Pouring into 0. 3 pore volume oil displacement agent improved 17% crude oil recovery. Oil displacement agent should be pour into as early as possible after polymer flooding.

• 室内物理模拟试验发现注入0.；3倍孔隙体积的高效驱油剂；能提高原油采收率17%25；聚合物驱后应尽可能早的注入高效驱油剂。