川中地区须家河组天然气地球化学特征
发布时间：2018-09-06 14:59
【摘要】：为探明川中地区须家河组天然气特征、成因及来源,对该区须家河组天然气组分及碳、氢同位素特征进行了分析。结果表明:川中地区须家河组天然气以甲烷为主,除元坝、通南巴等地区外,主体表现为湿气特征,干燥系数小于0.95,天然气干燥系数主要受烃源岩成熟度的控制。δ~(13)C_1值介于-43.8‰~-29.3‰之间,δ~(13)C_2值介于-35.4‰~-24.3‰之间,δD_(CH_4)值介于-179‰~-152‰之间。天然气成因鉴别及气源对比结果表明:川中地区大部分气田须家河组天然气为煤成气,来源于须家河组煤系烃源岩。川中地区大部分区域仅少数天然气样品发生丙烷、丁烷的碳同位素部分倒转,主要由同源不同期气的混合所致。
[Abstract]:In order to find out the characteristics, origin and source of natural gas in Xujiahe formation in central Sichuan, the composition, carbon and hydrogen isotopic characteristics of natural gas in Xujiahe formation are analyzed. The results show that the main natural gas of Xujiahe formation in central Sichuan is methane, except Yuanba and Tongnanba, the main body is wet gas. The drying coefficient is less than 0.95, and the drying coefficient of natural gas is mainly controlled by the maturity of source rocks. The 未 ~ (13) C _ (1) C _ (1) is between -43.8 鈥，
本文编号：2226705
[Abstract]:In order to find out the characteristics, origin and source of natural gas in Xujiahe formation in central Sichuan, the composition, carbon and hydrogen isotopic characteristics of natural gas in Xujiahe formation are analyzed. The results show that the main natural gas of Xujiahe formation in central Sichuan is methane, except Yuanba and Tongnanba, the main body is wet gas. The drying coefficient is less than 0.95, and the drying coefficient of natural gas is mainly controlled by the maturity of source rocks. The 未 ~ (13) C _ (1) C _ (1) is between -43.8 鈥，
本文编号：2226705
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