Abstract
We investigated the rate-and-state frictional properties of simulated anhydrite-carbonate fault gouge derived from the basal Zechstein caprock overlying the seismogenic Groningen gas reservoir in the NE Netherlands. Direct shear experiments were performed at in situ conditions of 50–150 °C and 40-MPa effective normal stress, using sliding velocities of 0.1–10 μm/s. Reservoir pore
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