Petroleum Science >2021,??lssue 3:??- DOI: https://doi.org/10.1007/s12182-021-00557-y
Local events-based fast RTM surface-offset gathers via dip-guided interpolation Open?Access
文章信息
作者：Yang Zhao, Feng-Lin Niu, Lei Fu, Cheng Cheng, Jin-Hong Chen & Shou-Dong Huo
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Affiliations
Corresponding author
投稿時間：2021-3-30
引用方式：Zhao, Y., Niu, FL., Fu, L. et al. Local events-based fast RTM surface-offset gathers via dip-guided interpolation. Pet. Sci. (2021). https://doi.org/10.1007/s12182-021-00557-y
文章摘要
Reverse Time Migration (RTM) Surface Offset Gathers (SOGs) are demonstrated to deliver more superior residual dip information than ray-based approaches. It appears more powerful in complex geological settings, such as salt areas. Still, the computational cost of constructing RTM SOGs is a big challenge in applying it to 3D field data. To tackle this challenge, we propose a novel method using dips of local events as a guide for RTM gather interpolation. The residual-dip information of the SOGs is created by connecting local events from depth-domain to time-domain via ray tracing. The proposed method is validated by a synthetic experiment and a field example. It mitigates the computational cost by an order of magnitude while producing comparable results as fully computed RTM SOGs.
關鍵詞
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Surface-offset gathers ；Reverse-time migration ；Dip-guided interpolation ；Reduced costs ；Local-event raytracing