The hibernia oil field: integration of geophysical, geological, and production data into reservoir characterization and monitoring

摘要

The Hibernia oil field is located 315 kilometers (200 miles) southeast of St. John's, Newofundland, Canada in 80 meters of water. In is estimated to contain approximately 3 billion barrels of oil, of which 615 million barrles are currently condidered to be recoverable from two principal sandstone reservoirs (Hibernia and Ben Nevis/Avalon). Average daily production is expected to plateau at 135,000 BOPD and field life is anticipated to exceed 20years. The Hibernia reserori, the manin producing interal, is distinuished as a complexly faulted, compartimentalized fluvial-deltaic system. Geophysical, geological and production data have been criical to reservoir characterization efforts required for efficient reservoir management. Two 3D surveys, high-resolution vertical seismic profiles and dipole sonic data are some of the key geophysical data utilized in early characterization efforts. A strategically-targeted core proram and wire line acquisition of formation pressure data have also been crucial to reservoir management. Permanent down-hole gauges in oil producers provide real-time production information for model update and analysis. Rapid model updating is critical in operations and and key work process issue. A fifty-four failut 3D earth model of the Hibernia formation has been built. Seismic attributes and inversion results are used as constraints on the geostatistically-populated earth model. This model can be rapidly updated incorporating geological and petrophysical data from development wells. The updating of velocity information, oil-in-place mapping and fault seal analysis can also be performed rapidly. The model is used as input to a reservoir simulator to analyze multiple production scenarios and to identify key uncertainties. This paper will discuss how critical geophysical, geological and production data are incorporated into the reservoir characterization and model updating process.