Experimental and Modeling Study of Methane Adsorption onto Partially Saturated Shales
Abstract
Abstract Shale gas equilibrates through gas‐liquid‐solid interactions in reservoirs, but the role of moisture is rarely investigated. To determine how adsorbed water influences methane behavior, three carboniferous shale samples from the Qaidam Basin, China, were humidified at five levels up to a relative humidity of 89%, and their methane capacities at pressures up to 12 MPa were studied. The experimental results indicate that two water‐related mechanisms, “water blocking for methane transport” and “surface competition for gas‐solid interaction,” are primarily responsible for the methane capacity variations. A compositional comparison suggests that a high abundance of clay minerals plays a favorable role in methane migration by retaining water in interlayer pores. Based on the experimental data, an optimized method for calculating the adsorption amount based on an approximation of density distribution is proposed. The model predicts the average thickness of the adsorption layer and the adsorbed methane density distribution on the surface at a given pressure. The methane adsorption layer “thins” in a stepped pattern by up to 45% in the presence of water, with little further change observed at relative humidities greater than 75% in the studied samples.
- Authors:
-
- China Univ. of Geosciences (Beijing), Beijing (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- China Univ. of Geosciences (Beijing), Beijing (China)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1477333
- Alternate Identifier(s):
- OSTI ID: 1462113
- Grant/Contract Number:
- AC02-05CH11231; DE‐AC02‐05CH11231; FWP‐ESD14085
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Water Resources Research
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 7; Journal ID: ISSN 0043-1397
- Publisher:
- American Geophysical Union (AGU)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; methane adsorption; moisture; shale
Citation Formats
Wang, Lu, Wan, Jiamin, Tokunaga, Tetsu K., Kim, Yongman, and Yu, Qingchun. Experimental and Modeling Study of Methane Adsorption onto Partially Saturated Shales. United States: N. p., 2018.
Web. doi:10.1029/2017WR020826.
Wang, Lu, Wan, Jiamin, Tokunaga, Tetsu K., Kim, Yongman, & Yu, Qingchun. Experimental and Modeling Study of Methane Adsorption onto Partially Saturated Shales. United States. https://doi.org/10.1029/2017WR020826
Wang, Lu, Wan, Jiamin, Tokunaga, Tetsu K., Kim, Yongman, and Yu, Qingchun. Thu .
"Experimental and Modeling Study of Methane Adsorption onto Partially Saturated Shales". United States. https://doi.org/10.1029/2017WR020826. https://www.osti.gov/servlets/purl/1477333.
@article{osti_1477333,
title = {Experimental and Modeling Study of Methane Adsorption onto Partially Saturated Shales},
author = {Wang, Lu and Wan, Jiamin and Tokunaga, Tetsu K. and Kim, Yongman and Yu, Qingchun},
abstractNote = {Abstract Shale gas equilibrates through gas‐liquid‐solid interactions in reservoirs, but the role of moisture is rarely investigated. To determine how adsorbed water influences methane behavior, three carboniferous shale samples from the Qaidam Basin, China, were humidified at five levels up to a relative humidity of 89%, and their methane capacities at pressures up to 12 MPa were studied. The experimental results indicate that two water‐related mechanisms, “water blocking for methane transport” and “surface competition for gas‐solid interaction,” are primarily responsible for the methane capacity variations. A compositional comparison suggests that a high abundance of clay minerals plays a favorable role in methane migration by retaining water in interlayer pores. Based on the experimental data, an optimized method for calculating the adsorption amount based on an approximation of density distribution is proposed. The model predicts the average thickness of the adsorption layer and the adsorbed methane density distribution on the surface at a given pressure. The methane adsorption layer “thins” in a stepped pattern by up to 45% in the presence of water, with little further change observed at relative humidities greater than 75% in the studied samples.},
doi = {10.1029/2017WR020826},
journal = {Water Resources Research},
number = 7,
volume = 54,
place = {United States},
year = {Thu May 31 00:00:00 EDT 2018},
month = {Thu May 31 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: