Summary geology of the North Sea and broader region illustrating the principal reservoir and source systems, and showing the range of papers covered in this volume (figure adapted from Underhill 2011). Summary geology of the North Sea and broader region illustrating the principal reservoir and source systems, and showing the range of papers covered in this volume (figure adapted from Underhill 2011). The paper numbers on the right-hand side (8.1, 8.38 etc.) are the final digits of the paper's complete DOI. Click on these numbers to be directed to each paper. Bruce Levell, and Mike Bowman Petroleum Geology Conference series 2018;8:1-8 © 2018 The Author(s). Published by the Geological Society, London