论文部分内容阅读
目前确定地层岩石可钻性的方法主要是基于室内微钻头实验测算岩心抗钻能力,这种方法需要大量的岩心,费用高,周期长,且常常滞后于实际钻进。通过分析实钻参数与钻头破岩的体积功密度之间的关系,从能量耗散的角度建立了应用岩石破碎比功评价岩石可钻性的模型,通过现场实际应用证明该模型能动态的反映实钻条件下的岩石可钻性,有利于实现随钻随测,弥补了传统可钻性评价方法的不足,为优快钻井技术中实时钻头优选和钻井设计提供了理论依据。
At present, the method of determining the drillability of formation rocks is mainly based on laboratory micro-drill experiments to measure the core resistance to drilling. This method requires a large number of cores, which have high cost, long period and often lag behind actual drilling. By analyzing the relationship between the actual drilling parameters and the volumetric work density of rock breaking, a model to evaluate the rock drillability of rock is established from the perspective of energy dissipation, and the model can be dynamically reflected through on-site practical application The drillability of rock under real drilling conditions is conducive to realize the measurement while drilling, which makes up for the deficiency of traditional drillability evaluation methods and provides a theoretical basis for the real-time bit optimization and drilling design in the fast drilling technology.