• Vladimir Lyakhovsky

  • Eyal Shalev (Stanislavsky)

  • Numerical Analysis Lab

  • Hydraulic Stimulation
  • Dissolution
  • Collapse
  • Hydrogeology

  • Hydraulic Stimulation

      Induced seismicity by wellbore fluid injection is an important tool for enhancing permeability in hydrocarbon and geothermal reservoirs. During hydraulic stimulations, a complex interaction is observed between the injected flux and pressure, number and magnitude of induced seismic events, and changes in seismic velocities. Fluid injection increases the pore pressure that promotes rock failure by shear or tension and often triggers micro-seismic events and faults and fractures formation/reactivation. The newly formed/reactivated faults and fractures are the features responsible for the permeability enhancement. The animation shows model results of pore pressure, damage and seismicity distribution during hydraulic stimulation of a granitic reservoir. Wellbore flux and pressure are shown below.

    Shalev, E., and Lyakhovsky, V., The processes controlling damage zone propagation induced by wellbore fluid injection, Geophys. J. Int., 193, 209-219, 2013 (Download PDF file)

    Simulated damage, pore pressure, and seismicity during fluid injection. Wellbore flux and pressure are plotted below.