Financial support from Nederlandsche Aardolie Maatschappij (NAM) and Petroleum Development Oman (PDO) is gratefully acknowledged. The authors especially wish to thank Jurry van Doorn, Arie Vliegenthart, Ted Ter Burg, and Joachim Strobel (Schlumberger Wireline and Testing, The Hague, Netherlands) for the subsurface data acquisition and processing. The authors are grateful to AAPG reviewer Alison Mabillard for the constructive comments. Margarita Cuevas Gozalo is thanked for the core analysis and the discussions on log correlation and depositional model. Core analysis was performed at PanTerra Geoconsultants. Djin Nio (Enres International) kindly provided the CycloLog log analysis software. Kees Geel and Max Peeters are thanked for their contribution to the depositional model, Stefan Luthi for sharing his expertise on borehole image analysis with us, and Irina Overeem for the discussions in the field. Albert Kettner kindly prepared the Digital Elevation Model (DEM). Mieke Kosters, Clemens Visser, and nine groups of M.Sc. students have, in the period of 1998–2006, assisted with the data collection. Logistic support by Anne-Mieke Havermans and Jesus Laliena is acknowledged.