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Keywords: internal pressure
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1994
... lifespan structural geology creep strain evacuation upstream oil & gas rock salt casing integrity mud drop partial evacuation symposium internal pressure creep rate creep deformation deformation sensitivity analysis wellbore lifespan full evacuation wellbore salt rock ARMA 21 1994...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0124
... stress distribution fracture element propagation Staudtmeister fracture internal pressure 1. INTRODUCTION The increasing demand of energy and the liberalization of the energy markets have led to more flexible storage options, characterized by high-frequency cycles and high withdrawal rates...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0262
.... And the water hammer effect is most obvious in a triangle crack, followed by a semi-ellipse and rectangular crack. equation of state water pressure crack tip rock mass Upstream Oil & Gas MPa water hammer effect internal pressure rectangular crack pressure water fluid modeling triangle...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1590
... distribution are discussed and analyzed in a numerical way. The results show that the unstable gas extraction/injection rate and frequent gas injection/extraction are not conducive to the stability of UGS. By comparing with the simulated results of the constant average internal pressure, it is shown...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-938
... cavern wall thermo-mechanical influence internal pressure case 2 calculation operation Staudtmeister vertical stress 1. INDRUDUCTION In recent years the number of gas storage caverns in Germany has risen strongly. The total storage capacity is approx. 24 billion cubic meters of working gas...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-099
... difference method (Flac2D) has been applied to study a cavity under pressure and high temperature. The cavity was previously introduced by borehole mining. The impact of different internal pressures and temperatures on the cavity roof and wall is numerically modeled. It was concluded that increasing internal...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1267
..., the highest stress is located at the direction of the minimum principal in-situ stress. The circumferential tensile failure of cement sheath owing to the high casing internal pressure occurs firstly at the inner wall of cement sheath. When casing is off-centered in the wells, stress concentration occurs...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-253
... excavation ground response curve strain rate internal pressure deformation determination gravity effect equation hedayat 1. INTRODUCTION In order to characterize the stresses and displacements around an excavation, it is necessary to understand the behavior of the rock mass around the tunnel...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-647
..., size, and distance to the wellbore) and internal pressure values. Finite element model generation follows through templates developed specially for this problem. The results of the simulations point out the most relevant parameters and the critical scenarios. The experience gained in this work...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-521
... storage cavern Upstream Oil & Gas interlayer Operating Pressure shrinkage deformation salt rock MPa internal pressure gas storage mechanics displacement lower limit upper limit gradient *Corresponding author: xlshi@whrsm.ac.cn (Xilin Shi); hlma@whrsm.ac.cn (Hongling Ma) ARMA 18 521...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0867
... radial crack apparatus internal pressure loading national energy technology laboratory integrity united states government MPa analytical model well system 1. INTRODUCTION Preventing the vertical flow of formation fluids is necessary for maintaining an efficient, cost-effective well operation...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0580
... deformations is recommended. The analyses were carried out with an in-house finite element simulator, GeoFlux3D, and have highlighted the wellbore casing sensitivity to the internal pressure and to the channels in the cement sheath. Plastic deformation has not been detected; however, the full evacuation...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0873
... pressure specimen Symposium different injection rate higher injection rate initiation opalinus clay shale fracture Upstream Oil & Gas fracture speed MPa Injection Rate bedding plane slowest injection rate experiment flaw internal pressure deformation 1. INTRODUCTION AND BACKGROUND...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-647
... geomechanics criterion stability ground response curve tunnel Wellbore Design equation support pressure gravity loading hb failure criterion circular tunnel internal pressure strain rate 1. INTRODUCTION Determination of the stresses and displacements around circular openings has been one...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-746
... plays an important role. Furthermore, using the DIC measurements, it was found that fracture initiates at 80% of peak internal pressure for the rock tested. 1. INTRODUCTION The expansion of a circular cavity, such as a production well in rock, has been of considerable interest for decades. However...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-075
...), on the induced maximum principal stress and differential principal stress. Largest principal stress is considered one of the key factors to initiate fractures in the rock. It was observed that increasing internal pressure, borehole radius, and K will significantly increase the induced maximum principal stress...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-161
... Abstract A parametric analysis comparing the influence of different factors on predicted induced principal stress around the cavity roof was performed. A finite difference method (Flac2D) was applied to study a cavity under internal pressure. The influence of internal pressure, cavity...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-279
... fracture height fracture array fracture interaction internal pressure displacement discontinuity method accuracy correction factor 1. INTRODUCTION In recent years, production of tight oil and shale gas has increased exponentially in the United States. Multiple fracture treatments in horizontal...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7433
... numerically modeled. The research is focused on the effect of critical factors associated with the mining process on the largest principal stress in the rock (around the cavity roof). The goal was to observe the effect of cavity dimension, internal pressure (cavity pressurization), K (horizontal stress...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-369
... geological sequestration Reservoir Characterization Upstream Oil & Gas composite cylinder system casing and cementing formation end contact pressure application external pressure temperature decrease tangential stress pressure increase safety factor internal pressure MPa tensile radial...

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