Super-amphiphobic, strong self-cleaning and high-efficiency water-based drilling fluids

被引：0
|
作者：
Jiang G. [1 ,2 ]
Ni X. [1 ,2 ]
Li W. [1 ,2 ]
Quan X. [1 ,2 ]
Luo X. [1 ,3 ]
机构：
[1] State Key Laboratory of Petroleum Resources and Prospecting, Beijing
[2] College of Petroleum Engineering, China University of Petroleum, Beijing
[3] Western Drilling Engineering Company of PetroChina, Karamay
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2020年 / 47卷 / 02期
关键词：
Polymer; Reservoir protection; Super-amphiphobic agent; Water-based drilling fluid; Wellbore stability;
D O I：
10.11698/PED.2020.02.18
中图分类号：
学科分类号：
摘要：
Based on the amphiphobic theory on underground rock surface, a super-amphiphobic agent is developed and evaluated which can form nano-micro papilla structure on rock, filter cake and metal surface, reduce surface free energy, prevent collapse, protect reservoir, lubricate and increase drilling speed. With this super-amphiphobic agent as the core agent, a super-amphiphobic, strong self-cleaning and high-performance water-based drilling fluid system has been developed by combining with other agents based on drilled formation, and compared with high-performance water-based drilling fluid and typical oil based drilling fluid commonly used in oilfields. The results show that the super-amphiphobic, strong self-cleaning and high-performance water-based drilling fluid has better rheology, and high temperature and high pressure filtration similar with that of oil-based drilling fluid, inhibiting and lubricating properties close to oil based drilling fluid. Besides, the super-amphiphobic system is non-toxic, safe and environmentally friendly. Field tests show this newly developed drilling fluid system can prevent wellbore collapse, reservoir damage and pipe-sticking, increase drilling speed and lower drilling cost, meeting the requirement of safe, high efficient, economic and environmentally friendly drilling. Compared with other drilling fluids, this new drilling fluid system can reduce downhole complexities by 82.9%, enhance the drilling speed by about 18.5%, lower drilling fluid cost by 39.3%, and increase the daily oil output by more than 1.5 times in the same block. © 2020, The Editorial Board of Petroleum Exploration and Development. All right reserved.
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收藏
页码：390 / 398
页数：8
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