Unlocking High CO2 Gas Fields in the Central Song Hong Basin, Vietnam: Implication for Carbon Storage

Authors

  • Vo Thi Hai Quan

    Geochemical Department, Vietnam Petroleum Institute, Ho Chi Minh City 700000, Vietnam

DOI:

https://doi.org/10.30564/jees.v8i4.13011
Received: 12 January 2026 | Revised: 5 March 2026 | Accepted: 10 March 2026 | Published Online: 7 April 2026

Abstract

CO2-dominated gases in the A, B, C pools were resulted from gas chromatography analysis in the central Song Hong basin. These data were integrated with additional information on regional geology, properties of source rocks and reservoirs from Rock-Eval pyrolysis and petrology data in the Pliocene and Pleistocene formations that were used to imply the impacts of geological features on the origin of gases. Compositions of gases comprise the dominance of CO2, followed by C1, small contents of N2, minor contents of C2 and absence of C3–C8, H2S, He, Ar, H2, and CO. These gases could be generated from deeper sources and probably small amounts of them released from shallow sources that are strongly impacted by the rapid sedimentation rate, biochemical and geothermal alteration phases. The main period of gas migration and entrapment in the A, B, C fields could be in the period of Pliocene–Pleistocene. The dominance of CO2 contents in these gas reservoirs mainly came from the dissolving carbonate in sandstone reservoirs, interacting between feldspar and clay minerals with carbonate cement, the process of CH4 generation in the early stage of sediment diagenesis at shallow depths. Understanding where the CO2 comes from and regional geological activities are useful for unlocking these high CO2 accumulations and finding out suitable geological formations for CO2 storage. Stratigraphic correlation shows the consistent properties of the reservoirs including geological units, high pore spaces, carbonate cements, and high pressures, which are suitable geological formations for potential CO2 storage.

Keywords:

CO2; Gas Field; Carbon Capture and Storage (CCS); Gas Composition; Carbonate; Song Hong Basin

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How to Cite

Quan, V. T. H. (2026). Unlocking High CO2 Gas Fields in the Central Song Hong Basin, Vietnam: Implication for Carbon Storage. Journal of Environmental & Earth Sciences, 8(4), 23–33. https://doi.org/10.30564/jees.v8i4.13011

Issue

Vol. 8 , Iss. 4 (April 2026): In Progress

Article Type

Article

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Copyright © 2026 Vo Thi Hai Quan

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This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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