Maximizing the Potential of Decline Curve Analysis

Abstract

fax 01-972-952-9435. AbstractThe data most collected within the oil industry is the rate-time data. This data is analyzed with decline curve to primarily determine well/reservoir remaining reserves. However, rate-time data, which is a form of extended well testing, can also be used to estimate other reservoir parameters such as permeability and/or relative permeability curve.In this paper, we utilized Masoner's decline derivation to show that estimates of the relative permeability curve can be obtained from a well under voidage rate control in a solution gas drive system. For a well under pressure control in a solution gas drive reservoir, however, we show that the decline is exponential and obtain an expression for the permeability. The results were applied to data from solution gas drive simulation models and are presented. Application to field data is also presented.