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This content will become publicly available on May 26, 2019

Title: Heterogeneity-assisted carbon dioxide storage in marine sediments

Global climate change is a pressing problem caused by the accumulation of anthropogenic greenhouse gas emissions in the atmosphere. Carbon dioxide (CO 2) capture and storage is a promising component of a portfolio of options to stabilize atmospheric CO 2 concentrations. Meaningful capture and storage requires the permanent isolation of enormous amounts of CO 2 away from the atmosphere. In this paper, we investigate the effectiveness of heterogeneity-induced trapping mechanism, in potential synergy with a self-sealing gravitational trapping mechanism, for secure CO 2 storage in marine sediments. We conduct the first comprehensive study on heterogeneous marine sediments with various thicknesses at various ocean depths. Prior studies of gravitational trapping have assumed homogeneous (deep-sea) sediments, but numerous studies suggest reservoir heterogeneity may enhance CO 2 trapping. Heterogeneity can deter the upward migration of CO 2 and prevent leakage through the seafloor into the seawater. Using geostatistically-based Monte Carlo simulations of CO 2 transport in heterogeneous sediment, we show that strong spatial variability in permeability is a dominant physical mechanism for secure CO 2 storage in marine sediments below 1.2 km water depth (less than half of the depth needed for the gravitational trapping). We identify thresholds for sediment thickness, mean permeabilitymore » and porosity, and their relationships to meaningful injection rates. Our results for the U.S. Gulf of Mexico suggest that heterogeneity-assisted trapping has a greater areal extent with more than three times the CO 2 storage capacity for secure offshore CO 2 storage than with gravitational trapping. Finally, these characteristics offer CO 2 storage opportunities that are closer to coasts, more accessible, and likely to be less costly.« less
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [12] ; ORCiD logo [4] ;  [13] ;  [11]
  1. Jilin Univ., Changchun (China). College of Construction Engineering; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Wyoming, Laramie, WY (United States). Dept. of Geology and Geophysics
  3. The Ohio State Univ., Columbus, OH (United States). Dept. of Civil, Environmental, and Geodetic Engineering. John Glenn College of Public Affairs
  4. The Ohio State Univ., Columbus, OH (United States). School of Earth Sciences
  5. Univ. of Wyoming, Laramie, WY (United States). Dept. of Geology and Geophysics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy & Transportation Science Division
  6. Edwards Aquifer Authority, San Antonio, TX (United States)
  7. Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Nanchang Univ. (China). School of Resources, Environmental and Chemical Engineering
  8. New Mexico Inst. of Mining and Technology (New Mexico Tech), Socorro, NM (United States). Petroleum Recovery Research Center
  9. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.
  10. Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.
  11. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  12. Jilin Univ., Changchun (China). College of Construction Engineering
  13. Univ. of Cincinnati, OH (United States). Dept. of Geology
Publication Date:
Report Number(s):
LA-UR-16-27783
Journal ID: ISSN 0306-2619
Grant/Contract Number:
AC52-06NA25396; 41772253; 1230691
Type:
Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 225; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The Ohio State Univ., Columbus, OH (United States); Univ. of Cincinnati, OH (United States); Jilin Univ., Changchun (China)
Sponsoring Org:
USDOE; National Science Foundation (NSF); US-China Advanced Coal Technology Consortium; National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CO2 storage; marine sediment; heterogeneity-assisted trapping
OSTI Identifier:
1459831