摘要
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。东海西湖凹陷数口井实践表明,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。
Drilling by PDC bit will makes geologging difficult due to fast mechanical ROP,fine cuttings,unobvious variation of drilling time,thus we have to find a more direct and fast way to distinguish lithology in order to meet the needs of modern logging.It has been shown from a number of wells in the West Lake Depression of the East Sea that the changes of torque curve form,top drive RPM curve form and gas logging parameters have close relationship with lithology.To use these logging parameters comprehensively has a significant meaning for setting up lithology profile quickly,finding oil gas reservoir in time and sticking zone correctly.
