鄂尔多斯盆地旬邑长7烃源岩地球化学特征

Geochemistry of Hydrocarbon Source Rocks of the 7th Member of the Yanchang Formation in Xunyi, Erdos

为了研究鄂尔多斯盆地旬邑地区长7烃源岩地球化学特征及分布规律,采集研究区具有代表性的样品,对其开展各项地球化学实验。结果表明,旬邑地区烃源岩厚度及有机质丰度分布明显受沉积环境的控制,东北部和西北部是长7烃源岩的主要发育区,其有机质丰度较高,有机质类型以Ⅰ-Ⅱ1型为主,热演化程度较高,有机质总体达到成熟阶段,生油潜力大,为研究区主力烃源岩。

Study of geochemistry of hydrocarbon source rocks of the 7th Member of the Yanchang Formation in Xunyi, Erdos indicates that thickness and organic matter abundance of the hydrocarbon source rocks are controlled by sedimentary environment. The most of hydrocarbon source rocks in the 7th Member of the Yanchang Formation are distributed in northeast and northwest and characterized by higher organic matter abundance, higher thermal evolution degree and larger oil generating potential.