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Keywords: isotherm
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Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, June 20–22, 2022
Paper Number: URTEC-3722999-MS
... isotherm history cgr profile cyclic gas injection scheme URTeC: 3722999 Choke Management- the Driver of Liquid Yield Trends in Shale Reservoirs Yalda Barzin*, Gregory J Walker, Repsol Exploration SA Copyright 2022, Unconventional Resources Technology Conference (URTeC) DOI 10.15530/urtec-2022...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5550-MS
... and Knudsen diffusion) and sorption behavior (including sorption kinetics and isotherms) under varying stress conditions. The objective of this work is to facilitate the interpretation of laboratory-scale experiments, at relevant conditions, in an attempt to bridge the gap in scales between laboratory...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-1074-MS
..., and the isotherms used to model adsorption of CO 2 to shale are listed and their advantages and limitations are described. Another main focus of this research is the capacity of CO 2 that can be stored in shale via adsorption. The research therefore covers the adsorption capacity in scf/ton for different shale...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-534-MS
... et al. 2012) PVT measurement Modeling & Simulation Upstream Oil & Gas chalk sample silica gel experimental study porous material bulk fluid isotherm Valdemar field determination thermogram Phase Behavior synthetic porous material different porous material temperature...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2902821-MS
... Langmuir isotherm as well as the phase separation of nitrogen at 77 K. We then apply our model to three different pore geometries (i.e. slit, circular and triangular) to simulate nitrogen adsorption isotherm at 77 K, which is frequently used for pore size distribution and surface area characterization...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2902677-MS
...-relevant conditions. This methodology progresses the accuracy of PVT analysis for use in unconventional reservoirs. complex reservoir Phase Behavior experiment PVT measurement isotherm nanopore glass bead core holder condensation Reservoir Characterization empty core holder composition...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2886080-MS
... of the shales and adsorbed gas on the surface of the shale matrix. The total gas in place is dependent on the pore pressure and temperature and is vital to the profitable development of a shale reservoir. The goal of this work has been to employ NMR T 2 distributions to derive gas isotherms. Methods...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 1–3, 2016
Paper Number: URTEC-2457581-MS
... by subtracting adsorbed gas reservoir volume from free gas volume in order to obtain improved OGIP estimations. This change was assessed in the context of Langmuir and BET isotherm adsorption models. A 25-year EUR response surface model was created using a semi-analytical model from our previous work. Both OGIP...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 1–3, 2016
Paper Number: URTEC-2461269-MS
... the fate of residual treatment water in shale systems. In this work, thickness and stability of water film were investigated by water sorption isotherm on clay and shale samples. Meanwhile, a new approach based on surface forces (disjoining pressure), which result in the instability of adsorbed film...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2015
Paper Number: URTEC-2169349-MS
... well; the other models failed to account for both measurements. shale gas pore structure complex reservoir core 6 Upstream Oil & Gas isotherm adsorption desorption isotherm disaggregated pore evaporation pressure bundle treelike structure adsorption pore mercury spe-178656-m...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2015
Paper Number: URTEC-2174964-MS
... sample. Generally, single molecular layer adsorption in simple geometries is observed and the adsorption isotherm can be fitted by Langmuir type of adsorption isotherm. Besides, non­continuum features of gas transport behaviors such as slippery boundary and Knudsen diffusion dominated flow demonstrate...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 25–27, 2014
Paper Number: URTEC-1913287-MS
... concentrations. The data could be fit to a Langmuir type adsorption isotherm. The adsorption parameters were determined and results were compared and discussed. This work shows that the non-ionic surfactant is able to reduce the reservoir oil-brine IFT from its original value (27 mN/m) down to 15 mN/m while...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 25–27, 2014
Paper Number: URTEC-1922165-MS
... or by the electrostatic attraction due to polar ends of the solid-gas molecules. In shale, adsorption develops in the organic pores with characteristically large surface area. The unconventional gas industry uses Langmuir s equation in a form of an isotherm, which is a relationship of the amount (typically) volume...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 25–27, 2014
Paper Number: URTEC-1928491-MS
.... This analytical model derives from the Bump model to consider changes in gas compressibility (cg) and the King model to consider changes in the gas compressibility factor (z). It also considers Langmuir isotherms, which characterize gas desorption in the reservoir due to pressure drops. With these models...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 12–14, 2013
Paper Number: URTEC-1583690-MS
... isotherms at different temperatures. For clay-mineral rich rocks, the heat of adsorption ( q ) ranges from 9.4 to 16.6 kJ/mol. These values are considerably smaller than those for CH4 adsorption on kerogen (21.9-28 kJ/mol) and organic-rich shales (15.1-18.4 kJ/mol). The standard entropy (??? so ) ranges...

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