joint_transparent2.png
YouWol Geoscience Services
Nuclear waste disposal

Case study: Onkalo, Finland

References

  • Maerten, L., Soliva, R., Maerten, F. , Aaltonen, I., Wilkström, L. and Mattila, J., 2009, Fault Reactivation and Fault Properties - 3D Geomechanical Modeling Approach and Application to Nuclear Waste Disposal2nd International Conference on Fault and Top Seals – From Pore to Basin Scale Montpellier, France, 21-24.

  • Soliva, R., Maerten, F., Maerten, L. and Mattila, J., 2019, Fault slip envelope: a new parametric investigation tool for fault slip based on geomechanics and 3-D fault geometry. Solid Earth, 10 (4), 1141-1154.​

Context

  • Client: Posiva Oy

  • Location: Olkiluoto Island, Finland

  • Main goal: Model fault reactivation over time in a buried nuclear waste disposal area

  • Geology: Fractured gneisses

  • Tectonic: Glacial cycle

ONKALO-Posiva-Oy.jpg

Methodology

  1. Data analysis and interpretation

  2.  3D model building

    1. Multi-parametric models (Arch)

  3. Fault reactivation risk over time (Arch)

  4. 3D stress models over time (Arch)

case4_07.jpg

Other applications using similar methodology

This workflow for modeling fault reactivation can also be applied to:

  • Oil and gas production

  • Earthquake study

  • Geothermal energy

  • CO2/gas storage

  • Mining

Main outcomes