Seismic Imaging of Sequestered Carbon Dioxide

Time-lapse, three-dimensional seismic surveys have imaged an accumulation of injected CO 2 at the Sleipner field, in the North Sea basin. The changing pattern of reflectivity suggests\ud that CO 2 accumulates within a series of interbedded sandstones and mudstones beneath a thick caprock of mudstone. Nine reflective horizons within the reservoir have been mapped\ud on six surveys acquired between 1999 and 2008