Transient Pressure Analysis for Partially Penetrating Wells in Naturally Fractured Reservoirs

Abstract

Abstract This paper presents an analytical solution that describes transient pressure behavior of partially-penetrating wells in naturally-fractured reservoirs. The solution is obtained by combining the pseudo-steady state model for naturally fractured reservoirs with the partially-penetrating well model in homogeneous reservoirs. Verification of the analytical solution is made by comparison of pressures derived analytically with those obtained from numerical simulation. The new type curves generated from the analytical solution indicate that partial penetration and double porosity effects cause a characteristic shape of the curves at early and transition time. The type curves may be used to analyze transient well test analysis for partially-penetrating wells in naturally-fractured reservoirs at early and transition time.