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纳米材料提高水基钻井液页岩稳定性研究进展
孙金声1,2,李贺1,吕开河1,黄贤斌1,杨峥2
(1.中国石油大学(华东)石油工程学院,山东青岛 266580;2.中国石油集团工程技术研究院有限公司,北京 102200)
摘要:
维持井壁稳定一直是油气钻探过程中的技术难题。由于页岩微纳米孔缝与层理发育、水敏性高,井壁失稳问题在页岩层尤为突出。提高钻井液的性能是减少井壁失稳的重要途径。纳米材料因其独特的尺度和性质,可作为水基钻井液添加剂以提高页岩的稳定性。通过对国内外技术的跟踪与分析,阐述纳米材料提高页岩稳定性的评价方法、纳米材料类型及其作用机制。开展纳米材料在非均质地层的基础理论研究,开发在高温高压及高盐环境下稳定有效的新型纳米材料,建立纳米材料提高页岩稳定性的微观评价方法,是纳米材料的重要发展方向。
关键词:  纳米材料  页岩  井壁稳定  水基钻井液
DOI:10.3969/j.issn.1673-5005.2024.02.008
分类号:
文献标识码:A
基金项目:
SUN Jinsheng1,2, LI He1, LÜ Kaihe1, HUANG Xianbin1, YANG Zheng2
(1.School of Petroleum Engineering in China University of Petroleum (East China), Qingdao 266580, China;2.Research Institute of Engineering and Technology Limited, CNPC, Beijing 102200, China)
Abstract:
Maintaining wellbore stability has always been a technical challenge in oil and gas well drilling, which is particularly prominent in shale formations due to their micro and nano pores and laminae and high-water sensitivity. Improving the performance of drilling fluids is an important way to reduce wellbore instability. Nano-materials can be used as additives in water-based drilling fluids to enhance the stability of shale due to their unique particle size and properties. In this paper, the technical development of using nano-materials to enhance wellbore stability was reviewed, including the evaluation methods for shale stabilization, the types of nano-materials that can be used and their action mechanisms. It is important to conduct basic and theoretical research for nano-materials to be used in heterogeneous shale formation, develop new type of nano-materials that is stable and effective under high temperature, high pressure and high salt conditions, and establish microscopic methods for shale stabilization evaluation.
Key words:  nano-materials  shale  wellbore stability  water-based drilling fluids
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