Lithologic Reservoirs ›› 2020, Vol. 32 ›› Issue (1): 11-18.doi: 10.12108/yxyqc.20200102

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Genesis types and accumulation characteristics of crude oil in southeast slope of Weixinan Depression,Beibuwan Basin

JIN Qiuyue   

  1. Zhanjiang Branch of CNOOC Limited, Zhanjiang 524057, Guangdong, China
  • Received:2019-07-08 Revised:2019-07-25 Online:2020-01-21 Published:2019-11-22

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Abstract: The southeast slope in Weixinan Depression of Beibuwan Basin is an important hydrocarbon accumulation area. In order to study the genesis types and accumulation characteristics of its crude oil,the biomarkers and isotopic geochemical characteristics of the crude oil in the southeast slope were analyzed. The results show that:(1)The crude oil in the southeast slope can be divided into two types. The first type of crude oil has low 4-methyl sterane abundance and low carbon isotope, and mainly distributed in the first member of Liushagang Formation,while the second type of crude oil has high 4-methyl sterane abundance and higher carbon isotope,and mainly distributed in the second and third member of Liushagang Formation and Weizhou Formation.(2)Hydrocarbon source rocks in the southeast slope can be divided into two hydrocarbon combination through geochemistry characteristics in combination with sedimentary environment. The upper hydrocarbon combination mainly includes the mudstone of the first member of Liushagang Formation and the middle mudstone of the second member of Liushagang Formation,while the lower hydrocarbon combination mainly includes the bottom oil shale of the second member of Liushagang Formation and the upper mudstone of the third member of Liushagang Formation.(3)Through analyzing the biomarkers and isotopic characteristics of oil and source rocks, it is concluded that the first type of crude oil is from the upper hydrocarbon combination,and the second type of crude oil is from the lower hydrocarbon combination. The petrofacies of source rocks controlled the distribution of different types of crude oil. The second and third member of Liushagang Formation,Jiaowei Formation,Xiayang Formation and basement weathering crust in the southeast slope are all favorable areas for searching for the second type of crude oil,while lithologic traps in the first member of Liushagang Formation are favorable areas for searching for the first type of crude oil.

Key words: carbon isotope, biomarkers, oil source correlation, accumulation characteristics, Weixinan Depression, Beibuwan Basin

CLC Number: 

