文92-平1深层水平井钻井技术

The Drilling Technology of Wen92-p1 Horizontal Well in Deep Reservoir

文 92 -平 1井是中原油田第一口超薄油藏深层水平井 ,地层硬 ,井深 ,压力系数高 ,二开裸眼段长 ,油层薄 ,地层不确定程度高。通过采用聚合醇 -正电胶钻井液体系 ,选用高效PDC定向钻头 ,精心设计钻具结构和钻井参数 ,以及得力的井下安全措施 ,使该井完全满足了甲方要求 ,全井安全无事故。

As the first horizontal well drilled in the deep ultra thin resevoir in Zhongyuan Oilfield,Wen92 p1 is the most difficult well drilled in recent years,due to the hard formation,deep depth,high pressure coefficient,long open hole section,thin resevoir and highly uncurtainty of formation condition,etc.Multiple modifications were carried out on geology design during drilling,and the vertical depth was continuously adjusted to trace the reservoir,causing great difficulties on hole trajectory controlling.Regular borehole was achieved by applying the steerable BHA and MWD,and the use of polyol positive colloid drilling fluid system ensured the downhole safety;high efficient PDC bit was selected,and proper BHA and drilling parameters were optimized.