西南石油大学学报（自然科学版）2017，Vol.39Issue(1)：155-160,6.DOI:10.11885/j.issn.1674-5086.2015.06.27.02
适用于柴油基钻井液的洗油型冲洗液研究
Flushing Fluid for Diesel-based Drilling Fluid Cleaning
摘要
Abstract
A diesel-based drilling fluid (DBDF) is wildly applied in complex deep wells.However,its strong adhesion to the casing and the well would severely affect the cementing quality.To solve this problem,a study on the preflush system FYJ was conducted:(1) established an optimized method of a surfactant;(2) optimnized the efficient surfactants;(3) evaluated indexes referring to the fluid flushing efficiency,the properties of wetting reverse,and compatibility with drilling mud,and we obtained a flushing fluid FYJ having a good comprehensive property.The results showed that (1) Anionic/non-ionic or mixed surfactants with HLB values of 12-15 should be used in preflush systems,the minimum surface tension of the surfactant solution (γmin) should be close to or less than that of soaking surfaces of DBDF (γc≈23-27 mN/m),and the optimum addition amount of the surfactant should be greater than the critical micelle concentration (CMC value).(2) The preflush system FYJ can remove 82 ％ of the DBDF attached to the well and casing walls,which have a strong temperature and salt resistance.(3) The preflush system FYJ provides good compatibility with DBDF and slurry,and it can effectively dilute the DBDF and slurry.关键词
柴油基钻井液/表面活性剂/洗油型冲洗液/清洗效率/润湿反转/相容性Key words
diesel-based drilling fluid/surfactant/flushing fluid/cleaning efficiency/wettability reversal/compatibility分类
能源科技引用本文复制引用
郭小阳,欧红娟,李明,辜涛,柳洪华..适用于柴油基钻井液的洗油型冲洗液研究[J].西南石油大学学报（自然科学版）,2017,39(1):155-160,6.基金项目
国家重点基础研究发展计划(973计划)(2013CB228003). （973计划）
