琼东南盆地古近系渐新统烃源岩地球化学特征及生烃潜力分析

李文浩, 张枝焕, 李友川, 傅宁, 黄俨然, 黎琼, 张慧敏

doi:10.11764/j.issn.1672-1926.2011.04.700

天然气地球科学 >

2011 , Vol. 22 >Issue 4: 700 - 708

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.04.700

天然气地球化学

琼东南盆地古近系渐新统烃源岩地球化学特征及生烃潜力分析

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1.中国石油大学油气资源与探测国家重点实验室，北京 102249；
2.中海油研究总院，北京 100027

李文浩（1985-），男，湖北天门人，在读博士，主要从事油气成因机理与分布预测研究.

收稿日期: 2010-10-24

修回日期: 2011-04-14

网络出版日期: 2011-08-10

基金资助

国家重点发展规划(“973”)项目（编号：2009CB219402）资助.

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Geochemical Characteristics and Hydrocarbon Generation ofPaleogene Oligocene Source Rocks in Qiongdongnan Basin

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1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China;
2.CNOOC Research Institute,Beijing 100027,China

Received date: 2010-10-24

Revised date: 2011-04-14

Online published: 2011-08-10

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摘要

琼东南盆地新生界主要发育3套烃源岩，即始新统湖相油源岩、渐新统气源岩及中新统海相气源岩。勘探研究表明，迄今为止在琼东南盆地发现的油气主要来自渐新统烃源岩。渐新统煤系烃源岩有机碳含量和生烃潜力都达到了好的烃源岩有机质丰度标准，渐新统崖城组和陵水组泥岩有机碳含量较高，具有一定的生烃潜力；崖城组和陵水组烃源岩干酪根显微组分主要为镜质组，富氢组分腐泥组和壳质组含量较低，干酪根类型主要为Ⅱ₂型和Ⅲ型，以生气为主。崖城组煤系烃源岩正构烷烃以高碳数分布为主，Pr/Ph值较高，伽马蜡烷指数低，烃源岩主要发育于氧化环境；崖城组泥岩以氧化环境为特征，藿烷系列化合物中检测到高含量的奥利烷，表明高等植物生源输入明显，煤抽提物中规则甾烷C₂₇、C₂₈、C₂₉呈反“L”型分布，主要以高等植物的陆源输入为主，崖城组和陵水组泥岩规则甾烷C₂₇、C₂₈、C₂₉呈“V”型分布，表明生源除了高等植物，藻类也有一定的贡献，部分陵水组烃源岩样品藻类输入明显增多，生烃条件更加有利。

关键词： 生烃潜力; 显微组分; 生物标志物; 地球化学特征; 琼东南盆地

本文引用格式

李文浩, 张枝焕, 李友川, 傅宁, 黄俨然, 黎琼, 张慧敏 . 琼东南盆地古近系渐新统烃源岩地球化学特征及生烃潜力分析[J]. 天然气地球科学, 2011 , 22(4) : 700 -708 . DOI: 10.11764/j.issn.1672-1926.2011.04.700

Abstract

There are three sets of source rocks in the Qiongdongnan basin,including Eocene lacustrine source rock,Oligocene and Miocene marine gas layers.Since the Eocene unit has not yet been met during the drilling,it can only be considered as potential source rock in Oligocene.The total organic carbon (TOC) and hydrocarbon generation in the Oligocene source rocks in the Qiongdongnan basin reach the assessment standard of good source rock.The mudstone in the Oligocene source rocks of Yacheng and Lingshui Formations have the high TOC,associated with a certain hydrocarbon generation potential.The mudstone in the Oligocene source rocks of Yacheng and Lingshui Formations have a dominant vitrinite component,and minor sapropelic and exinite.Kerogen type of source rock is mainlyⅡ₂ or Ⅲ,and prone to generate gas.The n-alkane series of Yacheng Formation dark mudstone are characterized by high carbon number prominence,high Pr/Ph ratio,and low gammacerane index,showing the source rock had formed in oxygenated conditions.High abundance of oleanane detected in the hopane series of compounds shows the input of high plants.The C₂₇,C₂₈,C₂₉ regular steranes in the coal extract occur as opposite “L” pattern,indicating that the organic matter would be originated from the lacustrine high plants.But in the Yacheng Formation and Lingshui Formation mudstone,the sterane series are distributed as “V” pattern,suggesting there would be some of the algae inputs in addition to high plants.The algae input in some parts of Lingshui Formation source rocks greatly increased,indicating the more favorable conditions for generating hydrocarbon.

