DOI: 10.5061/dryad.9kd51c5sp
title: Data from: Reservoir in-situ stress state determined by retrieved granite cores from the Gonghe enhanced geothermal system and its implications, northeastern Tibetan Plateau, China

description: Enhanced geothermal systems (EGS) utilize hydraulic fracturing technology
 to create high permeability fracture networks in stress-anisotropy
 reservoirs. We recovered 16 granite cores from the Gonghe EGS, China, and
 estimated the stress state using the anelastic strain recovery (ASR)
 method. We show that the stress regimes in 1700–4000 m are strike-slip and
 thrust faulting, indicating that horizontal force dominates. The SHmax
 magnitudes of the reservoirs are not high, much lower than the
 Byerlee's limit domain ( =0.6–0.85). We infer that weak-friction
 minerals in fractures lead to this low-level critical stress state. The
 borehole failure indicators show that the SHmax orientations are NE35°
 11°. The ongoing northeast expansion of the Tibetan Plateau is the
 first-order controlling factor for this stress state. Due to the proximity
 between Shmin and Sv, microseismic events during stimulation significantly
 migrate upwards. The focal mechanism of hydraulic-induced events provides
 direct evidence that our stress data is reliable.
description: # Data from: Reservoir in-situ stress state determined by retrieved
 granite cores from the Gonghe enhanced geothermal system and its
 implications, northeastern Tibetan Plateau, China Chongyuan Zhang, Weiren
 Lin, Derek Elsworth, Wen Meng, Dongsheng Sun, Manchao He, Shian Zhang,
 Jiading Xu, Zijuan Hu, Zhen Zhao, Lin Sun, Hao Zhang. Reservoir in-situ
 stress state determined by retrieved granite cores from the Gonghe
 enhanced geothermal system and its implications, northeastern Tibetan
 Plateau, China. Geophysical Research Letters. ## Data of the ASR stress
 measurement and moment tensor solution of M&gt;1 in the Gonghe EGS
 \[[https://doi.org/10.5061/dryad.9kd51c5sp](https://doi.org/10.5061/dryad.9kd51c5sp)] We have submitted our raw data of the ASR stress measurement(DataS1.zip) and monitoring data of moment tensor solutions for partially induced microseismic (magnitude ML &gt; 1) (Moment tensor solution of M＞1.xlsx) in the Gonghe EGS. Authors Chongyuan Zhang Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, 100081, China School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [zhchongyuan@126.com](mailto:zhchongyuan@126.com) Weiren Lin Graduate School of Engineering, Kyoto University, Kyoto, 615-8540, Japan [hayashi.tameto.6s@kyoto-u.ac.jp](mailto:hayashi.tameto.6s@kyoto-u.ac.jp) Derek Elsworth Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center, the Pennsylvania State University, PA, 16802, USA Department of Geosciences, the Pennsylvania State University, PA, 16802, USA [elsworth@psu.edu](mailto:elsworth@psu.edu) Wen Meng Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [mwen19@sina.com](mailto:mwen19@sina.com) Dongsheng Sun Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [dongshengsun@cags.ac.cn](mailto:dongshengsun@cags.ac.cn) Manchao He School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China [hemanchao@263.net](mailto:hemanchao@263.net) Shian Zhang Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [shianzhangcags@live.com](mailto:shianzhangcags@live.com) Jiading Xu Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [jdingxu@126.com](mailto:jdingxu@126.com) Zijuan Hu Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China [hzijuan@126.com](mailto:hzijuan@126.com) Zhen Zhao Qinghai Provincial Bureau of Environmental Geology, Xining, 810001, China [zhaozhen906@126.com](mailto:zhaozhen906@126.com) Lin Sun College of Civil Engineering, Anhui Jianzhu University, Hefei, 230601, China [linsun0828@126.com](mailto:linsun0828@126.com) Hao Zhang Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China Technology Innovation Center for In-situ Stress, Ministry of Natural Resources, Beijing 100081, China [zhhao@cags.ac.cn](mailto:zhhao@cags.ac.cn) ## Descriptions Files found within Data_S1.zip ASR-1.xlsx ASR-2.xlsx ASR-3.xlsx ASR-4.xlsx ASR-5.xlsx ASR-6.xlsx ASR-7.xlsx ASR-8.xlsx ASR-9.xlsx ASR-10.xlsx ASR-11.xlsx ASR-12.xlsx ASR-13.xlsx ASR-14.xlsx ASR-15.xlsx ASR-16.xlsx *Number: Experimental data number *Time(min)/Time(hour): Experimental time of different units *Temp(degree): Experimental temperature *strain X/Y/Z/XY/-XY/YZ/-YZ/ZX/-ZX: Anelastic strain recovery with time elapsing of core samples *strain ε1/ε2/ε3: Three-dimensional principal anelastic strains *strain εm: Mean constant