摘要
伴随着我国的页岩气水平井,丛式井,复杂3D井的增加,传统滑动造斜工具由于钻进时钻柱不转动导致井眼不光滑,扭矩摩阻大等原因引起的井下事故率也越来越高。以静态推靠式旋转导向为例,介绍旋转导向工作原理,对比传统造斜工具,列出旋转导向工具旋转钻进,精准控制轨迹,井眼光滑等优点。并通过实例分析,验证了旋转导向钻井工具在页岩气钻进过程中实时上传地质数据,根据地质情况实时调整轨迹,准确进入靶区。钻进过程中井眼轨道连续光滑、控制狗腿度小于6.1°/30m,在造斜段、水平段摩阻小于140 k N,扭矩小于12 k N·m,钻压传递效率高,加快了机械钻速,提高了钻井质量。
Along with the increasing of shale gas horizontal, cluster and complex 3D wells, borehole accident rate from traditional slide deflecting tool is increasingly higher because of drill string not spinning caused rough borehole wall, large torque, friction caused bore?hole accident rate higher and higher. Taking the static sidewall contact rotary steering as example, introduced operational principle of rotary steering, by contrast with traditional deflecting tool, the former has strong points of accurate control of drilling tracks, smooth boreholes etc. Through case study analysis, verified during shale gas drilling, the rotary steering drilling tools can upload geological da?ta in real time, according to geological condition adjusting drilling track in real time, correctly turn into target sector. During the drilling processes, the drilling tracks kept steady and smooth, controlled dogleg less than 6.1°/30m. In deflecting sector, friction of horizontal part is less than 140kN, torque less than 12kN · m, high bit pressure transmission efficiency, thus speeded up penetration rate, im?proved drilling quality.
出处
《中国煤炭地质》
2015年第6期74-76 81,81,共4页
Coal Geology of China
关键词
页岩气
水平井
旋转导向
井眼轨迹
shale gas
horizontal well
rotary steering
drilling track
