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在油价持续低迷,低油价成为常态的今天,一些海上的边际小油田由于储量低,经济评价差,无法实现开发,海油陆采主要采用大位移井、丛式井组技术进行开发,存在着表层定向易产生磁干扰、浅层大尺寸井眼定向困难、井网密集防碰绕障难度大等作业难点。通过井眼轨迹优化设计、不同井段优化钻具组合、旋转导向打井技术、大斜度井稳斜钻井技术以及三维防碰绕障等技术来克服钻井施工难度大的问题。本文主要针对海油陆采大型丛式井组钻井技术及应用进行研究,对今后浅滩及海上大面积的经济高效开发具有重要指导意义,同时积累了宝贵经验。
As oil prices continue to slump and low oil prices become the norm today, some offshore marginal small oilfields have been unable to realize development due to low reserves and poor economic evaluation. The development of offshore oilfields mainly involves the development of large-displacement wells and cluster well technology. Surface orientation prone to magnetic interference, shallow large-sized wellbore orientation difficulties, well-well anti-collision around the difficulty of difficult and difficult operation. Through the wellbore trajectory optimization design, optimization of the drilling assembly in different intervals, rotation-guided drilling technology, steep-inclined well drilling technology and three-dimensional collision avoidance technology to overcome the drilling difficulty. This paper mainly studies on the drilling technology and application of offshore oil-bearing large-scale cluster well group, and has important guiding significance for the economic and efficient development of large area of shoals and offshore areas. At the same time, it has accumulated valuable experience.