| Titre | Spatiotemporal analysis of seismotectonic state of injection-induced seismicity clusters in the Western Canada Sedimentary Basin |
| |
| Auteur | Dokht, R M H ;
Kao, H; Mahani, A B; Visser, R |
| Source | Journal of Geophysical Research, Solid Earth vol. 126, issue 4, e2020JB021362, 2021 p. 1-19, https://doi.org/10.1029/2020JB021362 |
| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200746 |
| Éditeur | Blackwell Publishing Ltd |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1029/2020JB021362 |
| Media | papier; en ligne; numérique |
| Formats | pdf; html |
| Province | Colombie-Britannique; Alberta |
| SNRC | 83B; 83C; 83D; 83E; 83F; 83G; 83J; 83K; 83L; 83M; 83N; 83O; 84B; 84C; 84D; 84E; 84F; 84G; 84J; 84K; 84L; 84M; 84N; 84O; 93A; 93B; 93C; 93F; 93G; 93H; 93I; 93J; 93K; 93N; 93O; 93P; 94A; 94B; 94C; 94F; 94G;
94H; 94I; 94J; 94K; 94N; 94O; 94P |
| Région | Rivière de la Paix; Dawson Creek; Fox Creek; Horn River; Montney |
| Lat/Long OENS | -126.0000 -114.0000 60.0000 52.0000 |
| Sujets | séismologie; sismicité; risque sismique; réseau sismique; risque de tremblement de terre; analyse statistique; industrie pétrolière; recuperation d'hydrocarbures; fracturation hydraulique; évacuation des
déchets liquides; epicentres; milieux tectoniques; analyse des déformations; Bassin sédimentaire de l'ouest canadien; Eaux usées; géophysique; Sciences et technologie; Économie et industrie; Santé et sécurité |
| Illustrations | cartes de localisation; cartes géolscientiques généralisées; graphiques; tableaux; séries chronologiques; histogrammes |
| Programme | Géosciences environnementales Gaz de schiste - sismicité induite |
| Diffusé | 2021 03 13 |
| Résumé | (disponible en anglais seulement)
The observations of spatiotemporal distribution of seismicity in western Canada indicate that the occurrence of earthquakes is tied to the hydraulic fracturing
operations and disposal of co-produced wastewater. In this study, we investigate the temporal changes in the frequency-magnitude distributions for multiple clusters of induced events in regions where the level of background seismicity is low. The
induced events are clustered into six major groups using density-based spatial and soft clustering algorithms based on their epicenters. Each cluster is identified by different distributions of earthquake magnitudes and injection scenarios. The
linear relationship between the number of induced earthquakes and cumulative injection volume enables us, on a regional scale, to quantitatively characterize the seismotectonic conditions of the clusters using the estimates of the seismogenic
indices. The calculated seismogenic indices agree very well with the expected seismic response to hydraulic fracturing and wastewater disposal and show a strong correlation with tectonically accumulated strain energy. Statistical models based on the
seismogenic index can be employed to mitigate the potential risk of large magnitude induced events. |
| Sommaire | (Résumé en langage clair et simple, non publié)
In western Canada, there has been a dramatic increase in the rate of seismicity associated with oil and gas development activities, including
hydraulic fracturing and the disposal of waste fluids in deep wells. The danger posed by the occurrence of injection-induced seismicity is of growing concern to both the general public and regulators. In this study, we perform a cluster analysis and
investigate the correlation between local seismicity and widely distributed injection activity in the Western Canadian Sedimentary Basin. We characterize the seismotectonic activity of clusters of fluid injection sites using estimates of seismogenic
indices. The Seismogenic index provides a way to quantify the potential seismic response of a given site to fluid injection. We observe that there is a higher probability of large magnitude induced events in areas of high tectonic deformation rates.
The statistical models presented in this study can be used to predict the magnitude of the largest expected injection-induced events in western Canada, which has implications for mitigating the potential seismic risk from the injection. of
fluid. |
| GEOSCAN ID | 328105 |
|
|