Application of the Pressure-Derivative Function in the Pressure-Transient Testing of Fractured Wells

Abstract

Summary A new technique is presented for the analysis of wells with a finite-conductivity fracture. The technique simultaneously uses the pressure and pressure derivative for cases with no fracture skin and no wellbore storage and for cases with fracture skin and wellbore storage during the bilinear-flow period. New type curves are presented and applied to three field cases. The paper concludes that use of the pressure derivative with pressure-behavior type curves reduces the uniqueness problem in type-curve matching and gives greater confidence in the results.