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Major CO2 blowouts from offshore wells are strongly attenuated in water deeper than 50 m

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  • Curtis M. Oldenburg
  • Lehua Pan

Abstract

Growing interest in offshore geologic carbon sequestration (GCS) motivates evaluation of the consequences of subsea CO2 well blowouts. We have simulated a hypothetical major CO2 well blowout in shallow water of the Texas Gulf Coast. We use a coupled reservoir‐well model (T2Well) to simulate the subsea blowout flow rate for input to an integral model (TAMOC) for modeling CO2 transport in the water column. Bubble sizes are estimated for the blowout scenario for input to TAMOC. Results suggest that a major CO2 blowout in ≥50 m of water will be almost entirely attenuated by the water column due to CO2 dissolution into seawater during upward rise. In contrast, the same blowout in 10 m of water will hardly be attenuated at all. Results also show that the size of the orifice of the leak strongly controls the CO2 blowout rate. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

Suggested Citation

  • Curtis M. Oldenburg & Lehua Pan, 2020. "Major CO2 blowouts from offshore wells are strongly attenuated in water deeper than 50 m," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(1), pages 15-31, February.
    • Handle: RePEc:wly:greenh:v:10:y:2020:i:1:p:15-31
    DOI: 10.1002/ghg.1943
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    Cited by:

    1. Curtis M. Oldenburg & Yingqi Zhang, 2022. "Downwind dispersion of CO2 from a major subsea blowout in shallow offshore waters," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 12(2), pages 321-331, April.

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