泡沫凝胶组合防窜技术改善氮气驱气窜效果研究  

Study on the effect of foam gel anti-channeling system on nitrogen flooding channeling

作　　者：乔砚佳 郑继龙 QIAO Yan-jia;ZHENG Ji-long(CNOOC Changzhou EP Coating Co.,LTD,Tianjin 300452,China;CNOOC Ener Tech-Drilling&Production Co,Tianjin 300452,China;State Key Laboratory of Offshore Oilfield Exploitation,Tianjin 300452,China)

机构地区：[1]中海油常州环保涂料有限公司,天津300452 [2]中海油能源发展股份有限公司工程技术分公司,天津300452 [3]海洋石油高效开发国家重点实验室,天津300452

出　　处：《陕西理工大学学报（自然科学版）》2020年第2期71-75,共5页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：“十三五”国家科技重大专项基金资助项目(2011ZX05024-002-001)。

摘　　要：针对非均质性储层氮气驱气体窜流严重的问题,采用室内物模实验研究手段,对泡沫防窜体系、凝胶防窜体系及泡沫凝胶组合防窜体系的防窜效果进行研究。结果表明:单纯的氮气泡沫驱可基于氮气驱提高采收率14.18%,氮气泡沫驱后转凝胶驱可提高采收率2.72%,凝胶驱后进行泡沫驱可基于凝胶驱提高采收率15.56%。凝胶防窜体系注入非均质储层后,会将剩余油封闭在低渗透储层;泡沫防窜体系由于泡沫强度弱,防窜效果不佳;泡沫凝胶组合防窜体系具有较好的封堵效果,对气窜抑制作用明显,能够大幅提高气驱开发效果。In view of the serious problem of gas channeling in heterogeneity of the reservoir nitrogen flooding,based on the research of indoor physical model,a simulated experiment has been conducted to detect the anti-channeling effect of the bubble,gel and foam-gel composite.The results show that the pure nitrogen foam flooding based on nitrogen flooding can improve oil recovery by 14.18%,nitrogen foam flooding after turn gel flooding recovery efficiency can be improved by 2.72%,after the gel flooding foam flooding can be based on gel flooding to improve oil recovery by 15.56%.The gel channel-proof system will seal the remaining oil in the low permeability reservoir after it is injected into the heterogeneous reservoir.Because of the weak foam strength,the froth anti channeling system has poor effect.Therefore,the combined anti-channeling system of foam-gel has a strong blocking effect and a significant effect on gas channeling inhibition,which can greatly improve the development effect of gas flooding.

关 键 词：泡沫驱 泡沫凝胶组合防窜 氮气驱 防窜体系 采收幅度 

分 类 号：TE135[石油与天然气工程—油气勘探]