Abstract
From the mathematical point of view, water drive fields present us many interesting problems. There are several solutions for the diffusivity equation for unsteady-state flow of a compressible liquid in a porous media. However, all these solutions are for the single fluid case. In the solutions to be presented here, the writer tried to solve the equation under several assumptions, taking into account the existence of the aquifer around the oil reservoir and applying the Laplace transformation.
