摘要
建立了直井在均匀水平地应力作用下的弹塑性模型 ,并推导了坍塌压力、破裂压力的计算公式。在此基础上编制了井壁稳定弹塑性分析软件 ,并在江苏油田盐城地区盐城 3井中进行了初步应用 ,结果表明 ,地层坍塌压力的预测结果与现场实际非常一致。
Elastic & plastic model for borehole stability model under homogeneous horizontal stress in vertical wells is established, and the formulas to calculate the sloughing and fracture pressures are derived in this paper. The software to analyze elastic & plastic bore hole stability is also developed. The apllication in Yancheng area, Jiangsu Oilfield shows that the predicted sloughing pressure is well fitted with the field condition.
出处
《石油钻探技术》
CAS
北大核心
2000年第4期9-11,共3页
Petroleum Drilling Techniques
关键词
井眼轨迹
油井
井壁稳定
弹塑性模型
坍塌压力
hole trajectory, hole stabilization, elastoplasticity, theoretical model, stress analysis, theoretical analysis, Jiangsu Oilfield, Yancheng 3 Well
