摘要
从影响井壁稳定的力学因素出发，通过井壁围岩应力分析提取影响斜井井壁稳定的主应力，结合岩石破坏的强度准则建立地层坍塌压力和破裂压力的测井预测模型。针对研究工区地质情况对模型进行适当修正，建立了该区安全钻井液密度窗口。通过精细解释测井资料预测的井壁稳定情况表明，测井资料能够较好地预测井壁的稳定性，为防止井漏、井塌等工程事故提供了重要依据。
Starting from the mechanic factors that influence wellbore stability, the main stress that influences well stability of inclined well is determined through borehole wall surrounding rock stress analysis, and combining with the intensity principle of rock damage, logging prediction model of formation caving pressure and fracture pressure is established. Certain modification is made to the model considering the geological conditions of the studied area, and density window of safe drilling fluid is established. The wellbore stability predicted by the fine interpretation of logging data shows that logging data can predict wellbore stability and provide criteria for the prevention of engineering accident, such as circulation loss, hole collapse, etc.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第6期171-174,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重点基础研究发展规划（973）项目（2011CB403002）资助.
关键词
斜井
井壁稳定
测井
破裂压力
坍塌压力
inclined well
wellbore stability
well logging
fracture pressure
caving pressure
