Wang Guangli, Wang Tieguan, Han Keyou, Wang Lansheng, Shi Shengbao. Organic geochemical characteristics and origin of solid bitumen and oil sands in northwestern Sichuan[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(6): 731-735. doi: 10.11781/sysydz201406731
Citation: Wang Guangli, Wang Tieguan, Han Keyou, Wang Lansheng, Shi Shengbao. Organic geochemical characteristics and origin of solid bitumen and oil sands in northwestern Sichuan[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(6): 731-735. doi: 10.11781/sysydz201406731

Organic geochemical characteristics and origin of solid bitumen and oil sands in northwestern Sichuan

doi: 10.11781/sysydz201406731
  • Received Date: 2013-12-06
  • Rev Recd Date: 2014-08-25
  • Publish Date: 2014-11-28
  • Hydrocarbon compositions extracted from a set of solid bitumen and oil sands collected in the northern Longmenshan Mountain, the northwestern Sichuan, South China, are unique and consistent. It is suggested that the bulk δ13C values (<-32‰) for the extracts and each fraction show overall depleted values, which is typical of pre-Cambrian source. The high concentrations of C29 steranes relative to C27 and C28 steranes can be explained by the contribution of cyanobacteria, and the distribution of triaromatic steranes has similar characteristics. 24-n-propylcholestane and 24-isopropylcholestane are abundant, which should be derived from marine chrysophyte algae and demosponges. The high abundance of pregnane and homopregnane could be associated with such specific depositional environment as anoxic to euxinic bottom waters. The absence of rearranged steranes, abundant 30-norhopane, C35 and C24 hopane tetracyclic terpanes, and a wealth of dibenzothiophene compounds, reflect the hypoxic environment and higher carbonate rock content. The features of solid bitumen and oil sands in the northwestern Sichuan indicate that they originated from the Doushantuo Formation of Sinian, and can be compared with foreign crude oils which generated during the same period. The presence of UCM and 25-norhopane proved biological degradation during the preservation and destruction processes of ancient reservoir. The hydrocarbons were generated by sulfur-rich kerogens at the early oil windows with Rc values in the range of 0.57%-0.84%. Tectonic uplift and the following erosion and biodegradation might explain the destruction of ancient reservoir.

     

