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Microseismic monitoring data from a treatment associated with a Mw 4

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Presentation on theme: "Microseismic monitoring data from a treatment associated with a Mw 4"— Presentation transcript:

1 Fig. 3 Microseismic monitoring data from a treatment associated with a Mw 4.1 earthquake.
Microseismic monitoring data from a treatment associated with a Mw 4.1 earthquake. (A) Depth slice through the 3D seismic volume showing normalized seismic reflection amplitude at the level of the Beaverhill Lake Group (at 3386-m depth; Fig. 2), which directly underlies the Duvernay Formation (gray line, treatment well location; black solid line, profile in Fig. 2; red star, Mw 4.1 earthquake). Various structural features can be interpreted, including the edge of the Swan Hills reef structure and a series of roughly north-south lineaments. Seismic event locations are overlain, colored by depth. (B) Enlargement of (A) around the treatment well [triangles, injection stages (numbered at intervals)]. Focal mechanism of the Mw 4.1 event (27) is shown as a beach ball. Approximate orientation of maximum horizontal stress is labeled (SHmax); hydraulic fractures should grow parallel to this direction (1). (C) Depth of the seismic events versus time for the events in the immediate vicinity of the mainshock [red dashed lines, stage start times; black dotted lines, stratigraphy according to a well log ~3 km north (BhL, Beaverhill Lake; Dv, Duvernay; Irtn, Ireton); red star, Mw 4.1 earthquake]. Thomas S. Eyre et al. Sci Adv 2019;5:eaav7172 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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