Two types of SDR recognised in pre-stack velocity analysis of ultra-long-offset seismic reflection data in the South Atlantic

Jenny Collier1, Carl McDermott2, Lidia Lonergan3, Ken McDermott4 and Paul Bellingham4, (1)Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, (2)Imperial College London, London, United Kingdom, (3)Imperial College London, London, SW7, United Kingdom, (4)ION Geophysical, Chertsey, Surrey, United Kingdom