打捞老井套管复杂情况的处理与认知

Treatment and Cognition of Complex Situation of Fishing Old Well Casing

朱威 陈刚 文发宝 季策 姚远

ZHU Wei CHEN Gang WEN Fabao JI Ce YAO Yuan

中海油能源发展股份有限公司上海工程技术分公司，上海　200335 中海石油 （中国）有限公司上海分公司，上海　200335 中国石油化工股份有限公司上海海洋油气分公司，上海　200120

Engineering Technology Shanghai Branch, CNOOC EnerTech-Drilling & Production Co., Shanghai 200335, China Shanghai Branch, CNOOC (China) Ltd., Shanghai 200335, China SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

部分海上油气田已经进入了开发后期，剩余井槽数量不能满足勘探开发的需要，建新的生产平台钻新井不满足经济效益，所以需要对老井进行弃置进而利用老井井槽钻新井。在处理老井套管过程中出现套管贴边严重、井筒无返出，不满足套铣、磨铣条件时，利用割刀、打捞矛等进行处理，针对打捞工具插入困难、套管遇阻卡的特殊情况，进行分析处理，顺利回收套管，达到侧钻要求，对后续此类作业有一定的指导意义。建议在海上老井弃置时使用割刀及打捞矛处理特殊情况并回收套管。

Some of the offshore oil and gas fields have entered the late stage of development. The number of remaining well slots cannot meet the needs of exploration and development. Building new production platforms to drill new wells does not meet economic benefits. Therefore, it is necessary to abandon old wells and then use old well slots to drill new wells. In the process of disposing old well casing, the casing is seriously attached, the wellbore does not return, and the conditions of casing milling and grinding are not satisfied. Cutters and fishing spears are used to deal with the problems. Aiming at the special situation of difficult insertion of fishing tools and casing blockage, the analysis and treatment are carried out to recover casing smoothly and meet the requirements of sidetracking, which has certain guiding significance for subsequent such operations. It is recommended to use cutters and fishing spears to handle special cases and recover casings when old offshore wells are abandoned.

https://doi.org/10.3969/j.issn.1008-2336.2023.02.074