• Seismic imaging of subsurface geological structures by Kirchhoff’s migration based on extended Born approximation

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      https://www.ias.ac.in/article/fulltext/jess/129/0027

    • Keywords

       

      Asymptotic ray tracing method; Born approximation; forward modelling; Kirchhoff’s migration

    • 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.

    • Author Affiliations

       

      ALOK KUMAR ROUTA1 P R MOHANTY1

      1. Department of Applied Geophysics, Indian Institute of Technology (ISM), Dhanbad, Dhanbad, India.
    • Dates

       
  • Journal of Earth System Science | News

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