Enhanced Oil Recovery in a Selected UAE’s Tight Carbonate Reservoir by Flooding of Sodium Lauryl Sulfate and High Saline Water
DOI:
https://doi.org/10.59573/emsj.7(3).2023.26Keywords:
Enhanced oil recovery, Chemical EOR, Surfactant flooding, Tight carbonate reservoirs, Sodium lauryl sulfateAbstract
Enhanced oil recovery has become an essential process in oil production due to the large amount of oil that could not be produced by the primary and secondary oil recovery techniques and the increasing demand for oil. The main purpose of the enhanced oil recovery process is to transfer oil in the production wells by the flooding of different fluids to increase the natural energy present in the reservoir and alter the properties of reservoir’s properties such as interfacial tension, rock wettability, oil and water viscosity, pH.
Enhanced oil recovery may be divided into the following categories: Thermal methods, Miscible flooding, Microbial enhanced oil recovery (MEOR), Foam flooding, Gas injection, Plasma-pulse, and Chemical enhanced oil recovery.
A process in which one or more pre-selected chemicals are mixed with water or brine and then flooded into the reservoir to increase the oil recovery factor further than water flooding levels is called chemical enhanced oil recovery (Chemical EOR).
In this research the usage of sodium lauryl sulfate (SLS) had been studied as a surfactant to enhance the oil recovery in one of the United Arab Emirates tight carbonate reservoirs. SLS was mixed with various brines to optimize the brine concentration and SLS concentration in brine. Core rock samples were taken from a tight carbonate reservoir in United Arab Emirates, whereas Bu Hassa crude oil used to perform the flooding, IFT, and AMOTT experiments.
It was found that (SLS) has a significant effect on the interfacial tension between crude oil and all types of brine used in this research, especially on the high saline formation brines, where the residual oil saturation was at the minimum. Hence using the proposed technique will save time, money, and the environment.
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