The migration fractionation: an important mechanism in the formation of condensate and waxy oil

The migration fractionation: an important mechanism in the formation of condensate and waxy oil
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运移分馏:凝析油和含蜡油形成的重要机制

DOI:
10.1007/bf03182916
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发表时间:
2000-07
期刊:
Chinese Science Bulletin, 45 (14), 1341-44.
影响因子:
--
通讯作者:
Zhang Shuichang
Zhang Shuichang
中科院分区:
其他
文献类型:
--
作者:
Zhang Shuichang

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断层引起的储集层内压力释放和外部过量干气的注入可能导致油气相的形成。由于化合物在两相流中的分配系数不同,低分子量组分更容易溶解在气相中,产生凝析油,而高分子量组分则保留在油相中,产生含蜡原油积累。分馏过程导致了脂肪/芳烃比值、分子化合物分布和碳同位素比值的广泛成分变化,传统上认为这些比值与源区有机质或热成熟度有关。
Fault-initiated pressure release within reservoirs and the injection of external excessive dry gas may result in occurrence of oil and gas phases. Because of different partitioning coefficients of compounds in two phase flow, lower-molecular-weight components are easier to dissolve in gas phase, yielding condensates, while higher-molecular-weight components are retained in the oil phase, yielding waxy oil cumulations. The fractionation process causes extensive compositional variability in aliphatic/aromatic hydrocarbon ratios, molecular compound distributions and carbon isotope ratios that are traditionally considered to be related to the source organic matter or the thermal maturity.
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