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| Technique for proper pressure difference determination in underbalance drilling and its application in Xinjiang oilfield |
| Zhang Shouliang1 Deng Jingen1 Xu Xianguang2 Li Weixuan2 Cha Yongjin3 |
| 1. Petroleum University (Beijing)) 2. Exploration and development institute of Xinjiang oilfield) |
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Abstract Borehole stability is the key for successful underbalance drilling. In this paper, critical differential pressure calculating model for maintaining borehole stability and preventing blowout while drilling in underbalance condition is presented, using poroelastic and rock mechanics theory, and then, the principle for determining proper underbalance drilling pressure difference is put forward. Finally, using in situ stresses and rock strength parameters of well block ShiNan 4, critical underbalance drilling differential pressure of this block is calculated, according the result, the feasibility of underbalance drilling in this block is analyzed. Field application shows that theoretical results match the engineering situations very well, thus verifies the model.
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Received: 25 April 2003
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[1] 《岩石力学基础》 J.C.耶格 N.G.W.库克 著 中国科学工程研究所 译 科学出版社
[2] Petroleum Related Rock Mechanics ERLING FJAER,RUNE M. HOLT
[3] 《高等岩石力学》 清华大学 周维垣 主编 水利电力出版社
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KANG Hongpu1, 2, 3*, GAO Fuqiang1, 2, 3, WANG Xiaoqing1, 2, 3, YUAN Guiyang1, 2, 3, YANG Lei1, 2, 3, LOU Jinfu1, 2, 3. Development and application of a large-scale experimental system for roadway rockburst induced by fault slip[J]. , 2026, 45(6): 1599-1614. |
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2003, Vol. 22 
