Modelling of continuous surfactant flooding application for marginal oilfields: a case study of Bentiu reservoir

Abstract Enhanced oil recovery (EOR) is a proven method to increase production from the brown fields. One of efficient EOR methods injecting surfactants release trapped oil. However, few unconsolidated behaviours were observed in both field and laboratory practice. In this study, new framework was adapted evaluate continuous surfactant flooding (CSF) Bentiu reservoir. The study aims quantify expected range production, factor residual saturation ( S or ). motivation came demand Sudan insufficient cores. adopted includes numerical simulation modelling proxy modelling. Thirty-six cores obtained revised grouped into five main groups. interfacial tension (IFT) data experimentally. CSF sensitivity developed by combining different experimental design sets generate model. results showed around 30% additional compared waterflooding approximately between (20–30) cm 3 . generated model extrapolated with concerning lower ranges input an average P50 74% 17 , respectively. Overall, performance remained beneficial vast input. Moreover, gave insight on complexity interrelationship factors observants qualitative prospective factors. Yet, confirmed applicability core scale for application.