摘要:
中国南方扬子地区早寒武世早期,低等(水生)植物及动物群发育,沉积了一套富含黑色碳质泥岩、页岩及石煤的地层,为该区古生界最好的烃源岩层系之一。中上寒武统也有一定的暗色石灰岩烃源岩发育。估计扬子地区寒武系烃源岩的总体积至少可达4000×104km3。烃源岩有机质丰度高,属好-较好烃源岩。虽然烃源岩热演化程度普遍较高,属成熟-过成熟,但仍具有较大的生烃能力。如果有较好的保存条件,扬子地区寒武系则具有较好的勘探远景。根据石油地质条件综合分析,中下扬子的长江沿线地区是最为有利的勘探前景地区。
Abstract:
During the early Cham brian,here were well-developed lower plants hydrobios and animals group-rich;and deposited black carbonic and muddy shale and carboid whichis one of the best formations containing source rock. Moreover,there is also well-developed another source rock rich-comprising dark limestone. The total volume of the Cambrian source rock in Yangtze region is evaluated to beat least 4000×104km3,and the abundance of organic source rock is much high.Although the thermal evolution of the source rock is generally great,belonging to the mature or over-mature,it still has a better potential producing hydrocarbon If there is a better preservative condition,the Cambrian formation in Yangtze rigion is a better prospective area,and according to the combining analysis for the petroleum geological condition,the middle and lower reaches of the Yangtze river is best exploratory prospective area.
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