edited by D.W.J. Bosence, Royal Holloway, University of London, UK, K.A. Gibbons, Nexen Petroleum UK Ltd, UK, D.P. Le Heron, Royal Holloway University of London, UK, W.A. Morgan, Morgan Geoscience Consulting, LLC, USA, T. Pritchard, BG Group, UK, and B.A. Vining, Royal Holloway University of London, UK