Large?Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing
نویسندگان
چکیده
Induced seismicity due to fluid injection, including hydraulic fracturing, is an increasingly common phenomenon worldwide; yet, the mechanisms by which fracturing causes fault activation remain unclear. Here we show that preexisting fracture networks are instrumental in transferring pressures larger faults on dynamic rupture occurs. Studies of fracturing-induced North America have often used observations from regional seismograph at distances 10s km, and as such lack resolution answer some key questions about triggering mechanisms. To carry out a more detailed analysis activation, use data dense sensor array located hydraulic-fracturing site Alberta, Canada. The spatiotemporal distribution event hypocenters, coupled with measurements seismic anisotropy, reveal presence corridors allowed communication fluid-pressure perturbations faults, over 1 km or more. permeable can significantly increase volume rock affected pore-pressure increase, thereby increasing probability induced seismicity. This study demonstrates importance understanding connectivity natural fractures for assessing potential hazards associated shale formations offers case exposition fracturing.
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ژورنال
عنوان ژورنال: Journal Of Geophysical Research: Solid Earth
سال: 2021
ISSN: ['2169-9356', '2169-9313']
DOI: https://doi.org/10.1029/2020jb020311