石油钻采工艺Issue(5)：5-9,5.DOI:10.13639/j.odpt.2015.05.002
影响煤层气水平井井壁稳定性的地质因素分析
Analysis of geologic factors affecting wellbore stability of CBM horizontal wells
摘要
Abstract
This paper intuitively describes the features of instability and collapse of coalbed horizontal wells by downhole measurement, analyzes the relation between the coalbed horizontal well stability and burial depth and coal sturdiness, and compares and analyzes the actual drainage data of the available CBM horizontal wells in Jincheng District. This paper identiifes the main geologic factors affecting the CBM horizontal well stability as below: small and micro structures, ground stress and burial depth. The small and micro structures cause the horizontal hole to easily penetrate the soft coalbed, and ground stress and burial depth may increase the stress on the well wall and hence cause wellbore instability and collapse. The conclusions in this paper provide theoretical basis for preventing wellbore instability from geology.关键词
煤层气水平井/失稳垮塌/小微构造/埋藏深度/地应力Key words
CBM horizontal well/instability and collapse/small and micro structure/burial depth/ground stress分类
能源科技引用本文复制引用
杨健,倪元勇,王生维,秦义,刘伟,胡奇..影响煤层气水平井井壁稳定性的地质因素分析[J].石油钻采工艺,2015,(5):5-9,5.基金项目
国家重点基础研究发展计划（973计划）“煤层气开发多分支水平井控制机理”（编号2009CB219608）资助。 （）
