石油与天然气化工2018，Vol.47Issue(3)：62-66,5.DOI:10.3969/j.issn.1007-3426.2018.03.013
微泡沫与普通泡沫注入性及调剖能力对比
Comparison of injectivity and profile control capacity of microfoam and common foam
摘要
Abstract
Aiming at the problems of poor injectivity and worse migration of common foam , microfoam with tiny diameter is prepared by co-flowing gas and foaming agent to sand pack pipe foaming generator .The differences of injectivity and profile control of microfoam and common foam were compared by testing multiple pressure of long sand pack and parallel sand packs . Plugging mechanism and effectiveness in improving profile control capacity of microfoam and common foam were evaluated by micromodel tests .The results show that bubble diameter of microfoam is less than the pore throat diameter of high permeability area ,the flow resistance of bubble is lower .Microfoam would block pore throat of high permeability area through the way of bubble accumulation , subsequent bubbles would flow into low permeability area with the way of directly through or elastic deformation ,and a small number of bubbles could block small pore throat through the way of bubble trapped .However , the microfoam accumulated in the high permeability area is easily dispersed , resulting in a weak blocking strength and limited profile control ability .Compared with microfoam , bubble diameter of common foam is more than the pore throat diameter in high permeability area , flow resistance is greater and plugging ability is stronger ,the bubbles mainly flew through the way of elastic deformation and liquid membrane differentiation into the pore throat .Profile control capacity of common foam is better at the same foam injected volume .Microfoam could produce more uniform differential pressure across the sand pack ,and its injectivity and deep plugging ability are better than the common foam ,but the capacity of blocking high permeability channel ,water flushing resistance , and profile control is weaker .关键词
微泡沫/注入性/调剖能力/非均质微观模型Key words
microfoam /injectivity /profile control capacity /heterogeneous micromodel引用本文复制引用
史胜龙,王业飞,温庆志..微泡沫与普通泡沫注入性及调剖能力对比[J].石油与天然气化工,2018,47(3):62-66,5.基金项目
长江学者和创新团队发展计划项目"复杂油藏开发和提高采收率的理论与技术"(项目编号IRT1294) ,中央高校基本科研业务费专项资金资助"微泡沫体系的构筑及性能评价"(项目编号15CX06030A) （项目编号IRT1294）
