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Preparatory Work for the Seismic Monitoring of CO2 Storage at a Prospective Site in the St. Lawrence Lowlands, Canada.

Perozzi, Lorenzo; Giroux, Bernard; Kofman, Randolf S.; Schmitt, Douglas R. (2014). Preparatory Work for the Seismic Monitoring of CO2 Storage at a Prospective Site in the St. Lawrence Lowlands, Canada. In: 76th EAGE Conference and Exhibition 2014 / 76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - SPE EUROPEC 2014, 16-19 juin 2014, Amsterdam, Pays-Bas.

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Résumé

The success of the geological storage of CO2 depends on the capability to monitor movements of the injected fluid into the subsurface. For understanding the effects of CO2 as a pore fluid on the overall rock seismic response, a series of ultrasonic measurements on two samples of saline aquifer sandstones of the Potsdam Group have been made showing clear P-wave variations with CO2 varying phase state. Significant amplitude variation was only observed in the Covey Hill sample. The laboratory measurements and well log data were used to calibrate a numerical model that was used to perform poro-viscoelastic forward modeling of time-lapse walkaway VSP surveys. The results show that supercritical CO2 injected in the reservoir, results in a clear seismic signature. Finally, the modeling results also indicate that the possibility to rely on AVO analysis to monitor the CO2 plume is compromised by a refracted wave that appear early in the wave field.

Type de document: Document issu d'une conférence ou d'un atelier
Mots-clés libres: aquifers; digital storage; petroleum reservoir evaluation; seismic prospecting; seismology; water injection; well logging
Centre: Centre Eau Terre Environnement
Date de dépôt: 10 mai 2018 16:08
Dernière modification: 10 mai 2018 16:08
URI: http://espace.inrs.ca/id/eprint/3782

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