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Keywords: stability
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1193
... ABSTRACT: Gas wells drilled through coal seams may be influenced by underground coal mining, especially longwall mining. To evaluate the stability of gas wells in longwall chain pillars, NIOSH has developed numerical models to calculate longwall-induced ground pressure, subsurface movements...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1572
... Longmaxi shale gouges at high pressure and high temperature (HPHT) that probe the underlying mechanisms controlling injection-induced earthquakes. The frictional strength and stability properties of shale gouges were obtained via velocity-stepping experiments at a confining pressure of 60 MPa , pore...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1044
... ABSTRACT: The permeability characteristics of tailings are the basis of analyzing the stability of tailings dam. Particle size is an important factor affecting the permeability of tailings. This study carried out soil physical properties and permeability test for undisturbed samples obtained...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1631
... ABSTRACT: Openhole instability during drilling and production remains a serious problem in oil and gas industry. Previous research has almost exclusively focused on the stability of a circular borehole. It is well known that drilling operations and/or rock failure can often result...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1231
... of the backfill quality at the plant and improve backfill performance underground. Improved backfill quality will ensure long-term stope stability, improve safety, and reduce backfill operational costs. 1. Introduction Backfill is an important component of underground mining operations and is a critical part...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1315
... permeability, influences the stress state and fracture stability in the domain. A case study, inspired by a huff-n-puff tracer flowback study, is conducted to investigate the applicability of the proposed framework in the field. A sensitivity analysis is performed to evaluate the dependence of global transport...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1081
... management & disposal upstream oil & gas efficiency stability drag force circulation material drilling fluids and materials concentration particle cfd-dem simulation dynamic viscosity micro-plugging mechanism particle size distribution modeling & simulation hydrodynamic disturbance...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2097
... in underground natural gas storage, so there is very little research on its stability. In this paper, a geomechanical model for the stability evaluation of the double-well salt cavity gas storage is established, the stability analysis of the double-well salt cavity under different operating pressures is carried...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1180
... in urban area. The case study involves a few caverns constructed in jointed volcanic tuff at shallow depth and within a complex bifurcation scheme. Certainly, controlling ground settlement and maintaining ground stability are of importance in this situation. However, balance between maintaining public...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1203
... ABSTRACT: Large amounts of insoluble sediments formed in high impurity salt mines can inhibit the expansion of cavern bottom and can block or smash the debrining tubings during the gas injection and extraction process. However, these insoluble sediments are also conducive to the stability...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0013
... completion complex reservoir Longwall Mining US government inclinometer displacement shale gas well Upstream Oil & Gas gas well test site longwall-induced subsurface deformation permeability change permeability integrity mining panel mining abutment pillar stability shallow cover...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0126
... ABSTRACT: Special rock mechanical characteristics of natural gas hydrate (NGH) sediments lead to the inapplicability of traditional well stability models. In this paper, a new model to calculate the collapse pressure and fracture pressure of a borehole in NGH formation is studied based...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0237
... track. The optimization results can effectively guide the on-site construction and enhance and maintain the coalbed gas production. complex reservoir orientation multi-branch t-shaped well drilling encounter rate coal seam gas branch length Upstream Oil & Gas optimization stability...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0134
... ABSTRACT: As new development moves into the vicinity of large granite boulders, new factors including vibrational loads caused by construction equipment or seismic shaking, loss of downslope support, and human activity begin to play a role in the stability of precariously balanced boulders...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0276
... ABSTRACT: With the shale gas boom over the past decade, many shale gas wells have been drilled through the Pittsburgh coal seam to the Marcellus shale formation. The wells located in longwall barrier pillars are influenced by longwall mining, and their stability has been a safety concern...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0095
... ABSTRACT: Weathering makes the hard and compact rock loosely damaged, resulting in great reduction of rock's strength and stability, which has a negative impact on the engineering construction. Most of the unfavorable geological phenomena such as landslides, collapses, shatters and mudslides...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0011
... failure under reservoir depletion since its mechanical strength becomes weaker. This paper investigates the effects of wormhole geometry and rock strength weakening on wormhole stability by coupled hydro-chemo-mechanical simulation. The acidizing process is firstly simulated using in-house acidizing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0072
... ABSTRACT: The deformation stability and control theory based on viscoelastic, viscoplastic and viscodamage models is developed to simulate time-dependent deformation and quantitatively evaluate the long-term stability of gas storage caverns in salt rock. A quantitative criterion for the long...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0249
... diverge. Assumptions such as uniform fracture fluid pressure or homogeneous fracture conductivity leads to inaccurate solutions of proppant transport in the fractures. In this paper, we present a novel linearized predictor method to increase the speed and stability of solving the coupled fracture fluid...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0275
... of the valley. The rock mass properties and environmental conditions of the area were gathered from literature to conduct a preliminary stability assessment of the fractured cliff above the 18 th Dynasty tomb KV42 constructed for Hatshepsut-Meryet-Ra, the wife of Thutmose III, reused by a mayor of Thebes...

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