水平井桥塞分段压裂管外光纤监测技术

External fiber optic monitoring technology for staged bridge plug fracturing in horizontal wells

董小卫 田志华 李一强 汪志 韩光耀 唐家财 刘帅

DONG Xiaowei TIAN Zhihua LI Yiqiang WANG Zhi HAN Guangyao TANG Jiacai LIU Shuai

中石油新疆油田分公司工程技术研究院 中国石油集团测井有限公司新疆分公司

Engineering Technology Research Institute , PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China Well Logging Co., Ltd., CNPC Xinjiang Company, Karamay 834000, Xinjiang, China

针对水平井桥塞分段压裂各簇改造效果无法实时监测的难题，设计了水平井桥塞分段压裂管外光纤监测完井管柱。耐磨损铠装特种光缆、可穿越光缆扶正器确保了光缆安全入井，井口光缆闸阀穿越、管外光缆方位磁通量探测(定位误差 ≤ 3°)和双线性定向避射方法有效保障了施工过程光缆的完整性，实现了井下光纤信号的连续传输。在新疆油田进行了现场试验，验证了该技术可实现压裂过程分簇射孔、各簇进液、桥塞密封、暂堵转向等动态信息的在线实时监测。该技术为非常规油气水平井压裂效果实时监测提供了新思路、新方法。

During staged bridge plug fracturing in horizontal wells, the stimulation effects of each cluster can not be monitored in real time manner. To address this challenge, an external fiber optic monitoring completion string for staged bridge plug fracturing in horizontal wells was designed. The specialized wear-resistant armored optical cable and the cable traversing corrector enable the safe entry of the optical cable into the well. The wellhead optical cable gate valve penetration, external cable azimuth magnetic flux detection (positioning error ≤ 3°) and the bilinear directional perforation avoidance method effectively ensure the integrity of the cable during the operation , enabling continuous transmission of fiber optic signals underground. Field trials were conducted in Xinjiang Oilfield, validating the technology's ability to achieve real-time online monitoring of dynamic information during fracturing, such as clustering perforation, fluid intake into each cluster, bridge plug sealing as well as temporary plugging and diversion. This technology provides a new idea and method for real-time monitoring the staged fracturing effects of unconventional oil and gas horizontal wells.

10.13639/j.odpt.202303012