收稿日期: 2012-05-04
修回日期: 2012-07-06
网络出版日期: 2012-08-10
基金资助
国家自然科学基金（编号：41103022）;国家重点基础研究发展计划（“973”）项目（编号：2012CB214705）;中国科学院油气资源研究重点实验室开放基金（编号：KFJJ2010-08）联合资助.
Geochemical Characteristics of the Source Rocks from Wunan Lücaotan area in Qaidam Basin
Received date: 2012-05-04
Revised date: 2012-07-06
Online published: 2012-08-10
依据烃源岩有机质丰度、有机质类型和有机质成熟度分析，发现乌南—绿草滩地区较好—好烃源岩主要分布在下干柴沟组上段和下干柴沟组下段。烃源岩生物标志化合物主要特征为正烷烃系列中—低碳数（15~19）出现偶碳数优势，高碳数（25~29）表现为奇数碳优势。萜类化合物表现出高伽马蜡烷—高三环萜和低伽马蜡烷—低三环萜2种类型，C34、C35升霍烷含量较低，甾烷既有C27优势，也有C29优势。反映烃源岩发育区主要处在深湖相带与滨浅湖相带之间的过渡相带，水生生物与陆源高等植物有机质生源各有一定比例。值得关注的是，在绿参1井不同深度的5个古近系—新近系烃源岩样品，在其芳烃馏分中均检测到三联苯系列化合物，发现三联苯系列中不同取代位置的同分异构体相对含量和烃源岩中有机质的热演化程度表现出很好的正相关性，成为氯仿沥青“A”芳烃馏分中判识烃源岩有机质热演化程度的有意义参数。
张明峰，妥进才，张小军，吴陈君，陈茹，郭力军 . 柴达木盆地乌南—绿草滩地区烃源岩地球化学特征[J]. 天然气地球科学, 2012 , 23(4) : 636 -645 . DOI: 10.11764/j.issn.1672-1926.2012.04.636
According to abundance and type of organic matter and its thermal maturity,we consider that the upper and lower sections of lower Ganchaigou Formation belonged to good and better source rock.The biomarker features of n-alkenes for source rocks show an even-to-odd (15-19) and odd\|to\|even (25-29) predominance.Terpenoids are characterized as high γ-and tricyclic diterpene,low γ-and tricyclic diterpene,low abundance of C34and C35hopanes,and C27>C29 or C29>C27 for steranes.All of geochemical parameters suggest that the organic matter was derived from aquatic organisms and higher plants in the transition zone between deep and shallow lacustrine depositional settings.It should be noted that the occurrence of one terphenyl compounds in the aromatic hydrocarbons from 5 source rocks (Lücan 1 well) sampling at different depth,and the relative abundance of each isomers is positively related to thermal maturity,20S/(20S+20R) ratio of C29 steranes,and RO values.So the relative abundance of each isomer would be a potential parameter for indicating thermal maturity of organic matter.
Key words： Qaidam basin; Wunan-Lücaotan area; Source rock; Biomarkers; Terphenyls
［1］Han Xujun,Shi Rulin.The exploration and research in Wunan oilfield,Qaidam basin［J］.Qinghai Shiyou,2001,19(3):24-31.［韩绪军,石如林.乌南油气田开发和认识［J］.青海石油,2001,19(3):24-31.］
［2］Liu Dewen,Chen Guojun,Lv Chengfu,et al.Detrital reservoir characteristics and its controlling factors in clastic reservoir N12 and N22 of Wunan oilfield,Qaidam basin［J］.Acta Sedmentologica Sinica,2009,27(4):657-666.［刘得文,陈国俊,吕成福,等.柴达木盆地乌南油田N12、N22碎屑岩储层特征及其影响因素分析［J］.沉积学报,2009,27(4):657-666.］
［3］Zhang Mingfeng,Tuo Jincai,Li Zhongpin,et al.Geochemical characteristics of crude oils from Wunan oilfield,Qaidam basin［J］.Natural Gas Geoscience,2011,22(5):840-847.［张明峰,妥进才,李中平,等.柴达木盆地西南缘乌南油田原油地球化学特征［J］.天然气地球科学,2011,22(5):840-847.］
［4］Li Hongbo,Zhang Min,Zhang Chunming,et al.Identification of effective source rocks in the Tertiary evaporate facies in the western Qaidam basin［J］.Journal of Oil and Gas Technology：Journal of Jianghan Petroleum Institute,2006,12(6):41-43.［李洪波,张敏,张春明,等.柴达木盆地西部南区第三系烃源岩评价［J］.石油天然气学报:江汉石油学院学报,2006,12(6):41-43.］
［5］Welte D H,Waples D.Uber die Bevorz-gung geradzahliger n-alkane in sedimentgesteinen［J］.Naturwissenschaften,1973,60:516-517.
