Detection and understanding of natural CO2 releases in KwaZulu- Natal, South Africa

Gareth Johnson, Nigel Hicks, Clare E Bond, Stuart Gilfillan, David Jones, Yannick Kremer, Robert Lister, M Nkwane, T Maupa, P Munyangane, Kate Robey, Jonathan Pearce, Zoe K Shipton, Stuart R. Haszeldine

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Abstract

Natural carbon dioxide (CO2) emanates from a number of sites along a N-S trend that coincides with a mapped fault near the village of Bongwana in KwaZulu-Natal, South Africa. In addition to the natural CO2 seeps a groundwater well drilled on a farm in Bongwana encountered CO2 and now leaks. Thus the Bongwana sites provide excellent analogues for failed CO2 storage under the two primary leakage scenarios; 1) abrupt leakage through injection well failure or leakage up an abandoned well, and 2) gradual leakage, through undetected faults, fractures or wells. Here we present results from preliminary fieldwork undertaken in September 2015.
Original languageEnglish
Pages (from-to)3757-3763
Number of pages7
JournalEnergy Procedia
Volume114
Early online date2017
DOIs
Publication statusPublished - Jul 2017
Event13th International Conference on Greenhouse Gas Control Technologies, GHGT-13 - Lausanne, Switzerland
Duration: 14 Nov 201618 Nov 2016

Keywords

  • CO2 storage
  • Natural Leakage
  • South Africa
  • Geological CO2 storage
  • Water quality

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    Johnson, G., Hicks, N., Bond, C. E., Gilfillan, S., Jones, D., Kremer, Y., Lister, R., Nkwane, M., Maupa, T., Munyangane, P., Robey, K., Pearce, J., Shipton, Z. K., & Haszeldine, S. R. (2017). Detection and understanding of natural CO2 releases in KwaZulu- Natal, South Africa. Energy Procedia, 114, 3757-3763. https://doi.org/10.1016/j.egypro.2017.03.1505