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南黄海盆地古近系烃源岩地球化学特征及油源对比
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  • 英文篇名:Geochemical Characteristics and Oil-Source Correlation of Paleogene Source Rocks in the South Yellow Sea Basin
  • 作者:徐建永 ; 朱祥峰 ; 宋宇 ; 胡守志
  • 英文作者:Xu Jianyong;Zhu Xiangfeng;Song Yu;Hu Shouzhi;CNOOC Research Institute Ltd.;Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences;
  • 关键词:烃源岩评价 ; 油源对比 ; 勘探前景 ; 古近系 ; 南黄海盆地 ; 海洋地质
  • 英文关键词:source rock evaluation;;oil-source correlation;;exploration prospect;;Paleogene;;South Yellow Sea Basin;;marine geology
  • 中文刊名:DQKX
  • 英文刊名:Earth Science
  • 机构:中海油研究总院有限责任公司;中国地质大学构造与油气资源教育部重点实验室;
  • 出版日期:2018-12-11 10:42
  • 出版单位:地球科学
  • 年:2019
  • 期:v.44
  • 基金:国家科技重大专项子课题(No.2016ZX05024-002-005);; 构造与油气资源教育部重点实验室开放课题(No.TPR-2017-08);; 中央高校基本科研业务费专项资金资助项目(No.CUG180613)
  • 语种:中文;
  • 页:DQKX201903013
  • 页数:11
  • CN:03
  • ISSN:42-1874/P
  • 分类号:170-180
摘要
南黄海盆地古近系烃源岩生烃潜力及原油来源,目前研究比较薄弱.通过对南部坳陷烃源岩和原油样品的有机地球化学分析,揭示古近系烃源岩和原油地球化学特征,并进行油源对比.结果表明南部坳陷古近系烃源岩主要发育在阜四段和阜二段,有机质丰度中等-好,有机质类型为Ⅱ_2-Ⅲ型,有机质为低成熟-成熟阶段.阜四段烃源岩形成于贫氧、较高盐度环境,阜二段烃源岩形成于厌氧、相对低盐度环境.原油的饱和烃含量较高,UCM鼓峰较小,已进入成熟阶段,对比结果显示戴南组原油可能来源于阜四段烃源岩,而阜三段原油可能与阜二段烃源岩有关.
        Researches on the hydrocarbon potential of the source rock in the Paleogene Funing Formation,and origin of the Paleogene crude oil in the southern depression of the South Yellow Sea Basin(SYSB)are relatively weak.Based on the systematically organic geochemical analyses(TOC,Rock-Eval,GC-MS of saturates and aromatics,stable carbon isotope)of the Paleogene core,cuttings,oil sand and crude oil samples,combined with vitrinite reflectance determination,the geochemical characteristics of source rocks and crude oil are revealed,and oil-source correlation is obtained.The results indicate that the Paleogene source rocks in the southern depression mainly deposited in the fourth (E_1f_4) and second memebers (E_1f_2) of Funing Formation,with moderate-good organic matter(OM)abundance,type Ⅱ_2-Ⅲ kerogen and within low mature-mature stage.Mixed OM sources,dominated by terrestrial OM are observed in E_1f_4 and E_1f_2 source rocks,biomarker ratios indicate that E_1f_4source rocks were deposited in dysoxic,relatively high salinity condition.Whereas during E_1f_2 source rocks deposition,anoxic and relatively low salinity condition is prevailed.The Paleogene crude oil contains relatively high saturates content,with small UCM peak,and has entered into the mature stage.Oil-source correlation results indicate that the Dainan crude oil(oil sand extraction)is related to the E_1f_4source rocks,whereas E_1f_3 crude oil may be derived from E_1f_2 source rocks.
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