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dc.contributor.authorYang, C.
dc.contributor.authorKazemeini, S.
dc.contributor.authorFan, W.
dc.contributor.authorJuhlin, Christopher
dc.contributor.authorLiu, D.
dc.date.accessioned2017-01-30T11:54:21Z
dc.date.available2017-01-30T11:54:21Z
dc.date.created2015-10-29T04:10:04Z
dc.date.issued2011
dc.identifier.citationYang, C. and Kazemeini, S. and Fan, W. and Juhlin, C. and Liu, D. 2011. Amplitude variation with offset responses modeling study of walkaway vertical seismic profile data at C02 geological storage site, Ketzin, Germany. Acta Geologica Sinica. 85 (5): pp. 1118-1126.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/16188
dc.identifier.doi10.1111/j.1755-6724.2011.00544.x
dc.description.abstract

An important component of any CO2 sequestration project is seismic monitoring for tracking changes in subsurface physical properties, such as velocity and density. Different reservoirs have different amplitude variation with offset (AVO) responses, which can define underground conditions. In the present paper we investigate walkaway vertical seismic profile (VSP) AVO response to CO2 injection at the Ketzin site, the first European onshore CO2 sequestration pilot study dealing with research on geological storage of CO2. First, we performed rock physics analysis to evaluate the effect of injected CO2 on seismic velocity using the Biot-Gassmann equation. On the basis of this model, the seismic response for different CO2 injection saturation was studied using ray tracing modeling. We then created synthetic walkaway VSP data, which we then processed. In contrast, synthetic seismic traces were created from borehole data. Finally, we found that the amplitude of CO2 injected sand layer with different gas saturations were increased with the offset when compared with the original brine target layer. This is the typical class III AVO anomaly for gas sand layer. The AVO responses matched the synthetic seismic traces very well. Therefore, walkaway VSP AVO response can monitor CO2 distribution in the Ketzin area.

dc.publisherWiley-Blackwell Publishing Asia
dc.titleAmplitude variation with offset responses modeling study of walkaway vertical seismic profile data at C02 geological storage site
dc.typeJournal Article
dcterms.source.volume85
dcterms.source.number5
dcterms.source.startPage1118
dcterms.source.endPage1126
dcterms.source.issn1000-9515
dcterms.source.titleActa Geologica Sinica
curtin.departmentDepartment of Exploration Geophysics
curtin.accessStatusFulltext not available


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