1. Nederlandse Aardolie Maatschappij (NAM), PO Box 28000, 9400 HH Assen, The Netherlands
2. Geological Institute, Energy & Mineral Resources Group (EMR), RWTH Aachen University, Wuellnerstraße 2, 5206 Aachen, Germany
3. Getech UK, Kitson House, Elmete Hall, Elmete Lane, Leeds LS8 2LJ, UK
4. Shell UK Exploration & Production, 1 Altens Farm Road, Nigg, Aberdeen AB12 3FY, UK
5. TNO (Geological Survey of the Netherlands), PO Box 80015, NL-3508 TA Utrecht, The Netherlands
6. Argo Geological Consultants, Bachlaan 46, 3706 BD Zeist, The Netherlands
7. EBN B.V., Daalsesingel 1, 3511 SV Utrecht, The Netherlands