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Title: Geologic carbon storage is unlikely to trigger large earthquakes and reactivate faults through which CO 2 could leak

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2]
  1. Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Soil Mechanics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and
  2. Grup d'Hidrologia Subterrània (GHS), Institute of Environmental Assessment and Water Research, Consejo Superior de Investigaciones Cientificas, 08034 Barcelona, Spain

Significance Geologic carbon storage remains a safe option to mitigate anthropogenic climate change. Properly sited and managed storage sites are unlikely to induce felt seismicity because ( i ) sedimentary formations, which are softer than the crystalline basement, are rarely critically stressed; ( ii ) the least stable situation occurs at the beginning of injection, which makes it easy to control; ( iii ) CO 2 will dissolve into brine at a significant rate, reducing overpressure; and ( iv ) CO 2 will not flow across the caprock because of capillarity, but brine will, which will reduce overpressure further. Furthermore, CO 2 leakage through fault reactivation is unlikely because the high clay content of caprocks ensures a reduced permeability and increased entry pressure along localized deformation zones.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1235178
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Vol. 112 Journal Issue: 19; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 111 works
Citation information provided by
Web of Science

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