Data Publication

Fluid injection experiments on critically stressed sawcut faults in low-permeability granite samples

Yinlin, Ji | Wang, Lei | Hofmann, Hannes | Kwiatek, Grzegorz | Dresen, Georg

GFZ Data Services

(2022)

Descriptions

Earthquakes associated with fluid injection in various geo-energy settings, such as shale gas and deep geothermal energy, have shelved many projects with great potential. However, the injection-rate dependence of earthquake nucleation length, i.e., the slowly slipping (creeping) fault length in preparation for a subsequent earthquake (Kaneko & Lapusta, 2008), remains elusive. In this study, we take a step towards this issue by performing fluid injection experiments on low-permeability granite samples containing a critically stressed sawcut fault at different local injection rates (0.2 mL/min and 0.8 mL/min) and confining pressures (31 MPa and 61 MPa) (c. f., Ji & Wu, 2017; Wang et al., 2020). An array of local strain gauges and acoustic emission (AE) hypocenter locations were used to monitor the precursory slip of critically stressed faults before injection-induced stick-slip failure (c. f., Passelègue et al., 2020; Wang et al., 2020). The nucleation length was determined for each injection-induced stick-slip event, and its dependence on effective normal stress and injection rate was explored. Herein, we compile the processed data obtained from the experiments in four Excel worksheets. The full description of the methods is provided in Ji et al. (2022).

Keywords

Originally assigned keywords

Injection-induced seismicity

Injection rate

Earthquake nucleation length

Fluid injection

Hydraulic stimulation

Fault slip

EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS

geological process > seismic activity > earthquake

Corresponding MSL vocabulary keywords

induced seismicity model

tectonic fault

MSL enriched keywords

Models

field system model

induced seismicity model

tectonic deformation structure

tectonic fault

igneous rock - intrusive

acidic intrusive

granite

Apparatus

deformation testing

shear testing

conventional triaxial apparatus: saw-cut

Measured property

permeability

sedimentary rock

mudstone

shale

friction - controlled slip rate

rate and state friction (RSF) parameters

strain

acoustic emission (AE)

Measured property

friction - controlled slip rate

rate and state friction (RSF) parameters

strain

acoustic emission (AE)

subsurface energy production

geothermal energy extraction

deep geothermal energy

MSL enriched sub domains i

geo-energy test beds

rock and melt physics

analogue modelling of geologic processes

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=1caec3df-01c6-11ed-9531-ca1f3ed77ce8

Source publisher

GFZ Data Services