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大港探区的古生界已经获得了重大突破,在孔西地区的孔古3、孔古4井获得了以古生界为烃源岩的工业油气流。本文重点从上、下古生界烃源岩的类型、丰度、热演化程度和显微组分特征等方面,指出上古生界煤系地层具有形成煤成油的良好条件,奥陶系碳酸盐岩也是重要的生油岩,其中马家沟组和峰峰组是主要的生烃贡献者;同时,古生界具有基本独立的压力系统,表明古生界具具有良好的勘探前景。
The Paleozoic of the Dagang Exploration Area has made a major breakthrough. In the Konggu 3 and Kongku 4 of the Kongxi area, the industrial oil and gas flow with the Paleozoic as the source rock was obtained. This paper focuses on the type, abundance, degree of thermal evolution and microscopic composition of source rocks of the Upper Paleo- and Lower Paleozoic. It is pointed out that the Upper Paleozoic coal measures strata have the good conditions for forming coal into oil, Acid salt rock is also an important oil source rock. Majiagou Formation and Fengfeng Formation are the major contributors to hydrocarbon generation. Meanwhile, the Paleozoic has a basically independent pressure system, indicating that the Paleozoic has a good exploration prospect.