北黄海盆地中生界烃源岩评价

EVALUATION OF MESO-CENOZOIC HYDROCARBON SOURCE ROCKS IN NORTH YELLOW SEA BASIN

北黄海盆地位于黄海海域北部,为中新生代盆地,勘探程度较低,尚处于早期评价阶段。通过对盆地东部钻井烃源岩有机质丰度、有机质类型和有机质成熟度等有机地化参数分析,认为:上侏罗统烃源岩是具一定潜力的中等烃源岩,也是目前发现原油的油源岩和有效烃源岩;下白垩统烃源岩是本区目前最好的烃源岩,但成熟度偏低,应作为具有一定潜力的潜在油源岩或有效烃源岩加以重视。此次研究对该地区烃源岩的认识起了重要的补充和促进作用,对油气勘探也具有很好的指导意义。

The North Yellow Sea Basin, a Meso--Cenozoic basin, which is located in northern Yellow Sea, is in the earlier stage of evaluation according to its low degree of exploration. This paper analyzed the richness, type and maturity of the organic matter of the well drilling source rocks in eastern of the basin. The results indicate that Upper Jurassic source rock is the chief one which is supposed to be most potential, in addition it is the effective source rock of crude oil discovered at present. And Lower Cretaceous source rock is the best one in this area, but its maturity is lower, so it must be taken consideration into as potential oil source rocks. This research is an important complement and enhancement to source rock in understanding there, and gives well instruction to hydrocarbon exploration as well.