Abstract
Complex seismic signatures are generated because of the multifaceted nature of the subsurface. These features make the interpretation very complex. To understand the seismic behaviour, different numerical tools are available. In this present study, an attempt has been made to demonstrate both the modelling and imaging aspects of these complex subsurface features commonly encountered in petroleum exploration. The present work is an extended form of the Born approximation by using Green’s function based asymptotic ray theory. Subsequently, Kirchhoff’s depth migration has been applied to generate seismic shot gathers over structural as well as stratigraphic traps. From this analysis, it is observed that the technique is able to efficiently migrate both the structural and stratigraphic traps. The proposed technique also intends to handle strong velocity variation and amplitude restoration. However, some noise in terms of over-critical reflection has been observed in the depth migrated section corresponding to pinch-out and unconformity respectively.
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Acknowledgements
The authors would like to thank the Department of Science and Technology (DST) Inspire Division, Govt. of India for the financial support through the Sanction No. DST/Inspire Fellowship/03/2014/IF140888. The authors also thank the reviewers and the editor for their constructive suggestions and comments, which improved the manuscript a lot.
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Communicated by N V Chalapathi Rao
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Routa, A.K., Mohanty, P.R. Seismic imaging of subsurface geological structures by Kirchhoff’s migration based on extended Born approximation. J Earth Syst Sci 129, 27 (2020). https://doi.org/10.1007/s12040-019-1275-6
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DOI: https://doi.org/10.1007/s12040-019-1275-6