石油勘探与开发 >

2019 , Vol. 46 >Issue 2: 322 - 333

DOI: https://doi.org/10.11698/PED.2019.02.12

油气勘探

浅水三角洲前缘指状砂坝构型特征——以渤海湾盆地渤海BZ25油田新近系明化镇组下段为例

  • 徐振华 ,
  • 吴胜和 ,
  • 刘钊 ,
  • 赵军寿 ,
  • 耿红柳 ,
  • 吴峻川 ,
  • 张天佑 ,
  • 刘照玮
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  • 1.中国石油大学（北京）,北京 102249;
    2.中海石油（中国）有限公司天津分公司渤海石油研究院,天津 300459
徐振华（1992-),男,天津人,现为中国石油大学（北京）在读博士研究生,从事油气田开发地质及储集层表征与建模的研究。地址: 北京市昌平区府学路18号,中国石油大学（北京）地球科学学院,邮政编码：102249。E-mail: 442665702@qq.com。

收稿日期: 2018-07-05

  网络出版日期: 2019-01-24

基金资助

国家自然科学基金面上项目“湖盆浅水缓坡三角洲指状砂坝的构型特征及形成机理研究”（41772101）; 国家科技重大专项“低渗-致密砂岩储层体系表征及评价新方法”（2017ZX05009001-002）

收起

Sandbody architecture of the bar finger within shoal water delta front: Insights from the Lower Member of Minghuazhen Formation, Neogene, Bohai BZ25 Oilfield, Bohai Bay Basin, East China

  • XU Zhenhua ,
  • WU Shenghe ,
  • LIU Zhao ,
  • ZHAO Junshou ,
  • GENG Hongliu ,
  • WU Junchuan ,
  • ZHANG Tianyou ,
  • LIU Zhaowei
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  • 1.China University of Petroleum, Beijing 102249, China;
    2.Bohai Petroleum Research Institute, CNOOC Tianjin Branch, Tianjin 300459, China

Received date: 2018-07-05

  Online published: 2019-01-24

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摘要

综合应用岩心、测井和地震资料,对渤海BZ25油田新近系明化镇组下段砂体进行了构型解剖,探讨浅水三角洲前缘指状砂坝内部的沉积微相组成,分析指状砂坝的宏观分布及内部构型特征。浅水三角洲前缘指状分支砂体为指状砂坝沉积,由河口坝、坝上分流河道以及天然堤组成,分流河道下切河口坝,薄层天然堤则披覆于分流河道两侧的河口坝之上。指状砂坝平面上多呈弯曲状,向盆地方向弯曲度有所增加,内部分流河道由深切河口坝型到浅切河口坝顶部型转变。研究区指状砂坝宽厚比为25~110,宽度与厚度呈一定双对数线性正相关关系,并受控于基准面旋回变化。针对指状砂坝,在注水开发方式下,应避免同一分流河道内注采的开发方式,并指出指状砂坝内分流河道的中上部及注采井未钻遇的河口坝砂体为剩余油挖潜的重点。图11表1参37

关键词： 浅水三角洲; 指状砂坝; 砂体构型; 渤海BZ25油田; 新近系明化镇组; 剩余油

本文引用格式

徐振华 , 吴胜和 , 刘钊 , 赵军寿 , 耿红柳 , 吴峻川 , 张天佑 , 刘照玮 . 浅水三角洲前缘指状砂坝构型特征——以渤海湾盆地渤海BZ25油田新近系明化镇组下段为例[J]. 石油勘探与开发, 2019 , 46(2) : 322 -333 . DOI: 10.11698/PED.2019.02.12

Abstract

Core, well logging and seismic data were used to investigate sandbody architectural characteristics within Lower Member of Minghuazhen Formation in Neogene, Bohai BZ25 Oilfield, and to analyze the sedimentary microfacies, distribution and internal architecture characteristics of the bar finger within shoal water delta front. The branched sand body within shoal water delta front is the bar finger, consisting of the mouth bar, distributary channel over bar, and levee. The distributary channel cuts through the mouth bar, and the thin levee covers the mouth bar which is located at both sides of distributary channel. The bar finger is commonly sinuous and its sinuosity increases basinward. The distributary channel changes from deeply incising the mouth bar to shallowly incising top of the mouth bar. The aspect ratio ranges from 25 to 50 and there is a double logarithmic linear positive relationship between the width and thickness for the bar finger, which is controlled by base-level changing in study area. For the bar finger, injection and production in the same distributary channel should be avoided during water flooding development. In addition, middle-upper distributary channel and undrilled mouth bar are focus of tapping remaining oil.

Key words： shoal water delta; bar finger; sandbody architecture; Bohai BZ25 Oilfield; Neogene Minghuazhen Formation; remaining oil

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