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采集富县东部牛武地区上三叠统延长组长4+5、长6、长7及长8层段黑色泥岩和泥页岩作为样品,测试干酪根显微组分、岩石热解参数和可溶有机质组成特征等地球化学指标,确定研究区各个潜在烃源层分散有机质的类型。有机质类型最好的是长7和长8烃源岩,有机质类型主要为Ⅰ型(腐泥型)—Ⅱ1(腐植-腐泥型);长6烃源岩有机质类型主要为Ⅱ1(腐植-腐泥型)。
The black mudstone and shale samples of 4 + 5, 6, 7 and 8 layers of Upper Triassic Yanchang Formation in Niuwu area of eastern Fuxian were collected as samples to test kerogen microstructure, rock pyrolysis parameters and Soluble organic composition and other geochemical indicators to determine the potential hydrocarbon source layer of the study area scattered organic matter types. The best organic matter types are Chang 7 and Chang 8 source rocks, and the organic matter types are mainly Type Ⅰ (sapropelic) -Ⅱ1 (humic-sapropelic). The organic types of Chang 6 source rock are mainly Ⅱ1 Mud type).