Abstract: The amsotropic drilling characteristics of formation and drill bit are comprehensively expressed by equivalent equations deduced from a rock-bit interaction model. This paper pre-sents an analvsis method with which the effects on typical formation and drill bit on the well-bore trajectory may be diagrammatically illustrated. This method is easily accepted by fieldennineers.

Key words: rock drillability, formation anisotropy, drill bit, interaction, directional well, borehole trajectory

摘要： 应用钻头与地层相互作用模型^[1],对钻头和地层的各向异性钻井特性进行了综合分析研究,给出了相应的等效表达式.在此基础上,本文提出了一种图形分析方法,从而可以在微机上以彩色图形直观显示钻头和地层各向异性对井斜变化和方位漂移的影响规律,便于钻井技术人员理解和使用.

关键词: 岩石可钻性, 地层各向异性, 钻头, 作用定向井井眼轨迹