Application of Aromatics on Genesis of Rearranged Hopanes in Coal-bearing Source Rocks
LI HongLei1,2, ZHANG Min1,2, JIANG Lian1,2, CHENG Xiong1,2
1. Key Laboratory of Exploration Technology for Oil and Gas Research (Yangtze University), Ministry of Education, Wuhan 430100, China;
2. School of Earth Environment and Water Resources, Yangtze University, Wuhan 430100, China
Relatively high abundances of the 17α(H)-diahopanes and early-eluting rearranged hopanes were found in coal-bearing source rocks from upper palaeozoic sediments in northeast Ordos Basin. On the basis of the characteristics of rearranged hopanes and their distributions, combined with the compounds of the other biomarkers, aromatic hydrocarbons were applied to discuss the origin of rearranged hopanes. The distribution patterns of saturated hydrocarbons show that rearranged hopanes are related to terrigenous higher plants, and a weak oxidizing environment contributes to their formation. Source rocks, which contain high-abnoraml high abundances of 17α(H)-diahopanes and early-eluting rearranged hopanes (C30*/C30H > 0.2, C30E/C30H > 0.1), are characterized by relatively high concentrations of bicyclic and tricyclic aromatic hydrocarbons (> 50 %) and relatively low concentrations of tetracyclic and pentacyclic aromatic hydrocarbons (< 35%). In addition, aromatic terpenoids and steroids are absent which shows a origin of terrigenous higher plants in source rocks. The characteristics of methylphenanthrenes (MPI1, MPI2 and F1) illustrate that rearranged hopanes in source rocks deposited in a weak oxidizing condition (Pr/Ph>1) mainly form in a mature stage, and their contents increase with the thermal maturity. However, source rocks deposited in a reductive environment (Pr/Ph<1) contain relatively low contents of rearranged hopanes and also increase with the thermal maturity. The parameters of dibenzothiophene, dibenzofuran and fluorine indicate that a weak oxidizing sedimentary environment is important to the formation of 17α(H)-diahopanes and early-eluting rearranged hopanes. A swamp environment is the most helpful to their formation.
Peters K E, Moldowan J M. The Biomarker Guide: Interpreting Molecular Fossils in Petroleum and Ancient Sediments[M]. New Jersey: Prentice Hall, Englewood Cliffs, 1993.
[2]
王春江,傅家谟,盛国英,等. 18α(H)-新藿烷及17α(H)-重排藿烷类化合物的地球化学属性与应用[J]. 科学通报,2000,45(13):1366-1372.[Wang Chunjiang, Fu Jiamo, Sheng Guoying, et al. Geochemical characteristics and applications of 18α(H)-neohopanes and 17α(H)-diahopanes[J]. Chinese Science Bulletin, 2000, 45(13): 1366-1372.]
[3]
Philp R P, Gilbert T D. Biomarker distributions in Australian oils predominantly derived from terrigenous source material[J]. Organic Geochemistry, 1986, 10(1/2/3): 73-84.
[4]
张水昌,张宝民,边立曾,等. 8亿多年前由红藻堆积而成的下马岭组油页岩[J]. 中国科学(D辑):地球科学,2007,37(5):636-643.[Zhang Shuichang, Zhang Baomin, Bian Lizeng, et al. The oil shale formed by the accumulation of the red algae more than 800 million years ago in Xiamaling Formation[J]. Science China (Series D): Earth Sciences, 2007, 37(5): 636-643.]
[5]
肖中尧,黄光辉,卢玉红,等. 库车坳陷却勒1井原油的重排藿烷系列及其油源对比[J]. 石油勘探与开发,2004,31(2):35-37.[Xiao Zhongyao, Huang Guanghui, Lu Yuhong, et al. Rearranged hopanes in oils from the Quele 1 Well, Tarim Basin, and the significance for oil correlation[J]. Petroleum Exploration and Development, 2004, 31(2): 35-37.]
[6]
Obermajer M, Osadetz K G, Fowler M G, et al. Delineating compositional variabilities among crude oils from Central Montana, USA, using light hydrocarbon and biomarker characteristics[J]. Organic Geochemistry, 2002, 33(12): 1343-1359.
[7]
Smith M, Bend S. Geochemical analysis and familial association of Red River and Winnipeg reservoired oils of the Williston Basin, Canada[J]. Organic Geochemistry, 2004, 35(4): 443-452.
[8]
朱扬明,钟荣春,蔡勋育,等. 川中侏罗系原油重排藿烷类化合物的组成及成因探讨[J]. 地球化学,2007,36(3):253-260.[Zhu Yangming, Zhong Rongchun, Cai Xunyu, et al. Composition and origin approach of rearranged hopanes in Jurassic oils of central Sichuan Basin[J]. Geochimica, 2007, 36(3): 253-260.]
