岩性油气藏 ›› 2025, Vol. 37 ›› Issue (4): 1–16.doi: 10.12108/yxyqc.20250401

• 地质勘探 • 上一篇    

东营凹陷林东地区中新统馆陶组网状河沉积特征及储层构型

尹艳树1, 李建琴1, 吴伟2, 王立鑫1, 谭先锋3   

  1. 1. 长江大学 油气资源与勘探技术教育部重点研究室, 武汉 430100;
    2. 中国石化胜利油田 东胜精攻石油开发集团股份有限公司;
    3. 重庆科技大学 科学技术处, 重庆 401331
  • 收稿日期:2025-04-04 修回日期:2025-05-06 发布日期:2025-07-05
  • 第一作者:尹艳树（1978-），男，博士，教授，主要从事储层构型与三维建模方面的教学与科研工作。地址：（430100）湖北省武汉市蔡甸区大学路111号。Email：yys@yangtzeu.edu.cn。
  • 通信作者: 李建琴（1998-），女，长江大学在读硕士研究生，研究方向为储层精细结构表征。Email：1779115885@qq.com。
  • 基金资助:
    国家自然科学基金项目“利用任意二维沉积相剖面重构三维地质模型新方法”（编号：42372137）资助。

Sedimentary characteristics and reservoir architecture of anastomosing river in Miocene Guantao Formation，Lindong area，Dongying Sag

YIN Yanshu1, LI Jianqin1, WU Wei2, WANG Lixin1, TAN Xianfeng3   

  1. 1. Key Research Laboratory of Oil and Gas Resources and Exploration Technology, Ministry of Education, Yangtze University, Wuhan 430100, China;
    2. Sinopec Shengli Oilfield Dongsheng Jinggong Petroleum Development Group Co., Ltd., Dongying 257000, Shandong, China;
    3. Chongqing University of Science & Technology, Shabaping District, Chongqing 401331, China
  • Received:2025-04-04 Revised:2025-05-06 Published:2025-07-05

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摘要： 基于现代沉积卫星图像类比，结合岩心、测井及开发动态等资料，对东营凹陷林东地区中新统馆陶组四段网状河的微相类型及其分布特征进行了分析，并对储层砂体进行了刻画，建立了多元分类模型。研究结果表明：①林东地区网状河可划分为河道、天然堤、决口扇、河道间4种微相，河道砂体在平面上呈网状，单一段内河道弯曲度较小，交汇而成的网状河道为中高弯度，剖面上砂体呈顶平底凸的透镜状，局部叠置形成厚度大于10 m的“砂墙”；天然堤砂体分布于河道两侧，宽度为18～430 m，在剖面上呈楔形，厚度一般小于3 m；决口扇少量发育，平面上呈扇状展布，剖面上为楔形薄层（厚3～5 m）；河道间大面积发育，占研究区面积的43%～70%。②研究区馆陶组网状河与现代嫩江网状河在沉积环境、沉积微相特征、水动力与地貌演化方面均有相似性；其河道砂体长轴为北西—南东走向，平面连片分布且连续性较好。③研究区单一河道规模较小，宽度为65～170 m，厚度一般小于5 m，主要发育河道-河道、河道-天然堤2类构型拼接样式。④注水后生产效果及示踪剂动态分析结果显示，研究区注采井发育单一河道砂体且沿NW—SE物源方向展布，水驱优势方向、示踪剂优势运移方向均与古河道延伸走向一致，河道间泥岩或天然堤低渗带形成渗流屏障。

关键词: 网状河, 储层构型, 砂体连片叠置, 透镜状砂体, 馆陶组, 中新统, 林东地区, 东营凹陷

Abstract: Based on analogies from modern sedimentary satellite imagery，integrated with core，well-logging， and production dynamic data，the microfacies types and distribution characteristics of anastomosing rivers from Member 4 of Miocene Guantao Formation in Lindong area of Dongying Sag were analyzed. The reservoir sandbody was characterized，and a multivariate classification model was established. The results show that： （1）The anastomosing rivers in Lindong area can be divided into four microfacies： channel，natural levee，crevasse splay，and interchannel. In plan view， channel sandbodies exhibit an anastomosing network with low-sinuosity single channel segments， while confluences form moderate-to-high-sinuosity interconnected channels. In crosssection，sandbodies exhibit flat-topped and convex-based lenticular geometries，locally superimpose to form “sand walls”，exceeding 10 m in thickness. Natural levee sandbodies distribute on both sides of the river channels， with width of 18-430 m；in cross-section，display as wedge-shaped， with thickness less than 3 m. Crevasse splays develop sparsely，showing fan-shaped geometry in plan view，and in cross-section they form wedgeshaped thin layers， with thickness of 3-5 m. Interchannels extensively develop，accounting for 43%-70% of the study area.（2）Guantao Formation anastomosing rivers share similarities with the modern Nenjiang anastomosing river in terms of sedimentary environment，microfacies，hydrodynamics，and geomorphic evolution. Its channel sandbodies exhibit NW-SE direction of long-axis and display contiguous distribution with favorable continuity in plan view.（3）Single channels in the study area are small-scale，with width of 65-170 m and thickness less than 5 m，developing two types of architectural splicing patterns： channel-channel connectivity and channel-natural levee contact.（4）Production performance post-waterflooding and tracer dynamic analyses show that singlechannel sandbodies are developed in injection-production well along the NW-SE provenance direction，preferential waterflooding/tracer migration paths aligned with paleochannel orientation. Interchannel mudstones and lowpermeability natural levees act as flow barriers.

Key words: anastomosing river, reservoir architecture, laterally contiguous and vertically stacked sandbody, lenticular sandbody, Guantao Formation, Miocene, Lindong area, Dongying Sag

中图分类号: 

  • TE122.2+3
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