鄂尔多斯盆地南缘奥陶系露头沥青地球化学特征与意义

金晓辉; 孙润轩; 陈霞; 孙宜朴; 张军涛; 李淑筠

doi:10.11781/sysydz201605647

鄂尔多斯盆地南缘奥陶系露头沥青地球化学特征与意义

doi: 10.11781/sysydz201605647

1.
中国石化石油勘探开发研究院, 北京 100083
2. 中国石油大学地球科学学院, 北京 102249

基金项目: 国家科技重大专项（2011ZX05005）和中国石化科技部项目（2014P1067）资助。

详细信息

作者简介:
金晓辉(1964-),男,博士,教授级高级工程师,从事油气地质与区带评价研究.E-mail:jinxh.syky@sinopec.com.

中图分类号: TE132.1
计量
- 文章访问数: 721
- HTML全文浏览量: 92
- PDF下载量: 261
- 被引次数: 0
出版历程
- 收稿日期: 2016-05-08
- 修回日期: 2016-08-03
- 刊出日期: 2016-09-28

Geochemical characteristics and significance of bitumen of Ordovician outcrops at the southern margin of Ordos Basin

1.
SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China
2. School of Geosciences, China University of Petroleum, Beijing 102249, China

摘要

摘要: 鄂尔多斯盆地南缘露头沥青赋存于下奥陶统亮甲山组灰岩裂缝中，裂缝近垂直于层面，沥青高约75m，宽约1~44cm，下宽上窄。其沥青质的碳同位素为-28‰，沥青等效反射率分布在1.829%~1.965%之间；沥青和上奥陶统背锅山组烃源岩均具有较低的Pr/Ph值、较高的C₂₄四环萜烷的生物标志物，沥青的C₂₉甾烷优势和低伽马蜡烷指数可能揭示其成烃母质形成于微咸水的低等海洋浮游生物的环境。沥青和背锅山组烃源岩规则甾烷组成均有“V”型特征，C₂₄四环萜烷/C₂₆三环萜烷、Tm／Ts值萜烷生物标志物参数值接近，表示他们具有亲缘关系。南缘奥陶系沥青地球化学特征及成因研究，对评价南缘下古生界碳酸盐岩的勘探潜力具有重要的理论和生产价值。
- 露头沥青 /
- 生物标志物 /
- 地球化学特征 /
- 奥陶系 /
- 鄂尔多斯盆地南部
Abstract: Outcrop bitumen occurs in the limestone cracks in the Lower Ordovician Liangjiashan Formation at the southern margin of Ordos Basin. The cracks are nearly vertical. The bitumen zone is about 75 m high and 1-44 cm wide, and is wide at the bottom and narrow on the top. The carbon isotope value of the bitumen is -28‰. Equivalent bitumen vitrinite reflectance ranges from 1.829%-1.965%. The bitumen and the source rocks in the Upper Ordovician Beiguoshan Formation have low Pr/Ph values and high C₂₄ tetracyclic terpane biomarker concentrations. Bitumen samples with C₂₉ sterane predominance and low gammacerane index reveal that hydrocarbon parent materials were formed in a low-brackish water environment from marine plankton. The composition of steroids is "V" type, and the biomar-kers such as C₂₄ tetracyclic terpanes/C₂₆ tricyclic terpanes and Tm/Ts are similar, indicating a genetic relationship. The geochemical characteristics and significance of bitumen of the Ordovician outcrops at the southern margin of Ordos Basin have helpful for the evaluation of the Lower Paleozoic carbonate source rocks.
- outcrop bitumen /
- biomarker /
- geochemical feature /
- Ordovician /
- southern margin of Ordos Basin

HTML全文

参考文献(15)

