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Title: Solvent-pore interactions in the Eagle Ford shale formation

Abstract

In this work, the effect of solvent extraction on pore space was examined on a suite of samples from the Eagle Ford Shale Formation with varying lithologies and maturities. Several solvents -toluene, cyclohexane, methanol, dichloromethane, and hydrochloric acid- were contacted with shale samples, extracting the compatible organic matter. The porosity in these extracted shale samples was compared to unmodified samples. The amount and type of organic matter extracted were determined using Gas Chromatography - Mass Spectrometry, and the porosity was determined by (Ultra) Small Angle Neutron Scattering. Mostly alkanes and aromatics were detected in the extracts, but other portions of bitumen may also have been present. Only higher molecular weight alkanes were extracted with hydrochloric acid, suggesting that physical dissolution of carbonate minerals may have liberated this portion of organic matter and the solvent was not able to penetrate the bitumen and kerogen to extract the lower molecular weight alkanes. Lastly, a decrease in porosity with extraction was observed and attributed to a dominant mechanism of kerogen swelling due to kerogen-solvent interaction.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [3];  [4];  [4];  [5]; ORCiD logo [2]; ORCiD logo [2];  [3]; ORCiD logo [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. Chesapeake Energy, Oklahoma City, OK (United States)
  6. {Larry} M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
OSTI Identifier:
1488717
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 238; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 04 OIL SHALES AND TAR SANDS

Citation Formats

Distefano, Victoria H., Mcfarlane, Joanna, Stack, Andrew G., Perfect, Edmund, Mildner, D.F.R., Bleuel, Markus, Chipera, Steve, Littrell, Ken, Cheshire, Michael C., Manz, Kathrine, and Anovitz, Lawrence. Solvent-pore interactions in the Eagle Ford shale formation. United States: N. p., 2018. Web. doi:10.1016/j.fuel.2018.10.010.
Distefano, Victoria H., Mcfarlane, Joanna, Stack, Andrew G., Perfect, Edmund, Mildner, D.F.R., Bleuel, Markus, Chipera, Steve, Littrell, Ken, Cheshire, Michael C., Manz, Kathrine, & Anovitz, Lawrence. Solvent-pore interactions in the Eagle Ford shale formation. United States. doi:10.1016/j.fuel.2018.10.010.
Distefano, Victoria H., Mcfarlane, Joanna, Stack, Andrew G., Perfect, Edmund, Mildner, D.F.R., Bleuel, Markus, Chipera, Steve, Littrell, Ken, Cheshire, Michael C., Manz, Kathrine, and Anovitz, Lawrence. Mon . "Solvent-pore interactions in the Eagle Ford shale formation". United States. doi:10.1016/j.fuel.2018.10.010.
@article{osti_1488717,
title = {Solvent-pore interactions in the Eagle Ford shale formation},
author = {Distefano, Victoria H. and Mcfarlane, Joanna and Stack, Andrew G. and Perfect, Edmund and Mildner, D.F.R. and Bleuel, Markus and Chipera, Steve and Littrell, Ken and Cheshire, Michael C. and Manz, Kathrine and Anovitz, Lawrence},
abstractNote = {In this work, the effect of solvent extraction on pore space was examined on a suite of samples from the Eagle Ford Shale Formation with varying lithologies and maturities. Several solvents -toluene, cyclohexane, methanol, dichloromethane, and hydrochloric acid- were contacted with shale samples, extracting the compatible organic matter. The porosity in these extracted shale samples was compared to unmodified samples. The amount and type of organic matter extracted were determined using Gas Chromatography - Mass Spectrometry, and the porosity was determined by (Ultra) Small Angle Neutron Scattering. Mostly alkanes and aromatics were detected in the extracts, but other portions of bitumen may also have been present. Only higher molecular weight alkanes were extracted with hydrochloric acid, suggesting that physical dissolution of carbonate minerals may have liberated this portion of organic matter and the solvent was not able to penetrate the bitumen and kerogen to extract the lower molecular weight alkanes. Lastly, a decrease in porosity with extraction was observed and attributed to a dominant mechanism of kerogen swelling due to kerogen-solvent interaction.},
doi = {10.1016/j.fuel.2018.10.010},
journal = {Fuel},
issn = {0016-2361},
number = C,
volume = 238,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 29, 2019
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