Title |
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Origins of hydrocarbons in the Sagara oil field, central Japan
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Creator |
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Accessrights |
open access |
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The definitive version is available at www.blackwell-synergy.com
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Subject |
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Other
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Sagara oil field
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Other
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SDP
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Other
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hydrocarbons
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free gas
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in situ fluid
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carbon isotope
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thermogenic origin
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Other
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microbial origin
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NDC
438.2
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Description |
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Abstract
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We collected free-gas and in situ fluid samples up to a depth of 200.6 m from the Sagara oil field, central Japan (34°44′N, 138°15′E), during the Sagara Drilling Program (SDP) and measured the concentrations and stable carbon isotopic compositions of CH4 and C2H6 in the samples. A combination of the CH4/C2H6 ratios with the carbon isotope ratios of methane indicates that the hydrocarbon gases are predominantly of thermogenic origin at all depths. The isotope signature of hydrocarbon gases of δ13CCH4 < δ13CC2H6 suggests that these gases in the Sagara oil field are not generated by polymerization, but by the decomposition of organic materials.
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Publisher |
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Blackwell Publishing
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/29654
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Relation |
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URI
http://www.blackwell-synergy.com
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isVersionOf
DOI
https://doi.org/10.1111/j.1440-1738.2006.00528.x
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Journal |
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Island Arc
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Volume Number15
Issue Number3
Page Start285
Page End291
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File |
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Oaidate |
2023-07-26 |