%I Society of Petroleum Engineers (SPE)
%V 2019-M
%A A. Shabib-Asl
%A M. Abdalla Ayoub
%A K. Abdalla Elraies
%T Combined low salinity water injection and foam flooding in sandstone reservoir rock: A new hybrid EOR
%R 10.2118/194975-ms
%D 2019
%J SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings
%L scholars12205
%O cited By 11; Conference of SPE Middle East Oil and Gas Show and Conference 2019, MEOS 2019 ; Conference Date: 18 March 2019 Through 21 March 2019; Conference Code:146430
%X To date, several methods have been designed and implemented either individually or as combination to increase oil recovery. The combined methods also called hybrid Enhanced Oil Recovery (EOR) pose great challenges in the oil and gas industry. This is also confirmed from the Industry Technology Facilitator (ITF)'s Gulf Cooperation Council (GCC) Technology roadmap that pinpointed hybrid EOR as the top challenge. This work investigates the potential of a new hybrid EOR method termed Low Salinity Water Assisted Foam flooding (LSWAF). Typically, it consists of injecting Low Salinity Water (LSW) followed by an alternated injection of a Surfactant Aqueous Solution (SAS) and CO2 gas. The selection of LSW was based on its ability to produce significant changes of rock wettability. While the SAS was made, so that it results in a considerable reduction of IFT and produce foam that will remain considerably stable in the presence of oil under reservoir conditions. The selection of the best LSW and SAS followed a screening phase whereby formulations of different ion compositions and salinities were prepared and their performances were compared against each other. Tests were carried out by using two types of light crude oil with different Total Acid Number and Base Number, namely Crude oil A and B. In terms of changes in wettability, for both crude oils A and B, the experimental results revealed that much changes were experienced by the LSW of KCl composition followed by that of NaCl, then CaCl2, MgCl2, Mix composition, and finally the formation water (FW) that presented negligible changes. The changes with crude oil B were greater than crude oil A. However, for crude oil A and B, the core flooding experiments showed that the highest residual oil recovery was achieved by the LSWAF of KCl composition (87.45 of OOIP) compared to the MgCl2 and FW. © 2019, Society of Petroleum Engineers.
%K Crude oil; Floods; Gas industry; Magnesium compounds; Oil well flooding; Petroleum reservoir engineering; Potassium compounds; Reservoirs (water); Sodium chloride; Wetting, Enhanced oil recovery; Gulf Cooperation Council; Industry technology facilitators; Low-salinity water; Oil and Gas Industry; Reservoir conditions; Sandstone reservoirs; Technology roadmaps, Enhanced recovery