水平井地质导向技术在三塘湖盆地的应用

Application of Horizontal Well Geosteering Technique in Santanghu Basin

摘要: 地质导向技术是保证水平井钻进中井眼顺利着陆，并在目的层顺利穿行达到设计水平段长度的关键技术。受现场钻井技术条件的限制，目前三塘湖盆地实施的水平井中主要以常规地质录井、气测录井、随钻伽马作为钻井地质导向的技术支撑。通过该技术能较精确地预测着陆点深度、判断钻头着陆和钻头在油层中的位置，及时指导钻进方向，保障井眼轨迹尽可能多地位于油层中，在现场实践中效果显著，对三塘湖盆地的水平井施工具有重要的指导意义。

Abstract: Geosteering was the key technique ensuring smooth landing and penetrating through the de-signed horizontal sections. Limited by drilling technical condition in the oilfield, only three means were used for geosteering, such as conventional mud logging, mud gas log and GR of LWD. By applying the geosteering technique described in this article, the depth of landing point can be accurately predicted, and landing status and bit position in the reservoir can be determined to steer the drilling direction to ensure the hole to run within the reservoir as much as possible. Obvious result is obtained in actual drilling, and it is of great significance in the horizontal well drilling in Santanghu Basin.