Fractured Well Test Theory And Methods

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.A hydraulic fracture is produced by manpower fracturing. In order to analyze and estimate fracturing effect and obtain parameters of reservoirs and Fractured-Wells after hydraulic fracturing, Fractured-Wells testing must be carried. 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 Fractured-Wells testing. Fractured-Wells testing models in different oil-gas reservoirs have been established and worked out. Fractured-Wells testing software has been developed. New type template curves have been plotted. Deep analysis has been carried on oil-gas field wells.Following results have been presented:(1) Further studying on Principle of Flow of Fluids through Porous Media in Reservoirs and Fractures.(2) Homogenous Reservoir Infinite-Conductivity Vertical Fracture Well Test Model has been established and worked out. Outside Boundaries are considered. Type Template Curves are plotted.(3) Homogenous Reservoir Bilinear Flows Finite-Conductivity Vertical Fracture Well Test Model has been established and worked out. Outside Boundaries are considered. Effects of wellbore storage and skin are included. Type Template Curves are plotted.(4) Homogenous Reservoir Trilinear Flows Finite-Conductivity Vertical Fracture Well Test Model has been established and worked out. Outside Boundaries are considered. Effects of wellbore storage, skin and changing wellbore storage are included. Type Template Curves are plotted.(5) Double-Porosity Media Reservoir Trilinear Flows Finite-Conductivity Vertical Fracture Well Test Model has been established and worked out. Outside Boundaries are considered. Effects of wellbore storage and skin are included. Type Template Curves are plotted.(6) Homogenous Low-Velocity Non-Darcy Low-Permeability Reservoir Finite-Conductivity Vertical Fracture Well Test Model has been established and worked out. Outside Boundaries are considered. Effects of wellbore storage and skin are included. Type Template Curves are plotted.(7) "Fractured-Wells Testing Analysis Software" has been developed.