首页> 中文期刊> 《中国石油大学学报(自然科学版)》 >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

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

         

摘要

Based on geological and geophysical data, the Paleogene syndepositional fault and its control on sequence archi-tecture 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 individu-ally 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-strati-graphic frameworks have characteristic sequence architectures, which will favorably contribute to exploration of potential res-ervoirs and subtle oil pools in deepwater area.%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。

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