Numerical assessment of fault impact on caprock seals during CO2 sequestration

Newell, Pania; Martinez, Mario J.

doi:10.1016/j.ijggc.2019.102890

Title: Numerical assessment of fault impact on caprock seals during CO₂ sequestration

Journal Article · Sun Mar 01 00:00:00 EST 2020 · International Journal of Greenhouse Gas Control

DOI:https://doi.org/10.1016/j.ijggc.2019.102890· OSTI ID:1618086

Newell, Pania ^[1]; Martinez, Mario J. ^[2]

Univ. of Utah, Salt Lake City, UT (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Coupled fluid-flow and geomechanical analysis of caprock integrity has gained a lot of attention among scientists and researchers investigating the long-term performance of geologic carbon storage systems. Reactivation of pre-existing fractures within the caprock or re-opening of faults can create permeable pathways which can influence the seal integrity. Stability of the caprock during and after injection of super-critical CO₂, and the impact of pre-existing fractures in the presence or absence of one or multiple faults have been investigated in this study. The impact of the wellbore orientation and the injection rate are among other key factors in understanding the structural trapping mechanisms within such geological formations. In this study, we numerically investigated the impact of each of these factors. This study revealed the interplay between joints and faults and how different leakage pathways are formed and under which scenario they play a dominant role in terms of CO₂ leakage. Finally, this study also highlights the role of one versus multiple faults in the domain and the importance of the fault hydrological property in forming leakage pathway.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; SC0001114; NA0003525

OSTI ID:: 1618086

Report Number(s):: SAND-2019-12964J; 680964

Journal Information:: International Journal of Greenhouse Gas Control, Vol. 94, Issue C; ISSN 1750-5836

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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References (17)

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