Waterflooding surveillance: Real time injector performance analysis using Hall plot method & derivative

Abstract

In waterflooding operation, it's important to do performance surveillance of injection well so the oil recovery can be optimum as well as planned. Loss in injectivity can cause several problems and will give a bad impact on both surface and subsurface facilities. So this paper will discuss injector performance evaluation in order to minimize those problems. The methods that is presented in this paper is Hall Plot (1963) and Derivative Hall Plot (2009). Hall proposed a qualitative method to analyze injector well performance based on plot between cumulative drawdown pressure against cumulative water injected. In 2009, Izgec & Kabir proposed a new method to monitor injector well performance that can be more discriminate in any subtle slope changes.This paper presents the advantages using Hall Plot and its derivative compared than other methods. Also analyzingthe cause of problems that happened and also give recommendation to overcome the problems.