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利用塔里木盆地东部94个气样的烃类气体组成和碳同位素检测资料,与模拟实验资料相结合,进行了下古生界海相烃类气体的成熟度判识、成因类型和气源的综合研究。下古生界烃源气以干气为主,干燥系数>0.9,属海相腐泥型裂解气,并由于没有陆源有机质的影响,而表现为6~(13)C_1偏低、6~(13)C_2-J~(13)C_1,的差值小等特征。根据上元古界～下古生界烃源岩热模实验结果建立了6~(13)C_1-R_0凡回归方程,基本解决了本区天然气的成熟度和气源判识问题,并将天然气划分为4种成因类型。文中还探讨了天然气的多源、多阶复合问题。
Based on the gas composition and carbon isotope data of 94 gas samples from the eastern Tarim Basin and the simulation data, the maturity of the marine hydrocarbon gas in the Lower Paleozoic is analyzed. the study. The Lower Paleozoic hydrocarbon source gas is dominated by dry gas with a drying coefficient of> 0.9. It belongs to the marine sapropel pyrolysis gas and is characterized by low 6 ~ (13) C_1, 6 ~ (13) 13) C_2-J ~ (13) C_1, the difference is small and so on. Based on the results of thermal model experiments from the Upper Proterozoic to lower Paleozoic source rocks, the 6 ~ (13) C_1-R_0 regression equations were established, which basically solved the problem of natural gas maturity and gas source identification in this area. Natural gas Divided into four types of causes. The article also discusses the multi-source, multi-order complex problem of natural gas.