页岩气“井工厂”水平井组防碰技术研究  

Anti-collision Technology of Horizontal Well Groups in Shale Gas “Well Factory”

作　　者：刘茂森[1] 付建红[1] 白璟 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]川庆钻探工程公司钻采工程技术研究院

出　　处：《石油机械》2016年第6期14-18,23,共6页China Petroleum Machinery

基　　金：国家973计划项目"页岩气水平井井眼轨迹优化设计与地质导向理论研究"(2013CB228003)

摘　　要：随着"井工厂"钻井模式在页岩气开发中的广泛应用,传统的邻井距离计算方法和Wd W误差模型已经不能满足现场对井眼防碰的要求。针对无线随钻测量工具MWD的特点,详细分析了测量误差源,并给出了相应的误差源权函数。基于数理统计理论,将每个误差视为独立的误差源,建立了误差分析模型,探讨了轨迹空间位置不确定性协方差矩阵的构建方法,并以此为基础,推导了误差椭球公式。根据长宁区块的实钻数据进行了井眼轨迹防碰计算分析。分析结果表明,误差分析模型能够更直观地展示比较井和参考井的相对位置,更精确地计算邻井的相碰概率。研究结果可为今后页岩气"井工厂"的防碰分析提供参考。With the widely applied ＂well factory＂drilling model in shale gas development,the traditional calculation method of well trajectory distance and Wd W error model can no longer meet the requirement of the wellbore anti-collision. For wireless MWD tool,the sources of measurement error has been detailed,and the corresponding error source weighting function has been presented. Based on the theory of mathematical statistics,error analysis model has been established by considering each error as an independent source of error. The covariance matrix construction method for spatial position uncertainty of trajectory has been discussed. Based on the above,the error ellipsoid formula has been derived. Well trajectory anti-collision calculation and analysis has been conducted based on actual drilling data of Changning block. The results show that the model could provide more intuitive relative position of the reference well and offset well,and more accurate probability of collision,providing a reference for the future anti-collision analysis of shale gas ＂well factory＂.

关 键 词：页岩气 井工厂 邻井距离 防碰 误差源 权函数 

分 类 号：TE243[石油与天然气工程—油气井工程]