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琼东南盆地深水区陵水凹陷古近纪同沉积断裂对层序构成样式的控制
宋广增,王华,孙志鹏,刘小龙,徐蒙,任金锋
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(中国地质大学构造与油气资源教育部重点实验室, 湖北武汉 430074;中国地质大学资源学院, 湖北武汉 430074;中国海洋石油湛江分公司,广东湛江 524000;中国海洋石油研究总院,北京 100010;山东省地质科学实验研究院,山东济南 250013)
摘要:
综合利用地质与地球物理资料,并根据断层组合样式及活动速率分析,对陵水凹陷古近系开展同沉积断裂对层序构成样式的控制性研究。结果表明:陵水凹陷西部、中部及东部识别出非对称地堑型、对称地堑型、半地堑型3种构造地层格架;由于断层活动性变化,陵水凹陷古近系发育上倾坡脚型断坡带、下倾坡脚型断坡带与弯折带3种构造古地貌背景,并分别控制3种沉积充填样式的发育;不同的沉积充填配置在不同的构造地层格架中组成了对储集体展布具有重要预测作用的层序构成样式,为深水区隐蔽油气藏的勘探提供基础。
关键词:  深水区  同沉积断层  层序构成样式  构造地层格架  坡折带
DOI:10.3969/j.issn.1673-5005.2014.04.002
投稿时间:2013-12-16
基金项目:国家自然科学基金项目(41272122);国家“十二五”油气重大专项课题(2011ZX05009-002-02);“构造与油气资源”教育部重点实验室开放课题(TPR-2013-14);中国地质大学(武汉)教学实验室开放基金项目
Paleogene sydepositional fault and its control on sequence architecture of Lingshui sag, deepwater area of Qiongdongnan Basin, South China Sea
SONG Guangzeng,WANG Hua,SUN Zhipeng,LIU Xiaolong,XU Meng,REN Jinfeng
(Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074, China;Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China;Zhanjiang Branch of CNOOC, Zhanjiang 524000, China;Research Institute of China National Offshore Oil Corporation Limited, Beijing 100010, China;Shandong Institute and Laboratory of Geological Sciences, Jinan 250013, China)
Abstract:
Based on geological and geophysical data, the Paleogene syndepositional fault and its control on sequence architecture of Lingshui sag were studied by analyzing the combination features and faulting-activity rate of the fault. The results show that three kinds of frameworks, i.e., asymmetric graben, symmetric graben and half-graben, were developed individually in the east, middle, and west of Lingshui sag. Three kinds of structural paleogeomorphologies, i.e., up-dip foot slope break belt, down-dip foot slope break belt and gentle slope-break belt, were developed in response to the changes of faulting-activity, which influenced the sequence-infill patterns. Different sequence-infill patterns distributing within tectono-stratigraphic frameworks have characteristic sequence architectures, which will favorably contribute to exploration of potential reservoirs and subtle oil pools in deepwater area.
Key words:  deepwater area  syndepositional faults  sequence architecture  tectono-stratigraphic framework  slope break belt
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