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AKE: Energie
AKE 4: CO2-Entsorgung und Energieeffizienz
AKE 4.1: Hauptvortrag
Freitag, 28. März 2003, 11:00–11:45, F 428
CO2 - store it in the underground or use it commercially? — •Tore A. Torp — Statoil Research Centre, Rotvoll, N-7005 Trondheim, Norway
At the Sleipner gas field in the North Sea, CO2 has been stripped from the produced natural gas and injected into an overlying aquifer since October 1996. During that time, nearly 6 million tonnes of CO2 have been injected without significant operational problems. The Sleipner project is the first commercial application of CO2 storage in deep saline aquifers in the world. To monitor the injected CO2, a separate EU supported project, Saline Aquifer CO2 Storage (SACS), was established in 1998. Recently the third stage, studying the long term behaviour of CO2 at Sleipner and making a feasibility study of 4 possible other storage sites in NO, DK, UK and GE, has started.
The CO2 at Sleipner is injected into a large high permeability sand body (between 850 and 1500m deep, occupying 2.5 x 104km2) which is overlain by a thick shale succession. Shales have very low permeability and are expected to provide an effective seal to the injected CO2. As concluded by the 6 European geo-science institutes involved in SACS, there is every reason to expect the CO2 to stay there the next few thousand years.
Simulation tools adapted to describe the migration of the CO2 in the reservoir have shown themselves capable of replicating the position of the CO2 and can, therefore, be used to simulate its future behavior.
The cumulative experiences of the Sleipner and SACS projects has been embodied in a No-dqBest Practice ManualNo-dq to assist other organisations planning CO2 injection projects of this type.
The Kyoto protocol and the EU Directive on emission trading will, from 2005, put a price on CO2 emissions. At the same time the oil and gas industry in the North Sea is coming to a development phase where by using CO2 they can extract 5 - 10 times more oil. This creates a market for CO2.
The presentation will finish with an indication of the economical challenge to get CO2 from heavy industry and power stations on land to the off-shore oil fields.