普光地区安全钻井液密度窗口的测井方法研究  

The Determination of Safe Drilling Fluid Density Windows Using Well Logging Data in Puguang Area

作　　者：罗庆[1] 范翔宇[2] 夏宏泉[2] 刘旭春 王磊[4] 

机构地区：[1]中原油田分公司采油工程技术研究院 [2]西南石油大学石油工程测井实验室 [3]西部钻探测井公司 [4]青海油田采油二厂

出　　处：《钻井液与完井液》2008年第6期58-61,共4页Drilling Fluid & Completion Fluid

摘　　要：根据井壁围岩应力分布规律和强度破坏准则全面分析了井壁岩石的所有可能的破裂情况,在此基础上提出了利用测井资料确定安全钻井液密度窗口上下限的方法,并利用普光2井的资料对该方法进行了实例验证。结果表明,利用测井资料能较准确地确定安全钻井液密度窗口上限和下限,为钻井设计和实钻过程中采用合理的钻井液密度提供科学依据。The fracturing of rocks surrounding a bore hole is different under the pressure exerted by the mud column in the hole.The fracturing mechanism was analyzed in the light of the stress distribution around the hole and the strength breakdown criteria.The analyses,combined with electronic logging data,can be used to determine the density windows of drilling fluids.Using the data gathered from well Puguang-2,the upper and lower limit of mud densities were determined,and it was shown that the mud densities determined were safe for bore hole stabilization.

关 键 词：钻井液密度 井眼稳定 地层坍塌压力 地层破裂压力 

分 类 号：TE254.1[石油与天然气工程—油气井工程]