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Keywords: adsorption
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Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0360
... sector model to investigate the impact of the temperature-dependent fluid-rock interactions induced by sulfate adsorption on the surface of calcite grains on the deformation behavior of the reservoir during waterflooding. Our sector-scale simulation results show that while considering the geomechanics...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0336
... ABSTRACT: The use of molecular simulation to quantify gas adsorption and diffusion is needed to study the CO2 Enhanced Oil Recovery (EOR) efficiency. Favoring CO2-Oil interaction over CO2-Rock interaction depends on the strength of the interaction bond between CO2 and nanopores surface...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0464
... hydrocarbon production and CO 2 geological storage unique in these rocks. The objective of this paper is to quantify and model the deformational behavior of carbon-based compounds due to changes of stress and pressure that happen simultaneously with gas adsorption and desorption processes. We designed...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0050
..., respectively. Compared to aqueous-based fluids, scCO 2 can develop more complicated fracture networks, improve shale gas recovery by preferential adsorption behaviors of CO 2 over methane, reduce flow blockages and reduce water consumption (Zhou et al. 2020). For instance, a study on Yan-2011 shale gas by Li...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0653
... ABSTRACT: Accessible to inaccessible nanopore structure, distribution and complexity controls the storage, transport, and recovery of gas-shale. Fluid- (low-pressure N 2 and CO 2 adsorption) and radiation-based (small-angle scattering) methods used to characterize the connected...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0963
..., resulting in a certain degree of damage to reservoir permeability (Gray D. H et al, 1996, Wilson M. J ,2014, Q. Zhang et al, 2014, and AlMubarak T. A, 2015). upstream oil & gas precipitation carbonate reservoir xia adsorption carbonate reservoir enhanced recovery journal mineral...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2132
... gas coalbed methane flow in porous media pore pressure co 2 MPa saturation permeability adsorption phase transition permeability evolution supercritical state pressure increase Upstream Oil & Gas scco 2 experiment effective stress Fluid Dynamics evolution critical point...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0339
... on BET multilayer theory, specific surface area estimated by water vapor sorption is apparently larger than that by low pressure nitrogen adsorption, possibly due to the complex surface chemistry and water vapor sorption heterogeneity in shale. The heat of adsorption decreases with the water content...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0280
... treatments. The coal particles were treated by LN 2 immersion. The adsorption experiment was conducted to measure the sorption and diffusion behavior of coal. The results indicated that the micropore volume increased by LN 2 treatments and thus sorption capacity and diffusion coefficient of coal were...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0450
... the mechanical properties of reservoir coal formations as a function of confining stress and gas pressure. Coal strength deterioration due to phase-dependent gas adsorption was investigated. It demonstrated that coal strength with adsorbing gas injection had a positive correlation with confining stress; coal...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0506
... to the adsorption capacities of gases. Furthermore, the positive matrix swelling strain induced by adsorption dominates during low pressure period and thereby the volumetric strain will continuously increase with the pressure increasing at this stage. As the pressure continuously increases, the volumetric strain...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1648
... ABSTRACT: The poro-mechanical response of porous rocks is usually defined by Biot effective stress concept. Gas sorbing rocks such as coal do not however follow the conventional effective stress law because of swelling associated with gas adsorption and therefore, modification to the law...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1749
... ABSTRACT: The injection of carbon dioxide to improve the production of shale gas has become one of the key technologies, but its adsorption and desorption mechanism is relatively complicated. In this paper, the adsorption mechanism is studied through a combination of micro-scale numerical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0252
... ABSTRACT: It is well recognized that injecting CO 2 in methane-saturated coal seams can initially decrease the injectivity, followed by a permeability rebound as gas pressure increases. Studies showed that such permeability change is related to the adsorption-deformation coupling which...
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-2018-342
... ABSTRACT: Shale gas reservoirs comprise of various minerals like clay and organic matters. After hydraulic fracturing, large number of water together with CH4 remains in reservoirs. In this case, fluid adsorption is one of obvious fluid-shale interactions and affects geomechanical properties...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-786
... a strong negative correlation was observed between Langmuir pressure (P L ) and characteristic sorption capacity (equation), which is a power term of Langmuir's volume (V L ) and surface heterogeneity factor (?). The result implies that coals with complex structure would have both higher adsorption...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-641
... days, 10 days, 20 days and 30 days), the rock mechanical properties were analyzed properly through the Nano-indentation test with large number of indents. Also, the pore structures of the samples were measured through the low-temperature N 2 adsorption tests. The results showed that, compared...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0427
... western South China Sea field have been tested using X-Ray Diffraction (XRD) tests, nitrogen adsorption (NA) tests, Scanning Electron Microscope (SEM) tests, uniaxial compressive strength tests to study the impact of drilling fluid on shale. The results indicate the total porosity along...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-6937
... recovery is enhanced in heterogonous channelized reservoirs. Injected polymer improves conformance hence recovery by diverting flooded water into unswept portion of the reservoirs. The stress change due to polymer adsorption could be significant and need to be accounted. In this study, implicit...

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