西南石油大学学报（自然科学版）2016，Vol.38Issue(3)：107-113,7.DOI:10.11885/j.issn.1674-5086.2014.04.13.02
特低渗非均质油藏水窜后提高波及效率研究
Researches on Improving Sweep Efficiency After Water Breakthrough in Ultra-low Permeability Heterogeneous Reservoir
摘要
Abstract
Focusing on the water channeling and the bad results of profile control in ultra-low permeability reservoir,the laboratory simulation experiments were conducted to study the anti-channeling and expanding sweep volume methods. The experiments of profile control and oil displacement were run in the reservoir models with interlayer heterogeneity,which shows that,the water injection pressure after profile control is higher than that in mid-high permeability reservoir,and it is difficult to improve the sweep efficiency in ultra-low permeability reservoir. Gas flows along water channeling path when injected directly after water flooding. Injecting gas after profile control can not only reduce the subsequent injection pressure but also improve the recovery by about 7.8%. The recovery can be improved by about 9.6% in the intermittent gas injection process after gas flooding. Therefore,injecting gas after profile control can be used after water channeling in ultra-low permeability reservoir to effectively expand sweep volume and improve the recovery.关键词
特低渗油藏/水窜/调剖/天然气驱/间歇注气/波及效率Key words
ultra-low permeability reservoir/water channeling/profile control/natural gas flooding/intermittent gas injec-tion/sweep efficiency分类
能源科技引用本文复制引用
王伟,杨辉,黄春霞,江绍静,岳湘安..特低渗非均质油藏水窜后提高波及效率研究[J].西南石油大学学报（自然科学版）,2016,38(3):107-113,7.基金项目
国家科技支撑计划（2012BAC26B00）；国家科技重大专项（2011ZX05009004004）。 （）
