Study on Characteristics of Polymer Surfactant and Application of Polymer Surfactant Flooding Technology in Oilfield

摘要

This paper briefly introduce that the development of polymer surfactant flooding in Daqing Oilfield. The polymer flooding technology has been studied for 30 and increased cumulatively more than 100 million tons crude oil in Daqing Oilfield. But the common polymers used in polymer flooding has poor resistance to shear, salt and high temperature and does not suitable to high temperatures, high salinity reservoir, so there are new type of polymer surfactant comes as polymeric surface-active agent be researched before decade and carried out a series of pilot test in Daqing Oilfield. The polymer surfactant be used in S I reservoir and XII reservoir that belong to the second or third class reservoir at west and Pu I reservoir that belong to the first class reservoir of northeast in Daqing Oilfield. Where application of polymer surfactant flooding produced significant oil recovery than water flooding or common polymer flooding. The polymer surfactant flooding technology is the innovated and replaced methods that can decrease cost and further enhance the recovery. It is studied on that the characteristics of polymer surfactant is strong emulsifying ability, salt resistance and suitable for EOR by SEM and other series of experiment. It contrast with normal polymer shows the oil recovery is higher, the injection process is simpler and the costs is lower and it has good application prospects.