石油地球物理勘探2024，Vol.59Issue(3)：484-493,10.DOI:10.13810/j.cnki.issn.1000-7201.2024.03.011
海上双方位地震资料OVT域联合成像技术在断层阴影区的应用
Application of OVT domain combined imaging technology of offshore two-azimuth seismic data in fault shadow areas
李黎 1刘道理 1郭飞 1张振波 1徐超 1吴成1
作者信息
- 1. 中海石油(中国)有限公司深圳分公司,广东深圳 518000
- 折叠
摘要
Abstract
The fault-controlled reservoirs are important targets of exploration and development.Structural imaging distortion is commonly present in seismic shadow areas caused by faults,and the conventional offshore narrow azimuth three-dimensional(3D)seismic data is difficult to satisfy the structural research under this back-ground.According to two-azimuth seismic streamer acquisition data in different years of typical fault-controlled reservoirs in the South China Sea,this paper analyzed the difference of 3D seismic data in different azimuths by velocity investigation.Based on the fused seismic gather data processed by prestack consistency and five-dimen-sional(5D)regularization,fault-controlled constrained grid tomography velocity modeling and tilted trans-versely isotropic(TTI)medium depth migration in the offset vector tile(OVT)domain were adopted,and high precision anisotropic velocity model was obtained.The actual seismic data processing results show that the data quality of the two-azimuth fusion in the depth domain is significantly improved,and the fault surface imaging accuracy is high.The seismic reflection energy is focused in the fault shadow areas,and the events are continuous.The structural distortion is basically eliminated,and the depth error with newly drilled well is greatly reduced.It provides a reliable basis for structural research and efficient oilfield development and offers a new idea for exploration of the same type of fault-controlled reservoirs in the region.关键词
断层阴影/双方位/OVT域/断控层析/各向异性/联合成像Key words
fault shadow/two-azimuth/OVT domain/fault-controlled tomography/anisotropy/combined imaging分类
天文与地球科学引用本文复制引用
李黎,刘道理,郭飞,张振波,徐超,吴成..海上双方位地震资料OVT域联合成像技术在断层阴影区的应用[J].石油地球物理勘探,2024,59(3):484-493,10.
