In this paper, the well-testing analysis is made, based on the finite element method, for a naturally fractured reservoir with two intersection boundaries. Covergence of the numerical solution is proved and some typical theoretical curves of the pressure are presented in the cases of different location of the well position, different types of boundary conditions, and different intersection angles of the boundaries.

A computational formula of the theoretical curve for the curve fitting of well testing material of infinite naturally fractured reservoir is proposed. The double error control method and the logarithm searching method are used to seek the theoretical curve. A lot of experiments show that this method is with high precision and rapid calculating speed.