中短半径水平套管井侧钻设计与实践

Design and Practice of Sidetracking in Medium and Short Radius Horizontal Casing Wells

沈德新 陈立强 王占领 余建生

SHEN Dexin CHEN Liqiang WANG Zhanling YU Jiansheng

中海油能源发展股份有限公司工程技术分公司，天津　300459 中海石油（中国）有限公司天津分公司，天津　300459

CNOOC Ener Tech-Drilling & Production Co., Tianjin 300459, China CNOOC China Limited, Tianjin Branch, Tianjin 300459, China

为有效利用海上井槽，挖潜地层剩余油，对渤海油田一口出砂关停井海H1井进行侧钻治理。鉴于该井采用常规侧钻方式钻井费用较高，经济效益边界，设计海H2井采用中短半径侧钻技术，以减少作业进尺，降低钻井工期费用。同时，结合侧钻后目的层存在钻遇高含水层和泥岩夹层的风险，设计海H2井为水平套管井。后续在实施中，钻完井作业顺利，且投产后生产效果良好，实现了长时间的低含水生产。该井的成功实施，为渤海油田实现经济高效的低效井侧钻治理，提供了一个技术途径。

In order to effectively utilize offshore well slots and produce the remaining oil, the sidetracking technology was used on a shut-down well named Hai H1 in Bohai Oilfield due to sanding. In view of the high cost of drilling and the poor economic returns for using conventional sidetracking, the medium and short radius sidetracking technology was used by Well Hai H2 in order to reduce the footage and drilling cost. At the same time, considering the risk of encountering high water-flooded layers and mudstone interlayers after sidetracking, Well Hai H2 was designed to be a horizontal casing well. In the subsequent implementation, the drilling and completion operations went successfully, and a good result was obtained after production with low water content for long-term. The successful implementation of this well provides a technical approach to realizing economic and efficient sidetracking for the inefficient well in Bohai Oilfield.

https://doi.org/10.3969/j.issn.1008-2336.2022.01.082