1. Department Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
2. Nexen Petroleum UK Ltd., Prospect House, 97 Oxford Road, Uxbridge, Middlesex, UB8 1LU, UK
3. Morgan Geoscience Consulting LLC, 132 W. Ellendale Estates Drive, Houma, LA 70360, USA
4. bg Group, 100 Thames Valley Park Drive, Reading, Berkshire, RG6 1PT, UK
5. Baker Hughes, Bentley Hall, Alton, Hampshire, GU34 4PU, UK