醇基酸化液在海拉尔盆地敏感性储层中的应用

The Application of Acid Fluid with Alcoholic Group in Haila'er Sensitive Reservoirs

海拉尔油田贝301试验区块自全面投入注水开发以来,部分井存在注水压力上升快、吸水能力下降的情况。为解决完不成配注的问题,根据海拉尔油田贝301试验区强水敏特性,室内复配筛选了低破碎高效防膨醇基酸液体系。该体系具有较好的溶蚀、低破碎、破乳、助排、抑制二次沉淀等性能,现场应用2口井,取得了较好的效果,可在海拉尔油田贝301试验区块强水敏储层进行规模化推广应用。

Since overall waterflooding staged in the No.301 Bei pilot area in Haila'er oilfield in 2004,rapid injection pressure rise and injectivity drop have occurred in some wells.Based on the strong water sensitivity in Haila'er oilfield,a highly effective,low-breaking ratio,) counter-swelling acid fluid system with alcoholic group was screened out,so as to coordinate fracturing pressure and injection allocation.The system is characterized by high-level corrosion,low breaking ratio,demulsification,aiding discharge and restraining from secondary precipitation.The system has been applied in two wells,and has achieved favorable results.Hence,it is available to industrialized in Haila'er sensitive reservoirs