Simulated flow model of fractured anisotropic media: Permeability and fracture

摘要

This paper is typically studied the fracture flow in the anisotropic media in consider with the stress sensitivity of permeability. Combined with anisotropy percolation characteristics of permeability, laboratory full tensor permeability test method is established by means of the expandable polystyrene (EPS) cystosepiment, and the non-linear flow physical simulation in fractured anisotropic media is studied. Through numerical calculation and physical experiment, the variation mechanism of full tensor permeability with stress sensitivity in fractured anisotropic media is revealed. Based on percolation theory, tensor theory and coordinate transformation principle, the full permeability tensor model for single and multiple group fracture is presented. It is extended to the reservoir in situ condition, and the mathematical model of the full tensor permeability for multiple group and pressure-sensitive fractured anisotropic media is established. The results have a significant impact in understanding the seepage law in the fracture.