关键词: 华北盆地, 南部地区, 油气地质条件, 二次生烃, 类比法, 资源评价, 勘探方向

Abstract:

There are 5 sets of source rocks in the south of North-China Bain.Among them,the Permian-Carboniferous source rock is the key.There are good conditions for secondary hydrocarbon-generation in the sags with thick Tertiary and Quaternary systems.In this area,weathering crust of the Paleozoic carbonate and the Permian sandstone are the major reservoir beds,and the Carboniferous bauxitite of Taiyuan Formation and Benxi Formation are high-quality capping beds.There developed a great variety of structural traps and stratigraphic traps in this area.233 traps with total area of 4225.65 square kilometers have been discovered. 10 promising sags were chosen as the resource assessment units.The analogy method was taken as a primary assessment method,and the basin simulation method was applied in Luyi Sag and Huangkou Sag.The total expected oil in place value of the 10 sags is 352.6 million tons,and the total expected gas in place value is up to 160.6 billion cubic meters.The comprehensive assessment shows that Shangqiu Sub-sag and the middle and west of Huangkou Sub-sag in Huangkou Sag,the slope play of Huangkou Sub-sag toward Dangshan salience and Dalian Anticline of Luyi sag are the promising exploration targets.

Key words: North-China Basin, south area, oil and gas geologic condition, secondary hydrocarbon-generation, analogy method, resource assessment, exploration prospect