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一、前言在岩心钻探工程中，机械钻速对于确定岩石的可钻性是一个重要的参数。我国岩心钻探岩石十二级分级表就是在生产现场进行大量实际标定后所制定出来的。以机械钻速为主要指标的岩石可钻性分级表。这种用现场实际生产效果来度量岩石可钻性的办法，在钻探生产发展过程中逐渐暴露出许多缺点。当前关于岩石可钻性研究的一种趋向是利用岩石多种物理力学性质指标来表示岩石的可钻性。尽管如此，机械钻速毕竟是一个同时受到技术条件、人为因素和岩石可钻性综合影响的复杂指标，它有直观反映
I. INTRODUCTION In core drilling engineering, ROP is an important parameter for determining the rock drillability. The 12-grade grading table for rock core drilling in China was developed after a large number of actual calibrations at the production site. The rock drillability rating table is based on the penetration rate of the mechanical drilling rate. This method of measuring the drillability of rock using the actual production effects of the site has gradually exposed many defects in the development of drilling production. One of the current trends in the study of rock drillability is the use of various physical and mechanical properties of rock to represent the drillability of rocks. In spite of this, the ROP is a complex index that is affected by both technical conditions, human factors, and rock drillability. It is intuitively reflected.