..., simultaneous hydraulic fracture stages, and sequential hydraulic fracture stages) on injection (net) pressure behavior is presented. The results were generated using a 2-D distinct element model and capture the important role that, for example, initial natural fracture aperture and in-situ pressure play...

...; Final Fracture Orientation: primarily determined by the far-field minimum in-situ stress; Transition to the Final Orientation: alignment to preferred final orientation occurs quicker at high injection rate. More significantly, the general pressure behavior of these tests is different from the breakdown...

... is altered. Reservoir Characterization reservoir geomechanics hydraulic fracturing Upstream Oil & Gas injection period pressure data overburden gradient Ekofisk pressure behavior reinjection operation operation disposal domain MPa Injection Rate shut-in pressure fracture gradient...

... or stoppage of work for days because of strikes or lack of demand for coal. Studies on pressure behavior were made during brief stoppages of work (few hours) as well as a long stoppage of work (two weeks). In dynamic conditions, the pressure variation on supports is expected to follow a certain pattern...