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Seismic Wave Simulation and Imaging of an Inversion Structure Model

DONG Liang-guo, ZHOU Zu-yi   

  1. MOE Laboratory of Marine Geology, Tongji Universitym Shanghai 200092, China
  • Received:2001-06-20 Revised:2001-06-20 Online:2001-06-20 Published:2001-06-20

Abstract: Tectonic inversion could usually result in the complication of structure styles in that either pre-existing faults are reactivated or new reverse faults formed during the inversion stage. Correct seismic interpretation of inversion structures is fundamental for the study of inversion tectonics. The validity of seismic interpretation in inversed basins is related to the origina1 available data and the appropriate processing methods. In this study, we used the pop-upstructure as an inversion structure model for the seismic wave simulation and imaging High-order difference method was applied to reduce the numerical dispersion and a new kind of absorbing boundary condition was adopted in the simulation Mid-point shot was used in the simulation with a total of 185 shots recorded Depth-migration imaging was then applied on the zero-offset profile to achieve a high quality seismic profile that is comparable to the original model The simulation and imaging results demonstrated that high-order difference method is an effective approach for the simulation of seismic wave propagation in complicated structures. With proper imaging methods,such as Fourier finite difference method, most inversed structures can be recognized from seismic profiles.