Effect of geologic depositional environment on CO2 storage efficiency

Research output: Contribution to journalConference article

Abstract

The storage potential and movement of fluids within a formation is dependent on hydraulic characterization unique to each depositional environment. Storage efficiency (E), the ratio of the injected volume of CO2 to the accessible pore volume, quantifies the CO2 storage capacity in a geologic depositional environment, providing a means to assess the CO2 storage resource of candidate reservoirs. This paper quantifies the ranges for E via numerical modeling for eight depositional environments: deltaic, shelf clastic, shelf carbonate, fluvial deltaic, strandplain, reef, fluvial and alluvial, and turbidite. An important aspect of this work is the development of geologic and geocellular modeling that reflects the uniqueness of each depositional environment. Depositional environments were interpreted from core and geophysical log data; geologic and petrophysical data from oil fields and gas storage sites were used as constraints in the development of geocellular models, which were upscaled for flow simulations. Evaluation of the effects of geologic structures on storage efficiency indicates it causes a net increase in efficiency. Fluvial deltaic had the highest E and shelf carbonate had the lowest.

Original languageEnglish (US)
Pages (from-to)5247-5257
Number of pages11
JournalEnergy Procedia
Volume63
DOIs
StatePublished - Jan 1 2014
Event12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 - Austin, United States
Duration: Oct 5 2014Oct 9 2014

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Keywords

  • Depositional environment
  • Formations
  • Storage efficiency
  • Structure relief

ASJC Scopus subject areas

  • Energy(all)

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