Acoustic FWI applied to subsalt imaging: An illuminating case study from offshore Angola

• DOI: 10.1190/segam2016-13964890.1
• Publication Date: 2016-09-06T20:03:02Z
• Authors: Paul Williamson; Christian Rivera; Khalid Mansoor
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

The success of depth imaging projects ultimately depends on the quality velocity model, which salt geometry is generally thought to be key component in subsalt studies. Standard workflows have therefore been built define this geometry, are implicitly based around simplifying, but apparently widely pertinent assumption that a known constant. Full Waveform Inversion has proved powerful recent addition seismic model-building technology. However, its use tectonic contexts limited. In paper we present an application study using broadband wide-azimuth data: expected benefits refining sediment velocities, results help redefine some salt-body geometries and challenge original region pure halite and, indeed, it While they supported by qualitative uplift image, full validating these preliminary conclusions subject ongoing work. Presentation Date: Monday, October 17, 2016 Start Time: 2:15:00 PM Location: 163/165 Type: ORAL