Cubic-meter scale laboratory fault re-activation experiments to improve the understanding of induced seismicity risks.

ABSTRACT: To understand fluid induced seismicity, we have designed a large-scale laboratory experiment consisting of a one-cubic-meter sandstone with an artificial fault cut and fluid-injection boreholes. The sandstone block is assembled in a true triaxial loading frame and equipped with 38 piezoelectric sensors to locate and characterise acoustic emission events. The differential stress on the artificial fault is increased in stages to bring it towards a critically stressed state. After each stage of differential stress increase, fluids are injected at low pressures through boreholes to test the potential of fault re-activation. In addition, a high-pressure injection was conducted that created a hydraulic fracture from the injection borehole towards the artificial fault. The newly generated fluid p

SUBMITTER: Oye V 

PROVIDER: S-EPMC9108097 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature