收稿日期: 2003-06-24
修回日期: 2003-10-20
网络出版日期: 2003-12-20
基金资助
国家重点基础研究发展规划项目(编号：2001CB209102)，国家自然科学基金项目(编号：40072049)联合资助.
ANALYSES OF THE CARBON ISOTOPIC GEOCHEMISTRY OF THEMIX-SOURCED SHALLOW RESERVOIR NATURAL GAS IDENTIFICATION
Received date: 2003-06-24
Revised date: 2003-10-20
Online published: 2003-12-20
王万春，刘文汇， 刘全有 . 浅层混源天然气判识的碳同位素地球化学分析[J]. 天然气地球科学, 2003 , 14(6) : 469 -473 . DOI: 10.11764/j.issn.1672-1926.2003.06.469
Because of the co-effects of the bio-chemical degradation, the thermal degradation and the tectonic activity, natural gases of various origins tend to accumulate in one shallow reservoir and form mix-sourced shallow gas reservoirs in the oil and gas-bearing basins. In this paper, the component and carbon isotopic distribution characteristics of the original shallow gases (i.e., biogenic gas and low-temperature thermolgenic gas) and the secondary originated shallow gases (i.e., secondary migrated gas and bio-degraded gas) have been expounded, the main factors which affect the carbon isotopic compositions of the mix-sourced shallow reservoir gases have been discussed, and the geochemical indicators for the differentiation of natural gases in the mix-sourced shallow gas reservoirs have been analyzed.
Key words： Natural gas; Carbon isotope; Shallow reservoir; Mixed sources.
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