Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

Zheng, Liange; Spycher, Nicolas; Xu, Tianfu; Apps, John A.; Kharaka, Y. K.; Birkhölzer, Jens

doi:10.2172/1010545

Cited by 17 publications

(21 citation statements)

References 118 publications

(232 reference statements)

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“…The increase of TE concentration in solution is evidenced, and sorption does not balance this release in solution in most cases, despite an available SSA that is much higher than the SSA that will be available in a real storage site. Even in a real storage context, the dissolution is supposed to be lower than what we observe in those experiments, due to aquifer flow, non negligible amounts are thought to be mobilized (Viswanathan et al, 2012;Zheng et al, 2009;Wigand et al, 2008) when one considers the huge volume of injected CO 2 that is envisaged (Lu et al, 2012;Rempel et al, 2011). To fill this gap in our knowledge, more experimental studies must be carried out to understand more the real behavior of those TE in CO 2 storage conditions.…”

Section: Discussionmentioning

confidence: 67%

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Auffray

García

Lienemann

et al. 2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Some key points still prevent the full development of geological carbon sequestration in underground formations, especially concerning the assessment of the integrity of such storage. Indeed, the consequences of gas injection on chemistry and petrophysical properties are still much discussed in the scientific community, and are still not well known at either laboratory or field scale. In this article, the results of an experimental study about the mobilization of Trace Elements (TE) during CO 2 injection in a reservoir are presented. The experimental conditions range from typical storage formation conditions (90 bar, supercritical CO 2 ) to shallower conditions (60 and 30 bar, CO 2 as gas phase), and consider the dissolution of the two carbonates, coupled with the sorption of an initial concentration of 10 À5 M of Zn(II), and the consequent release in solution of Mn(II) and Sr(II). The investigation goes beyond the sole behavior of TE in the storage conditions: it presents the specific behavior of each element with respect to the pressure and the natural carbonate considered, showing that different equilibrium concentrations are to be expected if a fluid with a given concentration of TE leaks to an upper formation. Even though sorption is evidenced, it does not balance the amount of TE released by the dissolution process. The increase in porosity is clearly evidenced as a linear function of the CO 2 pressure imposed for the St-Emilion carbonate. For the Lavoux carbonate, this trend is not confirmed by the 90 bar experiment. A preferential dissolution of the bigger family of pores from the preexisting porosity is observed in one of the samples (Lavoux carbonate) while the second one (St-Emilion carbonate) presents a newly-formed family of pores. Both reacted samples evidence that the pore network evolves toward a tubular network type.

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Section: Discussionmentioning

confidence: 67%

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Auffray

García

Lienemann

et al. 2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Cation-exchange reactions can also impact the mobilization of trace metals as reported by Zheng et al, 41 who conducted geochemical modeling of the CO 2 release test at the ZERT site. In this study, cation-exchange reactions were considered as an alternative for the mobilization of trace metals caused by the codissolution of dolomite.…”

Section: Articlementioning

confidence: 86%

Integrated Framework for Assessing Impacts of CO₂ Leakage on Groundwater Quality and Monitoring-Network Efficiency: Case Study at a CO₂ Enhanced Oil Recovery Site

Yang

Hovorka

Treviño

et al. 2015

Environ. Sci. Technol.

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This study presents a combined use of site characterization, laboratory experiments, single-well push-pull tests (PPTs), and reactive transport modeling to assess potential impacts of CO2 leakage on groundwater quality and leakage-detection ability of a groundwater monitoring network (GMN) in a potable aquifer at a CO2 enhanced oil recovery (CO2 EOR) site. Site characterization indicates that failures of plugged and abandoned wells are possible CO2 leakage pathways. Groundwater chemistry in the shallow aquifer is dominated mainly by silicate mineral weathering, and no CO2 leakage signals have been detected in the shallow aquifer. Results of the laboratory experiments and the field test show no obvious damage to groundwater chemistry should CO2 leakage occur and further were confirmed with a regional-scale reactive transport model (RSRTM) that was built upon the batch experiments and validated with the single-well PPT. Results of the RSRTM indicate that dissolved CO2 as an indicator for CO2 leakage detection works better than dissolved inorganic carbon, pH, and alkalinity at the CO2 EOR site. The detection ability of a GMN was assessed with monitoring efficiency, depending on various factors, including the natural hydraulic gradient, the leakage rate, the number of monitoring wells, the aquifer heterogeneity, and the time for a CO2 plume traveling to the monitoring well.

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“…Analysis for a limited number of dissolved organic species revealed significant concentrations of C1-C5 organic anions, plus toluene concentrations in excess of the U.S. Environmental Protection Agency's drinking water standard of 1 ppm. In another study, Zheng et al (2012) used computer simulations to illustrate how benzene could be mobilized from a deep storage formation to an overlying aquifer, with benzene building up in the leading edge of a scCO 2 plume because of preferential partitioning in scCO 2 relative to water. Therefore, given the solvent properties of scCO 2 , the influx of organic contaminants would be a plausible outcome of the intrusion of CO 2 -rich water into a potable aquifer.…”

Section: Importance Of Organic Matter and Microorganismsmentioning

confidence: 99%

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Harvey¹,

Qafoku²,

Cantrell³

et al. 2012

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Leakage from deep storage reservoirs is a major risk factor associated with geologic sequestration of carbon dioxide (CO 2 ). Different scientific theories exist concerning the potential implications of such leakage for near-surface environments. The authors of this report reviewed the current literature on how CO 2 leakage (from storage reservoirs) would likely impact the geochemistry of near surface environments such as potable water aquifers and the vadose zone.Experimental and modeling studies highlighted the potential for both beneficial (e.g., CO 2 re-sequestration or contaminant immobilization) and deleterious (e.g., contaminant mobilization) consequences of CO 2 intrusion in these systems. Current knowledge gaps, including the role of CO 2 -induced changes in redox conditions, the influence of CO 2 influx rate, gas composition, organic matter content and microorganisms are discussed in terms of their potential influence on pertinent geochemical processes and the potential for beneficial or deleterious outcomes.Geochemical modeling was used to systematically highlight why closing these knowledge gaps are pivotal. A framework for studying and assessing consequences associated with each factor is also presented in Section 5.6. v

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Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

Cited by 17 publications

References 118 publications

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Integrated Framework for Assessing Impacts of CO₂ Leakage on Groundwater Quality and Monitoring-Network Efficiency: Case Study at a CO₂ Enhanced Oil Recovery Site

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

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Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

Cited by 17 publications

References 118 publications

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO2Storage Conditions

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO2Storage Conditions

Integrated Framework for Assessing Impacts of CO2 Leakage on Groundwater Quality and Monitoring-Network Efficiency: Case Study at a CO2 Enhanced Oil Recovery Site

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Contact Info

Product

Resources

About

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Zn(II), Mn(II) and Sr(II) Behavior in a Natural Carbonate Reservoir System. Part II: Impact of Geological CO₂Storage Conditions

Integrated Framework for Assessing Impacts of CO₂ Leakage on Groundwater Quality and Monitoring-Network Efficiency: Case Study at a CO₂ Enhanced Oil Recovery Site