应用录井参数综合判别岩性

使用PDC钻头钻进时，机械钻速快，岩屑细小，钻时变化不明显，造成地质录井困难，因此，必须找出更直观，快捷的方法判别岩性，以适应现代录井之要求，东海西湖凹陷几口钻井实践表明，扭矩曲线和顶驱转速曲线形态的变化，气测值的变化与岩性有着密切关系。这些录井参数的综合应用，对快速建立岩性剖面，及时发现油气层，卡准取心层位有着重要意义。

Distinguishing Lithology Synthetically with Logging Parameter

PDC bit can make some difficulties in geological logging because of it's fast rate of drilling, the fine cuttings and the small change of the drilling time. So it is necessary to find more effective method to distinguish the lithology. The geological logging in Xihu Trough makes it clear that the lithology has close relation to the curve change of torque and the rate of top drive, and it is important to apply these logging parameters in order to establish the lithology section fast, to discover the oil and gas layer in time and to fix the cored layer exactly