裂缝井壁力学稳定性研究  

Study on stability of fractured borehole wall

作　　者：朱荣东[1] 陈平[1] 夏宏泉[1] 范翔宇[1] 

机构地区：[1]西南石油大学石油工程测井实验室,四川成都610500

出　　处：《断块油气田》2007年第5期56-58,共3页Fault-Block Oil & Gas Field

基　　金：四川省高校重点实验室基金项目(2006ZD46)资助

摘　　要：针对钻井过程中的井壁失稳问题,探讨了裂缝井壁失稳机理,主要考虑了井壁裂缝尖端的应力强度因子,采用有限元法和孔隙弹性理论研究自然裂缝地层中的井眼行为,分析裂缝井壁的稳定性。同时研究了不同参数对裂缝扩张和井壁稳定的影响,为正确认识裂缝井眼的稳定性提供了科学依据。This paper discussed the instability mechanism of borehole wall with cracks,mainly considered the stress intensity factors of crack tip.The wellbore behavior in fractal formation in this paper is analyzed by using finite element method and poroelastic theories,studying them to analysis the stability of wellbore wall with cracks.At the same time,we studied that the different parameters how to affect the crack extending and wellbore stability.Thus this paper offered the scientific foundation for correct understanding stability of wellbore wall with cracks.

关 键 词：井壁稳定 裂缝 应力强度因子 断裂力学 有限元 

分 类 号：TE21[石油与天然气工程—油气井工程]