangement is analyzed. The research results have theoretical significance for the construction and electrical simulation of fractured digital core.

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