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松辽盆地北部青山口组烃源岩含油性分析
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  • 英文篇名:Oil potential of Qingshankou Formation source rocks in northern Songliao Basin
  • 作者:曾维主 ; 宋之光 ; 曹新星
  • 英文作者:ZENG Wei-zhu;SONG Zhi-guang;CAO Xin-xing;State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences;University of Chinese Academy of Sciences;
  • 关键词:湖相烃源岩 ; 游离烃含量 ; 含油性评价 ; 白垩系青山口组 ; 松辽盆地
  • 英文关键词:lacustrine source rocks;;free hydrocarbon content;;oil potential assessment;;Cretaceous Qingshankou Formation;;Songliao Basin
  • 中文刊名:DQHX
  • 英文刊名:Geochimica
  • 机构:中国科学院广州地球化学研究所有机地球化学国家重点实验室;中国科学院大学;
  • 出版日期:2018-08-02 11:15
  • 出版单位:地球化学
  • 年:2018
  • 期:v.47
  • 基金:国家自然科学基金创新群体项目(41621062)
  • 语种:中文;
  • 页:DQHX201804003
  • 页数:9
  • CN:04
  • ISSN:44-1398/P
  • 分类号:23-31
摘要
对松辽盆地青山口组烃源岩钻井岩芯样品的岩石热解参数和可溶有机质含量等实测数据开展了研究,结果如下:(1)统计结果表明,烃源岩自由烃S_1含量在0.86~2.9 mg/g之间(平均值为1.6 mg/g),可溶有机质含量在6.6~14 mg/g之间(平均值为9.5 mg/g),显示较高的含油率;(2)相关关系研究表明,自由烃S_1含量和可溶有机质含量两项指标,总体上受有机质丰度、成熟度和排烃作用的影响,随有机碳含量TOC和成熟度的增加,含油率呈现一定的增加趋势,排烃作用使含油率明显下降,但不改变含油率随深度不断增加的总趋势;(3)综合评价结果表明,若以热解参数S_1(0.79 mg/g)作为页岩含油率的下限参数值来评价该区页岩油资源潜力,松辽盆地晚白垩世青二三段底部及青一段都具备一定的页岩油资源潜力。
        Analysis of the pyrolysis parameters and soluble organic matter content of Qingshankou Formation source rocks from the Songliao Basin shows that(1) the source rocks show a high shale oil potential, as the free hydrocarbon content S_1 is in the range of 0.86–2.9 mg/g, with an average of 1.6 mg/g, and the soluble organic matter content is between 6.6 and 14 mg/g, with an average of 9.5 mg/g;(2) the free hydrocarbon content S1 and soluble organic matter content of these source rocks are correlated with the total organic matter content, maturity, and hydrocarbon expulsion. With increasing TOC content and maturity, the oil content displays an overall increasing trend. Although hydrocarbon expulsion resulted in a clear decrease in the oil content of the source rocks, it did not alter the overall increasing trend of the oil content with increasing burial depth;(3) if we take the free hydrocarbon content S_1 as the lowest oil content of the source rocks and an S_1 value of 0.79 mg/g as the threshold of the oil content for appraising shale oil resources in this area, the lower part of members 2 and 3 and the entire section of member 1 of the Qingshankou Formation have potential for shale oil exploitation.
引文
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