Full waveform inversion in the time lapse mode applied to CO2 storage at Sleipner. (2nd May 2012)

• Record Type: Journal Article
• Authors: Queißer, Manuel; Singh, Satish C.
• Is Part Of: Geophysical prospecting. Volume 61:Number 3(2013:May)
• Page Start: 537
• Page End: 555
• Publication Date: 2012-05-02
• Subjects: Prospecting -- Geophysical methods -- Periodicals; 622.15
• DOI: 10.1111/j.1365-2478.2012.01072.x
• Languages: English
• ISSNs: 0016-8025

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>ABSTRACT</title> <p>Carbon capture and storage is a viable greenhouse gas mitigation technology and the Sleipner CO₂ sequestration site in the North Sea is an excellent example. Storage of CO₂ at the Sleipner site requires monitoring over large areas, which can successfully be accomplished with time lapse seismic imaging. One of the main goals of CO₂ storage monitoring is to be able to estimate the volume of the stored CO₂ in the reservoir. This requires a parametrization of the subsurface as exact as possible. Here we use elastic 2D time‐domain full waveform inversion in a time lapse manner to obtain a P‐wave velocity constrain directly in the depth domain for a base line survey in 1994 and two post‐injection surveys in 1999 and 2006. By relating velocity change to free CO₂ saturation, using a rock physics model, we find that at the considered location the aquifer may have been fully saturated in some places in 1999 and 2006.</p> </abstract>