SEGJ Technical Conference

Waveform-based estimation of velocity heterogeneity for prestack imaging from broadband seismic reflection data

Abstract Deep seismic reflection profiling across the area of land-marine transition zones in Japan has been imposed a number of restrictions and compromises on enhanced seismic imaging with broadband processing. In our study, multilateral approach beyond the conventional CMP stack is applied to the multi-scale, multi-mode seismic data for the extraction of deep reflection patterns. In order to build high-resolution velocity structure, we developed a processing workflow based on the hybrid approach of reflection velocity analysis and turning-ray tomography followed by full-waveform inversion. We evaluated the relation between reconstructed velocity heterogeneity and reliable low-frequency component using both synthetic seismograms and typical multi-scale deep reflection data acquired in the northeast Japan.