The Study Of The Equivalent Permeability And Its Influencing Factors With Considering Media Deformation In Fracture-Vuggy Reservoir

The fracture-vuggy medium is composed of a matrix and a wide range of complex fracture-vuggy systems,which is large different in the type of flow medium and the scale.The formation stress state is complicated.With the flowing due to press gradient,the press distribution has been changed in medium,which leads to the deformation in Stokes area.This deformation has a certain effect on the seepage capability of the medium.Base on the flowing law in fracture-vuggy medium,combining with the stess-strain relationship,the article study the influence of the seepage ability of the fracture-vuggy medium in different production condition and the form and distribution of fracture and cave.Specifically,the study include is as follows.First,the mathematical model is established,which is basing on the Darcy-Stokes equations and combining with the stess-strain law.And then,based on the mathematical model,the article study the influence of single fracture or cave model's seepage ability under the stress field with the different form of fracture and cave.And then,the method of modeling the random fracture-vuggy medium,Monte Carlo method,is established.The article study influence of random model's seepage ability under the stress field with the different distribution of fracture and cave.Finally,the article simulates the production well's condition in different injection press and study the development mode which is applied to the fracture-vuggy reservoir.