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

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The 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.

    Original languageEnglish (US)
    JournalGeophysical Research Letters
    DOIs
    StateAccepted/In press - Jan 1 2018

    Fingerprint

    fluid injection
    seismic hazard
    hazards
    shale
    stress change
    pore pressure
    seismicity
    earthquakes
    hydrogeology
    earthquake magnitude
    injection
    porosity
    proximity
    well
    earthquake
    fluid
    fluids
    rate

    Keywords

    • Fluid injection
    • Induced seismicity
    • Pore pressure
    • Poroelasticity
    • Seismic hazard
    • Seismicity rate

    ASJC Scopus subject areas

    • Geophysics
    • Earth and Planetary Sciences(all)

    Cite this

    @article{338fceb5ace24e5e92daf0c98fcacfad,
    title = "Fluid Injection and Time-Dependent Seismic Hazard in the Barnett Shale, Texas",
    abstract = "The 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.",
    keywords = "Fluid injection, Induced seismicity, Pore pressure, Poroelasticity, Seismic hazard, Seismicity rate",
    author = "Guang Zhai and Manoochehr Shirzaei",
    year = "2018",
    month = "1",
    day = "1",
    doi = "10.1029/2018GL077696",
    language = "English (US)",
    journal = "Geophysical Research Letters",
    issn = "0094-8276",
    publisher = "American Geophysical Union",

    }

    TY - JOUR

    T1 - Fluid Injection and Time-Dependent Seismic Hazard in the Barnett Shale, Texas

    AU - Zhai, Guang

    AU - Shirzaei, Manoochehr

    PY - 2018/1/1

    Y1 - 2018/1/1

    N2 - The 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.

    AB - The 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.

    KW - Fluid injection

    KW - Induced seismicity

    KW - Pore pressure

    KW - Poroelasticity

    KW - Seismic hazard

    KW - Seismicity rate

    UR - http://www.scopus.com/inward/record.url?scp=85047563883&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85047563883&partnerID=8YFLogxK

    U2 - 10.1029/2018GL077696

    DO - 10.1029/2018GL077696

    M3 - Article

    JO - Geophysical Research Letters

    JF - Geophysical Research Letters

    SN - 0094-8276

    ER -