水敏性地层钻井复杂处理监督对策

Supervise Countermeasures for Complex Drilling Treatment in Water Sensitive Formation

侏罗系头屯河组油藏具有中等偏强水敏性。文章针对该区块在旋转导向施工水平段钻进卡钻复杂,钻井监督没有盲目地照搬设计,下达指令采取接顶驱划眼的方式,使用泡油解卡方式成功解卡,有效减轻了对油层的伤害,不仅保证了较高的机械钻速,同时也使井眼轨迹的符合率和井身质量大大提高。

The reservoir of Toutunhe formation in Jurassic has medium to strong water sensitivity.In view of the complexity of drilling sticking in the horizontal section of rotary steering construction in this block,the drilling supervisor did not blindly copy the design,issued instructions,adopted the way of top drive reaming,and successfully released the sticking by using the way of soaking oil,which effectively reduced the damage to the reservoir,not only ensured the high ROP,but also greatly improved the coincidence rate of well trajectory and well bore quality.