Dr. Jiajie (Jeff) Chen ( 陈家杰 ): Advanced Senior Geologist at Marathon Oil Company since 2001. He worked for Core Lab (1997-2001) and Amoco Production Company (1993-1997). Jeff obtained his B.S. and M.S. from ZhongshanUniversity in 1981 and 1984, respectively, and served as an assistant professor there from 1984 to 1988. He obtained his PhD from Brown University in 1994. In his technical career, he has conducted research and reservoir studies covering various play types and depositional settings, and for different areas including USA, Canada, Mexico, Russia, Venezuela, Colombia, Angola, Gabon, Saudi Arabia, and United Arabia Emirates. His areas of expertise include: carbonate isotope geochemistry, paleoceanography, sequence stratigraphy, paleoclimatology, structural geology, neotectonics, basin analysis, fracture characterization, depositional faciesmodeling, reservoir characterization and integrated reservoir modeling.