Generating Discrete Fracture Networks constrained by microseismcity.

Francois Bonneau and Guillaume Caumon and Judith Sausse and Philippe Renard. ( 2012 )
in: Proc. 32nd Gocad Meeting, Nancy

Abstract

Hydraulic fracturing induces microseismicity due to fluid pressure increase in the saturated porous medium. Part of this microseismicity is related to the propagation of the pressure front. The dynamic evolution of this fracture-triggering front gives information on the fracture network and can be used to calibrate the geometry and connectivity of a Discrete Fracture Network (dfn). The suggested method consists in simulating an initial dfn and estimating the propagation of the pressure front using a fast marching method. We define an objective function evaluating the mismatch between the geometry of the triggering front for a 100 hour arrival time estimated from microseismic analysis and the geometry of the pressure front for a 100 hour arrival time estimated using a Fast-Marching computation. This misfit volume is then used to characterize the dfn quality. The methodology is applied to the Soultz-sous-Forˆts granitic geothermal heat exchanger (France).

Download / Links

BibTeX Reference

@INPROCEEDINGS{Bonneau2GM2012,
    author = { Bonneau, Francois and Caumon, Guillaume and Sausse, Judith and Renard, Philippe },
     title = { Generating Discrete Fracture Networks constrained by microseismcity. },
 booktitle = { Proc. 32nd Gocad Meeting, Nancy },
      year = { 2012 },
  abstract = { Hydraulic fracturing induces microseismicity due to fluid pressure increase in the saturated porous medium. Part of this microseismicity is related to the propagation of the pressure front. The dynamic evolution of this fracture-triggering front gives information on the fracture network and can be used to calibrate the geometry and connectivity of a Discrete Fracture Network (dfn).
The suggested method consists in simulating an initial dfn and estimating the propagation of the pressure front using a fast marching method. We define an objective function evaluating the mismatch between the geometry of the triggering front for a 100 hour arrival time estimated from microseismic analysis and the geometry of the pressure front for a 100 hour arrival time estimated using a Fast-Marching computation. This misfit volume is then used to characterize the dfn quality. The methodology is applied to the Soultz-sous-Forˆts granitic geothermal heat exchanger (France). }
}