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High Resolution Model Building and Broadband Imaging in Deep Water Offshore Angola
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
With increased interest in pre-salt hydrocarbon exploration in Kwanza Basin offshore Angola, reliable and accurate information from surface seismic data is critical to successful imaging. This area, however, presents many challenges to the geophysicist, being characterized by complex salt geometry, high velocity carbonate layers, a faulted tertiary section and limited well control. In such an environment the desired seismic would have long offsets, rich azimuthal coverage and be broadband by design. Using the latest data-processing techniques, including deghosting and high-resolution model building, a combination of reflection tomography and full-waveform inversion (FWI) we add significant value to existing, conventionally acquired, narrow-azimuth datasets, ultimately leading to improved imaging and interpretation confidence in pre-salt structures.