ABSTRACT

In recent years, a certain scale Chang 8 reservoirs has been discovered in the Xiaoxian area, on which little research has been done. Therefore, further geochemical characteristics and sources of crude oil need to be explored. By using the gas chromatography-mass spectrometry method, it is concluded that the geochemical characteristics of Chang 8 crude oil are contrary to local Chang 7 source rocks. Under such circumstances, comparing the relative content of 17α(H)-C₃₀ diahopane (C₃₀*/C₃₀ hopane) with the Chang 7 hydrocarbon generating center near the study area, it is found that Chang 8 crude oil was more likely to come from the Qingyang-Xifeng area.

中文翻译：

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鄂尔多斯盆地西南缘小县地区长8原油的地球化学特征与来源

摘要

近年来，在孝县地区发现了一定规模的长8油藏，但鲜有研究。因此，需要探索更多的地球化学特征和原油来源。通过气相色谱-质谱法，得出长8原油的地球化学特征与局部长7烃源岩相反。在这种情况下，比较17α（H）-C的相对含量₃₀ diahopane（C ₃₀ * / C ₃₀藿）与研究区域附近的长7烃产生中心，可知长8原油更可能来自庆阳-西峰地区。