石油科技论坛

石油科技论坛 ›› 2010, Vol. 29 ›› Issue (4): 60-62.DOI: 10.3969/j.issn.1002-302x.2010.04.015

• 环球石油 • 上一篇    下一篇

阳离子聚合物钻井液在乍得H区块的开发应用

姜治1, 张亮1, 董学明2, 郭彬1, 杨洪1   

  1. 1. 中国石油集团钻井工程技术研究院;
    2. 中国石油海外勘探开发公司
  • 收稿日期:2010-08-05 出版日期:2010-08-25 发布日期:2015-12-11

Cationic Polymer Drilling Fluid Used in Block H in Chad

Jiang Zhi1, Zhang Liang1, Dong Xue-ming2, Guo Bin1, Yang Hong1   

  1. 1. CNPC Drilling Research Institut;
    2. CNODC
  • Received:2010-08-05 Online:2010-08-25 Published:2015-12-11

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摘要： 乍得项目在最初的钻井施工过程中曾经发生过井壁坍塌、井眼缩径、井漏等复杂情况,甚至造成卡钻事故,给钻井施工和有效勘探开发带来很大麻烦。通过分析岩样及室内大量实验,开发出了适合乍得H区块的阳离子钻井液配方。经过现场试用,效果很好,再没有发生井壁坍塌情况;钻井液密度在其配方优化的基础上也显出合理性,未再发生井漏。采用阳离子聚合物钻井液不仅保证了钻进施工的顺利进行,降低了钻井风险和钻井成本,而且由于避免了钻井液漏失,进而保护了油层。通过多口井现场试验,逐渐形成了适合乍得H区块的钻井液体系。该体系应用范围较广,性能上可以和油基钻井液媲美。

关键词: 乍得, 阳离子, 聚合物, 钻井液, 井壁稳定, 储层保护

Abstract: The original drilling fluid used in drilling operation for exploration and development in Block H in Chad was not adaptive to the geological traits. While drilling, cave-in and mud loss happened. That hurdled exploration and development. We want to gain a good drilling fluid for this aim through researching, experimenting and practicing. A good drilling fluid for Block H was gotten by analyzing cuttings samples and conducting a lot of experiments. Cave-in has never happened again since this kind of drilling fluid was used in drilling operation. And mud loss has not occurred since the excellent drilling fluid employed with its reasonable MW. It not only guarantees smooth drilling operation, but also avoids loss in pay zone and protects the reservoir. The adaptive drilling fluid system for Block H is achieved after practicing in a few wells.

Key words: Chad, cation, polymer, drilling fluid, sidewall stabilization, reservoir protection