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  • [1]
    罗啸泉,李书兵,赵锡奎.川西龙门山构造特征与油气关系[J].石油实验地质,2011,33(4):384-387. Luo Xiaoquan,Li Shubin,Zhao Xikui. Tectonic features and relationship with petroleum in Longmen Mountain,western Sichuan Basin[J].Petroleum Geology & Experiment,2011,33(4):384-387.
    [2]
    周康,王强,乔永亮.龙门山造山带与川西前陆盆地的盆山耦合关系对油气成藏的控制作用[J].地球科学与环境学报,2011,33(4):378-383. Zhou Kang,Wang Qiang,Qiao Yongliang.Control of the basin-range coupling relationship between Longmen Mountain Oroge-nic Belt and Western Sichuan Foreland Basin to hydrocarbon accumulation[J].Journal of Earth Sciences and Environment,2011,33(4):378-383.
    [3]
    王兰生,韩克猷,谢邦华,等.龙门山推覆构造带北段油气田形成条件探讨[J].天然气工业,2005,25(增刊A):1-5. Wang Lansheng,Han Keyou,Xie Banghua,et al.Reservoiring conditions of the oil and gas fields in the north section of Longmen Mountain nappe structural belts[J].Natural Gas Industry,2005,25(SA):1-5.
    [4]
    黄第藩,王兰生.川西北矿山梁地区沥青脉地球化学特征及其意义[J].石油学报,2008,29(1):23-28. Huang Difan,Wang Lansheng.Geochemical characteristics of bituminous dike in Kuangshanliang area of the Northwestern Sichuan Basin and its significance[J].Acta Petrolei Sinica,2008,29(1):23-28.
    [5]
    黄东,刘全洲,杨跃明,等.川西北部地区下二叠统茅口组油苗地球化学特征及油源研究[J].石油实验地质,2011,33(6):617-623. Huang Dong,Liu Quanzhou,Yang Yueming,et al.Geochemical characteristics of oil seepage and studies of oil source in Maokou Formation,Lower Permian,northwestern Sichuan[J].Petroleum Geology & Experiment,2011,33(6):617-623.
    [6]
    戴鸿鸣,刘文龙,杨跃明,等.龙门山北段山前带侏罗系油砂岩成因研究[J].石油实验地质,2007,29(6):604-608. Dai Hongming,Liu Wenlong,Yang Yueming,et al.The origin of Jurassic oil sandstone in the piedmont zone of north Longmenshan,the Sichuan Basin[J].Petroleum Geology & Experiment,2007,29(6):604-608.
    [7]
    Andrusevich V E,Engel M H,Zumberge J E,et al.Secular,episodic changes in stable carbon isotope composition of crude oils[J].Chemical Geology,1998,152(1-2):59-72.
    [8]
    Stahl W J.Carbon and nitrogen isotopes in hydrocarbon research and exploration[J].Chemical Geology,1977,20:121-149.
    [9]
    Peters K E,Moldowan J M.Effects of source,thermal maturity,and biodegradation on the distribution and isomerization of homohopanes in petroleum[J].Organic Geochemistry,1991,17(1):47-61.
    [10]
    Blanc P,Connan J.Origin and occurrence of 25-norhopanes:A statistical study[J].Organic Geochemistry,1992,18(6):813-828.
    [11]
    Granth P J.The occurence of unusual C27 and C29 sterane predominances in two types of Oman crude oil[J].Organic Geochemistry,1986,9(1):1-10.
    [12]
    Volkman J K.A review of sterol markers for marine and terrigenous organic matter[J].Organic Geochemistry,1986,9(2):83-99.
    [13]
    孟凡巍,周传明,袁训来,等.通过C27/C29甾烷和有机碳同位素来判断早古生代和前寒武纪的烃源岩的生物来源[J].微体古生物学报,2006,23(1):51-56. Meng Fanwei,Zhou Chuanming,Yuan Xunlai,et al.Biological origin of early Palaeozoic and pre-Cambrian hydrocarbon source rocks based on C27/C29 sterane ratio and organic carbon isotope[J].Acta Micropalaeontologica Sinica,2006,23(1):51-56.
    [14]
    Li M W,Jiang C Q.Bakken/Madison petroleum systems in the Canadian Williston Basin.Part 1:C21-C26 20-n-alkylpregnanes and their triaromatic analogs as indicators for Upper Devonian-Mississippian epicontinental black shale derived oils[J].Organic Geochemistry,2001,32(5):667-675.
    [15]
    Moldowan J M,Dahl J,Jacobson S R,et al.Chemostratigraphic reconstruction of biofacies:Molecular evidence linking cyst-forming dinoflagellates with pre-Triassic ancestors[J].Geology,1996,24(2):159-162.
    [16]
    McCaffrey M A,Moldowan J M,Lipton P A,et al.Paleoenvironmental implications of novel C30 steranes in pre-Cambrian to Cenozoic Age petroleum and bitumen[J].Geochimica et Cosmochimica Acta,1994,58(1):529-532.
    [17]
    Moldowan J M,Fago F J,Lee C Y,et al.Sedimentary 24-n-propylcholestanes,molecular fossils diagnostic of marine algae[J].Science,1990,247(4940):309-312.
    [18]
    Hughes W B,Holba A G,Dzou L I P.The ratios of dibenzothiophene to phenanthrene and pristane to phytane as indicators of depositional environment and lithology of petroleum source rocks[J].Geochimica et Cosmochimica Acta,1995,59(17):3581-3598.
    [19]
    钟宁宁,张枝焕.石油地球化学进展[M].北京:石油工业出版社,1998. Zhong Ningning,Zhang Zhihuan.Advancing in petroleum geochemistry[M].Beijing:Petroleum Industry Press,1998.
    [20]
    Fowler M G,Douglas A G.Saturated hydrocarbon biomarkers in oils of Late pre-Cambrian age from eastern Siberia[J].Organic Geochemistry,1987,11(3):201-213.
    [21]
    Grosjean E,Love G D,Stalvies C,et al.Origin of petroleum in the Neoproterozoic-Cambrian South Oman Salt Basin[J].Organic Geochemistry,2009,40(1):87-110.
    [22]
    Peters K E,Clark M E,Gupta U,et al.Recognition of an infracambrian source rock based on biomarkers in the Baghewala-1 oil,India[J].American Association of Petroleum Geologists Bulletin,1995,79(10):1481-1494.
    [23]
    吴群,彭金宁.川东北地区埋藏史及热史分析:以普光2井为例[J].石油实验地质,2013,35(2):133-138. Wu Qun,Peng Jinning.Burial and thermal histories of northeastern Sichuan Basin:A case study of well Puguang 2[J].Petroleum Geology & Experiment,2013,35(2):133-138.
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