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Title: Kerogen Swelling and Confinement: Its implication on Fluid Thermodynamic Properties in Shales

Abstract

Type I kerogen was isolated from Green River Shale and characterized using SEM, TGA, DSC, and nitrogen adsorption. The swelling behavior of this kerogen with decane was analyzed using traditional test-tube swelling experiment and Dynamic Light Scattering. The TGA and DSC were used to analyze the thermodynamic behavior of decane that was sorbed in the kerogen and show that kerogen suppresses the boiling point of decane due to the effect of confinement. However, the suppression is larger when oil (a multicomponent mixture) was used, possibly due to the combined effect of differential uptake of components by kerogen (kerogen prefers and sorbs polars and aromatics more than saturates, leading to splitting of oil into a sorbed and a free phase) and confinement in nano pores. Test-tube swelling, TGA, and DSC experiments were also performed on pyridine(polar-aromatic)-swelled kerogen. The combined and individual contributions from the two effects (the effect of confinement and differential uptake of hydrocarbon components) on properties of liquid in contact with kerogen, are studied in this work. Molecular Dynamics (MD) simulations revealed the variation in the swelling of type II kerogen in the presence of same amount of different liquids (differential swelling of kerogen).

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [2]
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1469361
Grant/Contract Number:  
[AC07-05ID14517]
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
[ Journal Volume: 7; Journal Issue: 1]; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Pathak, Manas, Kweon, Hyukmin, Deo, Milind, and Huang, Hai. Kerogen Swelling and Confinement: Its implication on Fluid Thermodynamic Properties in Shales. United States: N. p., 2017. Web. doi:10.1038/s41598-017-12982-4.
Pathak, Manas, Kweon, Hyukmin, Deo, Milind, & Huang, Hai. Kerogen Swelling and Confinement: Its implication on Fluid Thermodynamic Properties in Shales. United States. doi:10.1038/s41598-017-12982-4.
Pathak, Manas, Kweon, Hyukmin, Deo, Milind, and Huang, Hai. Mon . "Kerogen Swelling and Confinement: Its implication on Fluid Thermodynamic Properties in Shales". United States. doi:10.1038/s41598-017-12982-4. https://www.osti.gov/servlets/purl/1469361.
@article{osti_1469361,
title = {Kerogen Swelling and Confinement: Its implication on Fluid Thermodynamic Properties in Shales},
author = {Pathak, Manas and Kweon, Hyukmin and Deo, Milind and Huang, Hai},
abstractNote = {Type I kerogen was isolated from Green River Shale and characterized using SEM, TGA, DSC, and nitrogen adsorption. The swelling behavior of this kerogen with decane was analyzed using traditional test-tube swelling experiment and Dynamic Light Scattering. The TGA and DSC were used to analyze the thermodynamic behavior of decane that was sorbed in the kerogen and show that kerogen suppresses the boiling point of decane due to the effect of confinement. However, the suppression is larger when oil (a multicomponent mixture) was used, possibly due to the combined effect of differential uptake of components by kerogen (kerogen prefers and sorbs polars and aromatics more than saturates, leading to splitting of oil into a sorbed and a free phase) and confinement in nano pores. Test-tube swelling, TGA, and DSC experiments were also performed on pyridine(polar-aromatic)-swelled kerogen. The combined and individual contributions from the two effects (the effect of confinement and differential uptake of hydrocarbon components) on properties of liquid in contact with kerogen, are studied in this work. Molecular Dynamics (MD) simulations revealed the variation in the swelling of type II kerogen in the presence of same amount of different liquids (differential swelling of kerogen).},
doi = {10.1038/s41598-017-12982-4},
journal = {Scientific Reports},
number = [1],
volume = [7],
place = {United States},
year = {2017},
month = {10}
}

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