考虑损伤和孔隙压力的油井井壁稳定条件  

STABLE CONDITION OF SIDEWALL CONSIDERING DAMAGE AND PORE PRESSURE

作　　者：李忠华[1] 潘一山[1] 

机构地区：[1]辽宁工程技术大学力学与工程科学系

出　　处：《钻采工艺》2002年第1期27-29,共3页Drilling & Production Technology

摘　　要：将岩石视为多孔介质 ,考虑孔隙压力和井壁损伤 ,应用弹塑性理论和损伤力学 ,导出了井壁围岩的应力分布规律 ,并根据极值点失稳理论提出了井壁稳定条件。分析了临界损伤区深度和临界载荷随E/λ、内摩擦角。Rocks are treated as porous medium.Damage and porous pressure of wellbore are considered in this paper.Elastic-plastic theory and damage mechanics are used to deduce the stress distribution regularity of rocks around wellbore.According to theory of limit point of stability,wellbore stable condition is put forward.The paper analyses the change laws that critical load and critical damage depth vary as E/λ,internal frictional angle and effective porosity changes.

关 键 词：油井 井壁稳定条件 孔隙压力 临界载荷 损伤 

分 类 号：TE21[石油与天然气工程—油气井工程]