Key words： Hydrocarbon generation potential; Maceral; Biomarkers; Geochemical characteristics; Qiongdongnan basin.

参考文献

［1］Lin Renzi,Jiang Jiping.Analysis of the development of steranes and terpenes［J］.Journal of Oil and Gas Technology,1983,(1):20-36.［林壬子,蒋基平.甾萜类生物标志化合物研究动态浅析［J］.石油天然气学报,1983,(1):20-36.］
［2］Chen Weihuang,He Jiaxiong,Xia Bin.Review and proposal upon offshore gas exploration in Yingqiong basin［J］.Natural Gas Geoscience,2005,16(4):412-415.［陈伟煌,何家雄,夏斌.莺—琼盆地天然气勘探回顾与存在的主要问题及进一步勘探的建议［J］.天然气地球科学,2005,16(4):412-415.］ 
［3］Huang Baojia,Xiao Xianming,Dong Weiliang.Source rocks and generation & evolution model of natural gas in Yinggehai basin［J］.Natural Gas Industry,2002,22(1):26-30.［黄保家,肖贤明,董伟良.莺歌海盆地烃源岩特征及天然气生成演化模式［J］.天然气工业,2002,22(1):26-30.］ 
［4］Zhang Gongcheng,Li Zengxue,He Yuping,et al.Coal geochemistry of Qiongdongnan basin［J］.Natural Gas Geoscience,2010,21(5):693-699.［张功成,李增学,何玉平,等.琼东南盆地煤地球化学特征［J］.天然气地球科学,2010,21(5):693-699.］
［5］Tao Weixiang,Zhao Zhigang,He Shibin,et al.Petroleum geological conditions and exploration prospects in deepwater area of northwestern South China Sea［J］.Acta Geoscientica Sinica,2005,26(4):359-364.［陶维祥,赵志刚,何仕斌,等.南海北部深水西区石油地质特征及勘探前景［J］.地球学报,2005,26(4):359-364.］
［6］Wang Zhengfeng,He Jiaxiong.Miocene hydrocarbon’s transferring and collecting condition and reservoir combination analysis in Qiongdongnan basin［J］.Natural Gas Geoscience,2003,14(2):107-115.［王振峰,何家雄.琼东南盆地中新统油气运聚条件及成藏组合分析［J］.天然气地球科学,2003,14(2):107-115.］
［7］Hu Zhongliang.Study on Petroleum Generation Kinetics of Source Rocks and Gas Pool Formation in the Yanan Depression of the Qiongdongnan Basin［D］.Guangzhou:Guangzhou Institute of Geochemistry,Chinese Academy of Science,2005.［胡忠良.琼东南盆地崖南凹陷烃源岩生烃动力学和油气成藏研究［D］.广州:中国科学院地球化学研究所,2005.］
［8］Li Xianqing,Zhong Ningning,Xiong Bo,et al.The application of whole rock analysis technique on source rock and a comparison with the result from kerogen analysis［J］.Petroleum Exploration and Development,1995,22(3):30-35.［李贤庆,钟宁宁,熊波,等.全岩分析在烃源岩研究中的应用及与干酪根分析的比较［J］.石油勘探与开发,1995,22(3):30-35.］
［9］Teichmüller M.Organic petrology of source rocks,history and state of art［J］.Organic Geochemistry,1986,10(1/3):581-599.
［10］Hou Dujie,Wang Tieguan,Huang Guanghui,et al.Distribution patterns of pentacyclic triterpenoid hydrocaborns in source rocks［J］.Journal of Jianghan Petroleum Institute,1994,16（4):39-45.［侯读杰,王铁冠,黄光辉,等.低熟烃源岩中五环三萜类的分布型式［J］.江汉石油学院学报,1994,16（4):39-45.］
［11］Peters K E,Walters C C,Mokkwan J M.The Biomarker Guide: Biomarker and Isotopes in Petroleum and Earth History［M］.England:Cambridge University Press,2005.

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