【摘要】 油田预测钻速工作难于开展的原因是：地层岩石可钻性统计指标Ｋｄ＇测定困难。为此，提出采用岩石可钻性能量法指标Ｋｎ计算预测钻速的方法。通过现场反复试验，又提出修正预测误差的两个新概念──全井段地层可钻性曲线和钻这系数。现场预测钻速结果表明，采用该方法预测钻速与实际钻速比较接近，可满足工程实际需要。更多还原

【Abstract】 Seeing that it is difficult to measure the index of rock formation drillability in an oil field,a new methbd for predicting drilling velocities is presented, which involves two new concepts for correcting the errors formulated. They are rock drillability curves and drilling velocity coefficient.Drilling velocities predicted by the method are consistent with ones obtained in reality.更多还原