首页|中国大气田烷烃气碳同位素组成的若干特征

中国大气田烷烃气碳同位素组成的若干特征

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勘探开发大气田是一个国家快速发展天然气工业的重要途径.1991年至2020年,中国新探明大气田68个,促进2020年产气1 925x108m3,成为世界第4产气大国.基于中国70个大气田的1 696个气样组分和烷烃气碳同位素组成数据,获得中国大气田烷烃气碳同位素组成特征:①δ13C1、δ13C2、δ13C3和δ13C4的最轻值和平均值,随分子中碳数逐增而变重,而δ13C1、δ13C2、δ13C3和δ13C4的最重值,随分子中碳数逐增而变轻.②中国大气田δ13C1值的分布区间为-71.2‰～-11.4‰,其中生物气δ13C1值的分布区间为-71.2‰～-56.4‰;油型气δ13C1值的分布区间为-54.4‰～-21.6‰;煤成气δ13C,值的分布区间为-49.3‰～-18.9‰;无机成因气δ13C1值的分布区间为-35.6‰～-11.4‰;根据这些数据编制了中国大气田的δ13C1值尺图.③中国天然气δ13C1值的分布区间为-107.1‰～-8.9‰,其中生物气δ13C1值为-107.1‰～-55.1‰;油型气δ13C1值为-54.4‰～-21.6‰;煤成气δ13C1值为-49.3‰～-13.3‰;无机成因气δ13C1值为-36.2‰～-8.9‰;根据上述数据编制了中国天然气的δ13C1值尺图.
Characteristics of carbon isotopic composition of alkane gas in large gas fields in China
Exploration and development of large gas fields is an important way for a country to rapidly develop its natural gas industry.From 1991 to 2020,China has discovered 68 new large gas fields,boosting its annual gas output to 1 925×108 m3 in 2020,making it the fourth largest gas producing country in the world.Based on 1696 molecular components and carbon isotopic composition data of alkane gas in 70 large gas fields in China,the characteristics of carbon isotope composition of alkane gas in large gas fields in China were obtained.The lightest and average values of δ13C1,δ13C2,δ13C3 and δ13C4 become heavier with increasing carbon number,while the heaviest values of δ13C1,δ13C2,δ13C3 and δ13C4 become lighter with increasing carbon number.The δ13C1 values of large gas fields in China range from-71.2‰ to-11.4‰(specifically,from-71.2‰ to-56.4‰ for bacterial gas,from-54.4‰ to-21.6‰ for oil-related gas,from-49.3‰ to-18.9‰ for coal-derived gas,and from-35.6‰ to-11.4‰ for abiogenic gas).Based on these data,the δ13C1 chart of large gas fields in China was plotted.Moreover,the δ13C1 values of natural gas in China range from-107.1‰ to-8.9‰,specifically,from-107.1‰ to-55.1 ‰ for bacterial gas,from-54.4‰ to-21.6‰ for oil-related gas,from-49.3‰ to-13.3‰ for coal-derived gas,and from-36.2‰ to-8.9‰ for abiogenic gas.Based on these data,the δ13C1 chart of natural gas in China was plotted.

Chinalarge gas fieldbacterial gasoil-related gascoal-derived gasabiogenic gasalkane gascarbon isotopic compositionδ13C1 chart

戴金星、倪云燕、龚德瑜、黄士鹏、刘全有、洪峰、张延玲

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中国石油勘探开发研究院,北京 100083

中国石油大学(北京),北京 102249

北京大学,北京 100871

中国 大气田 生物气 油型气 煤成气 无机成因气 烷烃气 碳同位素组成 δ13C值尺

国家自然科学基金国家自然科学基金面上项目中国石油油气和新能源分公司科技专项国家自然科学基金石油化工联合基金集成项目

41472120422721882023YQX10101U20B6001

2024

10.11698/PED.20230669

石油勘探与开发
中国石油天然气股份有限公司勘探开发研究院 中国石油集团科学技术研究院

石油勘探与开发

CSTPCD北大核心
影响因子：4.977
ISSN：1000-0747
年,卷(期)：2024.51(2)
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