### Session L27: Minisymposium: The Fluid Dynamics of Geological CO2 Sequestration

3:35 PM–5:45 PM, Monday, November 21, 2011
Room: Ballroom I-II

Chair: Jerome Neufeld, University of Cambridge

Abstract ID: BAPS.2011.DFD.L27.2

### Abstract: L27.00002 : Monitoring pressure evolution during geological CO$_2$ storage

4:01 PM–4:27 PM

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#### Author:

Marc Hesse
(Geological Sciences and Institute for Computational Science and Engineering, University of Texas at Austin, TX)

Pressure build-up near the injection well is a critical factor limiting injection rates during CO$_2$ storage and leads to measurable deformation at the surface above the injection site. The radial solutions for pressure and saturation in two-phase compressible flow are self-similar and they illustrate that the pressure outside the two- phase region is comparable to single-phase flow. However, pressure dissipation into ambient rocks reduces lateral pressure propagation significantly. Pressure build-up also leads to surface deformation and provides a monitoring tool to invert for reservoir parameters. We formulate an inverse problem to infer the permeability distribution in a quasi-static poroelastic model. Here, we neglect two-phase flow and focus on pressure dissipation into ambient formations. The misfit between model and observations is minimized under the constraint of the poroelastic equations. A numerical study of injection into a deep layer illustrates the possibilities and limitations of retrieving lateral permeability variations from a coupled inversion.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DFD.L27.2