准噶尔盆地准东区块大位移井造斜段井壁失稳机理研究  

STUDY ON BOREHOLE STABILITY MECHANISM IN DEFLECTING SECTION OF EXTENDED REACH WELL IN ZHUNDONG BLOCK OF JUNGGAR BASIN

作　　者：张骋 张昕 陈智芳[2] 孙灵燕[2] 秦继明 

机构地区：[1]中国石油大学地球科学与技术学院 [2]中石油青海油田分公司天然气开发公司

出　　处：《钻采工艺》2014年第5期22-24,8,共3页Drilling & Production Technology

基　　金：四川省教育厅人文社科重点研究基地项目"鄂尔多斯盆地岩性气藏储量综合评价方法及应用研究"(编号:川油气科SKZ07-01)的资助

摘　　要：根据井壁稳定的岩石力学机理和有效应力理论,分析了大位移井井周的应力分布规律,建立了大位移井井壁稳定的力学模型,并根据库仑-摩尔强度准则判断造斜段各点的稳定性。对新疆准噶尔盆地准东区块的实际资料进行了水平井造斜段稳定性研究,研究结果表明,该区块的垂向应力为第一主地应力,3主应力差值相差较小,同时该口井的造斜段各点井壁稳定性较好,造斜段比较稳定,不易发生坍塌。Based on stable rock mechanical mechanism of borehole wall and the effective stress theory,the stress distribution around the borehole wall was analyzed,the stability mechanical model of extended reach well was established. The stability of deflecting section of extended reach well in Zhundong Block of Junggar Basin was studied based on the Coulomb-Moore strength criterion. The research results showed that the vertical stress was the first principal stress in the block,and there was a few difference among the principal stresses. The wellbore stability of the deflecting section was better,and it is very difficult to collapse for the borehole.

关 键 词：大位移井 造斜段 井壁稳定 有效应力 库仑-摩尔强度准则 主应力 

分 类 号：TE21[石油与天然气工程—油气井工程]