强抑制超深水钻井液的制备与性能评价
Preparation and performance evaluation of ultra-deep water drilling fluid with strong inhibition
文杰 1吴娇2
作者信息
- 1. 中海油服上海分公司,上海 200335
- 2. 荆州嘉华科技有限公司,湖北荆州 434000
- 折叠
摘要
针对超深水钻井中钻井液黏土水化抑制性和封堵性能不足、低温流变性差等问题,室内通过开环聚合、硅氢加成和季铵化3步反应,合成了一种以Si-O-Si为主链的聚硅氧烷抑制剂MNT.结果表明,MNT不影响强抑制超深水水基钻井液体系的流变性能;在20％岩屑污染下,黏度和切力增长幅度小;对比原有的强抑制超深水水基钻井液体系,加入MNT后体系二次滚动回收率从86.9％提升到93.6％,90℃下的防膨率从81.9％增强到91.5％,具有更好的抑制泥岩水化膨胀和水化分散的能力;同样压力下,NaCl比KCl更能抑制水合物生成.
Abstract
In order to solve the problems such as insufficient hydration inhibition and plugging properties and poor rheological properties of mud clay in ultra-deep water drilling,a silicon-O-silicon main chain polysiloxane inhibitor MNT was synthesized by three steps of ring-opening polymerization,silane hydroaddition and quaternization.The results show that MNT does not affect the rheological properties of the strongly inhibited ultra-deepwater water-based drilling fluid system.Under 20％cuttings pollution,the viscosity and shear force increase slightly.Compared with the original ultra-deepwater water-based drilling fluid system with strong inhibition,the secondary rolling recovery rate of the system increased from 86.9％to 93.6％after adding MNT,and the anti-swelling rate increased from 81.9％to 91.5％at 90℃,which has a better ability to inhibit mudstone hydration expansion and hydration dispersion.NaCl is more effective than KCl in inhibiting hydrate formation under the same pressure.
关键词
超深水/聚硅氧烷/强抑制/水合物Key words
ultra-deep water/polysiloxane/strong inhibition/hydrate引用本文复制引用
出版年
2024
NETL
NSTL
万方数据