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Keywords: pore structure
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1743
... based on pore scale. The 2D geometric models of pore structure with different structural characteristics were generated by the quartet structure generation set (QSGS) and the generation algorithm of random granular porous media. The numerical simulation is conducted to investigate the effects...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0280
... ABSTRACT: Fracturing using liquid nitrogen (LN 2 ) has been successfully applied in coalbed methane reservoirs stimulation in field since the 1990s. However, the mechanism of LN 2 acting on the alteration of pore structure is still obscure. For moisture coal, the cryogenic treatment can...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0311
... ABSTRACT: In order to investigate the stress distribution characteristics and deformation failure law of micro-coal structure under loading, a digital model that can characterize the true pore structure of coal and rock mass is constructed by combining computed tomography (CT) scanning and 3D...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-641
... for the formation properties variation during the CO 2 flooding process, especially at the micro-scale. In this paper, a series of measurements of the rock mechanical and the pore structure properties were conducted before and after the supercritical CO 2 injection process. Corresponding to the time variation (0...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-786
... and energy than primary coals due to its unique physical properties. In this work, fractal analysis was conducted using N 2 sorption data to obtain pore structural parameters (i.e. fractal dimensions), and Langmuir's equation was applied to model gas sorption behavior from CH4 sortpion experiment...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-273
... to investigate the effect of cryogenic liquid nitrogen on the physical/mechanical properties of shale samples. Successively, the changes in shale brittleness, pore structure and fracture toughness were quantitatively evaluated by elastic parameters, acoustic velocity and tensile strength, respectively. Finally...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-300
... ABSTRACT: This contribution takes advantage of three multiscale imaging techniques to predict permeability from the actual 3D percolating pore structure of a natural claystone, planned in France for long term nuclear waste repository. These imaging techniques (micro-tomography i.e. micro-CT...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-318
... in coal mines. In this study, low pressure nitrogen adsorption and high pressure mercury intrusion porosimetry were employed to characterize pore structure of one fireclay and four coal mine shales. The results suggest that the porosity and specific surface area (SSA) for all five samples are dominated...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1048
... ABSTRACT: Due to low permeability, acid can hardly penetrate deep into the tight limestone, causing pore structure and mechanical property change on the surface of the rock. In this study, the porosity, permeability, and acoustic velocity of the tight limestone were first tested, followed...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0068
... ABSTRACT: Pore structure is one of the most important parameters affecting the properties of reservoir formations such as mechanical properties. The existence of the pores in the rocks will cause stress concentrations where isolated pores or cracks may nucleate favorably and crack growth...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0212
... ABSTRACT: To better understand the liquid nitrogen freezing effect on different rocks, shale, coal, sandstone and carbonate were chosen to investigate the pore structure and mechanical properties damage before and after liquid nitrogen freezing. Experimental study shows that an increase...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-899
... in the context of pore structure changes. 1 INTRODUCTION A Disturbed Rock Zone (DRZ) develops around the excavations of the Waste Isolation Pilot Plant (WIPP), a US Department of Energy research and development facility in bedded salt (halite) near Carlsbad, New Mexico. The DRZ has been defined as the zone...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0671
... of these porous materials. The extent of the compaction zone was found to be controlled largely by the porosity of the rock and the strength of its pore structure. The refractory brick specimens failed exclusively by pore collapse and consequently were used to visualize the development of the compacted zone...
Proceedings Papers

Paper presented at the The 11th U.S. Symposium on Rock Mechanics (USRMS), June 16–19, 1969
Paper Number: ARMA-69-0629
... ABSTRACT Efforts have been made for many years to observe pore structure of sedimentary rocks on a microscopic scale. A better description of the pore structure in reservoir rock would aid in the development of relations between flow through tube network models and flow in consolidated...

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