HUANG Bao-jia, XIAO Xian-ming. Characteristics and Generation-Evolution Model of Marine Biogas in the Yinggehai Basin[J]. Acta Sedimentologica Sinica, 2002, 20(3): 462-468.
| Citation:
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HUANG Bao-jia, XIAO Xian-ming. Characteristics and Generation-Evolution Model of Marine Biogas in the Yinggehai Basin[J]. Acta Sedimentologica Sinica, 2002, 20(3): 462-468.
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Characteristics and Generation-Evolution Model of Marine Biogas in the Yinggehai Basin
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State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences, Guangzhou,510640
- Received Date: 2001-07-30
- Rev Recd Date:
2001-10-24
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Abstract
There is great biogas potential in the Guaternary and Pliocene of the Yinggehai Basin. The compositions of gases f ound in the Basin are mainly methane and nitrogen. These biogases are characterized by high dry coefficients(C1/C1-5ratio)of 0.99, light carbon isotopes of methane(-65.57 %!-63.14 %）， especially heavy hydrogen isotopic values("Dc1%）of -172. 1 %!-108. 5 %. Geochemical data show that the Guaternary and Pliocene mud has the meanTOC value of 0.4 % and contains abundant organic matter which can be degraded by bacteria. The organic matter mainly consists of coarse-fi ber,semi-fiber and protein.Noticeably,it contains a high content of amino acid that is an inter mediate product during the f or mation process of biogas. This indicates that the mudstone in the Guaternary and Pliocene of the Basin is f avourable to biogas f or mation and is good biogas sourcerock.The data of modeling eXperi ment,combined with the gas measurement log and geotemperat ure gradient data of the basin,can be used to predict that the main stage of bio-gas generation is bet ween 35 C and 65 C and the death temperat ure of bio-gases is about 85 C(eCuivalent with the burial depth of around 1 900 min the Basin）.Finally，we suggest the generation-evolution model of marine biogas in the Yinggehai basin.
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