收稿日期: 2010-11-24
修回日期: 2011-01-25
网络出版日期: 2011-02-10
基金资助
中国科学院重要方向项目(编号：KZCX2-YW-Q05-03)资助.
Carbon Isotopic Characteristics of Hydrocarbons and CO2 of H2S-rich Natural Gases and Their Origin in Northeastern Sichuan Basin
Received date: 2010-11-24
Revised date: 2011-01-25
Online published: 2011-02-10
王万春, 张晓宝, 罗厚勇, 李立武 . 川东北地区富含H2S天然气烃类与CO2碳同位素特征及其成因[J]. 天然气地球科学, 2011 , 22(1) : 136 -143 . DOI: 10.11764/j.issn.1672-1926.2011.01.136
Extensive investigation on geochemical characteristics,origin and source of H2S-rich natural gas in the northeastern Sichuan basin was processed and abundant documentation was accumulated in resent years.But a great attention has been paid and controversy existed all along on the origin and source of the natural gas in the northeastern Sichuan basin because of the specific geological environment and the complicated condition of natural gas formation and evolvement of the area.The correlations between the content of hydrogen sulphide and the components of hydrocarbons,the carbon isotopic compositions of methane,ethane and carbon dioxide indicate that the H2S-rich natural gases reservoired in the Feixianguan and Changxing Formations of the northeastern Sichuan basin are the product of oil cracking under the catalysis of sulphate and possibly derived from the Silurian source rocks;and that the generation of 13C-riched CO2 in the H2S-rich natural gas is related to the reduce of H2Scontent in natural gas and is the result of H2S corrosion on reservoir carbonate.
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