Compensating for visco-acoustic affects with an integrated model building flow: a deep water Equatorial Conjugate Margin case study

Cretaceous prospects in deep water Cute dIvoire data are impacted by later channel and canyon systems. The structural uncertainty and amplitude fidelity of the plays can be affected if unresolved shallow velocity and attenuation issues are not accommodated in the earth model. Using an integrated visco-acoustic model building flow we solve the impact of complex channel systems on deeper targets. Full Waveform Inversion (FWI) created an accurate and regional scale velocity model, removing the structural uncertainty when used in the imaging step. Tomography was used to compensate for visco-acoustic effects. Integrated into the sequence, the method calculated measures of log spectral ratio in demigrated space, mitigating stretch and tuning effects. The amalgamation of the complete visco-acoustic flow accommodated the structural complexity of the area, whilst improving the amplitude reliability of the dataset.