SM5.3Advancements in Passive Seismic Monitoring of Induced Seismicity
|Convener: Roland Gritto | Co-Conveners: Marco Bohnhoff , Philippe Jousset|
Induced seismicity is a common phenomenon in many fields of subsurface exploration and has been found to be associated with i.e. hydrocarbon exploration, geothermal exploitation, open-pit and underground mining operations, CO2 sequestration, and filling of new water reservoirs. Public awareness and concern of induced seismicity has become ubiquitous in locations where subsurface exploration and storage is carried out in close proximity to communities. Of particular concerns are massive fluid injections for hydro-fracturing to increase subsurface permeability as well as long-term injection for the purpose of long-term storage. These concerns have led to regulations to passively monitor induced seismicity and consequently to a wealth of continuous seismic data. In contrast to the increase in data volume, the understanding of the relationship between exploration techniques and induced seismicity is still limited. New processing methods to analyze the data and quantitative models to better understand the causal relationship between exploration and induced seismicity are needed. The current session is intended to provide a platform to present the latest research and field studies related to induced seismicity. Topics to be presented include temporal variations of physical parameters in reservoirs including stress and pressure changes, spatial-temporal patterns of seismicity, source mechanisms of micro- or larger scale seismicity, mechanisms for triggered or induced events, and fracture-induced anisotropy. Contributions are sought from fundamental and applied research covering the fields of oil and gas exploration including hydro-fracturing, geothermal exploitation particularly related to enhanced geothermal systems, open pit and underground mining, CO2 storage and other fields where induced seismicity is observed.