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Keywords: effective stress
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0123
... ABSTRACT: During production from gas reservoirs the formation pressure decreases, leading to increased levels of effective stress. As a result, the reservoir rock is compressed and deformed, leading to displacement of overlaying formations, which can propagate all the way to the ground...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0113
... ABSTRACT: Fractures shows strong stress sensitivity when the effective stress changes. Oil production causes the decrease of pore pressure and then leads to the change in subsurface stress. Re-open or closure of fractures bears significant influence on the fluid flow and oil production. The...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0069
... state of effective stress and modeled permeability with depletion. Reservoirs with narrower cleats indicated the exact opposite. These results clearly demonstrate the importance of geologic/reservoir assessment prior to selecting a reservoir for biogenic treatment. Reservoirs with a large distribution...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0226
... Effective Stress, b) an exponential relationship between the uniaxial-strain compressibility C m and the Apparent Cohesion, and c) a polynomial relationship between the horizontal depletion path constant ? h and the Apparent Cohesion. The correlations reveal two distinct types of constitutive behavior...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0352
... in effective stress, they argued that with depletion, effective stress would increase and that would decrease the effective pore size and this was done manually to fit the permeability values at each point. We argue that if pore size is changing due to increased effective stress, it should be a part...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0379
... ABSTRACT: The injection of fluids into a compartmentalized formation induces pore pressure buildup and decreases the local effective stress. Such changes of effective stress may result in re-activation of sealing faults. Variables that affect the amount of pore pressure change include the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0477
... loss rate creep law effective stress power law Reservoir Characterization cavern deviatoric stress MPa salt cavern Rock Mech constitutive law strain rate Bérest 1. INTRODUCTION A uniaxial formulation of salt behavior can be written: / = + th ss tE T (contractions and...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1930
... dependent to the applied Terzaghi effective stress whereas the calculated value for unjacketed bulk modulus was constant over the range of applied confining pressures. Furthermore, progressive rock failure characteristics under deviatoric compression were also found to be dependent to effective stress paths...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2008
... propagation (opening, crossing and arresting). Upstream Oil & Gas natural fracture effective stress complex reservoir cohesive zone model interface element hydraulic fracturing hydraulic fracture propagation fracture energy fracture hydraulic fracture Artificial Intelligence open...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2011
... vertical and horizontal stresses is higher. Dissociation of the gas hydrates lowers Yong's modulus at the gas hydrate layer (sand layer), which induces substantial subsidence near the well. The effective stress increases significantly, too, which may result in geological failure and potential wellbore...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2180
... ABSTRACT: The stress-dependent fracture permeability plays a vital role in shale reservoir drilling and hydrocarbon production process. An undesired change of fracture permeability under varying effective stress can induce serious safe and financial problems, such as lost circulation and...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2132
... coal seam gas coalbed methane flow in porous media pore pressure co 2 MPa saturation permeability adsorption phase transition permeability evolution supercritical state pressure increase Upstream Oil & Gas scco 2 experiment effective stress Fluid Dynamics evolution critical point...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2166
... vertical stress stress level reservoir geomechanics compression curve Porosity profile overpressure vertical effective stress Reservoir Characterization critical taper equation porosity effective stress vertical stress friction angle 1 1. INTRODUCTION Tectonic compression from convergence...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1601
... caprock poroelastic sustainability hydraulic fracturing Reservoir Characterization fracture aperture Fluid Dynamics Terzaghi injection pressure normalized pressure evolution permeability effective stress fracture hydraulic fracture Biot coefficient reservoir rock maximum fracture aperture...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0516
... ABSTRACT: The poroelastic effect on deep buried shale is of high interest and value for evaluating coupled effects of rock deformation and pore pressure change during oil/gas field operations. The concept of Biot’s effective stress law has been proved to be very useful in describing the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1568
... between gas molecules and solid surfaces is more frequent than the collision between gas molecules. This effect causes the increase of apparent permeability (i.e., the measured permeability). In this study, the simple effective stress law and the effective stress coefficient law were used to study the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1579
..., because of the increasing stress ratio. At the same time, however, sediments are weaker and closer to failure, because the slope of the critical state line decreases and sediments fail at a lower ratio of shear to mean effective stress. Overall, incorporating this fundamentally different material behavior...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1668
... ABSTRACT: In this research, a numerical modeling approach, combining the Discrete Element Method (DEM) with lattice Boltzmann (LB) method, was adopted to investigate the potential effects of mixed proppant sizes on fracture conductivity. DEM was used to simulate effective stress increase and...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1769
... caused by fluid injection, production, thermal, and chemical changes. This state of stress also controls failure of the casing, such as by externally driven crushing or internally driven rupture. The first step in determining this state of stress is to estimate the effective stress exerted by the cement...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1848
... deformation as well as the evolution of effectives stress at the fault plane. Reservoir Characterization Upstream Oil & Gas fluid injection simulator Modeling & Simulation Fault Activation mfm method reservoir geomechanics drillstem/well testing pressure change assumption...

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