A Study on Solving the Linear Seepage Flow Model with r_(we) of Composite Reservoir

摘要

This paper studies the linear seepage flow model of composite reservoir under three different kinds of outer boundary conditions (infinite boundary, constant pressure boundary and closed boundary) which consider the well-bore storage and introducing the effective radius. On the basic of the theory of similar structure of solution of the BVP of differential equation, this paper obtains solutions of dimensionless reservoir pressure and dimensionless bottom-hole pressure of composite reservoir in Laplace space. Solutions of dimensionless reservoir pressure and dimensionless bottom-hole pressure have similar structure. Similar structures of solutions are convenient for analyzing the influence of reservoir parameters on reservoir pressure and bottom-hole pressure. The study supplements the other studies on composite reservoir.