... experiment reservoir geomechanics creep response axial pressure step Faulkner creep strain ductile behavior lateral direction Upstream Oil & Gas differential stress step strain response differential stress Magnitude Shale gas Reservoir Rock deformation damage zone 1. INTRODUCTION...

... constitutive parameter intra-reservoir stress variation differential stress shale gas variation mechanical property horizontal stress difference complex reservoir Shale gas Reservoir Rock deformation Barnett shale strain response pressure step reservoir 1. INTRODUCTION Time-dependent mechanical...

... is 11m (seam k1 is 7m), the ratio between the thickness of immediate roof and the face-mining height in seam k3 is 4.6 (seam k1 is 2) the pressure step of upper roof in seam k3 is 27m (10m in seam k1). Having calculated the average value X, standard deviation S, and separate coefficient V of fissure...

... injection test fracture pressure step stress measurement tunnel 28th US Symposium on Rock Mechanics / Tucson/29 June- 1 July 198 7 A comparison f hydraulic fracturing and hydraulic jacking stress measurements T .Doe Golder As$ociate$, Redmond, Wash., USA G.E.Korbin Orinda, Calif., USA ABSTRACT...

... Upstream Oil & Gas undrained end fluid pressure flow in porous media pore pressure porosity pressure step mean normal stress Reservoir Characterization compressibility boundary condition sample permeability long-term stress-related drainage behavior equation sample end...

... A representative radial pressure distri- bution is displayed in Figure 2. The numbers refer to successive pressure steps. With increased central pressure and more open porosity the pore pressure gradient outside the central region falls away more steeply. 2.0 i , , ' 1'5 l 0'5F - I O 0 1 2 3 4 5 t RADIAL DISTANCE...