Abstract
This paper presents a hydromechanical simulation of large-scale analysis to assess the risk of CO2 leakage through faults within the reservoir and caprock as potential pathways. The study involves the evaluation of slip tendency and distance to failure of existing faults in both the caprock and reservoir, which are crucial parameters influencing the potential for induced seismicity. To that aim, thermo-hydro-mechanical simulation of cold CO2 injection close to the cap rock and within a hightemperature (110°C) depleted gas reservoir is carried out to quantify the additional stresses and strains caused by the thermal expansion/contraction of the rocks. Since preferential fluid flow is more pronounced through faults and fractures experiencing high slip tendency, here the assessment of slip tendency shows no concerns regarding fault seal and the behavior of faults as pathways for the migration of CO2 injection. In addition, this study utilizes distance to failure analysis by driving data from analyses of stress orientation, magnitude, fault geometry, and temperature. The findings indicate that there are no significant concerns regarding the integrity of fault seals or the behavior of faults as potential routes for CO2 injection migration.
Original language | English |
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Title of host publication | Proceedings of the 58th U.S. Rock Mechanics/Geomechanics Symposium |
Publisher | American Rock Mechanics Association (ARMA) |
Publication date | 2024 |
Article number | ARMA 24–507 |
ISBN (Electronic) | 978-0-9794975-9-9 |
DOIs | |
Publication status | Published - 2024 |
Event | 58th U.S. Rock Mechanics/Geomechanics Symposium - Golden, United States Duration: 23 Jun 2024 → 26 Jun 2024 Conference number: 58 |
Conference
Conference | 58th U.S. Rock Mechanics/Geomechanics Symposium |
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Number | 58 |
Country/Territory | United States |
City | Golden |
Period | 23/06/2024 → 26/06/2024 |