Seismic monitoring of CO2 injected into a marine acquifer
article
Since October 1996 Statoil has injected CO2 into a saline aquifer for disposal. Monitoring the behaviour of the CO2 in the sand formation and the sealing capacity of the overlying shale cap rock are key elements in understanding the dynamics of the injection process. A repeated 3D seismic dataset was therefore acquired in 1999, after injection of about 2 million metric tons of CO2. The time-lapse data show a large increase in reflectivity and a large push-down of reflections caused by the injected CO2. Gas at different levels within the sand are probably trapped by thin shale layers. Only a small part has reached the top of Utsira Fm., and no signs of CO2 are observed above the top seal. © 2000 Society of Exploration Geophysicists.
TNO Identifier
953519
ISSN
10523812
Source
SEG Technical Program Expanded Abstracts, 19(1), pp. 1623-1626.
Publisher
Society of Exploration Geophysicists
Pages
1623-1626
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