界面张力对海上油田采收率影响机理研究

Study on mechanism of influence of interfacial tension on oil recovery in offshore oilfield

随着海上油田的不断开采,开采难度越来越大,降低油水界面张力,增强驱油效率成为提高采收率的重要手段。为了研究界面张力对海上油田采收率影响因素,本论文选取不同类型的表面活性剂作为驱油体系,对海上油田A-1和B-1两个区块进行界面张力测定实验和一维模拟驱替测试,得出界面张力能力和驱替效果之间的直接关系,确定界面张力对提高采收率的影响机理,为以后海上油田进行降低界面张力提高采收率提供理论基础。

With the continuous exploitation of offshore oilfield,it is more and more difficult to exploit.Reducing oil-water interfacial tension and enhancing oil displacement efficiency be-come an important means to improve oil recovery.In order to study that influence factors of interfacial tension on oil recovery in offshore oilfield,this paper selects different types of surfactants as oil displacement system.Carry out interfacial tension measurement experiments and one-dimensional simulation displacement tests on two blocks of offshore oilfield A-1 and B-1.Obtains the direct relationship between interfacial tension capability and displace-ment effect,determines the mechanism of the influence of interfacial tension on oil recovery,and provides a theoretical basis for reducing interfacial tension and improving oil recovery in offshore oilfield in the future.