In situ contact angle measurements of liquid CO2, brine, and Mount Simon sandstone core using micro X-ray CT imaging, sessile drop, and Lattice Boltzmann modeling
- National Energy Technology Lab. (NETL), Morgantown, WV and Pittsburgh, PA (United States); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
- National Energy Technology Lab. (NETL), Morgantown, WV and Pittsburgh, PA (United States)
- Univ. of Texas, Austin, TX (United States). Dept. of Civil, Architecture and Environmental Engineering
- Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Civil and Environmental Engineering
Three techniques to measure and understand the contact angle, θ, of a CO2/brine/rock system relevant to geologic carbon storage were performed with Mount Simon sandstone. Traditional sessile drop measurements of CO2/brine on the sample were conducted and a water-wet system was observed, as is expected. A novel series of measurements inside of a Mount Simon core, using a micro X-ray computed tomography imaging system with the ability to scan samples at elevated pressures, was used to examine the θ of residual bubbles of CO2. Within the sandstone core the matrix appeared to be neutrally wetting, with an average θ around 90°. A large standard deviation of θ (20.8°) within the core was also observed. To resolve this discrepancy between experimental measurements, a series of Lattice Boltzmann model simulations were performed with differing intrinsic θ values. The model results with a θ = 80° were shown to match the core measurements closely, in both magnitude and variation. The small volume and complex geometry of the pore spaces that CO2 was trapped in is the most likely explanation of this discrepancy between measured values, though further work is warranted.
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research; Energy Frontier Research Centers (EFRC) (United States). Center for Geologic Storage of CO2 (GSCO2)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012504; SC0C12504
- OSTI ID:
- 1354725
- Alternate ID(s):
- OSTI ID: 1550621
- Report Number(s):
- NETL-PUB-20383; PII: S0920410517302292
- Journal Information:
- Journal of Petroleum Science and Engineering, Vol. 155; ISSN 0920-4105
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Modeling $$\hbox {CO}_2$$ CO 2 -Induced Alterations in Mt. Simon Sandstone via Nanomechanics
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journal | December 2018 |
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