Technique of raising oil recovery by Polymer flooding-a case study of The 5~2+3 formation in Gudong oil field

摘要

The polymer flooding of the 5~2+3 formation in Gudong oil field is the first large scale commercial extending test area. Because of the problems such as; intensive injection and recovery in the process of water drive, varied characteristics of reservoir properties, large serious channel, the high and uneven formation pressure, uneven injection-production of boundary well, it resulted in low efficiency in reducing water and enhancing oil in the early time of polymer injection.