Abstract:

The 3-D fluid flow with box-shape-bounded gas reservoir was set up in this paper, which was involved in wellbore storage and skin effect in natural fracture for horizontal well. On the basis of solutions of mathematical model, an effective calculating method of pressure response was studied, minimum convergence item of infinite series were obtained. on the basis of minimum convergence item of infinite series, the typical curves of well test analysis and fluid flow feature by numerical integral and Laplace’s reverse, algorithm presented in this paper is of practical value for fast calculating typical curves of well test analysis of horizontal well in natural fractured gas reservoirs.

Key words: natural fracture, gas reservoir, mathematical model, well test, typical curve