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现代地质 ›› 2015, Vol. 29 ›› Issue (6): 1435-1443.

• 石油地质学 • 上一篇    下一篇

新疆三塘湖盆地马朗凹陷条湖组凝灰岩油藏油源分析

马剑,黄志龙,高潇玉,陈常超   

  1. (中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249)
  • 出版日期:2015-12-24 发布日期:2016-02-29
  • 作者简介:马剑,女,博士研究生,1987年出生,石油地质专业,主要从事油气藏形成与分布方面的研究工作。 Email:202majian@163.com。
  • 基金资助:

    国家自然科学基金项目(41472111)。

Oil-source Analysis of Tiaohu Formation Tuff Reservoirs in Malang Sag, Santanghu Basin in Xinjiang

MA Jian, HUANG Zhi-long, GAO Xiao-yu, CHEN Chang-chao   

  1. (State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249,China)
  • Online:2015-12-24 Published:2016-02-29

摘要:

通过系统采集新疆三塘湖盆地马朗凹陷二叠系芦草沟组和条湖组各套烃源岩岩心样品以及条湖组凝灰岩段原油样品,研究各套烃源岩的基本地球化学特征、烃源岩和 原油饱和烃生物标志化合物特征、抽提物/原油以及族组分的稳定碳同位素特征等,探讨了凝灰岩油藏的原油来源。结果表明:芦草沟组二段烃源岩的质量最好;各套泥质烃源岩可溶有机质生物标志化合 物特征具有明显的差异,主要表现在Pr/Ph、 γ蜡烷含量、β-胡萝卜烷含量以及规则甾烷ααα20RC27、ααα20RC28、ααα20RC29相对含量等方面;条湖组凝灰岩油藏中原油具有低Pr/Ph、高γ蜡 烷含量、高β-胡萝卜烷含量以及规则甾烷ααα20RC27、ααα20RC28、ααα20RC29中ααα20RC29最高和ααα20RC27最低(谱图呈上升直线型)、原油及族组分稳定碳同位素较轻的特点;油源对比 显示凝灰岩油藏的原油主要来自芦草沟组二段烃源岩,但也有凝灰岩自身有机质的贡献。

关键词: 生物标志化合物, 稳定碳同位素, 油源对比, 凝灰岩, 条湖组, 马朗凹陷

Abstract:

Geochemical characteristics of source rocks, biomarker characteristics of source rocks and crude oil saturated hydrocarbons, stable carbon isotope characteristics of source rock extracts or crude oil and their family components are researched based on source rock samples of Permian Lucaogou and Tiaohu formations, as well as crude oil samples of tuff in Malang Sag of the Santanghu Basin in Xinjiang. The sources of the crude oil in the tuff are made clear in this paper. It indicates that the second member of Lucaogou Formation has the best quality. There are significant differences among soluble organic matter biomarkers of various sets of source rocks, mainly in Pr/Ph, gammacerane content, β-carotane content and peaks of steranes of ααα20RC27, ααα20RC28 and ααα20RC29. Crude oils of tuff in Tiaohu Formation are characterized by low Pr/Ph, high gammacerane content, high β-carotane content, and dominated by ααα20RC29(upward type of steranes of ααα20RC27,ααα20RC28 and ααα20RC29). Also there is light stable carbon isotope of crude oils and their family components. The oil-source correlation shows that the crude oil of the tuff reservoirs is mainly from source rocks of the second member of Lucaogou Formation, and is also from the reservoirs’ organic matters.

Key words: biomarker, stable carbon isotope, oil-source correlation, tuff, Tiaohu Formation, Malang Sag

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