Passive Source Illumination Compensation Based Full Waveform Inversion

The high velocity structures always produce shielding effect to the low velocity structures below them in conventional full waveform inversion (FWI), which leads to few reflected information recorded on surface corresponding to those low velocity structures. The insufficient illumination will influence the final results of FWI, especially on deep structures. Here we consider compensating the insufficient illumination of active seismic sources using passive seismic sources. Based on conventional FWI, we introduce the constraint with passive seismic data, and propose a strategy for passive source illumination compensation based FWI. Firstly, we discuss the relationship between the accuracy of velocity model and the estimation of source locations and wavelets. Then we provide the workflow of this strategy. Numerical example shows this illumination compensation strategy can provide more detailed deep information.