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Keywords: hydraulic aperture
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1124
... predictive estimation of fracture permeability after slip. The proposed relations link fracture length, shear displacement, fracture apertures, hydraulic apertures, and fracture permeability. We consider both fracture creation and the re-activation of existing fractures that have been infilled by minerals...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0393
... attributed to chemical processes such as pressure solution, and the mechanisms should be further examined. Upstream Oil & Gas variation MPa hydraulic aperture flow in porous media Fluid Dynamics single fracture different temperature surface roughness Yasuhara hydraulic fracturing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1829
... of these as a function of confining stress and/or shear displacement. The maximum confining stress for this system is 35 MPa. Permeability (k) and effective hydraulic aperture (bh) are two ways to express hydraulic conductivity. We measure these from pressure and flow rates via the following relationships (Boussinesq...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1691
... extent. The results indicate that the fracture hydraulic conductivity decreases with time. Increasing the confining pressure or flowrate or surface roughness leads to greater hydraulic aperture reduction. Also, the effect of mechanical compression on specimen (the fracture and rock matrix) creep...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0490
... Artificial Intelligence displacement stress state seismicity reservoir geomechanics friction Earthquake fluid flow hydraulic fracturing hydraulic aperture shear strength Simulation Schultz fault movement reservoir stimulation Reservoir Characterization Upstream Oil & Gas fluid injection...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0181
...-induced dilation, thermoelasticity as well as chemistry of hot dry rocks. A coupled thermal-hydro-mechanical-chemistry model was developed to analyze the composition of the total hydraulic aperture and primary role in different fracture section. The result shows that thermal effect plays a major role...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-439
... reservoir aperture discontinuity Fluid Dynamics fluid pressure permeability value fluid flow cavity formulation mahabadi rock mass aperture value finite element Flow Channel hydraulic aperture fracture flow in porous media geothermal reservoir Simulation Grasselli hydraulic fracture...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-285
... strain and flow measurement indicates that both mechanical and hydraulic aperture reduction varies linearly with the natural logarithm of effective normal stress. These stress-sensitive single-fracture laboratory observations are upscaled to models of fracture populations displaying frequency-length...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-560
... simulator Artificial Intelligence Fluid Dynamics grid block triangle permeability multiplier MDEM Timestep coupling mass balance discontinuity displacement discontinuity fracture reservoir geomechanics Upstream Oil & Gas Simulation porosity proceedings hydraulic aperture permeability...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-013
... hydraulic fracturing Engineering adaptive mesh refinement fracture mechanics ring mesh hydraulic aperture equation permeability aperture Latham interaction deformation 1 1. INTRODUCTION Deformation, fragmentation, and fracturing is a common cause of weakness in rocks due to natural...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-084
... the relationship among stress, pressure, deformation and rupture growth. hydraulic aperture reservoir geomechanics aperture equilibrium normal stress injection pressure variation reservoir characterization hydraulic fracturing fluid flow fluid pressure shear stress rupture growth jog upstream...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-121
..., and potential enhanced permeability through stimulation of the natural fractures. fracture conductivity complex reservoir normal stress hydraulic aperture fracture natural fracture permeability conductivity stress anisotropy fluid pressure upstream oil & gas hydraulic fracturing simulation...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-294
... flow results in terms of the hydraulic aperture of microannuli as a function of confining pressure and internal pressure for two different types of microannuli. Hydraulic apertures decrease non-linearly with increasing stress across the microannuli in a manner similar to fractures in rocks and other...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-189
... surfaces (hydraulic aperture) that will allow passing of the same volume of water flow through real joints. Roughness on rock joints produces variable aperture across the joints and increases the flow path length. These facts affect water flow within rock joints. Therefore, the validity of cubic law...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-514
... constraint the spread of the grout must be controlled by optimizing the grouting strategy. This paper describes how the project met these constraints by: characterizing the fracture flow system prior to start of excavation work, establishing correlations between predicted hydraulic aperture and grout takes...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-638
... hydraulic aperture deformation 1. INTRODUCTION Alteration of fracture permeability is important to a number of problems such as CO2 sequestration, enhanced oil recovery, nuclear waste isolation and geothermal energy production. Studies have targeted different mechanisms responsible for fracture aperture...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-469
... ABSTRACT: Coupled hydro-mechanical-chemical experiments were conducted to study the hydraulic aperture and water-rock dissolution of granite. The granite specimens used in the experiments were from the potential site for high level nuclear waste disposal in Beishan, Gansu province, China...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-337
...) or of a group of channels (fracture network). In this case the flow cross section is represented only by the fracture void areas (excluding the surrounding matrix area).Thus for determining fracture transmissvity, it would be more correct to consider a hydraulic aperture variation coefficient. In a simplified...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-570
... using the ratio of mechanically-to-chemically-controlled dissolved mass fluxes and compare it to the effective hydraulic aperture velocity. The transition value of unity for the mass flux ratio logically coincides with a predicted net effective hydraulic aperture velocity that asymptotes to zero...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-399
... to the low shale permeability was negligible. Within the PFC model, if the contact between two particles is broken, finite permeability, , develops. This is approximated by assuming single phase, parallel plate flow (lubrication equation): 2 12 a a 4) where a is the hydraulic aperture of the contact...

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