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Hydrocarbon–Helium Coupled Accumulation Processes and Formation Mechanisms of Helium-Rich Gas Fields in the Southwestern Ordos Basin
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DOI：10.1016/j.petlm.2026.04.019.png)
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Abstract
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• Couple helium accumulation with hydrocarbon gas charging to identify helium enrichment patterns and their differential characteristics. • Comprehensively integrate inorganic and hydrocarbon gas geochemical data with basin evolution, tectonic development to determine helium enrichment in SW Ordos Basin. • Reveals the transport and boosting effect of hydrocarbon gases on helium accumulation; differential charging of such gases in Majiagou Formation, SW Ordos Basin is the main cause of helium's differential enrichment. • Infer fault development and charging process differences cause gas-water relationship variations; both are secondary causes of helium enrichment difference in SW Ordos Basin.
Keywords:
Helium
geochemistry
isotope analysis
Ordos Basin
enrichment mechanism
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