摘要
与传统随钻测量设备相比,基于有源交变磁场的导向定位技术可精确定位钻进井眼轨迹。通过研究旋转正交磁偶极子在空间的传播特性,利用低频交变磁场作为信号源,经目标靶区磁场信号采集与处理,结合常规随钻测量技术,计算出钻头与目标靶点间的相对方位和距离偏差。进而可指导钻进操作,准确确定钻进目标靶区。在水平定向连通作业过程中,以国外进口RMRS仪器为基准,将自主研发的国产RMRS仪器采集数据和解算结果与之对比。国产RMRS仪器偏航角差最大2.05°,最小0.47°。工程应用表明,该技术具备高精度井轨迹定位能力,可满足水平对接连通井的工程导向要求。
The well trajectory can be precisely calculated with a guided-orientation method based on rotating magnetic field compared with traditional measurement while drilling （MWD） method. Investigated are the characteristic signals of the rotating perpendicular magnetic dipoles. With low frequency variation magnetic field as signal source and processing the signals at the target side, the relative position and distance error between drilling bit and target can be finally determined by combining with normal MWD method. Thereby, the necessary drilling data is provided to accurately guide drilling operations in the target area. In the process of horizontallybutted well oriented connection operation in Zhongma U1 well, we compare acquired data and calculated data of domestic RMRS instrument with that of imported RMRS instrument, which shows that the maximum yaw angle difference of domestic RMRS instrument is 2.05°, and the minimum yaw angle difference is 0. 47°. The drilling operation shows that this technique can meet the highly reliable and precise guided-orientation requirement of horizontally-butted wells.
出处
《测井技术》
CAS
CSCD
北大核心
2013年第3期249-252,共4页
Well Logging Technology
基金
国家"863"高技术研究发展计划项目(2009AA093501)
中国石油化工集团公司"十条龙"科技攻关项目(JP11006)
关键词
随钻测量
旋转磁场导向
复杂结构井
磁偶极子
轨迹定位
偏航角
measurement while drilling
rotated magnetic oriented technology
complex structurewell
magnetic dipole
track orientation
yaw angle
