Toward fracture porosity assessment by gravity forward modeling for geothermal exploration (Sankt Gallen, Switzerland)

Toward fracture porosity assessment by gravity forward modeling for geothermal exploration (Sankt... •Stripping gravity effect of irrelevant structures allows fracture porosity assessment.•Synthetic cases reveal that fault geometry must be well constrained for stripping.•The validity of the approach was tested down to about 4500m.•Density variation suggests about 4–8% fracture porosity in the Sankt Gallen fault zone.•High fracture porosity has been confirmed qualitatively by the first well GT-1. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geothermics Elsevier

Toward fracture porosity assessment by gravity forward modeling for geothermal exploration (Sankt Gallen, Switzerland)

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier Ltd
ISSN
0375-6505
eISSN
1879-3576
D.O.I.
10.1016/j.geothermics.2015.05.006
Publisher site
See Article on Publisher Site

Abstract

•Stripping gravity effect of irrelevant structures allows fracture porosity assessment.•Synthetic cases reveal that fault geometry must be well constrained for stripping.•The validity of the approach was tested down to about 4500m.•Density variation suggests about 4–8% fracture porosity in the Sankt Gallen fault zone.•High fracture porosity has been confirmed qualitatively by the first well GT-1.

Journal

GeothermicsElsevier

Published: Sep 1, 2015

References

  • Conjugate shear zones in the Southern Bohemian Massif (Austria): implications for Variscan and Alpine tectonothermal activity
    Brandmayr, M.; Dallmeyer, R.D.; Handler, R.; Wallbrecher, E.
  • Late orogenic carboniferous extensions in the Variscan French Massif Central
    Faure, M.
  • Integration of 3D geological modeling and gravity surveys for geothermal prospection in an Alpine region
    Guglielmetti, L.; Comina, C.; Abdelfettah, Y.; Schill, E.; Mandrone, G.
  • Early Tertiary evolution of the North Alpine Foreland Basin of the Swiss Alps and adjoining areas
    Kempf, O.; Pfiffner, A.
  • Post-Eocene evolution of the North Alpine Foreland Basin and its response to Alpine tectonics
    Kuhlemann, J.; Kempf, O.
  • Unravelling the multi-stage burial history of the Swiss Molasse Basin: integration of apatite fission track, vitrinite reflectance and biomarker isomerisation analysis
    Mazurek, M.; Hurford, A.J.; Leu, W.

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