Chemical methods to improve the foam stability for foam flooding

摘要

In this paper,evaluation experiments conceming surfactant foams,polymer enhanced foams and clay nanoparticle enhanced foams were carried out.The results under crude oil free conditions indicated that,polymer enhanced foams could improve foam stability by 10 to 50 times compared with surfactant foams.For nanoparticle enhanced foams,the foams stability could be further enhanced by more than one order of magnitude compared with polymer enhanced foams.With Daqing oil introduced,the stability of foams for different foam formula differed remarkably.For the experiment investigated,foam stability could be improved by certain degree when Daqing crude oil was introduced.