关键词: 机械比能, 垂向功, 随钻监测, 功交汇, 物性评价

Abstract: In order to reduce the drilling cycle, it is necessary to improve the applicability of the mechanical specific energy model. In this paper, the mechanics analysis is based on the mechanical energy model proposed by R. Teale, the drilling pressure and torques of the vertical and inclined wells are modified respectively, and the intersection model is obtained. The results show that the vertical power is constant greater than that of tangential power at the same depth. When tthe vertical work is tangled with tangential work, the phenomenon of "venting" reflects the good geological properties of the layer. The merit model can better reflect the bottom, and the mechanical ratio can be more suitable for the evaluation of the physical properties of logging, avoiding the influence of non⁃objective factors on the baseline of the mechanical specific energy ratio model, and enhancing the accuracy of field physical property evaluation.

Key words: Mechanical specific energy, Vertical power, Monitoring while drilling, Reactive intersection, Evaluation of physical properties