Variable-grid reverse-time migration of different seismic survey data
Sun Xiao-Dong1,2, Li Zhen-Chun1, and Jia Yan-Rui1
1. China University of Petroleum (East China), Qingdao 266580, China.
2. Laboratory for Marine Mineral Resource, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
Abstract With an increasing demand for high-resolution imaging of complex subsurface structures, thin layers and hidden reservoirs, borehole and cross-well seismic migration methods have become important. However, large differences are observed in the frequency bandwidth between the surface, borehole, and cross-well surveys. Thus, variable-grid-based algorithms have been adapted to reverse-time migration. Further, we introduce Lanczos filtering to ensure the stability of wavefield calculations as well as to decrease the artificial reflections that are caused due to the variable grid size. Finally, we observe that the application of this method to surface survey, borehole, and cross-well seismic data suggests improvements in the delineation of minor fractures and steeply dipping faults.
The research is supported by the National Natural Science Foundation of China (No. 41574098), National Key Research and Development Program (No. 2016YFC06011050), and National Oil and Gas Major Project (No. 2016ZX05006-002).
Cite this article:
. Variable-grid reverse-time migration of different seismic survey data[J]. APPLIED GEOPHYSICS, 2017, 14(4): 517-522.
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2017, Vol. 14 
