【摘要】 在进行钻井工艺设计中 ,对钻头的选择及其可钻性的评价主要选取本地区具有代表性强度和硬度的岩心进行室内可钻性实验 ,进而对地层岩石可钻性进行分级评价。这种方法由于取心的局限性 ,尤其在新区井少的情况下限制了此方法的应用。通过分析声波时差与影响岩石可钻性地质因素的关系 ,建立了声波时差与岩石可钻性指数的评价模型。利用该模型对油田实际资料进行了分析 ,根据可钻性剖面确定了合适的钻头类型 ,取得了良好的应用效果更多还原

【Abstract】 Application of Sonic Logs to Rock Drillability and Bit Selection.WLT, 2001, 25(4): 305-307 The bit selection and evaluation of rock drillability in drill technological design depend on core drillability test which must represent the core strength and hardness in local areas. This method is limited by coring itself, especially in new exploration regions. In this paper an evaluation model for rock drillability and sonic logs is presented by analysing the relationship between sonic moveout and geological factors which influence rock drillability. The model is used to analyse practical log data from oilfield and the bit types have been determined by drillability sections, which proves this model has better applications.更多还原