Fault seal analysis of a natural CO2 reservoir

J. Miocic, G. Johnson, S. M V Gilfillan, C. I. McDermott, R. S. Haszeldine

Research output: Contribution to conferencePaper

Abstract

For potential CO2 storage sites it is crucial to know if faults will act as flow baffles or if CO2 will be able to migrate out of the reservoir complex. Geomechanical fault seal analysis for a CO2 reservoirs is very similar to hydrocarbon reservoirs. However, fault rock seals have the potential to act very different in a CO2-rock-water system compared to a hydrocarbon-rock-water system. Natural CO2 reservoirs are common in sedimentary basins world-wide and here we present the results of a fault seal analysis, with emphasis on juxtaposition and fault rock seals, of a natural CO2 reservoir from the Colorado Plateau. The reservoir has leaked CO2 for more than 350 ka along faults. Our results show that the existing gas column can overcome the capillary entry pressure of the fault rocks, leading to migration of CO2 to the surface. Additionally, the fault is orientated favourable for reactivation in the current stress field.
LanguageEnglish
Pages155-159
Number of pages5
Publication statusPublished - 24 Sep 2015
Event4th International Conference on Fault and Top Seals 2015 : Art or Science - Almeria, Spain
Duration: 20 Sep 201524 Sep 2015

Conference

Conference4th International Conference on Fault and Top Seals 2015 : Art or Science
CountrySpain
CityAlmeria
Period20/09/1524/09/15

Fingerprint

Seals
Rocks
Hydrocarbons
rock
Catchments
Water
analysis
hydrocarbon reservoir
capillary pressure
reactivation
sedimentary basin
stress field
Gases
plateau
hydrocarbon
water
gas

Keywords

  • natural CO2 reservoir
  • fault seal analysis
  • CO2 storage

Cite this

Miocic, J., Johnson, G., Gilfillan, S. M. V., McDermott, C. I., & Haszeldine, R. S. (2015). Fault seal analysis of a natural CO2 reservoir. 155-159. Paper presented at 4th International Conference on Fault and Top Seals 2015 : Art or Science, Almeria, Spain.
Miocic, J. ; Johnson, G. ; Gilfillan, S. M V ; McDermott, C. I. ; Haszeldine, R. S. / Fault seal analysis of a natural CO2 reservoir. Paper presented at 4th International Conference on Fault and Top Seals 2015 : Art or Science, Almeria, Spain.5 p.
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Miocic, J, Johnson, G, Gilfillan, SMV, McDermott, CI & Haszeldine, RS 2015, 'Fault seal analysis of a natural CO2 reservoir' Paper presented at 4th International Conference on Fault and Top Seals 2015 : Art or Science, Almeria, Spain, 20/09/15 - 24/09/15, pp. 155-159.

Fault seal analysis of a natural CO2 reservoir. / Miocic, J.; Johnson, G.; Gilfillan, S. M V; McDermott, C. I.; Haszeldine, R. S.

2015. 155-159 Paper presented at 4th International Conference on Fault and Top Seals 2015 : Art or Science, Almeria, Spain.

Research output: Contribution to conferencePaper

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AU - Miocic, J.

AU - Johnson, G.

AU - Gilfillan, S. M V

AU - McDermott, C. I.

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AB - For potential CO2 storage sites it is crucial to know if faults will act as flow baffles or if CO2 will be able to migrate out of the reservoir complex. Geomechanical fault seal analysis for a CO2 reservoirs is very similar to hydrocarbon reservoirs. However, fault rock seals have the potential to act very different in a CO2-rock-water system compared to a hydrocarbon-rock-water system. Natural CO2 reservoirs are common in sedimentary basins world-wide and here we present the results of a fault seal analysis, with emphasis on juxtaposition and fault rock seals, of a natural CO2 reservoir from the Colorado Plateau. The reservoir has leaked CO2 for more than 350 ka along faults. Our results show that the existing gas column can overcome the capillary entry pressure of the fault rocks, leading to migration of CO2 to the surface. Additionally, the fault is orientated favourable for reactivation in the current stress field.

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Miocic J, Johnson G, Gilfillan SMV, McDermott CI, Haszeldine RS. Fault seal analysis of a natural CO2 reservoir. 2015. Paper presented at 4th International Conference on Fault and Top Seals 2015 : Art or Science, Almeria, Spain.