Influenced by crude oil properties,water flooding with self-emulsification in heavy oil reservoirs is different from conventional water flooding,and the conventional theories for light oil water flooding are not applicable to heavy oil reservoirs.Taking a heavy oil reser-voir with self-emulsification water flooding and the reservoir fluid parameters in China as cases,the water flooding with heavy oil self-emul-sification was studied through laboratory experiments and numerical simulations to clarify key mechanisms and main influencing factors.The new numerical simulation method reveals that the stable displacement stage of the self-emulsification water flooding is a quasi-piston oil displacement pattern.The development process can be divided into four stages,namely pure oil,transition,plateau and rapid WOR in-crease.Permeability ratio and crude oil viscosity are the main factors affecting the water cut in self-emulsification water flooding,followed by permeability and water injection rate.
关键词
稠油/自乳化/水驱/含水率/平台阶段/关键机理/影响因素/数值模拟
Key words
heavy oil/self-emulsification/water flooding/water cut/plateau stage/key mechanism/influencing factor/numerical simulation
维普
万方数据