井壁稳定地质力学分析  

REO-MECHANICS ANALYSIS FOR BOREHOLE STABILITY

作　　者：王桂华[1] 徐同台[2] 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中国石油天然气总公司老干部局

出　　处：《钻采工艺》2005年第2期7-10,共4页Drilling & Production Technology

摘　　要：系统分析了各种地质力学参数、井眼剖面参数对安全钻井液密度窗口的影响规律,这些参数有井斜角、方位角、原地应力状态、抗拉强度、抗剪强度、地层孔隙压力、有效应力系数和钻井液液柱压力对地层强度的影响等。同时研究了各参数定量变化对安全钻井液密度窗口影响的敏感性,为提高地层三个压力剖面预测精度进一步开展工作指明了方向。The influence of geo-mechanical parameters, borehole profile parameters on the safety density windows of drilling fluid for the formation has been given, which are built-in angle, azimuth angle, in-situ stress, tensile strength, shear strength, pore pressure, effective stress coefficient and soft parameter of formation by liquid head of water based drilling fluid. Then, the sensitivity of these parameters for the safety window has been analyzed quantitatively, which highlights the direction of further study of borehole stability.

关 键 词：井壁稳定 多孔介质弹性力学 原地应力状态 安全钻井液密度窗口 坍塌压力 破裂压力 

分 类 号：TE21[石油与天然气工程—油气井工程]