石油学报 ›› 2000, Vol. 21 ›› Issue (6): 23-28.DOI: 10.7623/syxb200006004

• 地质勘探 • 上一篇    下一篇

塔里木盆地中上奥陶统油源层地球化学研究

张水昌1, 王飞宇2, 张保民1, 梁狄刚1, 赵孟军1   

  1. 1. 中国石油勘探开发研究院, 北京100083;
    2. 石油大学, 北京昌平102200
  • 收稿日期:1999-10-08 修回日期:2000-01-05 出版日期:2000-11-25 发布日期:2010-05-21
  • 作者简介:张水昌,男,1961年11月生,1991年毕业于中国地质大学(北京),获博士学位.现为中国石油勘探开发研究院高级工程师,油气地球化学重点实验室常务副主任.通讯处:北京学院路20号910信箱中国石油天然气集团公司油气地球化学要点实验室.
  • 基金资助:
    国家“九五”重点科技攻关项目(96-111);Stanford China Industrial Affiliates; Stanford Molecular Organic Geochemistr

MIDDLE-UPPER ORDOVICIAN SOURCE ROCK GEOCHEMISTRY OF THE TARIM BASIN

ZHANG Shui-chang1   

  1. Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:1999-10-08 Revised:2000-01-05 Online:2000-11-25 Published:2010-05-21

摘要: 通过对塔里木盆地古生界地层的沉积岩石学、有机地球化学、有机岩石学以及测井地质学等的综合研究,发现在满加尔凹陷南北斜坡带及柯坪露头区发育的中上奥陶统泥灰岩、泥页岩具有有机质丰度高(TOC0.5%~5.54%)、有机成熟度适中(VRE0.8%~1.3%)的特点,且具有一定的厚度分布.这套源岩的发育主要受上升洋流引起的高有机生产力带的控制,其生烃母质的构成具有浮游和底栖植物双重性.根据三芳甲藻甾烷和24-降胆甾烷等具有特殊生源和时代意义的生物标志物的油-岩对比分析和生烃史分析结果,证实目前在台盆区发现的工业性油流主要来源于这套地层.

关键词: 中上奥陶统, 台缘斜坡相, 半闭塞陆源海湾相, 油-岩对比, 生烃史, 上升洋流, 塔里木盆地

Abstract: By comprehensive study in sedimentary geology,organic geochemistry,seismic and logging geology,a set of potential midupper Ordovician source layers with 80~300m thick have been recognized.The source layers characterized by rich organic carbon(TOC 0.5%~5.54%) and moderate organic maturity(equivalent vitrinite reflectance 0.8%~1.3%) are mainly composed of argillaceous limestone,marl and shale which developed in the platform edge slope lim-mud mounds in the northern-southern slopes of the Manjiar sag and the restricted gulf facies in the Awati sag,respectively.The distribution of these source rocks was obviously controlled by high organic productivity zone caused by upwelling.Age- and environment-related biomarkers were combined basin modeling data to verify that the currently found commercial oil mainly originates from this set of source layer.

Key words: middle-upper Ordovician, platform edge slope lim-mud mounts, restricted gulf facies, oil-source correlation, Ageand environment-related biomarkers, hydrocarbon-generating history, upwelling, Tarim Basin

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