Title: De-risking fault leakage risk and containment integrity for subsurface storage applications

Journal Article · · iScience
ORCiD logo [1];  [2]
  1. Shell Global Solutions International B.V., The Hague (Netherlands); Shell Global Solutions, Aberdeen (United Kingdom)
  2. Shell Global Solutions U.K., Aberdeen (United Kingdom)

The subsurface is pivotal in the energy transition, for the sequestration of CO2 and energy storage. It is crucial to understand to what extent geological faults may form leakage pathways that threaten the containment integrity of these projects. Fault flow behavior has been studied in the context of hydrocarbon development, supported by observations from wells drilled through faults, but such observations are rare in geoenergy projects. Focusing on mechanical behavior as early indicator of potential leakage risks, a probabilistic Coulomb Failure Stress workflow is developed and demonstrated using data from the Decatur CO2 sequestration project to rank faults based on their containment risk. The analysis emphasizes the importance of fault throw relative to reservoir thickness and pore pressure change in assessing reactivation risks. Integrating this mechanical assessment with geological and dynamic fault analyses contributes to derisking fault containment for geoenergy applications, providing valuable insights for the successful development of subsurface storage projects.

Research Organization:
University of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy and Carbon Management (FECM)
Grant/Contract Number:
FC26-05NT42588
OSTI ID:
2472282
Journal Information:
iScience, Journal Name: iScience Journal Issue: 6 Vol. 27; ISSN 2589-0042
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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