[9]
吕延防,张发强,吴春霞,等. 17α(H)-重排藿烷在塔里木盆地中的指相意义[J]. 石油勘探与开发,2001,28(1):36-38.[Lü Yanfang, Zhang Faqiang, Wu Chunxia, et al. The special sedimentary facies indicated by 17α(H)-diahopane in Tarim Basin[J]. Petroleum Exploration and Development, 2001, 28(1): 36-38.]
[10]
程熊,陈小慧,张敏. 鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨[J]. 沉积学报,2014,32(4):790-796.[Cheng Xiong, Chen Xiaohui, Zhang Min. Origin of 17α(H)-rearranged hopanes in Upper Palaeozoic coal-bearing source rocks in northeast Ordos Basin[J]. Acta Sedimentologica Sinica, 2014, 32(4): 790-796.]
[11]
Li Meijun, Wang Tieguan, Liu Ju, et al. Biomarker 17α(H)-diahopane: A geochemical tool to study the petroleum system of a Tertiary lacustrine basin, Norther South China Sea[J]. Applied Geochemistry, 2009, 24(1): 172-183.
[12]
符俊辉,于芬玲. 贺兰山北段呼鲁斯太石炭纪羊虎沟组的牙形刺[J]. 古生物学报,1998,37(4):489-495.[Fu Junhui, Yu Fenling. Late Carboniferous conodonts from the Yanghugou Formation in Helanshan district, North China[J]. Acta Palaeontologica Sinica, 1998, 37(4): 489-495.]
[13]
张文正,杨华,侯林慧,等. 鄂尔多斯盆地延长组不同烃源岩17α(H)-重排藿烷的分布及其地质意义[J]. 中国科学(D辑):地球科学,2009,39(10):1438-1445.[Zhang Wenzheng, Yang Hua, Hou Linhui, et al. Distribution and geological significance of 17α(H)-diahopanes from different hydrocarbon source rocks of Yanchang Formation in Ordos Basin[J]. Science China(Seri.D): Earth Sciences, 2009, 39(10): 1438-1445.]
[14]
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.[Tuo Jincai. Geochemistry of the tertiary aromatic hydrocarbons in the Qaidam Basin - Relationship between dicyclic and polycyclic aromatic hydrocarbons[J]. Experimental Petroleum Geology, 1996, 18(4): 406-412.]
[15]
朱扬明. 塔里木原油芳烃的地球化学特征[J]. 地球化学,1996,25(1):10-18.[Zhu Yangming. Geochemical characteristics of aromatic hydrocarbon from oil in Tarim Basin[J]. Geochimica, 1996, 25(1): 10-18.]
[16]
朱扬明,张洪波,傅家谟,等. 塔里木不同成因原油芳烃组成和分布特征[J]. 石油学报,1998,19(3):33-37.[Zhu Yangming, Zhang Hongbo, Fu Jiamo, et al. Distribution and composition of aromatic hydrocarbon in various oils from Tarim Basin[J]. Acta Petrolei Sinica, 1998, 19(3): 33-37.]
[17]
Kolaczkowska E, Slougui N E, Watt D S, et al. Thermodynamic stability of various alkylated, dealkylated and rearranged 17α- and 17β-hopane isomers using molecular mechanics calculations[J]. Organic Geochemistry, 1990, 16(4/5/6): 1033-1038.
[18]
Radke M, Welte D H, Wilisch H. Geochemical study on a well in the Western Canada Basin: relation of the aromatic distribution pattern to maturity of organic matter[J]. Geochimica et Cosmochimica Acta, 1982, 46(1): 1-10.
[19]
Radke M, Wilisch H, Leythaeuser D, et al. Aromatic components of coal: relation of distribution pattern to rank[J]. Geochimica et Cosmochimica Acta, 1982, 46(10): 1831-1848.
[20]
Kvalhem O M, Christy A A, Telnaes N, et al. Maturity determination of organic matter in coals using the methylphenanthrene distribution[J]. Geochimica et Cosmochimica Acta, 1987, 51(7): 1883-1888.
[21]
Moldowan J M, Fago F J, Carlson R M K, et al. Rearranged hopanes in sediments and petroleum[J]. Geochimica et Cosmochimica Acta, 1991, 55(11): 3333-3353.
[22]
林壬子,王培荣,戴允键,等. 矿物燃料中多环芳烃的石油地球化学意义[C]//有机地球化学论文集. 北京:地质出版社,1987:129-140.[Lin Renzi, Wang Peirong, Dai Yunjian, et al. Petroleum geochemical significance of PAH in fossil fuel[C]//Proceedings of Organic Geochemistry. Beijing: Geological Publishing House, 1987: 129-140.]
[23]
程克明,王铁冠,钟宁宁,等. 烃源岩地球化学[M]. 北京:科学出版社,1995:50-58.[Cheng Keming, Wang Tieguan, Zhong Ningning, et al. Hydrocarbon Source Rock Geochemistry[M]. Beijing: Science Press, 1995: 50-58.]
