At present all kinds of formation drillability evaluating methods belong to after drilling analysis that is, these methods can be used only for calculating the drillability of the drilled stratum.
目前地层可钻性的各种评测方法均属钻后分析方法 ,即只能对已钻地层的可钻性进行计算。
参考来源 - 深部实钻地层可钻性评测新方法·2,447,543篇论文数据，部分数据来源于NoteExpress
D index is also called formation drillability index (dimensionless).
指数也称地层可钻性指数(无量钢)。
This method was applied to predict the formation drillability of Fugu1Well in Changqing Oilfield.
应用该方法对长庆油田富古1井的地层可钻性进行了预测。
The correlation between the formation drillability grade and bit type has been basically established.
按资料建立了级别-类型关系；提取了地层可钻性梯度信息。
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