HYDROCARBON-FORMING ORGANISMS IN EXCELLENT MARINE SOURCE ROCKS IN SOUTH CHINA
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摘要: 在以往海相优质烃源岩研究的基础上,利用扫描电镜结合能谱元素分析方法对优质页岩进行成分、成烃生物、形成环境和生烃潜力等综合研究,认为海相优质页岩成烃生物主要有3种类型:1)浮游藻类,包括硅质鱼鳞藻、疑源类(硅质光面球藻、原始硅藻及有机小刺藻等)、蓝藻类(钙质色球藻等)及钙质塔斯马尼亚藻等;2)底栖生物,包括硅质(或钡质或铁质等)藻席、硅质藻孢子囊、硅质藻丝体残片、硅质海绵及原始线叶植物(含粘土)等;3)菌类,包括钙质真菌菌丝(含有机质)、硅质细菌(含有机质)、硫细菌(可不含有机质)、铁细菌(含有机质)及纳米钙质细菌等。通过对不同层位成烃生物组合特征结合能谱元素数据,初步分析了优质页岩形成时的水体环境。现代藻类热压模拟实验和含单一成烃生物的实际油页岩样品热解实验研究表明,浮游藻类相当于Ⅰ型干酪根生烃潜力,底栖藻类相当于Ⅱ型干酪根生烃潜力。Abstract: Based on previous studies,excellent marine source rocks in South China were collected and studied by Scanning Electron Microscope and Energy Dispersive Spectrometer.Compositions,hydrocarbon-forming organisms,sedimentary environments and hydrocarbon potential of the excellent marine source rocks were discussed.There are three types of hydrocarbon-forming organisms in the excellent marine source rocks: 1) Pelagic algae,including siliceous Mallomonas,Acritarchs(siliceous Leiosphaeridia,Diatom,Micrhystridium and so on),Cyanophyta(calcareous Chroococcus and so on),and calcareous Tasmanaceae.2) Benthic organisms,including siliceous or baritic or ferruginous algal mats,siliceous sporangium,siliceous filaments relic,siliceous sponge,and original Nematothallus(containing clay).3) Fungi,including calcareous fungi hypha(containing organic matter),calcareous bacteria(containing organic matter),sulfur bacteria(not always containing organic matter),iron bacteria(containing organic matter),calcareous nanobacteria,and so on.Palaeoenvironment was analyzed according the elements and hydrocarbon-forming organisms compositions.Modern algae hydrous pyrolysis in closed system and pyrogenation of oil shales which contain single hydrocarbon-forming organism were carried out.Hydrocarbon potential of pelagic algae was equivalent to type Ⅰ kerogen,and the benthic algae was equivalent to type Ⅱ kerogen.
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[1] 秦建中.中国烃源岩[M].北京:科学出版社,2005:128. [2] 张水昌,张宝民,边立曾,等.中国海相烃源岩发育控制因素[J].地学前缘,2005,12(3):39-48. [3] 中国石油化工集团公司油气勘探开发继续教育无锡基地.石油地质样品分析测试技术及应用[M].北京:石油工业出版社,2006:269. [4] 曹剑.边立曾,胡凯,等.柴达木盆地北缘侏罗系烃源岩中发现底栖宏观红藻类生烃母质[J].中国科学D辑,2009,39(4):474-480. [5] 腾格尔,高长林,胡凯,等.上扬子东南缘下组合优质烃源岩发育及生烃潜力[J].石油实验地质,2006,28(4):359-365. [6] 腾格尔,秦建中,郑伦举.黔南坳陷海相优质烃源岩的生烃潜力及时空分布[J].地质学报,2008,82(3):366-372. [7] 秦建中,腾格尔,付小东.海相优质烃源层评价与形成条件研究[J].石油实验地质,2009,31(4):366-372. [8] 秦建中,付小东,腾格尔.川东北宣汉-达县地区三叠-志留系海相优质烃源层评价[J].石油实验地质,2008,30(4):368-374. [9] 秦建中,付小东,刘效曾.四川盆地东北部气田海相碳酸盐岩储层固体沥青研究[J].地质学报,2007,81(8):1065-1070. [10] 付小东,秦建中,腾格尔.四川盆地东南部海相层系优质烃源层评价:以丁山1井为例[J].石油实验地质,2008,30(6):621-628. [11] 刘宝泉,蔡冰,方杰.上元古界下马岭组页岩干酪根的油气生成模拟实验[J].石油实验地质,1990,12(2):147-160. [12] 秦建中,刘井旺,刘宝泉,等.加温时间、加水量对模拟实验油气产率及地化参数的影响[J].石油实验地质,2002,24(2):152-157. [13] 张文涛,腾格尔,秦建中,等.贵州遵义松林下寒武统烃源岩中一种可疑的管状化石研究[J].石油实验地质,2010,32(2):171-174. [14] 秦建中,付小东,申宝剑,等.四川盆地上二叠统海相优质页岩超显微有机岩石学特征研究[J].石油实验地质,2010,32(2):164-170. [15] 陈夏法.海雪奇观[J].科学启蒙,2001(1):30. [16] SALLY M,ALICE A,CHRIS G.Accumulation of marine snow at density discontinuities in the water column[J].Limnology and Oceanography,1995,40(3):449-468. [17] THOMAS K,GEORGE J.Marine snow,organic solute plumes,and optimal chemosensory behavior of bacteria[J].Limnology and Oceanography,2001,46(6):1309-1318. [18] 孙永革,肖中尧,徐世平,等.塔里木盆地原油中芳基类异戊二烯烃的检出及其地质意义[J].新疆石油地质,2004,25(2):215-218. [19] 贾望鲁,彭平安,肖中尧.塔里木盆地典型海相原油沥青质中1,2,3,4-四甲基苯的碳同位素组成:母源形成于强还原环境的证据[J].中国科学D辑,2008,38(1):94-98. [20] 秦建中,李志明,刘宝泉,等.海相优质烃源岩形成重质油与固体沥青潜力分析[J].石油实验地质,2007,29(3):280-285. -
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