页岩气双二维水平井轨迹优化设计与应用  

Optimization of Shale Gas Dual-2D Horizontal-Well Trajectories and Its Application

作　　者：刘茂森[1,2] 付建红[1,2] 白璟 

机构地区：[1]油气藏地质及开发工程国家重点实验室,四川成都610500 [2]西南石油大学,四川成都610500 [3]中国石油川庆钻探工程有限公司,四川成都610051

出　　处：《特种油气藏》2016年第2期147-150,158,共4页Special Oil & Gas Reservoirs

基　　金：国家"973"项目"页岩气水平井井眼轨迹优化设计与地质导向理论研究"(2013CB228003)

摘　　要：水平井井眼轨迹设计是"井工厂"模式开发页岩气的重要组成部分,研究合理的井眼轨迹有利于降低页岩气钻井施工难度,提高经济效益。针对页岩气水平井的钻井难点,提出了双二维井眼轨迹设计方法。从降低钻井成本、减小钻柱摩阻扭矩、防止丛式井相碰等方面对比分析了双二维水平井相对于三维水平井的优点。结果表明:将水平井的轨迹设计在2个相交的铅垂面中,在每个铅垂面内只有井斜变化没有方位变化,大大降低了钻井施工难度;在钻具组合和工程参数相同的情况下,双二维水平井的水平段摩阻扭矩更小;同时,双二维水平井在降低导向钻井成本和邻井碰撞风险等方面具有明显优势。双二维水平井轨迹优化设计方法可有效降低页岩气井水平井钻井成本,实现页岩气藏的高效开发。Horizontal well trajectory optimization is one of the crucial parts in'Well-Factory'operating mode,which also is favorable to well drilling operation and increase economic efficiency. A dual-2D horizontal-well trajectory optimization is proposed by considering the challenging problems of drilling operation in shale gas reservoir. The comparison between dual-2D horizontal-well trajectory and 3D trajectory optimizations is provided,including drilling cost,drill-string friction-torque and cluster-well anti-collision. Research demonstrates that 2D horizontal well-trajectory is designed in two intersecting vertical planes with inclination data and without azimuth data,which is more favorable to well drilling operation. The lateral section friction-torque of dual-2D horizontal well optimization is lower than that of 3D trajectory optimization. In addition,the dual-2D horizontal-well trajectory optimization is more effective in drilling cost reduction and anti-collision of adjacent wells. Dual-2D horizontal-well trajectory optimization could effectively reduce drilling cost and achieve efficient development of shale gas reservoir.

关 键 词：页岩气 双二维水平井 井眼轨迹 摩阻扭矩 防碰 长宁H1井 

分 类 号：TE243[石油与天然气工程—油气井工程]