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Keywords: stress difference
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1917
... enhancement factor pore radius permeability stress sensitivity imbibition length matrix spontaneous imbibition nanopore stress difference pore length ARMA 21 1917 Microscale compressibility and nanoscale effects on shale reservoir fracturing fluid imbibition Han Wang, Wendong Wang, Yuliang Su...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1321
...: arresting, diverting, branching and crossing. Furthermore, hydraulic fractures tended to cross the weak plane and then connected with the adjacent layer under small vertical stress difference and large horizontal stress difference. In addition, Complex natural fracture network contributed to fracture...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1192
... properties of the rock near the excavation zone (Tsang et al., 2012). reservoir characterization microcrack contribution dilation directional damage reservoir geomechanics resistance damage growth stress state stress difference volumetric strain rock mechanics etna basalt mpa upstream...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2155
... in a single stage can significantly increase the fracture volume. Lower horizontal in-situ stress difference and higher natural fracture development density are helpful to improve the sweep volume of fracture network ;(2) When the horizontal in-situ stress difference is less than 0.10, the natural fractures...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2044
... calculate stress differences between two elastic anisotropic models and the isotropic assumption. Minimum horizontal stress estimations show high sensitivity to the anellipticity parameter Eta, defined from Thomsen's parameters Epsilon and Delta. For passive environments and low anellipticity, stress...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1322
... initial flaw fluid pressure circular wellbore inclination angle boundary condition stress difference upstream oil & gas dual boundary element method lubrication equation complex reservoir regime boundary element method fluid viscosity principal stress integral equation equation...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1645
... of mudstone is up to 11.456 MPa and the lowest tensile strength of coal is 0.296 MPa. The in-situ stress distribution of different layers on the vertical of the reservoir is obtained. which indicates that the maximum horizontal in-situ stress difference between layers reaches 7 MPa. The results give a deep...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2159
... is characterized by the cohesive zone model. Parametric studies have been carried out to unveil the effects of in-situ stress difference between the adjacent layers and the coal seam, the distance from the horizontal wellbore to the interface between the coal seam and the adjacent layer, the fracture energy...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1592
... of injection rate on hydraulic fracturing. The design of hydraulic fracturing should be based on rock s inherent property (elastic modulus, hardness, permeability and natural fracture, etc stress condition (stress difference, in-situ stress) and well completion condition (perforation orientation, perforation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1822
... are characterized by a wide distribution of inclination angle from 27° to 60° with the increasing horizontal stress difference, showing that it is less dominated by in-situ stresses. Branches are able to initiate and propagate at contacted fracture surface with local shear concentration. Shear stimulation can...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-492
... permeability reservoirs. flow in porous media strength reservoir geomechanics Fluid Dynamics hydraulic fracturing pore pressure experiment Fine Sandstone mechanism Reservoir Characterization Upstream Oil & Gas natural fracture stress difference hydraulic fracture water injection...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-327
... will change the direction of the new diverting cracks. (2) An evaluation model of fracture diverting ability is established, in which the main parameters are the inclination angle of artificial crack, in-situ stress difference, fracture toughness, and pore pressure. hydraulic fracturing fracture...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-917
... into three categories: fracture networks, branched fractures and a single fracture. The results show that the larger the size of natural fractures, the smaller the in-situ stress difference, the easier to form fracture networks when hydraulic fracturing. For natural fractures of any size, the fracturing...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-942
... cleats, cleats bonding strength and in-suit stress difference. The simulation results verify the initiation direction and the shape of hydraulic fracture propagation path are mainly controlled by coal cleats intersecting angle; the strength of coal cleats plane determined the complexity and propagation...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-057
... ABSTRACT: Six true tri-axial laboratory experiments were conducted to investigate fracture propagation behavior in tight formation. Meanwhile, the effects of perforation parameters on fracture initiation and propagation under different horizontal stress differences were discussed...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0250
... factors thought by most scholars just cause the cross-section of the casing smaller change, which do not block the bridge plugs pumped by elastic coiled tubing; b) influenced by in-situ stress, natural fractures tend to slip when the stress difference is large enough, and slippage is mostly likely...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-1012
... production stress difference fracture fracture surface stress change fracture geometry stress reorientation process permeability 1 1. INTRODUCTION During the past few decades, technology development of multistage hydraulic fracturing and horizontal drilling has significantly increased...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0050
..., and the fracture height is dominated by in-situ stress. Stress difference higher than 4MPa shows great effectiveness in fracture height containment. In addition, the result indicates that lower elastic modulus is favorable for fracture height containment while Possion’s ratio has almost no effect. Fracture...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0936
... model of sandstone-mudstone interbedding reservoirs taking into account the influences of in-situ stress difference, rock interface properties and construction parameters on the initiation and propagation mechanism of hydraulic fractures. The result shows that in-situ stress is the key factor...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-508
... to better understand the behavior of intermediate geomaterials and, specifically, time-dependent deformation, or creep. A series of long-duration (weeks to months) triaxial constant-stress-difference tests were performed on recently obtained core samples from the Pierre Shale. Samples were hydrostatically...

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