Experimental data of fluid injection-induced shear slip on fractured sandstone samples at varying temperatures

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.

本存档数据集为沈娜（Nao Shen）、王磊（Lei Wang）*、李晓春（Xiaochun Li）以及格奥尔格·德雷森（Georg Dresen）所撰写的题为《温度与表面粗糙度对砂岩裂隙流体注入诱导剪切滑移的影响》的研究论文提供补充材料。该研究已提交至《Journal of Geophysical Research: Solid Earth》（地球物理研究杂志：固体地球）以待刊用。本数据集包含临界应力砂岩裂隙样品（实验室模拟断层）在不同表面粗糙度（锯切裂隙与张拉裂隙）、不同温度（分别为25℃、80℃与140℃）条件下开展的流体注入诱导剪切滑移实验结果。除完成6组流体注入实验外，本研究还通过速度步进实验，在有效正应力与温度可变的相似边界条件下，实验标定了速率状态摩擦（rate-and-state friction, RSF）参数。名为‘SampleSC1’的数据集文件对应25℃下锯切裂隙的流体注入实验数据；‘SampleSC2’对应80℃下锯切裂隙的流体注入实验数据；‘SampleSC3’对应140℃下锯切裂隙的流体注入实验数据。‘SampleT1’对应25℃下张拉裂隙的流体注入实验数据；‘SampleT2’对应80℃下张拉裂隙的流体注入实验数据；‘SampleT3’对应140℃下张拉裂隙的流体注入实验数据。每组流体注入实验中，均以10 Hz的采样率记录了随时间变化的剪切应力、摩擦系数、剪切滑移位移、滑移速度、有效正应力、流体压力、平均法向变形与注入流体体积。数据表中各列的定义已在数据对应表头中注明，各列的单位则列于第二行。名为‘VelocitySteppingTests’的数据集文件提供了不同围压与温度条件下的RSF参数（a、b、Dc）。