牛庄洼陷沙三中亚段低位域砂体沉积分布特征  

Depositional and Distributive characteristics of Lowstand Sand Bodies in the Middle Es3 Member of Shahejie Formation of Niuzhuang Subsag

作　　者：丁桔红 

机构地区：[1]中国石油股份胜利油田分公司地质研究院,山东东营257015

出　　处：《华南地质与矿产》2012年第2期184-188,共5页Geology and Mineral Resources of South China

摘　　要：依据录井、测井、岩芯和孢粉化石分析等,认为牛庄洼陷发育于原沙三下亚段上下两套油页岩之中的砂体应属于沙三中亚段低位体系域,为水下冲积扇和深水浊积扇;并阐明了其沉积分布特征,且进一步运用层序地层学原理研究认为研究区低位域砂体沉积相组合-层序及体系域叠置模式为低水位深水浊积扇-湖平上升初期的低水位水下冲积扇-后期的湖侵水道。By analyzing of well drilling,well logging,core and cryptogam fossils data,the sand bodies previously classified to the middle of two sets of oil-bearing shale in the lower Es3 should be classified to low-stand system tract（LST） in the middle Es3,which is deposited in underwater fluvial and deep-water turbidite fan phases.The depositional and distributive characteristics of LST in middle Es3 indicated that the sand deposition-sequence and system tract overlay mode are from low-water-level deep-water turbidite fan to low-water-level alluvial fan in earlier lake-level-rise stage,and to later transgressive waterways.

关 键 词：水下冲积扇 深水浊积扇 沉积特征 分布特征 低位体系域 沙三段中亚段 牛庄洼陷 

分 类 号：P539.2[天文地球—古生物学与地层学]