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正确认识研究区烃源岩的分布层位和发育规模,生烃潜力,全面搞清楚研究区的资源结构,将为研究区进行油气勘探提供重要依据,对今后的区带评价和目标选择具有十分重要的意义。通过利用鄂尔多斯西缘南段上古生界煤系泥岩、煤岩的有机地化分析测试资料,并且结合前人研究成果,系统地对研究区古生界烃源岩地质、地球化学特征进行了研究。研究结果表明:按煤系泥岩型烃源岩有机碳丰度标准,太原组、山西组泥岩型烃源岩整体属中等级别烃源岩;按煤岩型烃源岩有机质丰度标准,太原组、山西组煤岩属极好类型烃源岩。太原组、山西组烃源岩的有机质类型以Ⅲ型干酪根为主,均处于高成熟生气阶段。
Correctly understanding the distribution horizon, developmental scale and hydrocarbon generation potential of source rocks in the study area and fully clarifying the resource structure of the study area will provide an important basis for the exploration of oil and gas in the study area and will have a very good value for the future zoning assessment and target selection Significance. By using the data of organic geochemical analysis and testing of the Upper Paleozoic coal measures of the Upper Paleozoic coal measures in the western Ordos Basin and combining with the previous research results, the geological and geochemical characteristics of the Paleozoic source rocks in the study area are systematically studied . The results show that the mudstone source rocks in Taiyuan Formation and Shanxi Formation belong to middle-grade source rocks in total, according to the organic carbon abundance standard of the coal measures mudstone-type source rocks. According to the organic matter abundance standards of coal-derived source rock, Shanxi coal group is an excellent type of source rock. The organic matter types of source rocks in Taiyuan Formation and Shanxi Formation are mainly Type III kerogen, all of which are in high mature and angry stage.