石油学报 ›› 2002, Vol. 23 ›› Issue (5): 34-39.DOI: 10.7623/syxb200205007

• 地质勘探 • 上一篇    下一篇

烃源岩的非均质性研究——以东营凹陷牛38井为例

朱光有, 金强   

  1. 石油大学地球资源与信息学院, 山东东营, 257061
  • 收稿日期:2001-08-14 修回日期:2002-02-09 出版日期:2002-09-25 发布日期:2010-05-21
  • 作者简介:朱光有,男,1975年9月生,1998年毕业于石油大学(华东),现为石油大学博士研究生,主要从事石油地质和油气地球化学方面综合研究.
  • 基金资助:
    国家"十五"重点科技攻关项目(2001BA605A-09).

Study on source rock heterogeneity-a case of Niu-38 well in Dongying Depression

ZHU Guang-you, JIN Qing   

  1. University of Petroleum, China, Dongying 257061, China
  • Received:2001-08-14 Revised:2002-02-09 Online:2002-09-25 Published:2010-05-21

摘要: 通过对东营凹陷沙河街组烃源岩的研究,发现厚度大、分布广的沙三段主力烃源岩在有机质和岩性等方面存在多种尺度的非均质性.用牛38井资料证实,烃源岩受沉积环境、有机质保存条件、生烃和排烃作用的影响,可以形成岩性和有机质的不均匀分布状况.烃源岩非均质性出现在同一岩层、相带内,也可出现在毫米级的纹层间,甚至出现在分子组成(生物标志物)上.从宏观到微观系统地分析了烃源岩的非均质性,并从古生产力、缺氧程度、沉积速率等方面讨论了它的控制因素,提出优质烃源岩的形成环境为高生产力和缺氧条件的叠合区.

关键词: 烃源岩, 非均质性, 形成环境, 东营凹陷, 牛38井

Abstract: A heavy heterogeneity was discovered in the major source rocks of the third member of the Shahejie formation in Dongying depression,which means uneven distribution of the lithology,sedimentary and organic facies,as well as hydrocarbon generation and expulsion in the source rocks.The heterogeneity in the source rocks appeared in either macro-scale,such as depositional sub-facied,and rock rhyme or micro-scale,such as laminated variation in kerogen maceral and biomarker composition.The heterogeneity was resulted from variety of lithology and organic matter facies in different depositional environment and organic mater preservation.The genetics and control factors for the heterogeneity are discussed.It is suggested that high paleo-productivity and anoxic environment may be the most basic conditions to form excellent source rocks.

Key words: source rock, heterogeneity, paleo-productivity, anoxzic environment, Niu-38 well, Dongying depression

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