# 二维裂隙密度及其渗透率的逾渗关系研究Study of the Percolation Relationship between Fracture Density and Permeability of 2-D Facture Networks

DOI: 10.12677/APF.2013.33006, PDF, HTML, XML, 下载: 3,487  浏览: 12,368  国家科技经费支持

Abstract: Fracture networks strongly influence oil migration in reservoirs, especially in low-permeability reservoirs. So the parameter of fracture permeability plays an important role during the exploration of oil and gas fields. Simplifying the fracture network of reservoirs, and continuum percolation theory are successfully applied for studying the fracture permeability in deep and complex media. By using excluded area to dimensionless the fracture density, macroscopic properties of fracture networks become independent of fracture shape. Using Monte Carlo simulation, the facture net-work with different fracture density is obtained, and then based on continuum percolation theory and finite element analysis software, called COMSOL Multiphysics, we get the relationship between dimensionless density and macro-scopic permeability, which is scaling law. The simulated results may offer a simple and practical method to evaluate frac-ture permeability quantitatively and enhance the applications of percolation theory in the exploration of oil and gas fields.

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