摘要
根据“陆缘扩张”观点，扩张型陆缘演化阶段的三个构造旋回与珠江口盆地的油气生成和聚集密切相关。第一扩张旋回中形成的始新统文昌组泥岩是珠江口盆地的主要烃源岩。由文昌组排出的油气，经运移上升至第三扩张旋回中形成的中中新统韩江组泥岩盖层之下。运移过程中，油气主要进入由第二扩张旋回中形成的上渐新统珠海组和下中新统珠江组为储层的有利圈闭中。因此，珠江组和珠海组是珠江口盆地的重要目的层，而“拗中隆”及生物礁－滩则是钻探的主要对象。
he three tectonic cycles of spreading continental margin evolutionary period are closely related to the gas and oil genesis and concentration in the Zhujiang River Mouth Basin, based on the point of view of'continental margin spreading'.The first spreading cycle resulted in the formation of Wenchang mudstone, Eocene,which is the important and main source rock of the basin.After migrating,the hydrocarbon that was excluded from the mudstone went up to the layer beneath the covering of Hanjiang mudstone, Middle Miocene, which was formed during the third cycle.During migration, the oil and gas have mainly gone into those advantageous traps where reservoirs are of Zhuhai Formation and Zhujiang Formation,formed during the second spreading cycle. So both formations are important target layers for exploration, and the heights within sags and the massive bioreef-banks are the main targets for drilling.
出处
《热带海洋》
CSCD
1995年第3期8-15,共8页
关键词
陆缘扩张
含油气性
珠江口盆地
油气藏
continental margin spreading, hydrocarbon potential, Zhujiang River Mouth Basin
