Articles | Volume 49
https://doi.org/10.5194/adgeo-49-85-2019
https://doi.org/10.5194/adgeo-49-85-2019
04 Sep 2019
 | 04 Sep 2019

Inferring microseismic source mechanisms and in situ stresses during triaxial deformation of a North-Sea-analogue sandstone

Luke Griffiths, Jérémie Dautriat, Ismael Vera Rodriguez, Kamran Iranpour, Guillaume Sauvin, Joonsang Park, Joel Sarout, Magnus Soldal, Lars Grande, Volker Oye, David N. Dewhurst, Nazmul Haque Mondol, and Jung Chan Choi

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Cited articles

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Chapman, C. H. and Leaney, W. S.: A new moment-tensor decomposition for seismic events in anisotropic media: Moment-tensor decomposition, Geophys. J. Int., 188, 343–370, https://doi.org/10.1111/j.1365-246X.2011.05265.x, 2012. 
Chen, X., Wang, R., Huang, W., Jiang, Y., and Yin, C.: Clustering-based stress inversion from focal mechanisms in microseismic monitoring of hydrofracturing, Geophys. J. Int., 215, 1887–1899, https://doi.org/10.1093/gji/ggy388, 2018. 
Dautriat, J., Sarout, J., David, C., Bertauld, D., and Macault, R.: Remote monitoring of the mechanical instability induced by fluid substitution and water weakening in the laboratory, Phys. Earth Planet In., 261, 69–87, https://doi.org/10.1016/j.pepi.2016.06.011, 2016. 
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Short summary
Faint earth tremors may occur when exploiting geological reservoirs to extract hydrocarbons, produce geothermal energy, or store CO2. This microseismicity may reveal the location of fractures within the reservoir, and the mechanical stresses acting on them. We present and demonstrate (on laboratory data) a new workflow for analysing microseismic data, considering fracture models relevant to geoengineering applications to infer fracture mechanisms and the stress conditions local to them.