胜利油田沾14-平18井水平段悬空侧钻技术

Hang Sidetrack Technology for horizontal section well of zhan14-ping18 in shengli Oilfield

沾14-平18井在水平段正常地质导向钻进时,由于地层突然变化导致井眼轨迹偏离储层,然后在储层的上部紧邻井段,采用悬空侧钻技术成功地回到储层,悬空侧钻避免了水平段打水泥塞,不仅减少了钻井周期,提高机械钻速,还提高了储层钻遇率,为实现预计油气产量提供了保障。文中介绍了该井产层段基本情况、侧钻缘由及悬空侧钻的技术原理、侧钻点的选择依据、钻具组合、主要技术措施、施工简况及效果,得出了一些认识和建议。

In the formation evaluation while drilling ot the horizontal section of zhanl4--pingl8, sud- den changes of formation lead to well trajectory deviating from the reservoir. In order to back to reservoir, Hang sidetrack technology was adopted successfully close to the well section, And then in the upper part of the reservoir close to the well section of upper reservoir. Hang sidetrack drilling avoid to plugging the well in horizontal section, not only reduced the drilling cycle, improved the ROP and reserves drilling rate, but also provided protection for the realization of oil and gas production that were expected to. This paper introduced the basic situation of the well productivity zones, sidetracking reason and technical principle, sidetracking point selection basis, BHA, the main technical measures, construction profiles and effective- ness, and obtained some understanding and recommendation.