关键词: 变形介质, 数学模型, 非线性, 解析解, 数值解, 开发特征

Abstract: Since the deep-seated reservoir bears high pressure and high temperature,a partial or complete irreversible deformation is generated in the development process of deep-seated reservoir.The deformation apparently influences the reservoir's dynamic characteristic.Using analytical and numerical methods,flowing pressure distribution on variable boundary condition is derived from dealing with one dimension nonlinear-elastic flow mathematical model in deformed media,and compared with the results from general linear-elastic unsteady flow in porous media,and emphatically analysis flowing pressure distribution caused by the variation of permeability.The result shows that,as deformed media's elasticity increase,the formation pressure increase slowly at constant water injection rate and water injection rate increase under constant flowing bottom hole pressure.The formation pressure decrease rapidly at constant oil production and oil production decrease under constant flowing bottom hole pressure.The initial formation pressure should be retained in deformed media reservoir development in order to obtain a higher recovery.

Key words: deformed media, mathematical model, nonlinear analytical solution, numerical solution, development characteristic