Analysis of Pressure and Rate Transient Data From Wells in Multilayered Reservoirs: Theory and Application

Abstract

Abstract A new solution technique is described for the analysis of multi-layered tests. This technique is based on an analytical conversion of a single-layer transient pressure response into a multi-layer response. Formation cross-flow is taken into account and a wide variety of inner and outer boundary conditions are possible. The method is succesfully applied to a field example for which single-layer analysis failed to give consistent results. Regression is used to simultaneously match observed pressures and layer rates. In the absence of measurable layer rate transients, as encountered in the field example, simple flow profile measurements to obtain relative layer production are all that is required to perform a multi-layer analysis.