Gravity-driven controls on fluid and carbonate precipitation distributions in fractures
Abstract
Abstract Many challenges related to carbon-dioxide ( $$$$\hbox {CO}_2$$$$ ) sequestration in subsurface rock are linked to the injection of fluids through induced or existing fracture networks and how these fluids are altered through geochemical interactions. Here, we demonstrate that fluid mixing and carbonate mineral distributions in fractures are controlled by gravity-driven chemical dynamics. Using optical imaging and numerical simulations, we show that a density contrast between two miscible fluids causes the formation of a low-density fluid runlet that increases in areal extent as the fracture inclination decreases from 90 $$$$^\circ$$$$ (vertical fracture plane) to 30 $$$$^\circ$$$$ . The runlet is sustained over time and the stability of the runlet is controlled by the gravity-driven formation of 3D vortices that arise in a laminar flow regime. When homogeneous precipitation was induced, calcium carbonate covered the entire surface for horizontal fractures (0 $$$$^\circ$$$$ ). However, for fracture inclinations greater than 10 $$$$^\circ$$$$ , the runlet formation limited the areal extent of the precipitation to less than 15% of the fracture surface. These insights suggest that the ability to sequester $$$$\hbox {CO}_2$$$$ through mineralization along fractures will depend on the fracture orientation relative to gravity, with horizontal fractures more likely to seal uniformly.
- Authors:
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1984559
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Name: Scientific Reports Journal Volume: 13 Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Xu, Zhenyu, Cao, Hongfan, Yoon, Seonkyoo, Kang, Peter K., Jun, Young-Shin, Kneafsey, Timothy, Sheets, Julia M., Cole, David, and Pyrak-Nolte, Laura J. Gravity-driven controls on fluid and carbonate precipitation distributions in fractures. United Kingdom: N. p., 2023.
Web. doi:10.1038/s41598-023-36406-8.
Xu, Zhenyu, Cao, Hongfan, Yoon, Seonkyoo, Kang, Peter K., Jun, Young-Shin, Kneafsey, Timothy, Sheets, Julia M., Cole, David, & Pyrak-Nolte, Laura J. Gravity-driven controls on fluid and carbonate precipitation distributions in fractures. United Kingdom. https://doi.org/10.1038/s41598-023-36406-8
Xu, Zhenyu, Cao, Hongfan, Yoon, Seonkyoo, Kang, Peter K., Jun, Young-Shin, Kneafsey, Timothy, Sheets, Julia M., Cole, David, and Pyrak-Nolte, Laura J. Fri .
"Gravity-driven controls on fluid and carbonate precipitation distributions in fractures". United Kingdom. https://doi.org/10.1038/s41598-023-36406-8.
@article{osti_1984559,
title = {Gravity-driven controls on fluid and carbonate precipitation distributions in fractures},
author = {Xu, Zhenyu and Cao, Hongfan and Yoon, Seonkyoo and Kang, Peter K. and Jun, Young-Shin and Kneafsey, Timothy and Sheets, Julia M. and Cole, David and Pyrak-Nolte, Laura J.},
abstractNote = {Abstract Many challenges related to carbon-dioxide ( $$\hbox {CO}_2$$ CO 2 ) sequestration in subsurface rock are linked to the injection of fluids through induced or existing fracture networks and how these fluids are altered through geochemical interactions. Here, we demonstrate that fluid mixing and carbonate mineral distributions in fractures are controlled by gravity-driven chemical dynamics. Using optical imaging and numerical simulations, we show that a density contrast between two miscible fluids causes the formation of a low-density fluid runlet that increases in areal extent as the fracture inclination decreases from 90 $$^\circ$$ ∘ (vertical fracture plane) to 30 $$^\circ$$ ∘ . The runlet is sustained over time and the stability of the runlet is controlled by the gravity-driven formation of 3D vortices that arise in a laminar flow regime. When homogeneous precipitation was induced, calcium carbonate covered the entire surface for horizontal fractures (0 $$^\circ$$ ∘ ). However, for fracture inclinations greater than 10 $$^\circ$$ ∘ , the runlet formation limited the areal extent of the precipitation to less than 15% of the fracture surface. These insights suggest that the ability to sequester $$\hbox {CO}_2$$ CO 2 through mineralization along fractures will depend on the fracture orientation relative to gravity, with horizontal fractures more likely to seal uniformly.},
doi = {10.1038/s41598-023-36406-8},
journal = {Scientific Reports},
number = 1,
volume = 13,
place = {United Kingdom},
year = {Fri Jun 09 00:00:00 EDT 2023},
month = {Fri Jun 09 00:00:00 EDT 2023}
}
https://doi.org/10.1038/s41598-023-36406-8
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