套管
变形(气象学)
地质学
石油工程
变形监测
井身刺激
井筒
油页岩
四川盆地
天然气田
岩土工程
工程类
天然气
石油
水库工程
古生物学
海洋学
地球化学
废物管理
作者
Bo Zeng,Nayun Zhou,Xingwu Guo,Yi‐Ting Wang,Yunlong Fu,Guan Wang,Roman Korkin,Andrey Fedorov,Alexey Borisenko,Yin Luo,Haoyan Li,Jie Zhang
摘要
Abstract Due to the reservoir complexity that includes natural fractures and weak bedding planes, over 30% of China shale gas wells in Sichuan Basin encountered casing deformation issues. Casing deformation resulted in huge challenges for wellbore accessibility and prevented setting of bridge plugs of the subsequent stages at the originally designed depth. To avoid leaving the target lateral unstimulated after casing deformation incidents, operators would have to perforate the entire remaining lateral and conduct multiple fracturing treatments with diversions; however, high uncertainty in such practice risks under-stimulation or overstimulation. In this study, we share several field cases that utilized high-frequency pressure monitoring (HFPM) to evaluate and improve stimulation effectiveness in wells with casing deformation. The detailed operational procedure and initial findings from comparison between HFPM diagnosis and results from other monitoring techniques, such as seismic monitoring and downhole camera, are also discussed. Observations, limitations, and potential improvements from these cases demonstrate a potentially duplicatable practice for stimulation in wells with casing deformation.
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