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Swiss Journal of Geosciences
Fig. 10 | Swiss Journal of Geosciences

Fig. 10

From: Hydro-mechanical evolution of the EDZ as transport path for radionuclides and gas: insights from the Mont Terri rock laboratory (Switzerland)

Fig. 10

Experimental evidence of sealing effects in Opalinus Clay at Mont Terri. Suggested hyperbolic relationship between interval transmissivity and effective normal stress, (σn−pi), based on the investigation of fracture closure mechanisms in the so-called Gasfrac self-sealing (GS) experiment (after Nagra 2002). Hydraulic tests were conducted for different interval pressure values, pi. The normal stress, σn (ca. 4.3 MPa), was derived from the shut-in pressure recorded during hydraulic fracturing

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