西南石油大学学报(自然科学版)

• 地质勘探 •    下一篇

乌伦古拗陷石炭系烃源岩再认识

张奎华1,2,李艳丽2,张关龙2,白仲才2   

  1. 1. 中国石油大学(华东)地球科学与技术学院,山东青岛266555
    2. 中国石化胜利油田分公司西部新区研究中心,山东东营257000
  • 出版日期:2013-10-20 发布日期:2013-10-20
  • 基金资助:

    国家科技重大专项(2011ZX05002–002, 2011ZX05008–001–51)

The Further Understanding of Carboniferous Source Rocks in
Wulungu Depression

Zhang Kuihua1,2, Li Yanli2, Zhang Guanlong2, Bai Zhongcai2   

  1. 1. College of Geosciences,China University of Petroleum(Hua Dong),Qingdao,Shandong 266555,China
    2. Western New Prospect Research Center,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257000,China
  • Online:2013-10-20 Published:2013-10-20

摘要:

乌伦古拗陷是否发育石炭系烃源岩以及烃源岩发育层位一直存在争议。在乌伦古拗陷伦 6 井北发现了石炭
系姜巴斯套组烃源岩露头,证实了乌伦古拗陷确实发育石炭系烃源岩。该剖面烃源岩以泥岩、粉砂质泥岩为主,为一
套滨浅海相沉积。烃源岩潜力分析结果表明,该套烃源岩有机质丰度高,ITOC 平均为 1.23%;有机质类型好,以 II1 型
为主,利于生油;烃源岩处于高成熟演化阶段。同时,烃源岩的饱和烃、芳烃特征反映该烃源岩形成于还原的微咸水环
境,说明该区滨浅海相的沉积环境有利于烃源岩的发育,能够形成规模的源岩层,具备良好的勘探前景。

关键词: 石炭系, 烃源岩, 生烃潜力, 生物标志化合物, 高成熟

Abstract:

Whether Carboniferous source rock develops and its developing stratigraphic position of the real source rock in
Wulungu Depression are always in dispute. The Jiangbasitao formation source rocks found in the north of Lun 6 well verify
that Carboniferous source rock does exist in this area. The mudstone and the silty mudstone deposited in the shore and shallow
sea are the main source rock types. The source rocks are medium-good with the average organic carbon in 1.23%. The type of
organic matter is mainly II1 type, which contributes to oil generation. The source rocks are in the high-maturity stage. Some
geochemical characteristics including saturated hydrocarbon and aromatic hydrocarbon are that the source rocks are developed
in the reductive and brackish water environment. It indicates that the shore and shallow sea is favorable to source rock, which
facilitates the abundant source rocks forming and possess good prospects for exploration.

Key words: Carboniferous, source rock, hydrocarbon potential, biomarker, high-maturity

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