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地质学报  2006 

鄂尔多斯盆地西峰油田原油地球化学特征及其成因

, PP. 301-310

Keywords: 鄂尔多斯盆地,原油,生物标志化合物,组成和分布特征,碳同位素,成因

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Abstract:

通过对鄂尔多斯盆地西峰油田原油进行系统地采样和高分辨率的GC-MS、IRMS分析,研究了原油的生物标志化合物和碳同位素组成特征,并且进行了油源对比,探讨了其成因。研究资料指示了所研究原油属于同一成因类型;原油有机母质为菌藻类和高等植物,特别是高等植物为原油的形成作出了贡献;原油形成于弱还原和淡水或微咸水环境;原油均为成熟原油;原油地球化学特征和上三叠统延长组长7油层组具有亲缘关系,反映了原油主要来源于长7油层组。这些研究结果为盆地的石油勘探提供了科学依据。

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