  • TE122.1
[1] 朱伟林, 江文荣.北部湾盆地涠西南凹陷断裂与油气藏.石油学报, 1998, 19(3):6-10. ZHU W L, JIANG W R. Relations between fractures and hydrocarbon reservoirs in Weixinan Sag. Acta Petrolei Sinica, 1998, 19(3):6-10.
[2] 黄保家, 黄合庭, 吴国瑄, 等.北部湾盆地始新统湖相富有机质页岩特征及成因机制.石油学报, 2012, 33(1):25-31. HUANG B J, HUANG H T, WU G X, et al. Geochemical characteristics and formation mechanism of Eocene lacustrine organicrich shales in the Beibuwan Basin. Acta Petrolei Sinica, 2012, 33(1):25-31.
[3] 朱伟林, 吴国暄, 黎明碧.南海北部陆架北部湾盆地古湖泊与烃源条件. 海洋与湖沼, 2004, 35(1):8-14. ZHU W L, WU G X, LI M B. Palaeolimology and hydrocarbon potential in Beibu Gulf Basin of South China Sea. Oceanologia et Limnologia Sinica, 2004, 35(1):8-14.
[4] 包建平, 朱翠山, 倪春华.北部湾盆地不同凹陷原油生物标志物分布与组成特征.沉积学报, 2007, 25(4):646-652. BAO J P, ZHU C S, NI C H. Distribution and composition of biomarkers in crude oils from different sags of Beibuwan Basin. Acta Sedimentologica Sinica, 2007, 25(4):646-652.
[5] 包建平, 刘玉瑞, 朱翠山, 等.北部湾盆地原油地球化学特征与成因类型.石油与天然气地质, 2007, 28(2):293-298. BAO J P, LIU Y R, ZHU C S, et al. Geochemical characteristics and genetic types of crude oils in Beibuwan Basin. Oil & Gas Geology, 2007, 28(2):293-298.
[6] 潘贤庄.北部湾原油中的生物标志物及其地质-地球化学意义.沉积学报, 1997, 15(3):202-206. PAN X Z. Biomarkers and its geological-geochemical significance in crude oils from Beibu Gulf Basin. Acta Sedimentologica Sinica, 1997, 15(3):202-206.
[7] HUANG B J, XIAO X M, CAI D S, et al. Oil families and their source rocks in the Weixinan Sub-basin,Beibuwan Basin, South China Sea. Organic Geochemistry, 2011, 42(1):134-145.
[8] 邓运华.试论中国近海两个坳陷带油气地质差异性.石油学报, 2009, 30(1):1-8. DENG Y H. Analysis on differences of petroleum type and geological conditions between two depression belts in China offshore. Acta Petrolei Sinica, 2009, 30(1):1-8.
[9] 龚再升.南海北部大陆边缘盆地油气成藏动力学研究. 北京:科学出版社, 2004:9-24. GONG Z S. The research of dynamics of hydrocarbon accumulation in the marginal basin of northern South China Sea. Beijing:Science Press, 2004:9-24.
[10] 何家雄, 刘海龄, 姚永坚, 等.南海北部边缘盆地油气地质及资源前景.北京:石油工业出版社, 2008:1-185. HE J X, LIU H L, YAO Y J, et al. The petroleum geology and resource potential in the marginal basin of northern South China Sea. Beijing:Petroleum Industry Press, 2008:1-185.
[11] 郑冰, 高仁祥.塔里木盆地原油碳硫同位素特征及油源对比. 石油实验地质, 2006, 28(3):281-285. ZHENG B, GAO R X. Characteristics of carbon and sulfur isotopes in crude oil and oil-source correlation in the Tarim Basin. Petroleum Geology & Experiment, 2006, 28(3):281-285.
[12] 刘金萍, 耿安松, 熊永强, 等.正构烷烃单体碳、氢同位素在油源对比中的应用.新疆石油地质, 2007, 28(1):104-107. LIU J P, GENG A S, XIONG Y Q, et al. Application of free C and H isotopes in normal alkane to correlation of oil sources in Huanghua Depression. Xinjiang Petroleum Geology, 2007, 28(1):104-107.
[13] PETERSEN H I, ANDSBJERG J, BOJESEN-KOEGOED J A, et al. Coal generated oil source rock evaluation and petroleum geochemistry of the Lulita Oilfield, Danish North Sea. Journal of Petroleum Geology, 2000, 23(1):55-90.
[14] RADKE M, WELTE D H. The methylphenanthrene index(MPI):a maturity parameter based on aromatic hydrocarbons? Bjory M J. Advance in Organic Geochemistry. Hoboken:John Wiley and Sons Limited, 1981:504-512.
[15] SEIFERT W K, MOLDOWAN J M. Paleoreconstruction by biological markers. Geochimica et Cosmochimica Acta, 1981, 45(2):783-794.
[16] FU J M, SHENG G Y, XU J Y, et al. Application of biological markers in the assessment of paleoenvironment of Chinese nonmarine sediments. Organic Geochemistry, 1990, 16(3):769-779.
[17] SNOWDON L R, POWELL T G. Immature oils and condensate modification of hydrocarbon generation model for terrestrial organic matter. AAPG Bulletin, 1982, 66(6):775-788.
[18] 孔祥星. 准噶尔盆地南缘西部山前断褶带油源分析.石油勘探与开发, 2007, 34(4):413-418. KONG X X. Oil source of foothill fault-fold structural belt in western part of the southern margin, Junggar Basin. Petroleum Exploration and Development, 2007, 34(4):413-418.
[19] 卢双舫,张敏.油气地球化学.北京:石油工业出版社, 2008:174-155. LU S F, ZHANG M. Petroleum geochemistry. Beijing:Petroleum Industry Press, 2008:174-155.
[20] 张枝焕, 曾艳涛, 张学军, 等.渤海湾盆地沾化凹陷渤南洼陷原油地球化学特征及成藏期分析.石油实验地质, 2006, 28(1):54-58. ZHANG Z H,ZENG Y T,ZHANG X J,et al. The geochemistry characteristics and accumulation-history of crude oil in the Bonan Sub-sag of the Zhanhua Sag, the Bohaiwan Basin. Petroleum Geology & Experiment, 2006, 28(1):54-58.
[21] 宋国奇, 刘华, 蒋有录, 等.沾化凹陷渤南洼陷沙河街组原油成因类型及分布特征.石油实验地质, 2014, 36(1):33-38. SONG G Q, LIU H, JIANG Y L, et al. Genetic types and distribution characteristics of crude oils from Shahejie Formation in Bonan Subsag, Zhanhua Sag, Jiyang Depression. Petroleum Geology & Experiment, 2014, 36(1):33-38.
[22] 唐建云, 王志维.鄂尔多斯盆地旬邑探区延长组烃源岩及原油地球化学特征.岩性油气藏, 2017, 29(2):107-116. TANG J Y, WANG Z W. Source rocks and geochemical characteristics of crude oil of the Yanchang Formation in Xunyi exploration area, Ordos Basin. Lithologic Reservoirs, 2017, 29(2):107-116.
[23] 袁媛, 杜克锋, 葛云锦, 等.鄂尔多斯盆地甘泉-富县地区长7烃源岩地球化学特征.岩性油气藏, 2018, 30(1):39-45. YUAN Y, DU K F, GE Y J, et al. Geochemistry of hydrocarbon source rocks of Chang 7 in Ganquan-Fuxian area. Ordos Basin. Lithologic Reservoirs, 2018, 30(1):39-45.
[24] 曹跃, 刘延哲, 陈义国, 等. 鄂尔多斯盆地东韩油区延长组长7-长9油气成藏条件及主控因素. 岩性油气藏, 2018, 30(1):30-38. CAO Y, LIU Y Z, CHEN Y G, et al. Hydrocarbon accumulation conditions and main controlling factors of Chang 7-Chang 9 oil reservoirs of Yanchang Formation in Donghan region, Ordos Basin. Lithologic Reservoirs, 2018, 30(1):30-38.
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