石油勘探与开发 >

2017 , Vol. 44 >Issue 2: 165 - 176

DOI: https://doi.org/10.11698/PED.2017.02.01

油气勘探

断陷湖盆深水沉积地质特征与斜坡区勘探发现--以渤海湾盆地歧口凹陷板桥-歧北斜坡区沙河街组为例

  • 赵贤正 ,
  • 蒲秀刚 ,
  • 周立宏 ,
  • 时战楠 ,
  • 韩文中 ,
  • 张伟
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  • 1. 中国石油大港油田公司,天津 300280;
    2. 中国石油大学（华东）,山东青岛 266580
赵贤正（1962-）,男,浙江义乌人,博士,中国石油大港油田公司教授级高级工程师,主要从事油气勘探、煤层气勘探开发综合研究与生产管理工作。地址：天津市大港油田公司三号院,大港油田公司机关,邮政编码：300280。E-mail: xzzhao@petrochina.com.cn

收稿日期: 2016-06-08

  修回日期: 2017-02-20

  网络出版日期: 2017-05-22

基金资助

中国石油重大科技专项“大港油区大油气田勘探开发关键技术研究”（2014E-06）

收起

Geologic characteristics of deep water deposits and exploration discoveries in slope zones of fault lake basin: A case study of Paleogene Shahejie Formation in Banqiao-Qibei slope, Qikou sag, Bohai Bay Basin

  • ZHAO Xianzheng ,
  • PU Xiugang ,
  • ZHOU Lihong ,
  • SHI Zhannan ,
  • HAN Wenzhong ,
  • ZHANG Wei
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  • 1. PetroChina Dagang Oilfield Company, Tianjin 300280, China;
    2. China University of Petroleum (East China), Qingdao 266580, China

Received date: 2016-06-08

  Revised date: 2017-02-20

  Online published: 2017-05-22

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摘要

基于地震、测录井、试油、岩心及分析化验资料,以渤海湾盆地歧口凹陷板桥-歧北斜坡区古近系沙河街组一段下亚段滨Ⅰ油层组为对象,开展层序划分、深水沉积相特征及模式分析,研究深水重力流规模性发育原因、储集层物性特征及主控因素,提出深水区有利储集相带的划分标准和预测方法。研究表明沙一下亚段滨Ⅰ油层组自下而上可划分为3个厚度在百米之内的五级层序;斜坡深水区沉积了一套远岸水下扇型重力流沉积,发育主水道、分支水道、水道侧缘、水道间泥及无水道区浊积席状砂等微相类型,空间上具有区域性多期多级的继承性和建设性发育特征,为扇三角洲-远岸水下扇-深湖相沉积序列,每一次重力流事件形成的远岸水下扇都可以划分为内扇、中扇和外扇3个亚相类型。以含砂率较高的扇三角洲前缘主砂体作为供给物源的“跨相搬运”砂体可形成优质储集层,孔隙度平均为15.1%、渗透率几何平均值为5.1×10-3 μm2。明确了远岸水下扇主水道及分支水道分布区是最有利的勘探区域。图11表2参43

关键词： 深水沉积; 斜坡区; 砂质碎屑流; 水下扇; 岩性油气藏; 沙河街组; 断陷湖盆; 歧口凹陷; 渤海湾盆地

本文引用格式

赵贤正 , 蒲秀刚 , 周立宏 , 时战楠 , 韩文中 , 张伟 . 断陷湖盆深水沉积地质特征与斜坡区勘探发现--以渤海湾盆地歧口凹陷板桥-歧北斜坡区沙河街组为例[J]. 石油勘探与开发, 2017 , 44(2) : 165 -176 . DOI: 10.11698/PED.2017.02.01

Abstract

Based on seismic, logging, formation testing, core and lab test data, this study analyzed the sequence division, facies features of deep water deposits and modes, development of large-scale gravity flow, reservoir physical properties and their main controlling factors, and proposed a classification standard and prediction method of favorable exploration areas in deep water area of the Bin1 oil layers of the lower sub-member of the first member of Paleogene Shahejie Formation in Banqiao-Qibei slope zone of Qikou sag, Bohai Bay Basin. The Bin1 oil layers can be divided into three fifth-order sequences, each less than 100 m thick; a set of gravity flow deposits were formed under deep water background in the slope zone, which contains sedimentary micro-facies such as main channel, distributary channel, channel margin, inter-channel mudstone, and turbidite sand sheet in areas without channels, and, in space, has inherited and constructive development features of multistages. It is a sedimentary sequence of fan delta - distal subaqueous fan - deep lake, and every distal subaqueous fan formed by gravity flow can be divided into inner-, middle- and outer fans. The cross-facies transported sands which are sourced from higher-sand-content major sands of delta front can form high quality reservoirs with an average porosity of 15.1% and geometric average permeability of 5.1×10-3 μm2. The main channel and distributary channel of distal subaqueous fan are the most favorable exploration zones.

Key words： deep water deposit; slope zone; sandy debris flow; subaqueous fan; lithologic reservoir; Shahejie Formation; fault lake basin; Qikou sag; Bohai Bay Basin

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