Print Email Facebook Twitter Discerning in situ performance of an eor agent in the midst of geological uncertainty Title Discerning in situ performance of an eor agent in the midst of geological uncertainty Author Fatemi, S.A. Jansen, J.D. Rossen, W.R. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2015-04-14 Abstract An enhanced-oil-recovery pilot test has multiple goals, among them to verify the properties of the EOR agent in situ. Given the complexity of EOR processes and the inherent uncertainty in the reservoir description, it is a challenge to discern the properties of the EOR agent in situ. We present a simple case study to illustrate this challenge: a polymer EOR process in a 2D layer-cake reservoir. The intended polymer design value is 21 cp in situ but we allow it might be ¼ that intended in the simulations. We test whether the signals of this difference at injection and production wells would be statistically significant in the midst of the geological uncertainty. We compare the deviation caused by loss of polymer viscosity to the scatter caused by the geological uncertainty at the 95% confidence level. Among the signals considered, the rate of rise in injection pressure with polymer injection and maximum injection pressure in the injector give the most reliable indications of whether a polymer viscosity was maintained in situ. Arrival time of the oil bank, minimum oil cut before oil bank arrival and polymer breakthrough time also give a statistically significant indication. To reference this document use: http://resolver.tudelft.nl/uuid:62ece9de-ee13-45a2-b40c-8db3de3c4ad8 Publisher EAGE Source IOR 2015: 18th European Symposium on Improved Oil Recovery, Dresden, Germany, 14-16 April 2015 Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) Files PDF 317167.pdf 1.06 MB Close viewer /islandora/object/uuid:62ece9de-ee13-45a2-b40c-8db3de3c4ad8/datastream/OBJ/view