22 well penetrations through the Smith Bank and Skagerrak formations form the basis for this regional chemostratigraphic and sedimentological study. The wells extend from Judy in the south through Kessog and Herron, finishing north of Marnock. The study, carried out in association with Redrock Associates, provides high resolution chemostratigraphic correlations, detailed facies, palaeoenvironmental and palaeogeographic evaluation and a revised sequence stratigraphic model.