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现代地质 ›› 2007, Vol. 21 ›› Issue (3): 532-537.

• 石油地质学 • 上一篇    下一篇

鄂尔多斯盆地镇原地区中生界延长组、延安组烃源岩地球化学特征对比分析

韩宗元1,2,苗建宇1,2,布占琦3   

  1. 1西北大学 大陆动力学教育部重点实验室, 陕西 西安710069; 2西北大学 地质学系,陕西 西安710069; 
    3中国石化 胜利油田分公司,山东 东营257000
  • 收稿日期:2007-01-15 修回日期:2007-05-12 出版日期:2007-03-20 发布日期:2007-03-20
  • 作者简介:韩宗元, 男,博士研究生,1979年出生, 油气田地质与开发专业,主要从事油气田地质与开发的研究工作。Email: hanzongyuan@263.net。
  • 基金资助:

    国家重点基础研究发展规划“973”项目(2003CB214606)

The Comparative Study on Organic Geochemical Characters of the Mesozoic Source Rocks in T3y and J2y of Zhenyuan in Ordos Basin

HAN Zong-yuan1,2, MIAO Jian-yu1,2, BU Zhan-qi3   

  1. 1Key Laboratory of Continental Dynamics of Ministry of Education, Northwest University, Xi'an, Shaanxi710069, China; 2Department of Geology,
     Northwest University, Xi'an, Shaanxi710069, China; 3Shengli Oilfield Company, SINOPEC,  Dongying, Shandong257000, China
  • Received:2007-01-15 Revised:2007-05-12 Online:2007-03-20 Published:2007-03-20

摘要:

依据各种钻井样品的实验测试资料,通过Rock-Eval岩石评价、显微镜下观察、有机元素分析、镜质体反射率、生物标志化合物等分析方法,对鄂尔多斯盆地镇原地区中生界三叠系延长组和侏罗系延安组烃源岩地球化学特征进行了综合评价。综合分析表明,研究区延长组和延安组烃源岩有机质丰度较好;液态烃生成能力较强;干酪根类型以腐殖型为主;有机质正处于油气生成成熟阶段。延长组有机质在湖相还原条件下堆积和保存,延安组有机质在浅湖相及沼泽相的弱还原条件下沉积,所以前者烃源岩的有机质丰度、类型以及成熟度都要好于后者。

关键词: 烃源岩, 有机质, 干酪根, 生物标志化合物, 鄂尔多斯

Abstract:

Depending on subsurface samples and test data, the authors use analytic methods of Rock-Eval, microscopic observation, organic elemental analysis, vitrinite reflectance and biomarkers comparatively to analyse the organic geochemical characters of the Mesozoic source rocks in T3y and J2y of Zhenyuan in Ordos Basin. The multidisciplinary analyses indicate that the source rocks of T3y and J2y have high organic content, high generating capability of liquid hydrocarbon. The kerogens of source rocks are mainly humic kerogen. Organic matters are now in the maturation period of hydrocarbon generation and have already come into the generative window. Organic matters of T3y were accumulated and preserved in the reducing environment of lacustrine facies, and organic matters of J2y in weak-reducing environment of shallow lacustrine and paludal facies. So source rocks of T3y are much better than those of J2y.

Key words: source rock, organic matter, kerogen, biomarker, Ordos Basin

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