石油勘探与开发 >

2019 , Vol. 46 >Issue 4: 789 - 802

DOI: https://doi.org/10.11698/PED.2019.04.19

新能源新领域

济阳坳陷古近系沙河街组湖相页岩油赋存机理

  • 王民 ,
  • 马睿 ,
  • 李进步 ,
  • 卢双舫 ,
  • 李传明 ,
  • 郭志强 ,
  • 李政
展开
  • 1. 中国石油大学（华东）深层油气重点实验室,山东青岛 266580;
    2. 中国石油大学（华东）地球科学与技术学院,山东青岛 266580;
    3. 中国石化胜利油田分公司勘探开发研究院,山东东营 257015
王民（1981-）,男,河北石家庄人,博士,中国石油大学（华东）教授,主要从事非常规油气地质方面研究。地址：山东省青岛市黄岛区长江西路66号,中国石油大学（华东）地球科学与技术学院,邮政编码：266580。 E-mail：wangm@upc.edu.cn

收稿日期: 2018-11-26

  修回日期: 2019-02-28

  网络出版日期: 2019-07-17

基金资助

国家自然科学基金（41672116）; 国家油气重大专项（2017ZX05049004）; 中央高校基本科研业务费专项（17CX05012）

收起

Occurrence mechanism of lacustrine shale oil in the Paleogene Shahejie Formation of Jiyang Depression, Bohai Bay Basin, China

  • WANG Min ,
  • MA Rui ,
  • LI Jinbu ,
  • LU Shuangfang ,
  • LI Chuanming ,
  • GUO Zhiqiang ,
  • LI Zheng
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  • 1. Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China;
    2. School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;
    3. Research Institute of Exploration and Development of Shengli Oilfield Company Ltd., SINOPEC, Dongying 257015, China

Received date: 2018-11-26

  Revised date: 2019-02-28

  Online published: 2019-07-17

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摘要

为研究济阳坳陷古近系沙河街组页岩油赋存机理及其可动性,通过有机地球化学、薄片观察、低温氮吸附、高压压汞、场发射扫描电镜等实验分析,揭示了页岩油赋存机理,包括页岩油赋存的孔隙大小、吸附油/游离油比例、可动性大小及影响因素、赋存模式。常温常压条件下,残留页岩油主要赋存在孔径100 nm以下的孔隙中,游离油赋存的孔径下限为5 nm,可动油赋存的孔径下限约为30 nm;轻质组分、低TOC、高孔隙度是可动油比例高的主要原因。每种类型孔隙均可见页岩油残留,但并非所有的孔隙中都发育页岩油,孔隙的连通性及其表面润湿性决定了页岩油的富集程度与状态。图14参52

关键词： 页岩油; 吸附油; 游离油; 赋存机理; 古近系沙河街组; 济阳坳陷; 渤海湾盆地

本文引用格式

王民 , 马睿 , 李进步 , 卢双舫 , 李传明 , 郭志强 , 李政 . 济阳坳陷古近系沙河街组湖相页岩油赋存机理[J]. 石油勘探与开发, 2019 , 46(4) : 789 -802 . DOI: 10.11698/PED.2019.04.19

Abstract

To determine the occurrence mechanism and mobility of shale oil in the Shahejie Formation in the Jiyang Depression, organic geochemistry analysis, thin-section petrological observation, low-temperature nitrogen adsorption, high-pressure mercury intrusion porosimetry, field emission scanning electron microscopy experiments were conducted on shale samples to reveal its storage mechanism, including pore size, ratio of adsorbed oil to free oil, mobility and its influencing factors, and mode of storage. Residual shale oil is mainly present in pores less than 100 nm in diameter under the atmospheric temperature and pressure. The lower limit of pore size for free oil is 5 nm, and the lower limit of pore size for movable oil occurrence is about 30 nm. The light components, low TOC and high porosity are the main factors contributing to the high proportion of movable oil. Each type of pore can contain residual shale oil, but not all pores have shale oil. Pore connectivity and surface wettability are the determinants of shale oil enrichment degree and enrichment state.

Key words： shale oil; absorbed oil; free oil; occurrence mechanism; Paleogene Shahejie Formation; Jiyang Depression; Bohai Bay Basin

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