中江气田致密砂岩气藏“井工厂”钻井井眼轨迹控制技术

针对中江构造丛式井组井间防碰压力高、轨迹控制难度大及钻井周期长等难题，借鉴国内外页岩气藏“井工厂”轨迹控制技术成功经验，研究形成了以槽口-靶点优化布置、“多增式”井眼轨道设计、直井段防斜打快及井间防碰为核心的致密砂岩气藏“井工厂”钻井井眼轨迹控制技术，并首次将该技术应用到JS33-19HF平台6口井开发中。现场应用表明，优化后的轨道设计及轨迹控制技术保障了井身质量、提高了机械钻速，井组平均机械钻速较设计提高了54.1 %，实际钻井周期缩短102.47 d。该技术的成功应用对致密砂岩气藏的高效开发具有重要借鉴意义。

Well path control technology of Well Factory in Zhongjiang gasfield tight sandstone gas reservoir

The cluster well group in Zhongjiang structure is faced with a series of difficulties, e.g. stressful interwell anti-collision, difficult trajectory control and long drilling cycle. To deal with these difficulties, the "well factory" trajectory control technology for tight sandstone gas reservoirs was developed referring to domestic and foreign successful experience of "well factory" trajectory control technologies for shale gas reservoirs. This technology takes notch-target point arrangement optimization, "multi-increase" borehole trajectory design, deviation control and fast drilling of vertical hole section and interwell anti-collision as the core. This technology was, for the first time applied to the development of 6 wells on JS33-19HF pad. It is indicated that based on the optimized trajectory design and the trajectory control technology, wellbore quality is guaranteed and rate of penetration (ROP) is increased. Average ROP of the well group is 54.1% higher than the designed value and the drilling cycle is actually shortened by 102.47 d. The successful application of this "well factory" trajectory control technology for tight sandstone gas reservoirs plays an important guiding role in the efficient development of tight sandstone gas reservoirs.