28 well penetrations through the Middle to Upper Jurassic Pentland, Fulmar, Heather and Kimmeridge Clay Formations form the basis for this integrated regional chemostratigraphic, sedimentological, biostratigraphic and heavy minerals study. The wells encompass sections from the Puffin, Shearwater, Erskine, Kessog and Jade Fields. The study, carried out in association with Redrock Associates, provides high resolution chemostratigraphic correlations, detail facies, palaeoenvironmental and palaeogeographic evaluation and a revised sequence stratigraphic model.