Experimental data of fluid injection-induced shear slip on fractured sandstone samples at varying temperatures
Description
The dataset archived here acts as supplementary material to the study entitled by ‘Effects of Temperature and Surface Roughness on Injection-induced Shear Slip of Sandstone Fractures’ by Nao Shen, Lei Wang*, Xiaochun Li, and Georg Dresen. This study has been submitted for publication in the Journal of Geophysical Research: Solid Earth. The dataset contains the experimental results of injection-induced shear slip experiments on critically-stressed fractured sandstone samples (laboratory-simulated faults) with different surface roughness (saw-cut vs. tensile fractures) at varying temperatures (25 ℃, 80 ℃, and 140 ℃, respectively). In addition to the six fluid injection experiments we performed, we also experimentally constrained the rate-and-state friction (RSF) parameters under similar boundary conditions of varying effective normal stresses and temperatures by performing velocity-stepping tests. The dataset file named by ‘SampleSC1’ provides the data of the fluid injection experiment into the saw-cut fracture at 25℃. The dataset file named by ‘SampleSC2’ provides the data of the fluid injection experiment into the saw-cut fracture at 80℃. The dataset file named by ‘SampleSC3’ provides the data of the fluid injection experiment into the saw-cut fracture at 140℃. The dataset file named by ‘SampleT1’ provides the data of the fluid injection experiment into the tensile fracture at 25℃. The dataset file named by ‘SampleT2’ provides the data of the fluid injection experiment into the tensile fracture at 80℃. The dataset file named by ‘SampleT3’ provides the data of the fluid injection experiment into the tensile fracture at 140℃. In each fluid injection experiment, shear stress, friction coefficient, shear slip displacement, slip velocity, effective normal stress, fluid pressure, mean normal deformation, and fluid volume injected are listed as a function of time with a sampling rate of 10 Hz. Definition of each column in the data tables is indicated in the corresponding header of the data. The unit for each column is shown in the second row. The dataset file named by ‘VelocitySteppingTests’ provides the RSF parameters (a, b, Dc) at different confining pressures and temperatures.