Hibernia oil field is 200 miles southeast of St. John＇s, Newfoundland, Canada, in 262 ft of water. Estimated initial oil in place is 3 billion bbl, of which 615 million bbl are considered recoverable from two principal sandstone reservoirs (Hibernia and pen Nevis/Avalon), The Hibernia reservoir, the main producing interval, is a complexly faulted, compartmentalized, fluvial-deltaic system. Geophysical, geological, and production data are critic al in reservoir-characterization efforts required for efficient reservoir management. A 54-fault 3D earth model of the Hibernia formation was built. Incorporation of key geophysical, geological, and production data is critical to effective reservoir characterization and management. Reservoir characterization focused on the Hibernia reservoir during ramp-up to full production. Detailed reservoir models and simulations are constantly updated as new development-drilling data become available.