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资福寺洼陷古近系盐湖沉积体系发育有沙市组、新沟咀组下段烃源岩。地化特征分析表明,新沟咀组下段泥岩层和Ⅱ油组有机质丰度较高,达到差~中等级别,新沟咀组下段Ⅲ油组和沙市组上段为差烃源岩;沙市组上段~新沟咀组下段烃源岩有机质类型主要为Ⅱ2~Ⅲ型,多数为Ⅲ型;Ⅰ、Ⅱ油组成熟度较低,为成熟早期,Ⅲ油组开始进入成熟晚期。烃源岩评价结果表明,新沟咀组下段泥隔层和Ⅱ油组具有较高的生烃潜力。
The Paleogene Salt Lake sedimentary system in the Zafu Temple Depression is characterized by the source rocks of the Lower Member of Shashi Formation and Xingouzui Formation. The analysis of geochemical characteristics shows that the organic matter abundance of mudstone layer and oil group Ⅱ in the lower part of Xingouzui Formation is relatively high and reaches poor to middle level, and the upper part of Ⅲ Oil Group and Shashi Formation in the lower part of Xingouzui Formation is poor source rock. The organic matter types of the source rocks in the lower part of Xingtouzui Formation are mainly Ⅱ2 ~ Ⅲ types and most of them are Ⅲ types. The maturity of Ⅰ and Ⅱ oil groups is low, which is the early mature stage, and the Ⅲ oil group begins to enter the late mature stage. The evaluation results of source rocks show that the lower part of the Xingouzui Formation has high hydrocarbon potential for hydrocarbon generation in mud compartment and oil group II.