Publication Abstract

not signed in
Log In
Title Numerical modelling of seismicity induced by fracture injections in a fractured reservoir

Authors J.F. Hazzard, R. P. Young and S.J. Oates

Publication Reference Mining and Tunnel Innovation and Opportunity, Proceedings of the 5th North American Rock Mechanics Symposium, Toronto,Canada, 1023-1030. University of Toronto Press.

Abstract A distinct element numerical model is presented to simulate fluid injection into a granite reservoir. The rock is simulated by an assembly of particles bonded together at points of contact. Fluid flow is simulated on the microscale such that full fluid-mechanical coupling exists. The model is run dynamically so that seismic information can be extracted during deformation and fracture. It is shown that if a full strength granite is assumed, then the model behavior is significantly different from the actual field results. More realistic model behaviors are realized if the granite is assumed to be permeated by a network of pre-existing weak joints. When an injection operation is simulated in this jointed model, realistic fluid pressure histories and realistic seismic source parameters are obtained. The model is then used to help better understand the mechanics of what is occurring in the reservoir. Some interesting observations are made including that the deformation and resulting seismicity in the model occurs ahead of the fluid pressure front and that the zone of stimulation grows asymmetrically away from the injection point.

Key Figure N/A

Link http://www.lassondeinstitute.utoronto.ca/young/pubs/l102hanu.pdf



Return to publications list

< Return to the home page   ::  Contact Us
Applied Seismology Consultants