The Mechanism And Effect Analysis Of Air Foam Flooding In Buried Hill Reservoir

With the further development of static north buried hill reservoir,the water cut sharp rise in consecutive years,the trend of the production of a big drop in the action potential of small,difficult to water plugging and stable formation pressure and control water cut rising velocity contradiction is very outstanding,still display used in buried hill reservoir water flooding technology of oilfield development show some not adaptive,so buried hill reservoir in urgent need of the other displacement technology to stabilize oil reservoir production status.Air foam flooding comprehensive air displacement and the double advantage of foam flooding,is a creative new ways to improve recovery factor,it not only has the double function of profile control and oil displacement,but also overcomes the drawback of air displacement gas channeling.Through the thorough investigation of the domestic air foam flooding technology,the development level of the current air foam flooding and the problems faced are understood.On this basis,the indoor research and field test of air foam flooding technology were carried out respectively.Firstly,the reservoir characteristics and development status of buried hill reservoir are explored,and the bubble flooding system with good bubbling and stability is screened out.Using sand filling tube model of air foam flooding displacement experiment,the analysis of macro block air foam flooding experiment result,study the factors influencing the size of the air foam sealing ability and oil displacement effect of foam flooding.Then on the basis of indoor research,combined with the indoor research and field conditions of the buried hill reservoir of air foam flooding pilot test,the optimization design of air foam flooding plan and effect prediction research.The research of this topic is of great significance to the development of air foam flooding in buried hill reservoir.