1887

Abstract

Summary

In this study, the carbon isotopic (δ13C) and chemical compositions of produced gases and liquids, as well as sulfur isotopic compositions (δ34S) of H2S and anhydrite samples collected from Lower Anisian to Upper Kimmeridgian carbonate intervals of variable H2S concentrations were measured to better assess the origin of H2S and propose possible reaction pathways. Our multi-proxy geochemical interpretations reveal that thermochemical sulfate reduction (TSR) is the dominant process responsible for generating the H2S encountered in our study area. We observed variability in sulfur isotopic fractionation between produced H2S and anhydrite, suggesting that TSR is mainly controlled by the viability of sulfate and the rate of TSR reduction.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.2021623001
2021-09-15
2024-04-29
Loading full text...

Full text loading...

References

  1. Alrowaie, M. A., Jubb, A. M., Schimmelmann, A., Mastalerz, M., & Pratt, L. M.
    (2019). Hydrous heating experiments at 130° C yield insights into the occurrence of hydrogen sulfide and light alkanes in natural gas reservoirs. Organic Geochemistry, 137, 103901.
    [Google Scholar]
  2. Amrani, A.
    (2014). Organosulfur compounds: molecular and isotopic evolution from biota to oil and gas. Annual Review of Earth and Planetary Sciences, 42, 733–768.
    [Google Scholar]
  3. Bottrell, S. H., & Newton, R. J.
    (2006). Reconstruction of changes in global sulfur cycling from marine sulfate isotopes. Earth-Science Reviews, 75(1–4), 59–83.
    [Google Scholar]
  4. Canfield, D. E., Farquhar, J., & Zerkle, A. L.
    (2010). High isotope fractionations during sulfate reduction in a low-sulfate euxinic ocean analog. Geology, 38(5), 415–418.
    [Google Scholar]
  5. Fike, D. A., Bradley, A. S., & Rose, C. V.
    (2015). Rethinking the ancient sulfur cycle. Annual Review of Earth and Planetary Sciences, 43, 593–622.
    [Google Scholar]
  6. He, K., Zhang, S., Mi, J., & Hu, G.
    (2014). The speciation of aqueous sulfate and its implication on the initiation mechanisms of TSR at different temperatures. Applied geochemistry, 43, 121–131.
    [Google Scholar]
  7. Jenden, P. D., Titley, P. A., & Worden, R. H.
    (2015). Enrichment of nitrogen and 13C of methane in natural gases from the Khuff Formation, Saudi Arabia, caused by thermochemical sulfate reduction. Organic Geochemistry, 82, 54–68.
    [Google Scholar]
  8. Li, P., Hao, F., Guo, X., Zou, H., Zhu, Y., Yu, X., & Wang, G.
    (2016). Origin and distribution of hydrogen sulfide in the Yuanba gas field, Sichuan Basin, Southwest China. Marine and Petroleum Geology, 75, 220–239.
    [Google Scholar]
  9. Machel, H. G.
    (2001). Bacterial and thermochemical sulfate reduction in diagenetic settings—old and new insights. Sedimentary Geology, 140(1–2), 143–175.
    [Google Scholar]
  10. Meshoulam, A., Ellis, G. S., Ahmad, W. S., Deev, A., Sessions, A. L., Tang, Y., Adkins, J.F., Jinzhong, L., Gilhooly, W.P.III, Aizenshtat, Z., & Amrani, A.
    (2016). Study of thermochemical sulfate reduction mechanism using compound specific sulfur isotope analysis. Geochimica et Cosmochimica Acta, 188, 73–92.
    [Google Scholar]
  11. Worden, R. H., & Smalley, P. C.
    (1996). H2S-producing reactions in deep carbonate gas reservoirs: Khuff Formation, Abu Dhabi. Chemical Geology, 133(1–4), 157–171.
    [Google Scholar]
  12. Worden, R. H., Smalley, P. C., & Oxtoby, N. H.
    (1995). Gas souring by thermochemical sulfate reduction at 140 C. Aapg Bulletin, 79(6), 854–863.
    [Google Scholar]
  13. Zhang, T., Ellis, G. S., Wang, K. S., Walters, C. C., Kelemen, S. R., Gillaizeau, B., & Tang, Y.
    (2007). Effect of hydrocarbon type on thermochemical sulfate reduction. Organic Geochemistry, 38(6), 897–910.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.2021623001
Loading
/content/papers/10.3997/2214-4609.2021623001
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error