Regional assessment of sealing faults through pore-pressure analysis in the northern atlantic

Dainelli, J.; Vignolo, A.

doi:10.3997/1365-2397.1993014

Cited by 2 publications

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“…[26] The normal and shear stress acting on the faults depend on the pore pressure variation experienced by the reservoir, the fault dip angle, the initial stress regime and the hydraulic conductivity of the faulted zone [Cappa and Rutqvist, 2011b]. Based on available information [Dainelli and Vignolo, 1993], Reservoir faults/thrusts are assumed impervious, namely constituting an impermeable barrier to fluid flow.…”

Section: Reactivation Of Existing Faults/thrusts and Induced Seismicitymentioning

confidence: 99%

Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges

2013

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[1] Sequestration of large amounts of CO 2 within deep underground reservoirs has been proposed as a potential approach for reducing atmospheric emissions of greenhouse gases. A CO 2 sequestration project should address the associated environmental and safety issues and, in this respect, the importance of geomechanics has recently been widely recognized. Geomechanics is even more important when fluid injection is planned in faulted reservoirs. How much CO 2 can be safely injected into multi-compartment reservoirs? Are geomechanical constraints more restrictive than flow-dynamic constraints? These and other questions are addressed in the present study using a three-dimensional finite element-interface element geomechanical model. We simulate the possible mechanical failure in both the injected formation and the caprock, the fault/thrust reactivation, and the ground surface displacement in a faulted reservoir of the offshore northern Italy, where seismic surveys provided an accurate characterization of the faulted geological structure. Based on reliable petrophysical/geomechanical properties from well logs and pore overpressure as predicted by a fluid-dynamic model, the results show that the injection of 1 10 6 ton/a of CO 2 may be performed over a few years only. Thereafter, part of the injected formation fails by shear stress. A number of parametric scenarios are investigated to address the major uncertainties on the geomechanical response to CO 2 injection. The modeling outcome suggests that shear failure and faults/thrusts reactivation can occur much before attaining the hydraulic fracturing pressure, hence representing two major constraints for a safe and permanent containment.

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Section: Reactivation Of Existing Faults/thrusts and Induced Seismicitymentioning

confidence: 99%

Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges

2013

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Multiphysics modeling of CO2 sequestration in a faulted saline formation in Italy

Castelletto

Teatini

Gambolati

et al. 2013

Advances in Water Resources

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Regional assessment of sealing faults through pore-pressure analysis in the northern atlantic

Cited by 2 publications

References 0 publications

Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges

Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges

Multiphysics modeling of CO2 sequestration in a faulted saline formation in Italy

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Regional assessment of sealing faults through pore-pressure analysis in the northern atlantic

Cited by 2 publications

References 0 publications

Geological CO2 sequestration in multi‐compartment reservoirs: Geomechanical challenges

Geological CO2 sequestration in multi‐compartment reservoirs: Geomechanical challenges

Multiphysics modeling of CO2 sequestration in a faulted saline formation in Italy

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Product

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Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges

Geological CO₂ sequestration in multi‐compartment reservoirs: Geomechanical challenges