摘要
定向井三向主应力受井眼轨迹、水平地应力方向等因素影响,求解困难,而目前多数井周主应力模型仅针对井壁位置,远离井壁多不适用。此文通过坐标转化方法,建立了定向井三向主应力的求解模型,并且对影响主应力大小的因素进行了研究,研究成果对于定向井井壁稳定、水力压裂等研究有一定的借鉴意义。
The principal stress is difficult to be solved in the directional well due to the influence of well trajectory/in-situ stress direc- tion and other factors. The present principal stress models of wellbore are only useful at the well wall, not applicable for the location far away from wall. Through coordinate transformation method, the principal stress model is established and the factors affecting the principal stress are studied. The study results are significant for study of wellbore stability/hydraulic fracturing and other researches.
出处
《海洋石油》
CAS
2014年第2期81-87,共7页
Offshore Oil
关键词
定向井
主应力
井斜角
方位角
directional well
principal stress
inclination angle
azimuth angle
