文南油田优快钻井配套钻井液技术

Drilling Fluid Technology in Wennan Oilfield

文南油田断块多 ,地层复杂 ,稳定性差 ,易坍塌掉块 ;大部分区块含大段膏泥岩 ,易造浆 ,钻井液维护困难 ;地层压力层系较为紊乱 ,沙二下至沙三中大都含异常压力层 ,易涌易漏 ;钻井施工中“喷、漏、卡、塌”等事故频发 ,严重制约钻井速度的提高。通过应用固相清除技术、井壁稳定技术、随钻防漏技术等多项钻井液技术 ,效果显著 。

Wennan oilfield belongs to many faults oilfield. The formation is very complicated and unstable,and easily falls blocks or even caves in .In most blocks,there are long distance clay layers with gypsum that make it diffcult to keep the properties of the drilling fluid,and the pressure sequence of formation is not regular that easily result in blowout,mud lost,sticking the pipe and collapse in drilling process that affect the safety of downhole and limit the rate of drilling .With controlling solid,stabilizing the wall of the well and preventing mud lost etc technologies in drilling process,the drilling effect is satisfatied and drilling rate also have been improved.