摘要
基于弹性力学理论及岩石摩尔-库仑强度破坏准则,提出了欠平衡钻井条件下井径扩大率的预测方法。利用本文方法,可进行欠平衡钻井可行性分析以及欠平衡钻井压差确定。结合渤海某井地应力及地层强度参数得到的井径扩大率预测结果,可为该井区实施欠平衡钻井提供参考。
Based on the theory of elasticity and molar-Coulomb strength failure criterion,we proposed the prediction method for hole enlargement ratio in the condition of underbalanced drilling.Using this method,we can carry out feasibility analysis and determine the differential pressure in underbalanced drilling.The hole enlargement ratio predicted by combining with the crustal stress and formation strength parameters in a well in Bohai sea,may provide reference to implement underbalanced drilling in the area.
出处
《中国海上油气》
CAS
2007年第5期335-337,共3页
China Offshore Oil and Gas
关键词
欠平衡钻井
井径扩大率
预测
underbalanced drilling
hole enlargement ratio
prediction
