AES3820. This course gives an overview of the conditions that are necessary for oil and gas to accumulate in reservoirs. This is first illustrated in concepts and then in a few relevant case studies. The life of a reservoir is discussed from initial basin studies to exploration, appraisal development and finally abandonment. The task of the petroleum geologist during these various phases is illustrated, as well as his interaction with other disciplines such as reservoir engineering, geophysics, and petrophysics. Material on hand includes among others cores, logs and seismic lines.