摘要
涪陵页岩气田晚奥陶世五峰组—早志留世龙马溪组(O3w-S1l)页岩气层经过多期构造运动改造,地层变形强烈,断裂、褶皱发育,地层产状变化剧烈,给页岩气水平井导向带来了极大挑战。为保证水平井轨迹在优质页岩气层中穿行,提出了基于导向模型实时修正的水平井地震地质导向技术。在区域地质特征研究的基础上,以地震剖面为初始导向模型,综合钻井、录井、测井等多种数据信息,开展标志层特征分析、实时小层精细对比和速度场实时更新,建立了靶点深度和地层产状的预测方法,保证了精准入靶,形成了水平井井眼轨迹实时跟踪调整技术,确保了水平井井眼轨迹在优质页岩气层中穿行。实践证明,水平井地震地质导向技术有效指导了水平井钻井,为涪陵页岩气田的高效开发提供了技术保障。
Owing to multistage tectonic movements, shale gas reservoir O3W-S1l in the Fuling shale gas field has been highly deformed, and fractures and folds have developed. The seismic geo-steering drilling technology for horizontal wells encounters challenges owing to substantial change in the occurrence of this formation. To increase the rate at which high-quality shale formations are encountered during drilling, the seismic geo-steering drilling technology for horizontal wells based on a real-time correction model is presented. First ,based on regional geological feature analysis, characteristics of the guiding bed were analyzed,and a real-time fine substratum correlation was conducted. Second,by taking the seismic section as the initial geo-steering model,with comprehensive use of drilling and well logging, the velocity field was updated in real time. Then, the target depth and formation occurence were predicted, and a real-time trajectory tracking and adjustment technique for horizontal wells was established, ensuring the trajectory of horizontal wells passing through high-quality shale gas reservoirs. The practice indicated that the seismic geosteering technology guided the drilling of horizontal wells in the Fuling shale gas field effectively.
作者
查树贵
刘利平
廖朋
吴娜珠
崔志恒
周从业
ZHA Shugui;LIU Liping;LIAO Peng;WU Nazhu;CUI Zhiheng;ZHOU Congye(Jianghan Oilfield Branch,SINOPEC,Wuhan 430035,China;Yangtze Normal University,Chongqing 408100,China;Fuling Shale Gas Exploration ＆ Development Corpration,SINOPEC,Chongqing 408100,China)
出处
《石油物探》
EI
CSCD
北大核心
2018年第3期369-377,共9页
Geophysical Prospecting For Petroleum
基金
国家科技重大专项"涪陵页岩气开发示范工程"(2016ZX05060)资助~~
关键词
页岩气
地震地质导向
水平井
靶点调整
轨迹跟踪
邻井误差
变速成图
shale gas
seismic geo-steering
horizontal well
target adjustment
trajectory tracking
adjacent wells error
variable velocity mapping
