摘要
应用整体、动态及综合分析方法,重点对珠江口盆地发育演化特征及其对油气成藏地质条件的控制作用进行了系统地分析研究,指出该区在晚白垩纪—早渐新世多幕断陷裂谷阶段,主要沉积充填了始新统文昌组中深湖相和下渐新统河湖沼泽相煤系及湖相2套主要烃源岩;晚渐新世—中中新世裂后断拗转换及热沉降阶段,则主要形成了上渐新统珠海组及下中新统珠江组分布较广的海相砂岩储集层及其储盖组合;而晚中新世后新构造运动及热沉降拗陷阶段,由于构造及断裂活动较强烈,发育了大量NWW向断裂,不仅控制了盆地最终构造格局及展布,亦为深部油气向上覆海相地层和各类局部构造及圈闭中运聚成藏提供了运移通道,而当其与油气生、运聚条件良好配置时,即可构成颇具特色的下生上储、陆生海储的油气成藏组合类型。总之,该区晚中新世以来的新构造运动对盆地最终构造格局形成及展布均产生了极为重要的影响,且对其油气运聚成藏及分布起到了决定性的控制作用。
Integrative and multidisciplinary analyses of the development and evolvement and the geologic functions of Pearl River Mouth Basin reveal that it is filled with two types of source rocks that are Eocene Wenchang Formation middle-deep lacustrine facies and Lower Oligoeene fluviolacustrine paludal facies. It had Upper Oligocene Zhuhai Formation facies and Middle-Upper Miocene sandstone reservoirs and the associated eaprocks at the stage of faulting-depression. A lot of NWW faults caused by intense tectonic and faulting activities not only controlled the tectonic framework of the basin but also supplied tunnels for the deep oil and gas migration and accumulation. It has reservoirs characterized by lower oil generation and upper oil accumulation as well as continent oil generation and marine accumulation.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2009年第3期384-391,共8页
Natural Gas Geoscience
基金
国家重点基础研究发展计划项目(编号:2007CB41170501)
中国科学院知识创新工程重要方向项目(编号:KZCX2-YW-203-2)联合资助
关键词
珠江口盆地
发育演化阶段
油气成藏条件
新构造运动
油气储盖组合
Pearl River Mouth Basin
Development stages
Conditions of petroleum accumulation
Neotec-tonic movement
Reservoir-seal association.
