鄂尔多斯盆地北缘下石盒子组盒1段冲积扇高分辨率层序地层学研究  

Study on High Resolution Sequence Stratigraphy of Alluvial Fan in He-1 Member in Lower Shihezi Formation in the Northern Margin of Ordos Basin

作　　者：高照普 GAO Zhao-pu(Exploration and Development Research Institute,Sinopec North China Oil and Gas Company,Zhengzhou 450006,China)

机构地区：[1]中国石化华北油气分公司勘探开发研究院,河南郑州450006

出　　处：《河北地质大学学报》2023年第1期38-44,共7页Journal of Hebei Geo University

基　　金：中国石化科技部项目(P20065-2)。

摘　　要：利用Inpefa技术对鄂尔多斯盆地北缘下石盒子组盒1段陆相冲积扇GR曲线进行频谱分析,其结果更好地再现了基准面旋回的级次及变化规律,从而为三级层序内部进行多级次基准面旋回的划分提供可靠的依据,由此建立了研究区盒1段高分辨率冲积扇层序地层格架,继而进行垂向沉积序列短期旋回及其叠加样式的识别与划分,并以冲积扇沉积模式及沉积特征为基础,采用高分辨率层序研究方法,结合露头模式、岩芯精细描述及测井资料综合应用,针对研究区高分辨率层序格架下,冲积扇沉积体系的分布模式及展布特征进行研究,并总结出受基准面影响的冲积扇演化过程。The GR curve of alluvial fan in He-1 member of Lower Shihezi Formation in the northern margin of Ordos Basin is analyzed by inpefa technology.The results reflect the level and variation of base level cycle,provide a reliable basis for the division of multi-level base level cycle in the third-order sequence,and establish the high-resolution alluvial fan sequence stratigraphic framework in He-1 member of the study area,the short-term cycles and superposition styles of vertical sedimentary sequences are identified and divided.Based on the sedimentary model and sedimentary characteristics of alluvial fan,the distribution model and characteristics of alluvial fan sedimentary system under the high-resolution sequence framework of the study area are studied by using the high-resolution sequence research method,combined with outcrops,core and logging data,the evolution process of alluvial fan affected by base level is summarized.

关 键 词：冲积扇 频谱分析 高分辨率层序地层学 层序界面 基准面旋回 

分 类 号：TE132[石油与天然气工程—油气勘探]