1. 3DLab, School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building Park Place, Cardiff CF10 3YE, UK (e-mail: richard.davies@earth.cf.ac.uk)
2. BP Azerbaijan, c/o Chertsey Road, Sunbury on Thames, Middlesex TW16 7LN, UK
3. ExxonMobil Exploration Company, 233 Benmar, Houston, Texas 77060, USA
4. BP, E & P Technology Group, Chertsey Road, Sunbury on Thames, Middlesex TW16 7LN, UK
5. Shell EP Technology Solutions, Shell International Exploration & Production Inc., 200 N Dairy Ashford, Houston, Texas 77079, USA
6. Consulting Reservoir Geophysicist, 1911 Country Brook Lane, Allen, Texas 75002, USA