尼日尔三角洲与南海北部陆坡地貌及沉积样式  

TOPOGRAPHY AND SEDIMENTAL STYLE OF CONTINENTAL SLOP IN NIGER DELTA AND NORTHERN SOUTH CHINA SEA

作　　者：周荣福[1] 张莲美[1] 王英民[2] 李磊[2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]中国石油大学资源与信息学院,北京昌平102249

出　　处：《西南石油大学学报（自然科学版）》2009年第3期69-73,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金(40572067)

摘　　要：利用地震资料对尼日尔三角洲与琼东南盆地陆坡深水区的地貌特征及沉积样式进行了对比。研究发现,缺少大套塑性泥岩层和物源供给相对较弱是琼东南盆地陆坡区未形成大量重力逆冲褶皱的主要原因;两地区构造和沉积特征的差异决定了两者勘探目标不同,尼日尔三角洲陆坡深水区应以构造或构造岩性复合圈闭为主,而琼东南盆地陆坡深水区应以隐蔽性圈闭勘探为主;陆坡沉积层序演化模式以低位体系域和水进—高位体系域为特征,该模式为深水油气勘探寻找储层及储盖评价提供了理论依据。研究成果对深水油气勘探的储层预测及储盖组合评价具有一定的指导意义。The study on topography and sedimental style of continental slop in Niger delta and Qiongdongnan Basin is important to exploration.In this paper,the seismic data are used to analyze topography and sedimental style of deepwater slope in Niger delta and Qiongdongnan Basin.As shown in this paper,the main reasons for the absence of gravity thrust folds on continental slop in Qiongdongnan Basin are there are less plastic shale and relative scarce sources;there are differences in structure style and sedimental pattern between the two areas.The structural traps or structure-subtle traps will become main targets of the deepwater exploration in Niger delta.But,attention should be payed to subtle traps in Qiongdongnan Basin.Model of dichotomy in sequence evolution is built up.The model can be meaningful for hydrocarbon hunting and cap rock evaluate ration in deepwater environment.

关 键 词：被动大陆边缘 陆坡 重力逆冲构造 重力流 层序地层 南海北部 尼日尔三角洲 

分 类 号：TE121[石油与天然气工程—油气勘探]