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Using Full-waveform Inversion to Build Model from Shallow to Deep: A Case Study in Black Sea

Summary Full Wave Inversion (FWI) has been successfully applied in the oil and gas industry as a high-end tool for high-resolution and complex model building. Conventional FWI commonly utilizes diving and refracted waves to update the low-wavenumber background components of the model, however, the update is usually depth limited by the acquisition offset. We present a case study from the Black Sea Khan Kubrat area to demonstrate an optimized workflow using conventional FWI followed by reflection-based FWI to update the velocity model from shallow to deep.