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University of Texas – Austin

1. Akhbari, Daria. Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS).

Degree: Geological Sciences, 2018, University of Texas – Austin

Geological carbon storage (GCS) has the potential to reduce anthropogenic CO₂ emissions, if large volumes can be injected. Storage capacity is limited by regional pressure build-up in the subsurface. However, natural CO₂ reservoirs are commonly under-pressured, suggesting that natural processes counteract the pressure build-up and increase storage security. To identifythese processes, I studied Bravo Dome natural CO₂ reservoir, where the gas pressure are significantly below hydrostatic pressure. Here, I showed that the dissolution of CO₂ into the brine contributes to observed under-pressure conditions because Bravo Dome appears to be isolated from the ambient hydrologic system. This study indicated that the pressure drop in the gas due to CO₂ dissolution slows down convective dissolution dramatically. I present 2D numerical simulations and reproduce the observed reservoir pressures and noble gas compositions. Based on this study, CO₂ at Bravo Dome must at least persist for 300 ka to produce the observed noble gas composition and reservoir pressures. Lastly, I showed that compartmental gas pressure observed at Bravo Dome are controlled by capillary forces. Advisors/Committee Members: Hesse, Marc (advisor), Breecker, Daniel (committee member), Flemings, Peter (committee member), Larson, Toti (committee member), DiCarlo, David (committee member).

Subjects/Keywords: CO2; CO₂; Under-pressure condition; Capillary pressure; Abnormal pressure; Geological CO2 storage; Geological CO₂ storage; Reservoir compartmentalization; Convective dissolution

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Akhbari, D. (2018). Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS). (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/68751

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Akhbari, Daria. “Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS).” 2018. Thesis, University of Texas – Austin. Accessed October 19, 2018. http://hdl.handle.net/2152/68751.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Akhbari, Daria. “Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS).” 2018. Web. 19 Oct 2018.

Vancouver:

Akhbari D. Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS). [Internet] [Thesis]. University of Texas – Austin; 2018. [cited 2018 Oct 19]. Available from: http://hdl.handle.net/2152/68751.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Akhbari D. Under-pressure in the Bravo Dome natural CO₂ field and its implications for geological CO₂ storage (GCS). [Thesis]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/68751

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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