Schmidt, PatrickSteeb, HolgerRenner, Jörg2024-11-052024-11-0520231420-91360033-45531909357294http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-152069http://elib.uni-stuttgart.de/handle/11682/15206http://dx.doi.org/10.18419/opus-15187Hydro-mechanically induced transient changes in fracture volume elude an analysis of pressure and flow rate transients by conventional diffusion-based models. We used a previously developed fully coupled, inherently non-linear numerical simulation model to demonstrate that harmonic hydraulic excitation of fractures leads to systematic overtones in the response spectrum that can thus be used as a diagnostic criterion for hydro-mechanical interaction. The examination of response spectra, obtained from harmonic testing at four different field sites, for the occurrence of overtones confirmed their potential for the hydro-mechanical characterization of tested reservoirs. A non-dimensional analysis identified relative aperture change as the critical system parameter.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/550article2024-10-10