[1]	杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2002. Yang Junjie.Tectonic evolution and oil-gas reservoirs distribution in Ordos Basin[M].Beijing:Petroleum Industry Press,2002.
[2]	杨华,付金华,魏新善,等.鄂尔多斯盆地奥陶系海相碳酸盐岩天然气勘探领域[J].石油学报,2011,32(5):733-740. Yang Hua,Fu Jinhua,Wei Xinshan,et al.Natural gas exploration domains in Ordovician marine carbonates,Ordos Basin[J].Acta Petrolei Sinica,2011,32(5):733-740.
[3]	孙宜扑,王传刚,王毅,等. 鄂尔多斯盆地中奥陶统平凉组烃源岩地球化学特征及勘探潜力[J].石油实验地质,2008,30(2):162-168. Sun Yipu,Wang Chuangang,Wan Yi,et al.Geochemistry characteristics and exploration potential of Middle Ordovician Pingliang Formation in the Ordos Basin[J].Petroleum Geology & Experiment,,2008,30(2):162-168.
[4]	张春林,孙粉锦,刘锐娥,等.鄂尔多斯盆地南部奥陶系沥青及古油藏生气潜力[J].石油勘探与开发,2010,37(6):668-673. Zhang Chunlin,Sun Fenjin,Liu Rui'e,et al.Bitumen and hydrocarbon generation potential of paleo-reservoirs in the Ordovician,south Ordos Basin[J].Petroleum Exploration and Development,2010,37(6):668-673.
[5]	谢增业,胡国艺,李剑,等.鄂尔多斯盆地奥陶系烃源岩有效性判识[J].石油勘探与开发,2002,29(2):29-32. Xie Zengye,Hu Guoyi,Li Jian,et al.A study on validity identification of source rock by new experimental techniques for Ordovician in Ordos Basin[J].Petroleum Exploration and Development,2002,29(2):29-32.
[6]	戴金星.中国煤成大气田及气源[M].北京:科学出版社,2014:28-104. Dai Jinxing. Large gas field of coal-formed gas and gas source[M].Beijing:Science Press,2014:28-104.
[7]	戴金星,夏新宇.长庆气田奥陶系风化壳气藏、气源研究[J].地学前缘,1999,6(S1):195-202. Dai Jinxing,Xia Xinyu, Research on source rock correlation of the Ordovician reservoir,Changqin gasfield[J],Earth Science Frontiers,1999,6(S1):195-202.
[8]	Peters K E,Moldowan J M,Driscole A R,et al.Origin of beatrice oil by co-sourcing from Devonian and Middle Jurassic source rocks,Inner Moray Firth,United Kingdom[J].AAPG Bulletin,1989,73(4): 454-471.
[9]	Peter K E,Moldowan J M.The biomarker guide[M].Englewood Cliffs:Prentice-Hall Inc,1993.
[10]	王铁冠.我国一些地区原油与生油岩中某些沉积环境生物标志物初探[M].北京:中国地质大学出版社,1980:99-115. Wang Tieguan.The crude oil and source rocks in some regions of our country in some biomarkers of sedimentary environment[M].Beijing:China University of Geosciences Press,1980:99-115.
[11]	翟光明.中国石油地质志卷十二:长庆油田[M].北京:石油工业出版社,1992:203-210. Zhai Guangming.Chinese petroleum geology vol.12:Changqing oilfield[M].Beijing:Petroleum Industry Press,1992:203-210.
[12]	Palacas J G.Petroleum geochemistry and source rock potential of carbonate rocks[M].Tulsa, OK:AAPG,1984:102-110.
[13]	Moldoman J M,Lee C Y,Watt D S,et al. Analysis and occurrence of C₂₆-steranes in petroleum and source rocks[J].Geochimica et Cosmochimica Acta,1991,55(4):1065-1081.
[14]	朱建辉,吕剑虹,缪九军,等.鄂尔多斯西南缘下古生界烃源岩生烃潜力评价[J].石油实验地质,2011,33(6):662-670. Zhu Jianhui,Lü Jianlong,Miao Jiujun,et al.Hydrocarbon gene-ration potential of Lower Paleozoic source rocks in southwestern margin of Ordos Basin[J].Petroleum Geology & Experiment,2011,33(6):662-670.
[15]	Huang W Y,Meinschen W G.Sterols in sediments from Baffin Bay,Texas[J].Geochimica et Cosmochimica Acta,1978,42(9):1391-1396.