Experimental and theoretical study on the formation of volatile sulfur compounds under gas reservoir conditions

Meshoulam, Alexander; Said–Ahmad, Ward; Turich, Courtney; Luu, Nathalie; Jacksier, Tracey; Shurki, Avital; Amrani, Alon

doi:10.1016/j.orggeochem.2020.104175

Cited by 17 publications

(4 citation statements)

References 39 publications

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“…The complex physical environment of the reservoir also drives the TSR. The main reactants of TSR are sulfates and hydrocarbons . Minerals in the reservoir have an important contribution to TSR.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Wang

Zhu²,

Zhang

et al. 2023

Energy Fuels

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Hydrogen sulfide (H 2 S) is a hazardous and corrosive byproduct generated during heavy oil recovery, particularly during hot water flooding. Previous studies on factors influencing H 2 S generation during hot water flooding have been mainly focused on high temperatures (>250 °C), which may not accurately represent reservoir conditions. Moreover, the concentration of H 2 S produced by hot water flooding at low temperatures exceeds the standard. In this study, experiments were conducted on hot water flooding at low temperatures (110−150 °C). The mechanism of reactants and reaction conditions on H 2 S generation was investigated. The results showed that thermochemical sulfate reduction (TSR) was the primary reaction type responsible for H 2 S generation, while aquathermolysis and pyrite oxidation reactions weakly or did not occur. The reactivity of TSR was directly proportional to reaction temperature and time, while inversely proportional to reaction pH. The formation of oxidants ([MgSO 4 ] CIP and HSO 4 − ) was also found to be crucial for TSR initiation. Unstable organic sulfur-containing compounds were oxidized to produce CO 2 , H 2 S, SO 3 , and solid bitumen, which further sustained the autocatalytic reaction. Low temperature TSR was found to consume the saturated fraction in heavy oil and convert inorganic sulfur to organic sulfide. The increase in pH inhibited the conversion of inorganic sulfur to organic sulfur, resulting in a higher percentage of the saturated fraction. This study provides new insights into the low temperature TSR reaction mechanism and the origin of H 2 S, which can aid in better understanding and mitigation of the associated risks during heavy oil recovery.

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Section: Introductionmentioning

confidence: 99%

“…The main reactants of TSR are sulfates and hydrocarbons. 24 Minerals in the reservoir have an important contribution to TSR. Xiao et al 16 conducted experiments using montmorillonite (silicate), illite, quartz (silicate), calcite, and dolomite (carbonate) at 360 °C.…”

Section: Introductionmentioning

confidence: 99%

Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Wang

Zhu²,

Zhang

et al. 2023

Energy Fuels

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Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the 34 S isotopes of organosulfur compounds have not been explored due to the limitations of separation and analytic techniques. The δ 34 S values of a few specific organosulfur compounds, for instance, dibenzothiophenes and benzothiophenes in petroleum 23 and sediments 24 and methanesulfonic acid 25,26 To the best of our knowledge, the 13 C and 34 S isotopes of OSs in atmospheric aerosols are not well-known at the molecular level. In particular, knowledge of isotope values (δ 34 S) of OSs in ambient aerosols is scarce.…”

Section: ■ Introductionmentioning

confidence: 99%

Deciphering ¹³C and ³⁴S Isotopes of Organosulfates in Urban Aerosols by FT-ICR Mass Spectrometry

Xie

Dai

et al. 2022

Environ. Sci. Technol. Lett.

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Organosulfates (OSs) are some of the important components of secondary organic aerosols in ambient air. However, little is known about the stable carbon and sulfur isotopic compositions of OSs. Here, we identified the isotopic pair 12 C n / 13 C 12 C n−1 and 32 S n / 34 S 32 S n−1 formulas in urban aerosols using ultra-highresolution Fourier transform ion cyclotron resonance mass spectrometry. Family series of 694−1649 13 C 32 S OSs and 40−144 12 C 34 S OSs with completely coherent carbon chains were detected, accounting for 37−52% and 2.2−4.5%, respectively, of the observed 12 C 32 S OSs. OSs with detected isotopic peaks have relatively high levels of saturation and high volatilities, especially those containing 34 S isotopes with H/C > 1.5. Moreover, the δ 13 C and δ 34 S values of OSs were estimated with mean values ranging from −22‰ to −0.87‰ and from −1‰ to 26‰, respectively. Notably, unsaturated OSs might be more enriched with 34 S than aliphatic ones. Furthermore, all detected 12 C 34 S OSs are in the low-O/C corridor with a low carbon oxidation state, which are mostly volatile and low-volatile organic compounds with high volatility, implying that they are generated by gasphase oxidation. These findings represent a first step toward identifying the individual molecules of 13 C and 34 S isotopic OSs in atmospheric aerosols.

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Chemical, carbon and sulfur isotopic compositions constrain the origin of Upper Carboniferous-Lower Triassic gases in eastern Sichuan Basin, SW China

Cai,

Kutuzov,

Mei

et al. 2024

Sci. China Earth Sci.

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Experimental and theoretical study on the formation of volatile sulfur compounds under gas reservoir conditions

Cited by 17 publications

References 39 publications

Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Deciphering ¹³C and ³⁴S Isotopes of Organosulfates in Urban Aerosols by FT-ICR Mass Spectrometry

Chemical, carbon and sulfur isotopic compositions constrain the origin of Upper Carboniferous-Lower Triassic gases in eastern Sichuan Basin, SW China

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Experimental and theoretical study on the formation of volatile sulfur compounds under gas reservoir conditions

Cited by 17 publications

References 39 publications

Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Study on the Generation Mechanism of Hydrogen Sulfide by Thermochemical Sulfate Reduction in Heavy Oil Hot Water Flooding at Low Temperature

Deciphering 13C and 34S Isotopes of Organosulfates in Urban Aerosols by FT-ICR Mass Spectrometry

Chemical, carbon and sulfur isotopic compositions constrain the origin of Upper Carboniferous-Lower Triassic gases in eastern Sichuan Basin, SW China

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Deciphering ¹³C and ³⁴S Isotopes of Organosulfates in Urban Aerosols by FT-ICR Mass Spectrometry