岩性油气藏 ›› 2022, Vol. 34 ›› Issue (1): 34–42.doi: 10.12108/yxyqc.20220104

• 油气地质 • 上一篇    下一篇

差异曲率下的曲流河点坝砂体定量表征——以黄河源区白河现代沉积为例

易志凤1,2, 张尚锋1,2, 王雅宁1,2, 徐恩泽1, 赵韶华1, 王玉瑶1   

  1. 1. 长江大学地球科学学院, 武汉 430000;
    2. 长江大学油气资源与勘探技术教育部重点实验室, 湖北荆州 434023
  • 收稿日期:2021-08-29 修回日期:2021-10-09 发布日期:2022-01-21
  • 通讯作者: 张尚锋（1964—），男，博士，教授，主要从事沉积学与层序地层学方面的教学和科研工作。Email：jpuzhangsf@163.com。 E-mail:jpuzhangsf@163.com
  • 作者简介:易志凤(1996-),女,长江大学在读硕士研究生,研究方向为应用沉积学。地址:(430000)湖北省武汉市蔡甸区长江大学武汉校区地球科学学院。Email:1248422842@qq.com
  • 基金资助:
    国家自然科学基金项目“南海北部宽缓大陆架海平面变化及双坡折带层序地层模型”（编号：41472098）资助

Quantitative characterization of point bar sand bodies in meandering river under different curvatures: A case study of modern deposition of Baihe river in the source area of Yellow River

YI Zhifeng1,2, ZHANG Shangfeng1,2, WANG Yaning1,2, XU Enze1, ZHAO Shaohua1, WANG Yuyao1   

  1. 1. School of Geoscience, Yangtze University, Wuhan 430000, China;
    2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Jingzhou 434000, Hubei, China
  • Received:2021-08-29 Revised:2021-10-09 Published:2022-01-21

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摘要： 正确认识曲流河点坝砂体的形态和规模，对井间砂体连通认识、流体运移路径分析及剩余油高效精准挖潜具有重要意义。以黄河源区现代白河为例，利用ArcGIS软件对白河卫星影像的31个典型点坝砂体进行矢量化，建立点坝砂体规模参数的基础测量数据表，并通过坡降划分选取典型点坝曲流段进行刻画，在曲率划分的基础上探讨了点坝砂体规模与河道宽度的定量关系。结果表明：坡降越大，则河道宽度越小，曲率越小；点坝长度、点坝宽度与河道宽度两两之间呈正相关关系，且在不同曲率下，其相关性有所差异，当曲率k小于2时，点坝长度与河道宽度的相关系数为0.790，点坝宽度与点坝长度的相关系数为0.812，点坝宽度与河道宽度的相关系数为0.414；当k为2～2.5时，点坝长度与河道宽度的相关系数为0.709，点坝宽度与点坝长度的相关系数为0.883，点坝宽度与河道宽度的相关系数为0.841。该研究结果对曲流河储层定量表征具有一定的借鉴意义。

关键词: 曲流河, 点坝, 定量表征, 曲率, ArcGIS, 坡降, 现代沉积

Abstract: A correct understanding of the shape and scale of meandering river point bar sand bodies is of great significance to the understanding of interwell sand body connectivity,fluid migration path analysis and efficient and accurate tapping of remaining oil. Taking the modern Baihe river in the Yellow River source area as an example, ArcGIS software was used to vectorize the 31 typical point bar sand bodies in the Baihe satellite image,and the basic measurement data table of the parameters of point bar sand body scale was established. The typical point bar meandering sections were selected for characterization through slope division,and the quantitative relationship between the scale of the point bar sand bodies and the width of the river channel was discussed on the basis of curvature division. The results show that the larger the slope,the smaller the river width and the smaller the curvature. There is a positive correlation among point bar length,point bar width and river channel width,and the correlation is different under different curvatures. When the curvature k is less than 2,the correlation coefficient between point bar length and river channel width is 0.790,the correlation coefficient between point bar width and point par length is 0.812,and the correlation coefficient between point bar width and river channel width is 0.414. When k is 2.0-2.5,the correlation coefficient between point bar length and river channel width is 0.709,the correlation coefficient between point bar width and point bar length is 0.883,and the correlation coefficient between point bar width and river channel width is 0.841. The research results can be used for reference to the quantitative characterization of meandering river reservoirs.

Key words: meandering river, point bar, quantitative characterization, curvature, ArcGIS, slope, modern deposition

中图分类号: 

  • TE121.2+3
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