LWD随钻测井系统机械结构设计探讨

Research on Mechanical Design of Logging While Drilling Systems

LWD随钻测井系统能够实时提供地层和井眼信息,对地层做出快速评价,优化井眼轨迹和地质目标,指导钻进,在大位移井、水平井及其他疑难井中得到了广泛的应用。对中国石油集团钻井工程技术研究院自主研发的DRLWD随钻测井系统中的电磁波电阻率随钻测量系统、中子孔隙度随钻测量系统及数据传输系统的机械结构进行分析,主要对设计中的技术难点和解决方案进行了阐述。总结出井下随钻测井系统机械设计的一些经验和方法。

LWD can provide real time formation and well bore information,make quick formation evaluation,optimize Well trajectory and geological target,supervise drilling.It has been applied extensively in extended reach well,horizontal well and other wells difficult to drill.The mechanical design of LWD developed by CNPC Drilling Research Institute is introduced,focusing on the electromagnetic resistivity MWD system the neutron porosity MWD system and data transfer system in detail with respect to difficulties and solution.Finally some technique and experience of LWD mechanical design are presented.