After　the　water　flooding　process　or　secondary　oil　extraction,　the　tertiary　oil　extraction　has　been　widely　used　in　Chinese　oilfield　in　recent　years.　Although　this　technology　can　enhance　the　oil　recovery　by　up　to　12%,　it　also　produces　more　and　more　polymer-flooding　wastewater　as　byproduct　per　year.　Without　proper　treatment,　the　oil　pollutant　pollutes　and　poisons　the　water　and　atmospheric　environment.　Removing　polymer　and　oil　from　the　oilfield　produced　water　is　an　important　aspect　of　pollution　control　in　oil　and　gas　industry　of　China.　One　of　the　major　technical　requirements　of　the　crude　oil　exploitation　industry　is　to　minimize　the　concentration　of　hydrolyzed　polyacrylamide　(HPAM),　crude　oil　and　suspended　solid　(SS)　in　the　oilfield　polymer-flooding　wastewater　and　realize　the　reuse　of　this　wastewater.　In　this　study,　the　membrane　technology　was　used　to　achieve　this　goal　in　laboratory-scale　dead-end　test　unit　with　flat　polyvinylidene　fluoride　(PVDF)　membrane　(MW　100　kDa).　We　systematically　inspected　the　membrane　fouling　mechanism,　the　variety　of　total　membrane　resistance,　total　fouling　resistance,　the　dominant　resistance,　membrane　fouling　driving　force　and　the　filtration　proceeds　in　the　filtration　process.　The　orthogonal　method　and　multivariate　linear　regression　method　were　applied　to　analyze　the　influencing　degree　of　the　main　pollutant　concentration　on　the　critical　flux.　According　to　comparison　of　the　average　rates　of　change　of　the　critical　flux　for　the　HPAM　concentration,　oil　concentration　and　SS　concentration　in　single　solute　solution,　double　solute　solution　and　oilfield　polymer-flooding　wastewater,　HPAM　can　decrease　the　average　rate　of　change　of　the　critical　flux　for　other　two　solutes　and　has　the　crucial　effect　on　the　critical　flux.　According　to　this　research,　the　ultrafiltration　membrane　technique　can　be　efficiently　used　to　treat　synthetic　oilfield　polymer-flooding　wastewater.　A　standard　procedure　is　developed　to　be　a　methodology　reference　for　the　wastewater　treatment.　Copyright　2014,　International　Petroleum　Technology　Conference.