Hydraulic stimulation in an enhanced geothermal reservoir (EGS) often creates a complex
fracture network. It is understood that a fracture network includes both preexisting natural …

Multi-stage hydraulic stimulation experiments were conducted at the Bedretto Geothermal
Testbed (Switzerland) at a depth of over 1 km to study seismo-hydromechanical processes …

Preexisting discontinuities, such as joints and beddings, are widely distributed in
unconventional reservoirs. During fluid injection, hydraulic fractures strongly interact with …

The hydraulic fracturing technique (also termed mini-frac test) is commonly used to estimate
the in situ stress field. We recently conducted a mini-frac stress measurement campaign in …

This paper addresses hydraulic fracture initiation from an initially notch-free wellbore
situated in an anisotropic host rock, where the rock mass is subjected to an in-situ stress …

Abstract In URTeC-123-2019, a group of operators and service companies presented a step-
by-step procedure for interpretation of diagnostic fracture injection tests (DFITs). The …

This study reviews methods for detecting fracture closure pressure in both unconventional
and conventional reservoirs using mathematical models and fluid flow equations. It …

Based on the observation of past EGS projects, it is suggested that hydraulic stimulation
created a complex fracture network including both preexisting fractures and newly formed …

In an underground repository for high-level radioactive waste disposal, fracture
transmissivity in an excavation damaged zone (EDZ) along tunnels or deposition holes can …

The measurement of the stress field and its natural heterogeneity is a common challenge in
the field of geophysics and underground engineering. This study presents findings from an …