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Carbon Isotopic Composition and Yield of Gaseous Hydrocarbon by Oil Hydrous Pyrolysis in Rock Medium
Author(s): 
Pages: 505-509
Year: Issue:  3
Journal: ACTA SEDIMENTOLOGICA SINICA

Keyword:  原油热模拟实验气体组份产气率碳同位素催化作用;
Abstract: 采用高温高压热模拟实验方法,开展了原油在砂岩和火成岩储层介质中的加水裂解生气模拟实验研究.结果表明,原油开始大量裂解的温度是400℃,随模拟温度增加,甲烷相对含量增大,乙烷以上重烃气尤其是丙烷相对含量减小.其中砂岩的油水混合物裂解生气主要发生在450~500℃之间,生气窗范围小,对应的烃气产率高,火成岩的油水混合物裂解生气主要发生在450~600℃之间,生气窗范围大,对应的烃气产率小.模拟烃气的组分碳同位素分馏显著,随模拟温度增加呈变重趋势.在裂解生气过程中,水解加氢和催化作用对烃气的组成、产率和碳同位素分布有重要影响.
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