SUPERIMPOSITION AND MODIFICATION OF THE MESOZOIC AND PALEOZOIC BASINS AND MULTI-STAGES OF HYDROCARBON ACCUMULATION WITH MULTIPLE SOURCE ROCKS IN LOWER YANGTZE AREA
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摘要: 下扬子区是一个经历了多期构造运动改造的叠合盆地,2种构造体制、2个世代盆地造就了下扬子地区复杂的构造格局。朱家墩气田等4种典型油气藏表明,中古生界在地史上曾经发生过大规模的油气生成、运移和聚集成藏,本区确实存在多源、多期成藏,立足于寻找有中上古生界地质实体、具备后期保存条件的地区,一定能实现中古生界油气勘探的重大突破。Abstract: Lower Yangtze area is a superimposition basin modified by multiple tectonic movement.It showed complicated structural pattern as a result of existence of two tectonic mechanisms and two generations of basins.Four typical oil and gas fields,such as Zhujiadun gasfield,indicated that a large scale of hydrocarban generation,migration and accumulation were occurred during Mesozoic and Paleozoic.There are reservoirs with multiple sources and repeatedly accumulation in the area.The area with Upper Paleo-zoic and Mesozoic geological bodies and good preservation condition is potential target for petroleum exploration.
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Key words:
- Lower Yangtze area /
- superimposed basin /
- Indosinian movement /
- hydrocarbon accumulation
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