摘要
古近系文昌组-恩平组是珠江口盆地油气勘探的重要层位。通过对烃源岩展布、构造活动强弱、输导体类型、储盖条件、圈闭种类的研究表明，烃源岩分布控制油气富集程度，构造活动制约油气聚集能力，输导体系制约油气聚集能力，储集条件影响油气储量大小，圈闭发育决定油气保存结果。40-15Ma时期，文昌组-恩平组大量生烃，具备形成早期油气藏的条件；中中新世开始的东沙运动使得文昌组-恩平组早期形成的油气藏发生调整，于晚期再次成藏；中中新世晚期，恩平组SQ7层序开始生烃，利于晚期成藏。文昌组-恩平组的成藏模式分为早期成藏、早期成藏-晚期补充以及晚期成藏3种。
Paleogene Wenchang-Enping formation is the important horizons for hydrocarbon exploration of Zhujiangkou basin.The research on the distribution of source rocks,tectonic activity strength,pathway systems types,reservoircover conditions and trap types has been carried out.The results indicate the hydrocarbon enrichment degree is controlled by source rocks distribution,the hydrocarbon accumulation capacity is constrained by tectonic activity and pathway systems.The accumulation conditions have the impact on the size of oil and gas reserves and the traps development determines the preservation result.At 40~15 Ma period,a large amount of hydrocarbon has been generated,being of the condition of early oil and gas reservoir.Dongsha movement which began in the Middle Miocene makes the early formed hydrocarbon reservoirs from Wenchang- Enping change,and forms the hydrocarbon reservoirs at late period.At the late middle Miocene,SQ7 sequence of Enping formation started to generate hydrocarbon,which was good for late hydrocarbon accumulation.Therefore,the hydrocarbon accumulation pattern of Wenchang-Enping formation can be divided into three kinds:the early hydrocarbon accumulation pattern,early accumulation-late advanced supplementary pattern and late hydrocarbon accumulation pattern.
出处
《石油地质与工程》
CAS
2015年第5期25-30,145,共6页
Petroleum Geology and Engineering
基金
国家科技重大专项(2011ZX05030-002-005)
关键词
珠江口盆地
AB凹陷
成藏模式
文昌-恩平组
圈闭
构造活动
Zhujiangkou basin
AB sag
accumulation mode
Wenchang-Enping formation
trap
tectonic activities
