Effect and Analysis on Cr3+ Gel Improving Profile Control in Alkalescent lkaline/Surfactant/Polymer (ASP) Flooding
- 作者：Lu XiangguoZhang KeZhao LanlanGao ErshuangLiu Xiaoguang
- 会议时间：2007-10-20
- 关键词：化学驱油 ; 三价铬 ; 聚合物凝胶 ; 表面活性剂 ; 控制作用
- 作者单位：Lu Xiangguo,Zhang Ke,Zhao Lanlan(Key Laboratory of Enhanced Oil Recovery Daqing Petroleum Institute,Ministry of Education,Daqing Petroleum Institute,Daqing 163318,P.R.China)Gao Ershuang,Liu Xiaoguang(Oil Recovery Plant No.3,Daqing Oilfield Corp. Ltd 163414,P.R.China)
- 母体文献：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议论文集
- 会议名称：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议
- 会议地点：成都
- 主办单位：中国石油学会
- 语种：chi
摘要
The produced fluid emulsification and producing system scale have always been one of the most difficult problems in NaOH/surfactant/polymer flooding. In order to decrease those influences on production, the pilot test of Na2CO3/surfactant/polymer flooding is developed in Daqing Oilfield. The results show fluid emulsification and producing system scale have been controlled, but the injecting system scale aggravating reservoir heterogeneity is becoming a new technical problem. By analyzing scaling mechanism and the property of profile control agent, the author presents technique clue of Cr3+ polymer gel of improving fluid entry profile of injection well in Na2CO3/surfactant/polymer flooding. The optional formula, property evaluation and compatibility condition between Na2CO3/surfactant/polymer flooding and polymer gel are studied, and pilot test has been used to judge its availability in 2-1-P56 well of Daqing oilfield. The results shows polymer gel has double functions on scavenge and blanking off high permeability zone. The scale of the instrument of injection, pipes and well wall is thoroughly cleared up. The fluid entry in high permeability layer is decreased from 100% to 64.9%, and fluid entry in low permeability layer is increased from 0% to 35.1%. The profile control of injection well is effectively improved.