DefinePK

Abstract

Normally, isochronal tests are designed for flow periods of 4 hr since it is considered enough time to be under transient radial flow conditions. For elongated systems that time may fit on the linear flow regime period, then, the linear transient equation and the geometric skin factor must be included. In this paper the effect of the use of the geometric skin factor and the appropriate flow equation is compared. It was found huge differences if the IPR is inappropriately estimated. A set of equations for the estimation of IPR for homogeneous and naturally fractured reservoirs are presented for both pseudopressure and square pressure change.