［6］Shi Yang,Bao Jianping,Zhu Cuishan,et al.Comparative study on geochemistry between crude oils from Qigequan and Xianshuiquan oilfields in western Qaidam basin［J］.Natural Gas Geoscience,2010,21(1):132-138.［施洋,包建平,朱翠山,等.柴达木盆地西部七个泉与咸水泉油田原油地球化学特征对比研究［J］.天然气地球科学,2010,21(1):132-138.］
［7］Wang Tieguan.Geochemistry Research of Biomarkers［M］.Wuhan:China University of Geosciences Press,1990:55- 65.［王铁冠.生物标志化合物地球化学研究［M］.武汉:中国地质大学出版社,1990:55-65.］
［8］McCaffrey M A,Simoneit B R T,Aquino Neto F R,et al.Functionalized biological precursors of tricyclic terpanes:Information from sulfur-bound biomarkers in a Permian tasmanite［J］.Organic Geochemistry,1994,27(5):481-487.
［9］Liu Yuhua,Wen Zhigang,Song Huanxin,et al.Geochemical characteristics and their significance of crude oils from Chang3 oil layer group of Zhen 28 well field,Yanwu highland［J］.Natural Gas Geoscience,2008,19(5):718-721.［刘玉华,文志刚,宋换新,等.鄂尔多斯盆地演武高地镇28井区长3油层组原油地球化学特征及其意义［J］.天然气地球科学,2008,19(5):718-721.］
[JP]
［10］Hanson A D,Ritts B D,Zinniker D,et al.Upper Oligocene lacustrine source rocks and petroleum systems of the northern Qaidam basin,northwest China［J］.AAPG Bulletin,2001,85(4):601-619.
［11］Hong Zhihua,Li Huixiang,Rullktter J,et al.Geochemical application of sterane and triterpane biological marker compounds in the Linyi basin［J］.Organic Geocehemistry,1986,10(1/3):433-439.
［12］Tuo Jincai.Geochemistry of the Tertiary aromatichydrocarbons in the Qaidam basin:Relationship between dicyclic and polycyclic aromatic hydrocarbons［J］.Experimental Petroleum Geology,1996,18(4):406-412.［妥进才.柴达木盆地第三系芳烃的地球化学——二环芳烃与多环芳烃的关系［J］.石油实验地质,1996,18(4):406-412.］［13］Riolo J,Hussler G,Albrecht P,et al.Distribution of aromatic steroids in geological samples:Their evaluation as geochemical parameters［J］.Organic Geocehemistry,1986,10:981-989.
[JP]
［14］Meng Qianxiang,Zhang Songlin,Cui Mingzhong,et al.Distribution features of aromatics in lacustrine low-mature crude oils from different environments［J］.Acta Sedmentologica Sinica,1998,17(1):112-120.［孟仟祥,张松林,崔明中,等.不同沉积环境湖相低熟原油的芳烃分布特征［J］.沉积学报,1998,17(1):112-120.］
［15］Bartle K D,Martin T G,Williams D F.Chemical nature of a supercritical gas extract of coal at 350℃［J］.Fuel,1975,54:226-235.
［16］Sofanos A C,Butler A C.Catalytic liquefaction of South African coals using the carbon monoxide/water system:Part 2,nature of the oils［J］.Fuel Processing Technology,1989,22:189-204.
［17］Radke M,Willsch H,Leythaeuser D,et al.Aromaticcomponents in coal:Relation of distribution pattern to rank［J］.Geochimica et Cosmochimica Acta,1982,46:1831-1848.
［18］Willsch H,Radke M.Distribution of polycyclic aromatic compounds in coals of high rank［J］.Polycyclic Aromatic Compounds,1995,(7):231-251.
［19］Verevkin S P.Thermochemistry of substituted benzenes：Experimental standard molar enthalpies of formation of o-,m-,and p-terphenyls and 1,3,5-triphenylbenzene［J］.Journal Chemical Thermodynamics,1997,20:1495-1501.
［20］Leszek M,Franciszek C,Bernd R T.Phenylnaphthalenes and polyphenyls in Palaeozoic source rocks of the Holy Cross Mountains,
[JP]Poland［J］.Organic Geochemistry,2001,32:69-85.
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