Variations of yields and molecular and isotopic compositions in gases generated from Miocene strata of the Carpathian Foredeep (Poland) as determined by hydrous pyrolysis

Kotarba, Maciej J.; Bilkiewicz, Elżbieta; Bajda, Tomasz; Waliczek, Marta; Jurek, Krzysztof

doi:10.1007/s00531-022-02206-0

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Cited by 4 publications

References 103 publications

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Water-coal reaction and hydrochemical evolution in the process of coal metamorphism: Based on water-coal thermal simulation experiment

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Water-coal reaction and hydrochemical evolution in the process of coal metamorphism: Based on water-coal thermal simulation experiment

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Tang

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Environmental perturbations around the Badenian/Sarmatian (Middle Miocene) boundary in the Central Paratethys: Micropalaeontological and organic geochemical records

Peryt,

Gedl,

Jurek

et al. 2024

Palaeogeography, Palaeoclimatology, Palaeoecology

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Unrecognized extensive charge of microbial gas in the Junggar basin

Zhang,

Cai,

Mei

et al. 2024

Sci Rep

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Different from the Qaidam basin with about 320 billion m3 microbial gas, only limited microbial gases were found from the Junggar basin with similarly abundant type III kerogen. To determine whether microbial gases have not yet identified, natural gas samples from the Carboniferous to Cretaceous in the Junggar basin have been analyzed for chemical and stable isotope compositions. The results reveal some of the gases from the Mahu sag, Zhongguai, Luliang and Wu-Xia areas in the basin may have mixed with microbial gas leading to straight ethane to butane trends with a “dogleg” light methane in the Chung’s plot. Primary microbial gas from degradation of immature sedimentary organic matter is found to occur in the Mahu sag and secondary microbial gas from biodegradation of oils and propane occurred in the Zhongguai, Luliang and Beisantai areas where the associated oils were biodegraded to produce calcites with δ13C values from + 22.10‰ to + 22.16‰ or propane was biodegraded leading to its 13C enrichment. Microbial CH4 in the Mahu sag is most likely to have migrated up from the Lower Wuerhe Formation coal-bearing strata by the end of the Triassic, and secondary microbial gas in Zhongguai and Beisantan uplifts may have generated after the reservoirs were uplifted during the period of the Middle and Late Jurassic. This study suggests widespread distribution of microbial gas and shows the potential to find large microbial gas accumulation in the basin.

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Variations of yields and molecular and isotopic compositions in gases generated from Miocene strata of the Carpathian Foredeep (Poland) as determined by hydrous pyrolysis

Cited by 4 publications

References 103 publications

Water-coal reaction and hydrochemical evolution in the process of coal metamorphism: Based on water-coal thermal simulation experiment

Water-coal reaction and hydrochemical evolution in the process of coal metamorphism: Based on water-coal thermal simulation experiment

Environmental perturbations around the Badenian/Sarmatian (Middle Miocene) boundary in the Central Paratethys: Micropalaeontological and organic geochemical records

Unrecognized extensive charge of microbial gas in the Junggar basin

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