石油学报 ›› 2014, Vol. 35 ›› Issue (3): 439-449.DOI: 10.7623/syxb201403004

• 地质勘探 • 上一篇    下一篇

辽河西部凹陷南段沙河街组三段震积岩特征及石油地质意义

邵珠福1, 钟建华1,2, 范莉红1, 李勇1, 刘宝3, 李竹强4, 罗可1, 王韶洁1   

  1. 1. 中国石油大学地球科学与技术学院 山东青岛 266580;
    2. 中国科学院广州地球化学研究所 广东广州 510640;
    3. 中国石油辽河油田公司勘探开发研究院盆地研究所 辽宁盘锦 124000;
    4. 中国石油化工股份有限公司胜利油田分公司西部新区研究中心 山东东营 257061
  • 收稿日期:2013-09-25 修回日期:2013-12-22 出版日期:2014-05-25 发布日期:2014-04-11
  • 通讯作者: 邵珠福,男,1984年9月生,2007年获中国石油大学(华东)学士学位,现为中国石油大学(华东)地质学专业博士研究生,主要从事重力流沉积及非常规油气地质研究。Email:kangzhu09@yeah.net
  • 作者简介:邵珠福,男,1984年9月生,2007年获中国石油大学(华东)学士学位,现为中国石油大学(华东)地质学专业博士研究生,主要从事重力流沉积及非常规油气地质研究。Email:kangzhu09@yeah.net
  • 基金资助:

    国家自然科学基金项目(No.41172093)资助。

Characteristics and petroleum geologic significance of seismites in the Member 3 of Shahejie Formation in south section of western sag, Liaohe depression

Shao Zhufu1, Zhong Jianhua1,2, Fan Lihong1, Li Yong1, Liu Bao3, Li Zhuqiang4, Luo Ke1, Wang Shaojie1   

  1. 1. School of Geosciences, China University of Petroleum, Qingdao 266580, China;
    2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
    3. Section of Basin Research, Research Institute of Exploration & Development, PetroChina Liaohe Oilfield Company, Panjin 124000, China;
    4. Western New Prospect Research Center, Sinopec Shengli Oilfield Company, Dongying 257061, China
  • Received:2013-09-25 Revised:2013-12-22 Online:2014-05-25 Published:2014-04-11

摘要:

以区域构造背景为基础,通过对28口井近1 000 m岩心的详细观察,在辽河西部凹陷南段古近系沙河街组三段中识别出典型的震积岩。其代表性沉积构造有:微断层和地裂缝、液化砂(砾)岩脉、震动液化卷曲变形、环状层理、负载构造、震积角砾岩和震浊积岩等,其中液化砂岩脉和震积角砾岩是主要类型;震积岩垂向序列划分为阶梯状断层段、液化砂岩脉层段、液化卷曲变形层段、震裂岩和自碎角砾岩层段、震塌岩和内碎屑副角砾岩层段、震浊积岩层段6个部分。震积岩研究有助于恢复古构造演化史和寻找岩性油气藏及构造-岩性油气藏;微断层、地裂缝和液化砂岩脉有利于改善储层条件,地震流体可促进烃源岩演化和成岩作用,同时震积角砾岩本身也是良好的储层。

关键词: 震积岩, 西部凹陷, 沙河街组三段, 软沉积变形, 石油地质

Abstract:

Based on the analysis of regional tectonic setting, this study identifies typical seismites of the Palaeogene Member 3 of Shahejie Formation in the south section of western sag, Liaohe depression through detailed observation of cores approximately at a depth of from 28 drillholes. In the study area, representative sedimentary structures include micro-faults, ground fissure, liquefied sandstone (conglomerate) dykes, liquefied crinkled deformation caused by vibration, annular bedding, load structure, seismo-breccias, and seismo-turbidites. Of these, liquefied sandstone dykes and seismo-breccias are the major types. The vertical sequence of seismites is classified into six intervals, i.e., step fault interval, liquefied sandstone dyke interval, liquefied crinkled deformation interval, interval of shattered rock and autoclastic breccia, interval of seismic-induced collapsed rock and intraclastic parabreccia, and seismo-turbidite interval. Research of seismites helps the reconstruction of paleostructural evolution and the discovery of lithologic and structure-lithologic hydrocarbon reservoirs. The presence of micro-faults, ground fissure, and liquefied sandstone dykes is conducive to the improvement of reservoir conditions. Seismic fluid facilitates the diagenesis and evolution of hydrocarbon source rocks, while shattered breccia itself provides a good reservoir rock for hydrocarbon accumulation.

Key words: seismite, western sag, Member 3 of Shahejie Formation, soft sedimentary deformation, petroleum geology

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