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Using next-generation seismic monitoring and processing to help manage injection and extraction operations
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE GeoTech 2021 First EAGE Workshop on Induced Seismicity, Mar 2021, Volume 2021, p.1 - 4
Abstract
Summary
The management of induced seismicity during hydraulic stimulations and other injection or extraction operations benefits greatly from any information on geohazards or the state of stress in the subsurface. The ability for pore-pressure and poro-elastic stress perturbations to propagate beyond a modest buffer around the reservoir has underscored the need for such knowledge over a footprint wider than the pad. Often, the seismicity itself allows for such knowledge to be brought better into focus. Locating events with precision will illuminate fault geometries that are often unobserved though other means. By recording with a sufficiently dense network, enough lower magnitude events will be observed to maximize the opportunities to image these faults. For larger events recorded across a sufficiently dense network, the first motions of the P and S waves can constrain the moment tensors, allowing for possible fault geometries to be explored, the faulting regime to be understood with greater nuance, and the stress and strains in and around the reservoir to be understood.
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