固井内置悬浮液研究与应用

Research on inner suspension and its application to GIF cementing

范廷秀 郑琦铭 贾付山 姜开文

FAN Ting-xiu ZHENG Qi-ming JIA Fu-shan JIANG Kai-wen

大庆石油管理局钻井生产技术服务公司, 黑龙江大庆 163358

Drilling Production Technology Service Company of Daqing Petroleum Administrative Bureau, Daqing 163358, Heilongjiang, China

为解决后期测井遇阻问题和平衡清水顶替钻井液压差过大问题,在不影响固井施工程序的情况下,通过替入一定量的固井内置悬浮液,预防了固相颗粒沉淀,不会出现假水泥塞现象。文中介绍了悬浮液的施工工艺,在分析、实验的基础上筛选出最合适的悬浮剂、调节剂,并通过室内实验得出:悬浮液的水化时间达10h左右;在10~70℃悬浮液的黏度变化不大;在pH为2~11时悬浮液性能稳定,pH低于2时有固体析出,pH高于11时溶液黏度降低;悬浮液对于Ca2+、Mg2+及氯化钠类盐类,均不产生沉淀。现场试验表明:GIF固井内置悬浮液具有良好的悬浮性能,能够满足固井施工的技术要求,解决了使用钻井液顶替水泥浆,造成15d后测井遇阻的问题,可大面积地推广应用。

In order to tackle the problems that the logging tool is stuck in late logging and the pressure difference caused by the displacement of drilling fluid by balanced clean water,bullheading of certain amount of inner suspension is carried out without affecting well cementing operation procedures,which helps prevent precipitation of solid particles and avoid false cement plugging.This paper introduces the construction technology of suspension and selects the most suitable suspension agents and regulators on the basis of analysis and experiments.Through laboratory experiments,the hydration time of suspension is as high as 10 hours.What’s more,the viscosity of suspension is low when the temperature is between 10 ℃ and 70 ℃,the performance of suspension is stable when the pH is ranging from 2 to 11,solid particles will be precipitated from the suspension when the pH is lower than 2,and the viscosity of solution decreases when the pH is higher than 11.No precipitates will be separated from suspension in Ca2+,Mg2+,and sodium chloride salts.Field test shows that the inner suspension of GIF cementing has excellent suspension performance and can fulfill the technical requirements of cementing construction.In addition,it solves the problem that the logging tool is stuck in late logging caused by the replacement of cement slurry by drilling fluid and can be widely used in practice.

10.3969/j.issn.1000-7393.2007.04.027