Sedimentary Evolution Characteristics and Sedimentary Model of the Third Member of Shahejie Formation in Qishen Area of Qikou Sag
详细信息
- 责任者：Du Min (Key Laboratory of Marine Mineral Resources ; Ministry of Land and Resources ; Guangzhou Marine Geological Survey ; Guangzhou 510760 ; China) ; Su Junqing
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(5
- 关键词：砂体 ; sand bodies ; 沉积体系 ; depositional system ; 黄骅坳陷 ; Huanghua Depression
- 页码：p.139-148
- 图表：12 illus., 18 refs.
- 分类号：1003
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
According to core observation and considering drilling,well logging and seismic data,the sedimentary characteristics of the third member of Shahejie Formation in the Qishen area have been researched.The results show that four types of depositional systems composed of braided river delta,subaqueous fan,fan delta and lacustrine depositional system were developed in the third member of Shahejie Formation.Based on sedimentary lithofacies analysis of each borehole,taking seismic facies and attribute into account,and combined with conglomerate thickness,sand content rate and sand thickness,the sedimentary systems maps were made,in which the temporal and spatial distribution characteristics of each segment in the third member of Shahejie Formation were reconstructed in the Qishen area.The studies indicate that the dominate sources were from Zhouqinzhuang of the south,Shenqingzhuang of the northwest,and Xiaozhan-Gegu of the north.The distribution of sedimentary systems of the third member of Shahejie Formation in the Qishen area follows traditional filling model of fault basin,nevertheless extensive distal subaqueous fan is the representative characteristic in this study area.In the Qishen area,the types of depositional systems and their distribution are controlled by different types of structure-paleogeomorphology,whereas the fault transform zones dominate the redistribution of sand bodies.In the study area,the turbid channel deposits of distal subaqueous fan are the most favorable reservoir facies,followed by the underwater distributary channel and mouth bar deposits of braided river delta front,then the mouth bar and underwater distributary channel deposits of fan delta front are the third advantageous reservoir facies.
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