Performance Analysis of a Water-Drive Oil Reservoir: An Oilfield Case Study

Abstract

One of the primary responsibilities of a reservoir engineer is to evaluate the performance of hydrocarbon reservoirs to estimate the original hydrocarbons in place, reserves, ultimate oil/gas recovery factor. This responsibility becomes complicated in the case of water-drive reservoirs due to the high uncertainty associated with aquifer properties, including rock properties and aquifer geometry. This paper presents a new method to find the optimum aquifer model based on the root mean square error (RMSE) values by using MBAL software. The study investigated the transmissibility between the X, Y, and Z reservoirs in the field. Additionally, the original oil-in-place (OOIP) was estimated by using material balance equation and Monte Carlo concepts.