Pressure Dynamic Analysis Of Vertically Fractured Well In Stress-Sensitive Formation

The production of low-permeability oil-gas reservoirs is always the technical difficulty in Petroleum Engineering.Because the Penetration-Flow Surrounding is bad,at present,only using Hydraulic Fracture can achieve a great deal of economical benefit.Well-Test,as an important method of knowing the reservoirs,is used widely in exploration and development in reservoirs.And it becomes an indispensable segment in obtaining exploration achievement. It also has special function in Fractured-Wells performance analysis.The effects of hydraulic fracturing depend on the understanding of the reservoirs.The Technology of vertical fractured-wells testing is the effective way to learn about the reservoirs and evaluate the quality of the construction.This paper is based on the basic theory of dynamic of fluids through porous media and achievement obtained by former people.Single well is looked as studying object.Extensive and deep studying is carried on stress-sensitive vertical Fractured-Wells testing.Fractured-Wells testing models in different oil-gas reservoirs have been established and worked out.New type template curves have been plotted.Following results have been presented:(1) Further studying on principle of flow of fluids through porous media in deformed media reservoirs and vertical fracture.(2) Base on the existing models,Finite-conductivity vertical fracture in deformed homogenous reservoir bilinear and trilinear well-t est models have been established and worked out.the effects of The quadratic-gradient term and wellbore storage have been considered,new type template curves have been plotted.(3) Base on the existing models,Finite-conductivity vertical fracture in deformed medium with double porosity bilinear and trilinear well-t est models have been established and worked out.the effects of the quadratic-gradient term and wellbore storage have been considered,new type template curves have been plotted.