Regional-scale advective, diffusive, and eruptive dynamics of CO2 and brine leakage through faults and wellbores

Na Hyun Jung, Weon Shik Han, Kyungdoe Han, Eungyu Park

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Regional-scale advective, diffusive, and eruptive transport dynamics of CO2 and brine within a natural analogue in the northern Paradox Basin, Utah, were explored by integrating numerical simulations with soil CO2 flux measurements. Deeply sourced CO2 migrates through steeply dipping fault zones to the shallow aquifers predominantly as an aqueous phase. Dense CO2-rich brine mixes with regional groundwater, enhancing CO2 dissolution. Linear stability analysis reveals that CO2 could be dissolved completely within only ~500 years. Assigning lower permeability to the fault zones induces fault-parallel movement, feeds up-gradient aquifers with more CO2, and impedes down-gradient fluid flow, developing anticlinal CO2 traps at shallow depths (<300 m). The regional fault permeability that best reproduces field spatial CO2 flux variation is estimated 1 × 10-17 ≤ kh < 1 × 10-16 m2 and 5 × 10-16 ≤ kv < 1 × 10-15 m2. The anticlinal trap serves as an essential fluid source for eruption at Crystal Geyser. Geyser-like discharge sensitively responds to varying well permeability, radius, and CO2 recharge rate. The cyclic behavior of wellbore CO2 leakage decreases with time

Original languageEnglish
Pages (from-to)3003-3025
Number of pages23
JournalJournal of Geophysical Research: Solid Earth
Volume120
Issue number5
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Aquifers
geyser
brine
leakage
permeability
aquifers
Fluxes
Linear stability analysis
fault zone
traps
aquifer
natural analog
Flow of fluids
Groundwater
gradients
Dissolution
paradoxes
flux measurement
ground water
dipping

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

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title = "Regional-scale advective, diffusive, and eruptive dynamics of CO2 and brine leakage through faults and wellbores",
abstract = "Regional-scale advective, diffusive, and eruptive transport dynamics of CO2 and brine within a natural analogue in the northern Paradox Basin, Utah, were explored by integrating numerical simulations with soil CO2 flux measurements. Deeply sourced CO2 migrates through steeply dipping fault zones to the shallow aquifers predominantly as an aqueous phase. Dense CO2-rich brine mixes with regional groundwater, enhancing CO2 dissolution. Linear stability analysis reveals that CO2 could be dissolved completely within only ~500 years. Assigning lower permeability to the fault zones induces fault-parallel movement, feeds up-gradient aquifers with more CO2, and impedes down-gradient fluid flow, developing anticlinal CO2 traps at shallow depths (<300 m). The regional fault permeability that best reproduces field spatial CO2 flux variation is estimated 1 × 10-17 ≤ kh < 1 × 10-16 m2 and 5 × 10-16 ≤ kv < 1 × 10-15 m2. The anticlinal trap serves as an essential fluid source for eruption at Crystal Geyser. Geyser-like discharge sensitively responds to varying well permeability, radius, and CO2 recharge rate. The cyclic behavior of wellbore CO2 leakage decreases with time",
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Regional-scale advective, diffusive, and eruptive dynamics of CO2 and brine leakage through faults and wellbores. / Jung, Na Hyun; Han, Weon Shik; Han, Kyungdoe; Park, Eungyu.

In: Journal of Geophysical Research: Solid Earth, Vol. 120, No. 5, 01.05.2015, p. 3003-3025.

Research output: Contribution to journalArticle

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