为了解决渤海在生产油田面临的井槽、井筒资源紧张,储层产能释放程度受限,水淹储层高含水加剧等问题,通过技术攻关和工程实践,形成了以井槽、井筒高效利用,海上压裂增产,水淹储层高效控水为代表的渤海油田稳产增产钻完井技术体系。主要技术成果指标包括:中短半径侧钻技术全角变化率可达到18.97°/30 m,近钻头测斜盲区由23 m缩短至0.6 m,突破技术瓶颈;压裂充填技术可实现177.8 mm套管内的1趟6层压裂充填作业,突破作业极限;可充填式自适应防砂控水一体化技术创新采用“双层筛管、内层基管不打孔”的形式结构,实现了控水和防砂双重目标。基于油田未来面临的工程技术难题,建议在浅水水下井口开采模式、精细化可控超短半径侧钻技术、海上大规模压裂作业模式和多专业协同控水模式等方面持续攻关,为渤海油田实现稳产增产目标提供技术保障。

During the production process, Bohai Oilfield faced many challenges, such as tight well slot resources, restrained reservoir production capacity release, and intensified high water cut in water flooded reservoirs. Through technical research and engineering practice, a production-enhancing drilling and completion technology system had been develped in Bohai Oilfield, characterized by efficient utilization of well slots and wellbore, offshore hydraulic fracturing, and efficient water control technology for flooded reservoirs. The main technical achievement indicators include: The full angle change rate of medium and short radius sidetracking technology reached up to 18.97°/30 m, and the blind spot of near-bit inclination measurement was shortened from 23 m to 0.6 m, overcoming the technical bottleneck; The fracturing and packing technology enabled a single six-layer fracturing and packing operation within the 177.8 mm casing, surpassing the operational limit; The integrated technology innovation of packing adaptive sand control and water control adopted a structure of “double layer screen tube, inner layer base tube without drilling”, achieving the dual goals of water control and sand control. Faced with the engineering and technical challenges in the future, it is recommended to continue to tackle key issues in shallow water wellhead mining mode, refined and controllable ultrashort radius sidetracking technology, large-scale offshore fracturing operation mode, and multidisciplinary collaborative water control mode to provide technical support for achieving stable and increased production targets in Bohai Oilfield.