ASP Flooding

 

Alkaline Surfactant Polymer (ASP) flooding is a form of chemical Enhanced Oil Recovery (EOR) that can allow operators to extend reservoir pool life and extract incremental reserves currently inaccessible by conventional techniques such as waterflooding. In the ASP process, a very low concentration of the surfactant is used to achieve ultra low interfacial tension between the trapped oil and the injection fluid / formation water. The ultra low interfacial tension also allows the alkali present in the injection fluid to penetrate deeply into the formation and contact the trapped oil globules. The alkali then reacts with the acidic components in the crude oil to form additional surfactant in-situ, thus, continuously providing ultra low interfacial tension and freeing the trapped oil. In the process, polymer is used to increase the viscosity of the injection fluid, to minimize channeling, and provide mobility control. The combination of the three chemicals is synergistic; together they are more effective than as individual components.

 

 ASP Block Diagram2.jpg