大杨树盆地中部甘河地区嫩江组烃源岩生烃潜力分析
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摘要
通过岩石热解、总有机碳、镜质体反射率、饱和烃气相色谱-质谱等测试方法,系统分析大杨树盆地中部甘河地区嫩江组烃源岩有机地球化学、生物标志化合物特征,评价其生烃潜力。结果表明,大杨树盆地中部甘河地区嫩江组暗色泥岩有机质丰度较高,属于中等-好烃源岩,有机质类型主要为Ⅱ型干酪根,处于成熟阶段,是一套好的烃源岩。烃源岩形成于还原性的淡-微咸水的水体沉积环境中,有机质来源为混合来源,且以陆生高等植物来源贡献较大。总体显示大杨树盆地中部甘河地区嫩江组烃源岩具有一定的生烃潜力。
The organic geochemistry and biomarker compound features of hydrocarbon source rocks from Nenjiang Formation in Ganhe region of central Dayangshu Basin are systematically analyzed and the hydrocarbon-generating potential is evaluated by means of rock pyrolysis,total organic carbon,vitrinite reflectance,gas chromatography-mass spectrometry of saturated hydrocarbon,etc. The results show that the dark mudstones from Nenjiang Formation in Ganhe region are with high organic abundance,belonging to medium-good hydrocarbon source rocks,and the kerogen type of organic matter is dominated by Ⅱ-type and is in the mature stage,which is a set of excellent hydrocarbon source rocks. The source rocks formed in the fresh-brackish water sedimentary environment with reduction condition,the organic matter is from mixed sources and mainly from terrestrial higher plants. Overall,it is suggested that the hydrocarbon source rocks from Nenjiang Formation in Ganhe region of central Dayangshu Basin have certain hydrocarbon-generating potential.
The organic geochemistry and biomarker compound features of hydrocarbon source rocks from Nenjiang Formation in Ganhe region of central Dayangshu Basin are systematically analyzed and the hydrocarbon-generating potential is evaluated by means of rock pyrolysis,total organic carbon,vitrinite reflectance,gas chromatography-mass spectrometry of saturated hydrocarbon,etc. The results show that the dark mudstones from Nenjiang Formation in Ganhe region are with high organic abundance,belonging to medium-good hydrocarbon source rocks,and the kerogen type of organic matter is dominated by Ⅱ-type and is in the mature stage,which is a set of excellent hydrocarbon source rocks. The source rocks formed in the fresh-brackish water sedimentary environment with reduction condition,the organic matter is from mixed sources and mainly from terrestrial higher plants. Overall,it is suggested that the hydrocarbon source rocks from Nenjiang Formation in Ganhe region of central Dayangshu Basin have certain hydrocarbon-generating potential.
引文
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[17]唐友军,马忠梅,蒋兴超.内蒙古扎鲁特盆地陶海营子剖面林西组烃源岩生物标志化合物特征及意义[J].地质通报,2013,32(8):1315-1321.TANG You-jun,MA Zhong-mei,JIANG Xing-chao.Characteristics and significance of biomarker compounds of Linxi Formation hydrocarbon source rocks along Taohaiyingzi section in Zhalute Basin,Inner Mongolia[J].Geological Bulletin of China,2013,32(8):1315-1321.
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[2]孙晶,薛林福,孟庆龙,等.松辽盆地西缘断陷盆地特征及油气远景:以大杨树盆地为例[J].世界地质,2009,28(3):326-333.SUN Jing,XUE Lin-fu,MENG Qing-long,et al.Characteristics and hydrocarbon potential of the fault basins in western Songliao Basin:a case study of Dayangshu Basin[J].Global Geology,2009,28(3):326-333.
[3]吴河勇.大杨树盆地成藏条件及含油气系统研究:博士学位论文[D].北京:中国地质大学,2003.WU He-yong.Research of pool-forming condition and petroleum system in Dayangshu Basin:doctor's degree thesis[D].Beijing:China University of Geosciences,2003.
[4]中国石油天然气总公司.SY/T 5735-1995陆相烃源岩地球化学评价方法[S].北京:石油工业出版社,1996.China National Petroleum Company.SY/T 5735-1995Geochemical evaluation method of terrestrial hydrocarbon source rocks[S].Beijing:Petroleum Industry Press,1996.
