Seismic Reflectivity in Carbon Dioxide Accumulations: A Review

Ravazzoli, Claudia L.; Gómez, Julián L.

doi:10.5772/57087

Cited by 1 publication

(1 citation statement)

References 42 publications

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“…The thickness can be determined based on the relationship between the tuning frequency and temporal thickness using spectral decomposition. Several spectral decomposition methods, such as the continuous wavelet transform (CWT) and the Wigner-Ville distribution, have been applied to CO 2 storage sites to qualitatively and quantitatively assess the injected CO 2 (Chadwick et al 2010;Ravazzoli & Gómez 2014). White et al (2013) used the smoothed pseudo Wigner-Ville distribution (SPWVD) to analyse the topmost supercritical CO 2 layer at the Sleipner gas field.…”

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany

Huang

Juhlin

Han³

et al. 2016

Geophys. J. Int.

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S U M M A R YDetermining thin layer thickness is very important for reservoir characterization and CO 2 quantification. Given its high time-frequency resolution and robustness, the complex spectral decomposition method was applied on time-lapse 3-D seismic data from the Ketzin pilot site for CO 2 storage to evaluate the frequency-dependent characteristics of thin layers at the injection level. Higher temporal resolution and more stratigraphic details are seen in the all-frequency and monochromatic reflectivity amplitude sections obtained by complex spectral decomposition compared to the stacked sections. The mapped geologic discontinuities within the reservoir are consistent with the preferred orientation of CO 2 propagation. Tuning frequency mapping shows the thicknesses of the reservoir sandstone and gaseous CO 2 is consistent with the measured thickness of the sandstone unit from well logging. An attempt to discriminate between pressure effects and CO 2 saturation using the extracted tuning frequency indicates that CO 2 saturation is the main contributor to the amplitude anomaly at the Ketzin site. On the basis of determined thickness of gaseous CO 2 in the reservoir, quantitative analysis of the amount of CO 2 was performed and shows a discrepancy between the injected and calculated CO 2 mass. This may be explained by several uncertainties, like structural reservoir heterogeneity, a limited understanding of the complex subsurface conditions, error of determined tuning frequency, the presence of ambient noise and ongoing CO 2 dissolution.

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Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany

Huang

Juhlin

Han³

et al. 2016

Geophys. J. Int.

View full text Add to dashboard Cite

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Seismic Reflectivity in Carbon Dioxide Accumulations: A Review

Cited by 1 publication

References 42 publications

Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany

Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany

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Seismic Reflectivity in Carbon Dioxide Accumulations: A Review

Cited by 1 publication

References 42 publications

Quantitative evaluation of thin-layer thickness and CO2mass utilizing seismic complex decomposition at the Ketzin CO2storage site, Germany

Quantitative evaluation of thin-layer thickness and CO2mass utilizing seismic complex decomposition at the Ketzin CO2storage site, Germany

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Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany

Quantitative evaluation of thin-layer thickness and CO₂mass utilizing seismic complex decomposition at the Ketzin CO₂storage site, Germany