Laboratory simulation of binary and triple well EGS in large granite blocks using AE events for drilling guidance

- Multi-well laboratory experiments show challenges for EGS in granite.
- We observe the influence of natural discontinuities on AE and fracture geometry.
- Fracture location estimation with AE improved by correlation with pressure drops.
- We measure hydro-thermal fluid flow through hydraulic fracture networks.
- Injectivity was more stable with constant pressure control than constant flow rate.