Abstract:

The shallow high-resolution seismic prospecting is one of the effective and reliable methods in urban active fault detection. For the shallowness of the object stratum, the tiny difference between the seismic attribute of strata and the ambient noise, it is hard to process and interpret seismic data. In this paper, the staggered-grid high-order difference method of one-order elastic wave equations, which are expressed with velocity and stress applying the flux-corrected transport(FCT) method with a perfectly matched layer (PML) absorbing boundary condition, are used to obtain the synthetic common-shot profile for shallow fault model. The simulated results of fault model show that this method is accurate and distinct. This seismic modeling method is helpful for approximately estimating the location, the depth and the scope of the fault from the synthetic profile during survey, and improving the efficiency of seismic prospecting and the precision and resolution of seismic data processing and interpretation.

Key words:  buried active fault, seismic prospecting, seismic modeling, finite-difference method