套管封隔器分段压裂管柱遇卡原因分析及解决方案

The Analysis and Solution of Sticking in a Staged Horizontal Well Fracturing with a Casing Packer

刘红磊 陈作 周林波 秦红祥 杨同玉 薛占峰

LIU Honglei CHEN Zuo ZHOU Linbo QIN Hongxiang YANG Tongyu XUE Zhanfeng

页岩油气富集机理与有效开发国家重点实验室，北京 102206 中国石化石油工程技术研究院，北京 102206 中国石化华北油气分公司，河南郑州 450006

State Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Effective Development, Beijing, 102206, China Sinopec Research Institute of Petroleum Engineering, Beijing, 102206, China Sinopec North China Oil and Gas Company, Zhengzhou, Henan, 450006, China

为了降低套管封隔器分段压裂的施工风险，解决压裂结束后套管封隔器分段压裂管柱上提易遇卡的问题，以某区块一口水平井的套管封隔器分段压裂为例，从压裂管柱上提时的载荷、上下活动距离和返排液性质等特征因素入手，详细分析了该井前3段压裂后压裂管柱上提遇卡的原因，并制定了解卡措施，压裂管柱顺利解卡。为防止后续6段压裂再出现压裂管柱上提遇卡的情况，对套管封隔器分段压裂管柱进行了优化，采用优化后的压裂管柱顺利完成了该井后续6段的压裂，且压裂管柱全部安全顺利起出。该井处理套管分段压裂管柱上提遇卡的方法和制定的措施及优化的压裂管柱，为今后类似问题的处理和压裂管柱的优选提供了借鉴。

The fracturing string of a casing packer may easily get stuck when being lifted back to the surface after a fracturing treatment. To decrease the potential risk in staged fracturing operation, this paper analyzed pipe sticking while lifting fracturing string after three stages of fracturing based on load, free space along borehole, flowback fluid properties, and other characteristic factors taking a staged hydraulic fracturing operation in a horizontal well of a field as an example, and established measures to smoothly release the stuck of fracturing string. In addition, the fracturing strings of the casing packer were optimized to prevent it from being stuck during the subsequent six stages of hydraulic fracturing. The optimized fracturing strings were successfully applied in the subsequent six stages with smooth and safe lifting of all the fracturing strings. The proposed measures and optimized fracturing string can provide a reference for the treatment of similar problems and the optimization of fracturing strings in the future.

中国石化科技攻关项目“盐间页岩油增产工艺及试采技术研究”（编号：P19013-5）资助

https://doi.org/10.11911/syztjs.2021017