收稿日期: 2007-05-23
修回日期: 2007-08-02
网络出版日期: 2007-10-10
基金资助
国家自然科学基金项目（编号：40673018）；国家重点基础研究发展计划项目（编号：2003CB214603）联合资助.
GEOCHEMISTRY OF NATURAL AS AND CRUDE COMPUTATION OF GAS-GENERATED CONTRIBUTION FOR VARIOUS SOURCE ROCKS IN SULIGE GAS FIELD, ORDOS BASIN
Received date: 2007-05-23
Revised date: 2007-08-02
Online published: 2007-10-10
刘全有，刘文汇，徐永昌，李剑，陈孟晋 . 苏里格气田天然气运移和气源分析[J]. 天然气地球科学, 2007 , 18(5) : 697 -702 . DOI: 10.11764/j.issn.1672-1926.2007.05.697
According to measuring chemical composition，stable isotope and noble gas isotope in natural gas from Sulige gas field，Ordos basin，that natural gas is characterized as the higher concentration of hydrocarbon gases enriching in 13C，suggests the gaseous alkanes were derived from humic matter，in combination with the hydrogen isotopes referring the source rocks of natural gas would be deposited in fresh-brackish water.The pathway of natural gas migration in Sulige gas field is principally directed from northeast to southwest，based on the tendency of enrichment in 13C of hydrocarbon gases from southwest to northeast and slight increase of 3He/4He ratios. Based on the 40Ar/36 Ar ratios in natural gas，the K concentration in the source rocks in C-P was calculated，and then the more 65% contributing proportion of coal to gas generati on as a source rock was determined.
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