Latest time-lapse seismic data from Sleipner yield new insights into CO2 plume development

Chadwick, R. A.; Noy, D.J.; Arts, Rob; Eiken, Ola

doi:10.1016/j.egypro.2009.01.274

Cited by 145 publications

(90 citation statements)

References 2 publications

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“…Since the CO 2 plume has analogous characteristics to a thin bed, a number of approaches have been developed in order to estimate the thickness of the injected CO 2 plume from seismic surveys (Chadwick et al 2009;Sturton et al 2010;Arts & Eyvazi 2011). Arts et al (2004a), Chadwick et al (2004) and Ghaderi & Landrø (2009) utilized seismic amplitude and time shift to estimate the layer thickness of CO 2 at the Sleipner project site, but if phase and amplitude are not well preserved during the data processing errors may be large.…”

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.

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“…Extrapolating our best-fit power law to this lower Ra yields N u ≈ 10. However, other reservoirs [21] have significantly higher K with Ra ≈ 20, 000 and N u ≈ 80. At a reservoir depth of 50 m, the diffusive mixing lifetime of t d ≈ 16, 000 years is reduced by convective processes to approximately 200 years.…”

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Convective Instability and Mass Transport of Diffusion Layers in a Hele-Shaw Geometry

2011

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We consider experimentally the instability and mass transport of a porous-medium flow in a Hele-Shaw geometry. In an initially stable configuration, a lighter fluid (water) is located over a heavier fluid (propylene glycol). The fluids mix via diffusion with some regions of the resulting mixture being heavier than either pure fluid. Density-driven convection occurs with downward penetrating dense fingers that transport mass much more effectively than diffusion alone. We investigate the initial instability and the quasi steady state. The convective time and velocity scales, finger width, wave number selection, and normalized mass transport are determined for 6, 000 < Ra < 90, 000. The results have important implications for determining the time scales and rates of dissolution trapping of carbon dioxide in brine aquifers proposed as possible geologic repositories for sequestering carbon dioxide.

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“…Seismic survey is the most effective method that has been implemented in the well-known world's largest CO 2 storage project in the Norwegian North Sea (Sleipner) for monitoring injected CO 2 plume. This method enables observation from the surface of the formation and migrating of CO 2 , injected into the storage site, under impermeable layers (Chadwick et al, 2009;Hermanrud et al, 2009;Alnes et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

Shogenov¹,

Shogenova²,

Vizika-Kavvadias³

2013

Bull Geol Soc Finland

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This study is focused on two structures in the Baltic offshore region (E6 and E7 structures in Latvia) prospective for the geological storage of carbon dioxide (CO 2 ). Their CO 2 storage capacities were estimated recently with different levels of reliability. Petrophysical, geophysical, mineralogical and geochemical parameters of reservoir rocks represented by quartz sandstones of the Deimena Formation of Middle Cambrian in two wells and properties of Silurian and Ordovician cap rocks were additionally studied and interpreted in the present contribution. Extended methodology on rock measurements and estimation of conservative and optimistic storage capacity are presented. Uncertainties and risks of CO 2 storage in the offshore structure E6 estimated as the most prospective for CO 2 geological storage in the Baltic Region, and the largest among all onshore and offshore structures studied in Latvia, were discussed. We re-estimated the previous optimistic capacity of the E6 structure (265-630 Mt) to 251-602 Mt. Considering fault system within the E6 structure we estimated capacity of two compartments of the reservoir separately (E6-A and E6-B). Estimated by the optimistic approach CO 2 storage capacity of the E6-A part was 243-582 Mt (mean 365 Mt) and E6-B part 8-20 Mt (mean 12 Mt). Conservative capacity was 97-233 Mt (mean 146 Mt) in the E6-A, and 4-10 Mt (mean 6 Mt) in the E6-B. The conservative average capacity of the E6-B part was in the same range as this capacity in the E7 structure (6 and 7 Mt respectively). The total capacity of the two structures E6 and E7, estimated using the optimistic approach was on average 411 Mt, and using the conservative approach, 159 Mt.

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Latest time-lapse seismic data from Sleipner yield new insights into CO2 plume development

Cited by 145 publications

References 2 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

Convective Instability and Mass Transport of Diffusion Layers in a Hele-Shaw Geometry

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

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Latest time-lapse seismic data from Sleipner yield new insights into CO2 plume development

Cited by 145 publications

References 2 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

Convective Instability and Mass Transport of Diffusion Layers in a Hele-Shaw Geometry

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

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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