Research and application of oil displacement and profile control technologies with AMPS weak crosslinked polymer in PC 2-403 well group

Effects of EOR through water injection are not ideal in late development stage of waterflooding oilfield. In order to better recover the by - passed oil in reservoirs, EOR technologies that can improve both sweep efficiency and flushing efficiency are needed. In view of the current status of exploitation and the major problems existed in PC 2-403 well group, AMPS weak corsslinked polymer system is formulated and applied, and the field application effects are good.