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Geologic Heterogeneity Controls on Trapping and Migration of CO2

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1029/2022gl099104· OSTI ID:1884517
 [1];  [2];  [2]
  1. Univ. of Texas, Austin, TX (United States); The University of Texas at Austin, Bureau of Economic Geology
  2. Univ. of Texas, Austin, TX (United States)
When CO2 is injected into sedimentary basins, the fate of the buoyant CO2 will be determined by how it interacts with the underlying geologic heterogeneities. Here we geologically print a cross-bedded pattern using two different bead sizes, and then conduct flow experiments to observe buoyant flow pathways, migration speed, and immobilized volumes. The amount of buoyant phase trapped under the heterogeneities is observed to vary by two orders of magnitude, with the controlling parameter being the size contrast between the coarse and fine grains that make up the structure. Furthermore, the results allow an estimate of heterogeneity trapping, and show how CO2 trapping in aquifers can be experimentally evaluated before injection.
Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE), Clean Coal and Carbon Management; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FE0031558; SC0001114
OSTI ID:
1884517
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 16 Vol. 49; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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