A parametric analysis of capillary pressure effects during geologic carbon sequestration in a sandstone reservoir
Abstract
Abstract During carbon capture and sequestration, capillary forces and buoyancy effects strongly influence CO 2 migration and plume geometry. To understand interactions between these processes, we implement a numerical modeling experiment of CO 2 injections in a sandstone reservoir to understand how parametric variability reported in the literature affects numerical predictions of CO 2 migration. We simulate ten years of supercritical CO 2 (scCO 2 ) injections for 189 unique parameter combinations (entry pressure, P o , and van Genuchten fitting parameter, λ ) that control the van Genuchten capillary pressure model. Results are analyzed on the basis of a dimensionless ratio, ω , which is a modified Bond number that defines the relationship between buoyancy pressure and capillary pressure. When ω > 1, buoyancy governs the system and CO 2 plume geometry is governed by upward flow. In contrast, when ω < 1, then buoyancy is smaller than capillary force and lateral flow governs CO 2 plume geometry. We show that the ω ratio is an easily implemented screening tool for qualitative assessment of CO 2 distribution characteristics. We also show how parametric variability affects the relationship between buoyancy and capillary force, and thus controls CO 2 plume geometry:more »
- Authors:
-
[1];
[1];
[1]
- Department of Geosciences Virginia Polytechnic Institute and State University Blacksburg VA USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1469710
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Greenhouse Gases: Science and Technology
- Additional Journal Information:
- Journal Name: Greenhouse Gases: Science and Technology Journal Volume: 8 Journal Issue: 6; Journal ID: ISSN 2152-3878
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Wu, Hao, Jayne, Richard S., and Pollyea, Ryan M. A parametric analysis of capillary pressure effects during geologic carbon sequestration in a sandstone reservoir. United Kingdom: N. p., 2018.
Web. doi:10.1002/ghg.1815.
Wu, Hao, Jayne, Richard S., & Pollyea, Ryan M. A parametric analysis of capillary pressure effects during geologic carbon sequestration in a sandstone reservoir. United Kingdom. https://doi.org/10.1002/ghg.1815
Wu, Hao, Jayne, Richard S., and Pollyea, Ryan M. Tue .
"A parametric analysis of capillary pressure effects during geologic carbon sequestration in a sandstone reservoir". United Kingdom. https://doi.org/10.1002/ghg.1815.
@article{osti_1469710,
title = {A parametric analysis of capillary pressure effects during geologic carbon sequestration in a sandstone reservoir},
author = {Wu, Hao and Jayne, Richard S. and Pollyea, Ryan M.},
abstractNote = {Abstract During carbon capture and sequestration, capillary forces and buoyancy effects strongly influence CO 2 migration and plume geometry. To understand interactions between these processes, we implement a numerical modeling experiment of CO 2 injections in a sandstone reservoir to understand how parametric variability reported in the literature affects numerical predictions of CO 2 migration. We simulate ten years of supercritical CO 2 (scCO 2 ) injections for 189 unique parameter combinations (entry pressure, P o , and van Genuchten fitting parameter, λ ) that control the van Genuchten capillary pressure model. Results are analyzed on the basis of a dimensionless ratio, ω , which is a modified Bond number that defines the relationship between buoyancy pressure and capillary pressure. When ω > 1, buoyancy governs the system and CO 2 plume geometry is governed by upward flow. In contrast, when ω < 1, then buoyancy is smaller than capillary force and lateral flow governs CO 2 plume geometry. We show that the ω ratio is an easily implemented screening tool for qualitative assessment of CO 2 distribution characteristics. We also show how parametric variability affects the relationship between buoyancy and capillary force, and thus controls CO 2 plume geometry: (1) small entry pressure P o encourages vertical flow and large entry pressure P o inhibits vertical flow; and (2) the van Genuchten fitting parameter λ exhibits minimal control on the spatial distribution of CO 2 , as evidenced by the 2 × difference between the ∂ ω /∂ P o and ∂ ω /∂ λ gradients quantified using response surface analysis of the ω ratio. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.},
doi = {10.1002/ghg.1815},
journal = {Greenhouse Gases: Science and Technology},
number = 6,
volume = 8,
place = {United Kingdom},
year = {Tue Sep 11 00:00:00 EDT 2018},
month = {Tue Sep 11 00:00:00 EDT 2018}
}
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