[5]侯读杰,冯子辉.油气地球化学[M].北京:石油工业出版社,2011:201-242.HOU Du-jie,FENG Zi-hui.Petroleum geochemistry[M].Beijing:Petroleum Industry Press,2011:201-242.
[6]卢双舫,张敏.油气地球化学[M].北京:石油工业出版社,2008:201-212.LU Shuang-fang,ZHANG Min.Petroleum geochemistry[M].Beijing:Petroleum Industry Press,2008:201-212.
[7]邬立言,顾信章,盛志纬.生油岩热解快速定量评价[M].北京:科学出版社,1986:23-47.WU Li-yan,GU Xin-zhang,SHENG Zhi-wei.Rapid and quantitative evaluation on source rock pyrolysis[M].Beijing:Science Press,1986:23-47.
[8]Espitalie J,Marquis F,Barsony I.Geochemical logging[C]//Voorhess K J.Analytical pyrolysis.Boston:Butterworths,1984:53-79.
[9]Espitalie J,Deroo G,Marquis F.Rock-eval pyrolysis and its applications(part 2)[J].Revue Del Institut Francais du Petrole,1985,40(6):755-784.
[10]Li M W,Lin R Z,Liao Y S,et al.Organic geochemistry of oils and condensates in the Kekeya field,southwest depression of the Tarim Basin,China[J].Organic Geochemistry,1999,30(1):15-371.
[11]张晓丽,段毅,何金先,等.鄂尔多斯盆地华庆地区延长组下油层组原油地球化学特征及油源对比[J].天然气地球科学,2011,22(5):866-873.ZHANG Xiao-li,DUAN Yi,HE Jin-xian,et al.Geochemical characteristics of crude oil in lower part of Yanchang Formation and correlation of oil source in Huaqing area of Ordos Basin[J].Natural Gas Geoscience,2011,22(5):866-873.
[12]Ten Haven H L,De Leeum J W,Rullk otter J,et al.Restricted utility of the pristine/phytane ratio as a paleoenvironmental indicator[J].Nature,1987,330(6149):641-643.
[13]梅博文,刘希江.我国原油中异戊间二烯烷烃的分布及其与地质环境的关系[J].石油与天然气地质,1980,1(2):99-115.MEI Bo-wen,LIU Xi-jiang.The distribution of isoprenoid alkanes in China's crude oil and its relation with the geologic environment[J].Oil&Gas Geology,1980,1(2):99-115.
[14]彭兴芳,李周波.生物标志化合物在石油地质中的应用[J].资源环境与工程,2006,20(3):279-283.PENG Xing-fang,LI Zhou-bo.The application of biomarker in the research of petroleum geology[J].Resources Environment&Engineering,2006,20(3):279-283.
[15]任军虎,王万春,康晏.有机地球化学指标的分析[J].矿物岩石地球化学通报,2006,25(3):266-271.REN Jun-hu,WANG Wan-chun,KANG Yan.The analysis of organic geochemistry indexes[J].Bulletin of Mineralogy,Petrology and Geochemistry,2006,25(3):266-271.
[16]白雪峰,张海桥.海拉尔盆地巴彦呼舒凹陷烃源岩评价及油源对比[J].世界地质,2011,30(2):231-237.BAI Xue-feng,ZHANG Hai-qiao.Evaluation on source rocks and the oil-source correlation in Bayanhushu sag of Hailaer Basin[J].Global Geology,2011,30(2):231-237.
[17]唐友军,马忠梅,蒋兴超.内蒙古扎鲁特盆地陶海营子剖面林西组烃源岩生物标志化合物特征及意义[J].地质通报,2013,32(8):1315-1321.TANG You-jun,MA Zhong-mei,JIANG Xing-chao.Characteristics and significance of biomarker compounds of Linxi Formation hydrocarbon source rocks along Taohaiyingzi section in Zhalute Basin,Inner Mongolia[J].Geological Bulletin of China,2013,32(8):1315-1321.
[18]张立平,黄第藩,廖志勤.伽马蜡烷-水体分层的地球化学标志[J].沉积学报,1999,17(1):136-140.ZHANG Li-ping,HUANG Di-fan,LIAO Zhi-qin.Gammacerane-geochemical indicator of water column stratification[J].Acta Sedimentologica Sinica,1999,17(1):136-140.
[19]Huang W Y,Meinschein W G.Sterols as ecological indicators[J].Geochimica et Cosmochimica Acta.1979,43(5):739-745.
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