Data for: Combined Effects of Temperature, Surface Roughness and Fluid Pressurization Rate on Injection-induced Shear Slip of Laboratory Faults
Description
The datasets archived here act as supplementary material to the study entitled by ‘Combined Effects of Temperature, Surface Roughness and Fluid Pressurization Rate on Injection-induced Shear Slip of Laboratory Faults’ by Nao Shen, Lei Wang* and Xiaochun Li. This study has been submitted to the Journal of Geophysical Research: Solid Earth for potential publication. The datasets contain 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) and fluid pressurization rates (0.1 MPa/min and 0.5 MPa/min, respectively). In addition to the ten 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 files with names from ‘Sample_SC1’ to 'Sample_SC5' provide the data of five fluid injection experiments into five saw-cut fractures while the dataset files with names from ‘Sample_T1’ to 'Sample_T5' correspond to the data of five fluid injection experiments into five tensile fractures. In each fluid injection experiment, shear stress, friction coefficient, shear slip displacement, slip velocity, effective normal stress, fluid pressure, mean normal deformation, fluid volume injected and temperature are listed as a function of time with a sampling rate of 10 Hz. The 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 ‘Velocity_Stepping_Tests’ provides the RSF parameters (a, b, Dc) at different confining pressures and temperatures.