Recent Trends in Enhanced Oil Recovery Patents (2014), Part 2: Additives – Demulsifiers
Oct 6th, 2015 by William Reid | News | Recent News & Articles |
Chemical methods of EOR recovery generally include polymer flooding, chemical flooding, liquid carbon dioxide flooding, and hydrocarbon displacement. Additives used in this area employ a variety of mechanisms, e.g., a reduction in the oil-water interfacial tension, alteration of surface wettability, and the use of high viscosity agents for mobility control. The objective is generally to increase the mobility of the oil phase relative to the water used in flooding the well to maximize oil recovery. To improve operability and performance, EOR applications sometimes use a combination of surfactant and polymer, known as “SP” formulations and alkaline, surfactant and polymer systems, known as “ASP” formulations.