strain File description The column-wise data included in ASR-#.xlsx (# is 1 to 16) are as follows: Number (column 1), Time (min) (column 2), Time (hour) (column 3), Temp (degreeC) (column 4), strain X (column 5), strain Y (column 6), strain Z (column 7), strain XY (column 8), strain -XY (column 9), strain YZ (column 10), strain -YZ (column 11), strain ZX (column 12), strain -ZX (column 13), strain ε1 (column 14), strain ε2 (column 15), strain ε3 (column 16), strain εm (column 18) Zhang_et_al_2024_ASR-1.xlsx – data for Experiment ASR-1 (depth of 1691.11m). Zhang_et_al_2024_ASR-2.xlsx – data for Experiment ASR-1 (depth of 1691.27m). Zhang_et_al_2024_ASR-3.xlsx – data for Experiment ASR-1 (depth of 2610.5m). Zhang_et_al_2024_ASR-4.xlsx – data for Experiment ASR-1 (depth of 2610.7m). Zhang_et_al_2024_ASR-5.xlsx – data for Experiment ASR-1 (depth of 3045.9m). Zhang_et_al_2024_ASR-6.xlsx – data for Experiment ASR-1 (depth of 3046.1m). Zhang_et_al_2024_ASR-7.xlsx – data for Experiment ASR-1 (depth of 3046.2m). Zhang_et_al_2024_ASR-8.xlsx – data for Experiment ASR-1 (depth of 3142.09m). Zhang_et_al_2024_ASR-9.xlsx – data for Experiment ASR-1 (depth of 3142.21m). Zhang_et_al_2024_ASR-10.xlsx – data for Experiment ASR-1 (depth of 3142.39m). Zhang_et_al_2024_ASR-11.xlsx – data for Experiment ASR-1 (depth of 3210.79m). Zhang_et_al_2024_ASR-12.xlsx – data for Experiment ASR-1 (depth of 3529.57m). Zhang_et_al_2024_ASR-13.xlsx – data for Experiment ASR-1 (depth of 3804.11m). Zhang_et_al_2024_ASR-14.xlsx – data for Experiment ASR-1 (depth of 3883.06m). Zhang_et_al_2024_ASR-15.xlsx – data for Experiment ASR-1 (depth of 3883.12m). Zhang_et_al_2024_ASR-16.xlsx – data for Experiment ASR-1 (depth of 3980.35m). Note: The values given in red color from ASR-1 to ASR-16 file, represent the negative strain values. Furthermore, they represent compressive strain. Due to the rarity of such compressive strains, we display them in red font. Moment tensor solution of M&gt;1.xlsx *No: Monitoring number of moment tensor solutions for induced microseismic (magnitude ML &gt; 1) *Date (yymmdd): Monitoring date (date format) *Time (hhmmss): Monitoring time (time format) *North/East (m): The northward/eastward component of the seismic moment tensor(m) *Depth(m): Depth of earthquake (m) *Magnitude (ML): The magnitude of an earthquake, an indicator for measuring the size of an earthquake *Nodal plane I strike (°): Angle of approach to the node plane I, the angle with due north direction *Nodal plane I dip (°): Dip angle of the nodal plane I, i.e. the angle between the fault and the horizontal plane *Nodal plane I rake (°): Slip angle i of the nodal plane I, i.e. the direction of slip of the relative movement of hanging wall and footwall *Nodal plane II strike (°): Angle of approach to the node plane II, i.e. the angle with due north direction *Nodal plane II dip (°): Dip angle of the nodal plane II, i.e. the angle between the fault and the horizontal plane *Nodal plane II rake (°): Slip angle i of the nodal plane II, i.e. the direction of slip of the relative movement of hanging wall and footwall *P-axis azimuth (°): The azimuth of the P-axis (principal compressive stress axis), describes the angle between the horizontal projection of the P-axis and the due north direction *P-axis dip (°): Dip of the P-axis, i.e. the angle between the P-axis and the horizontal plane *B-axis azimuth (°): The azimuth angle of the B-axis (back stress axis or neutral axis) *B-axis dip (°):Dip of the B-axis, i.e. the angle between the B-axis and the horizontal plane *T-axis azimuth (°):Azimuth of T-axis (axis of tensile stress) *T-axis dip (°):Dip of the T-axis, i.e. the angle between the T-axis and the horizontal plane *Stress regime: The state of stress in the region where the earthquake occurred, such as strike slip (SS), thrust faulting (TF) and uplift dominated (UD) Moment tensor solution of M&gt;1.xlsx, column-wise data description – No (column 1), Date (yymmdd) (column 2), Time (hhmmss) (column 3), North(m) (column 4), East(m) (column 5), Depth(m) (column 6), Magnitude (ML) (column 7), Nodal plane I strike (°) (column 8), Nodal plane I dip (°) (column 9), Nodal plane I rake (°) (column 10), Nodal plane II strike (°) (column 11), Nodal plane II dip (°) (column 12), Nodal plane II rake (°) (column 13), P-axis azimuth (°) (column 14), P-axis dip (°) (column 15), B-axis azimuth (°) (column 16), B-axis dip (°) (column 18), T-axis azimuth (°) (column 19), T-axis dip (°) (column 20), Stress regime (column 20) data for moment tensor solution of M&gt;1.