Pore-pressure diffusion, enhanced by poroelastic stresses, controls induced seismicity in Oklahoma.

ABSTRACT: Induced seismicity linked to geothermal resource exploitation, hydraulic fracturing, and wastewater disposal is evolving into a global issue because of the increasing energy demand. Moderate to large induced earthquakes, causing widespread hazards, are often related to fluid injection into deep permeable formations that are hydraulically connected to the underlying crystalline basement. Using injection data combined with a physics-based linear poroelastic model and rate-and-state friction law, we compute the changes in crustal stress and seismicity rate in Oklahoma. This model can be used to assess earthquake potential on specific fault segments. The regional magnitude-time distribution of the observed magnitude (M) 3+ earthquakes during 2008-2017 is reproducible and is the same for the 2

SUBMITTER: Zhai G 

PROVIDER: S-EPMC6697790 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature