journal article May 22, 2018

Fluid Injection and Time‐Dependent Seismic Hazard in the Barnett Shale, Texas

View at Publisher Save 10.1029/2018gl077696
Abstract
AbstractThe Barnett Shale in Texas experienced an increase in seismicity since 2008, coinciding with high‐volume deep fluid injection. Despite the spatial proximity, the lack of a first‐order correlation between seismic records and the total volume of injected fluid requires more comprehensive geomechanical analysis, which accounts for local hydrogeology. Using time‐varying injections at 96 wells and employing a coupled linear poroelastic model, we simulate the spatiotemporal evolution of pore pressure and poroelastic stresses during 2007–2015. The overall contribution of poroelastic stresses to Coulomb failure stress change is ~10% of that of pore pressure; however, both can explain the spatiotemporal distribution of earthquakes. We use a seismicity rate model to calculate earthquake magnitude exceedance probability due to stress changes. The obtained time‐dependent seismic hazard is heterogeneous in space and time. Decreasing injection rates does not necessarily reduce probabilities immediately.
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Metrics
42
Citations
48
References
Details
Published
May 22, 2018
Vol/Issue
45(10)
Pages
4743-4753
License
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Funding
National Science Foundation Award: EAR1344424
National Aeronautics and Space Administration Award: NNX17AD98G
Cite This Article
Guang Zhai, Manoochehr Shirzaei (2018). Fluid Injection and Time‐Dependent Seismic Hazard in the Barnett Shale, Texas. Geophysical Research Letters, 45(10), 4743-4753. https://doi.org/10.1029/2018gl077696
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