Víctor Vilarrasa
Spanish National Research Council
Geothermal gradientSupercritical fluidGeologyEngineeringSeismologyFault (geology)Permeability (earth sciences)Geotechnical engineeringCaprockEuropean unionOverpressureSaline aquiferEuropean researchEnvironmental scienceMechanicsPetrologyAquiferPetroleum engineeringInduced seismicityStress (mechanics)
169Publications
23H-index
2,545Citations
Publications 132
Newest
#1Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
#2Víctor VilarrasaH-Index: 23
#1Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
#2Roman Y. Makhnenko (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 12
Last. Sohrab Gheibi (NTNU: Norwegian University of Science and Technology)H-Index: 5
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Abstract Large amounts of carbon dioxide (CO2) should be injected in deep saline formations to mitigate climate change, implying geomechanical challenges that require further understanding. Pressure build-up induced by CO2 injection will decrease the effective stresses and may affect fault stability. Geomechanical effects of overpressure induced by CO2 injection either in the hanging wall or in the foot wall on fault stability are investigated. CO2 injection in the presence of a low-permeable fa...
31 CitationsSource
#1Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
Fluid injection in deep geological formations usually induces microseismicity. In particular, industrial-scale injection of CO2 may induce a large number of microseismic events. Since CO2 is likely to reach the storage formation at a lower temperature than that corresponding to the geothermal gradient, both overpressure and cooling decrease the effective stresses and may induce microseismicity. Here, we investigate the effect of the stress regime on the effective stress evolution and fracture st...
11 CitationsSource
#1Víctor Vilarrasa (LBNL: Lawrence Berkeley National Laboratory)H-Index: 23
#2Jonny Rutqvist (LBNL: Lawrence Berkeley National Laboratory)H-Index: 65
Last. Jens Birkholzer (LBNL: Lawrence Berkeley National Laboratory)H-Index: 47
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Abstract Expansive soils are suitable as backfill and buffer materials in engineered barrier systems to isolate heat-generating nuclear waste in deep geological formations. The canisters containing nuclear waste would be placed in tunnels excavated at a depth of several hundred meters. The expansive soil should provide enough swelling capacity to support the tunnel walls, thereby reducing the impact of the excavation-damaged zone on the long-term mechanical and flow-barrier performance. In addit...
12 CitationsSource
#1Jonny Rutqvist (LBNL: Lawrence Berkeley National Laboratory)H-Index: 65
#2Antonio Pio Rinaldi (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 24
Last. Víctor Vilarrasa (CSIC: Spanish National Research Council)H-Index: 23
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In the light of current concerns related to induced seismicity associated with geological carbon sequestration (GCS), this paper summarizes lessons learned from recent modeling studies on fault activation, induced seismicity, and potential for leakage associated with deep underground carbon dioxide (CO2) injection. Model simulations demonstrate that seismic events large enough to be felt by humans require brittle fault properties and continuous fault permeability allowing pressure to be distribu...
84 CitationsSource
#1Mehdi Zeidouni (LSU: Louisiana State University)H-Index: 14
#2Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
Pressure changes in the above zone, i.e., the overlying aquifer of an injection zone separated by a sealing caprock, are usually attributed to leakage through wells. However, pressure changes can be induced geomechanically due to rock deformation without any hydraulic connection between the injection zone and the above zone where the pressure change is observed. To account for these two causes of pressure change in the above zone, we develop an analytical solution to evaluate the deformation-ind...
6 CitationsSource
#1Sohrab Gheibi (NTNU: Norwegian University of Science and Technology)H-Index: 5
#2Rune M. Holt (NTNU: Norwegian University of Science and Technology)H-Index: 20
Last. Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
view all 3 authors...
5 Citations
#1Víctor VilarrasaH-Index: 23
#2Lyesse LalouiH-Index: 52
Geomechanical stability issues may arise due to induced thermal stresses because CO2 will generally reach the storage formation at a temperature lower than that of the reservoir. Cold injection will form a cold region around the injection well, which will induce thermal stress reduction. We simulate cold CO2 injection in deep saline formations in a normal faulting stress regime and investigate under what conditions thermal stresses may jeopardize the caprock sealing capacity by studying the effe...
#1Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
#2Jesús Carrera (CSIC: Spanish National Research Council)H-Index: 72
Last. S. Olivella (EPFL: École Polytechnique Fédérale de Lausanne)
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Geologic carbon storage is considered to be one of the main solutions to significantly reduce CO2 emissions to the atmosphere to mitigate climate change. CO2 injection in deep geological formations entails a two-phase flow, being CO2 the non-wetting phase. One of the main concerns of geologic carbon storage is whether the overpressure induced by CO2 injection may compromise the caprock integrity and faults stability. We numerically investigate the two-phase flow effects that govern the overpress...
Source
#1Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
#2Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
Geomechanical stability issues may arise due to induced thermal stresses because CO2 will generally reach the storage formation at a temperature lower than that of the reservoir. Cold injection will form a cold region around the injection well, which will induce thermal stress reduction. We simulate cold CO2 injection in deep saline formations in a normal faulting stress regime and investigate under what conditions thermal stresses may jeopardize the caprock sealing capacity by studying the effe...
10 CitationsSource