True-triaxial apparatus for simulation of hydraulically fractured multi-borehole hot dry rock reservoirs

Drilling and stimulation are instrumental tools for underground injection and extraction of fluids for geo-environmental applications (e.g., CO sub(2) geological sequestration) and energy extraction (e.g., oil, gas or geothermal energy production). These tools have been proven successful for both traditional high permeability reservoirs and unconventional low-permeability resources (e.g., shale-gas formations). However, current methods become increasingly challenging and unreliable when implemented in deeper, hotter and more difficult geological resources.