黄骅坳陷北大港构造带沙河街组沉积体系定量研究  

Quantitative studies on depositional systems of the Shahejie Formation in Beidagang structural belt,Huanghua Depression

作　　者：吴林钢[1] 朱筱敏[1] 范乐元[1] 钟大康[1] 

机构地区：[1]中国石油大学(北京)资源与信息学院,北京102249

出　　处：《古地理学报》2008年第3期241-250,共10页Journal of Palaeogeography：Chinese Edition

摘　　要：针对陆相湖盆沉积特征,以TACross高分辨率层序地层学理论为指导,在大量岩心、测井和地震资料研究的基础上,定量研究了黄骅坳陷北大港构造带沙河街组沉积体系和沉积物源特征,确定了沙河街组沉积时期总体发育近岸水下扇、滩坝、深水重力流水道、扇三角洲前缘和滑塌浊积扇等主要沉积相类型。中期基准面旋回A-D层序沉积时期发育近岸水下扇和扇三角洲前缘—前扇三角洲—滑塌浊积扇沉积体系;中期基准面旋回E-F层序沉积期间发育有利于油气储集的近岸水下扇和滩坝砂体;中期基准面旋回G层序沉积时期主要发育重力流主水道—重力流水道侧缘以及近岸水下扇沉积砂体;中期基准面旋回H层序沉积时期主要发育重力流主水道—重力流水道侧缘沉积体系。最后,预测了有利岩性圈闭发育的沉积相带和地区。Quantitative studies on depositional systems and material provenances have been made,and the sedimentary facies types including the nearshore subaqueous fan, lake beach bar, deep water gravity Shahejie Formation in the Beidagang structural beh in the Huanghua Depression, based on the analyses of core, well logs and seismic data by the guidance of Cross＇s theory of high resolution sequence stratigraphy. Nearshore subaqueous fan-fan deha-turbidity fan depositional systems were developed during the deposition of the middle term base level cycles A-D. Some nearshore subaqueous fan and lake beach-bar sandbodies which are favorable for petroleum accumulation were developed during the deposition of the middle term base level cycles E-F. Gravity flow channel and nearshore subaqueous fan were developed during the depo sition of the middle term base level cycle G. 0nly gravity flow channel-channel side was developed during the deposition of the middle term base level cycle H. The favorable depositional systems and developing areas for lithologic traps have been predicted.

关 键 词：黄骅坳陷 北大港构造带 沙河街组 沉积体系 定量研究 

分 类 号：P512.2[天文地球—地质学]