土库曼雅士拉205 井产层堵漏解卡工艺

Formation plugging and pipe-stuck freeing technology for Well 205 in Turkmenistan Yashila block

赵建震 巫道富 陈鑫 杨晓冰 高利华 张长庚

ZHAO Jianzhen WU Daofu CHEN Xin YANG Xiaobing GAO Lihua ZHANG Changgeng

低渗透油气田勘探开发国家工程实验室·川庆钻探钻采工程技术研究院，陕西西安　710021 川庆钻探国际工程公司，四川成都　610051

State Key Laboratory of Low-permeability Oil and Gas Field Exploration and Development, Drilling Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Company Limited, Xi’an, Shaanxi 710021, China International Engineering Company, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, Sichuan 610041, China

土库曼尤拉屯雅士拉区块产层灰岩孔隙发育，存在多套压力体系，在油气层钻进中经常发生井漏、卡钻、溢流等复杂情况。205 井为该区块第1 口完成设计井深5 000 m 的探井，针对该井产层井漏、卡钻的原因及处理过程进行了分析总结，采用关井反推法憋压堵漏控制预防溢流和井喷的发生，同时采用泡解卡剂、泡酸、注清水降压等解卡工艺，成功解决了205 井产层漏、卡、喷共存的问题，顺利完成了该预探井的施工任务，为该区块的后续钻探开发提供了可借鉴的经验。

In the Yashila block, Yuratun, Turkmenistan, the limestone reservoir is porous, where there are several pressure systems. During drilling in oil and gas layers, many complexities occurred frequently, such as mud loss, pipe sticking and overflow. Well 205 is the first exploratory well in this block reaching the design depth of 5 000 m. In this paper, the cause and treatment regarding to mud leakage and drill sticking are analyzed. The shut-in inverse method is used to control and prevent overflow and blowout. Moreover, stuck pipe-freeing soak, acid soak and injection of fresh water for reducing pressure are used to free the stuck pipe. In this way, the coexistence of mud leakage, drill sticking and overflow in Well 205 is addressed successfully. The conclusions provide good reference for subsequent exploration and development operations in this block.

10.13639/j.odpt.2014.03.028