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.
收稿日期: 2003-04-25
引用本文:
张守良;邓金根;徐显广;李维轩;查永进. 欠平衡钻井合理压差的确定技术及在新疆油田的应用[J]. 岩石力学与工程学报, 2003, 22(S1): 2457-2460.
Zhang Shouliang1 Deng Jingen1 Xu Xianguang2 Li Weixuan2 Cha Yongjin3. Technique for proper pressure difference determination in underbalance drilling and its application in Xinjiang oilfield. , 2003, 22(S1): 2457-2460.
2003, Vol. 22 
