2020
DOI: 10.1029/2020jb020190
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Seismicity and Stress Associated With a Fluid‐Driven Fracture: Estimating the Evolving Geometry

Abstract: A coupled approach, combining the theory of rate-and state-dependent friction and methods from poroelasticity, forms the basis for a quantitative relationship between displacements and fluid leak-off from a growing fracture and changes in the rate of seismic events in the region surrounding the fracture. Poroelastic Green's functions link fracture aperture changes and fluid flow from the fracture to changes in the stress field and pore pressure in the adjacent formation. The theory of rate-and state-dependent … Show more

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Cited by 2 publications
(3 citation statements)
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References 76 publications
(135 reference statements)
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“…Because of the uncertain relationship between intrusion-related stress changes and seismicity, we do not use the seismicity data to directly estimate aperture changes in the evolving fracture zone (Vasco, Smith, and Hoversten 2020). Rather, we hypothesize a causal link between the observed seismicity and aperture change, and design a regularization measure that will attempt to put the largest changes in fracture aperture at locations with abundant seismicity.…”
Section: Imaging Fault and Fracture Dynamics Using Geodetic And Seism...mentioning
confidence: 99%
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“…Because of the uncertain relationship between intrusion-related stress changes and seismicity, we do not use the seismicity data to directly estimate aperture changes in the evolving fracture zone (Vasco, Smith, and Hoversten 2020). Rather, we hypothesize a causal link between the observed seismicity and aperture change, and design a regularization measure that will attempt to put the largest changes in fracture aperture at locations with abundant seismicity.…”
Section: Imaging Fault and Fracture Dynamics Using Geodetic And Seism...mentioning
confidence: 99%
“…An alternative to regularization methods based upon injection location is to use natural seismicity as a proxy for locations that should correspond to fracture aperture changes. This approach can be based upon the theory rate-and state-dependent friction (Dieterich 1994) and the development of seismicity around a fluid-driven fracture (Vasco, Smith, and Hoversten 2020). As noted by Pedersen, Sigmundsson, and Einarsson (2007), some care must be exercised when applying Dieterich's theory in geothermal and volcanic areas due to the relationship between the current and pre-existing stressing rates.…”
Section: Estimating Fracture Aperture Changesmentioning
confidence: 99%
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