摘要
对现有的井壁稳定弹性模型的局限性进行了分析,在空间坐标变换基础上,建立了新的定向井井壁稳定分析三维有限元模型,可适用于任意井眼轨迹。计算结果与解析解对比,其误差低于6%,说明所建模型是合理的,为进一步分析弹塑性地层的井眼稳定问题提供了有效工具。
A new three-dimensional FEM model for directional well borehole stability analysis has been created based on the theory of spacial coordinate transformation system, which can be used for any wellbore trajectory. The errors between the modeling results and the analysis values are less than 6%. So the new model is reasonable and can be used for further study on borehole stability of the elastic-plastic formation.
出处
《石油钻探技术》
CAS
2003年第5期33-35,共3页
Petroleum Drilling Techniques
基金
国家自然科学基金重点项目(编号50234030)