石油与天然气地质 ›› 2010, Vol. 31 ›› Issue (1): 63-68,75.doi: 10.11743/ogg20100111

• 外围探区 • 上一篇    下一篇

塔中Ⅰ号带奥陶系烃包裹体荧光特征与成藏期

张鼐1, 赵瑞华2, 张蒂嘉1, 陈延贵3, 邢永亮2   

  1. 1. 中国石油天然气股份有限公司, 石油勘探开发研究院, 提高石油采收率国家重点实验室, 北京, 100083;
    2. 中国地质大学, 北京, 100083;
    3. CSIRO Petroleum, P.O.Box 1130, Bentley, WA6102, Australia
  • 收稿日期:2009-12-20 出版日期:2010-02-25 发布日期:2012-01-16

Fluorescence characteristics of the Ordovician hydrocarbon inclusions in the Tazhong-Ⅰ slope-break zone and the timing of hydrocarbon accumulation

Zhang Nai1, Zhao Ruihua2, Zhang Dijia1, Liu Keyu3, Chen Yangui2   

  1. 1. State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    2. China University of Geosciences, Beijing 100083, China;
    3. CSIRO Petroleum, Bentley, West Australia 6102, Australia
  • Received:2009-12-20 Online:2010-02-25 Published:2012-01-16

PDF (PC)

767

被引次数

31

摘要：

根据显微镜下烃包裹体的荧光特征、与方解石脉的穿插关系以及均一温度等特征,将塔中Ⅰ号坡折带奥陶系储层中发育的烃包裹体划分为4个期次;结合塔中地区区域构造演化特点,研究区四期烃包裹体分别对应着4个油气成藏期次,即志留纪末低成熟油形成时期,海西晚期生油期,早喜马拉雅期凝析油-湿气形成期,喜马拉雅期后期干气阶段。这4期烃包裹体在塔中Ⅰ号带奥陶系储层中具有明显的分带性,由东南浅埋藏油区向西北深埋油区将塔中Ⅰ号带奥陶系储层包裹体分布情况分成4个区域,其中第Ⅲ,Ⅳ期烃包裹体古油对现在油气藏起决定作用。

关键词: 荧光特征, 成藏期次, 奥陶系, 烃包裹体, 塔中Ⅰ号坡折带

Abstract:

Hydrocarbon inclusions in the Ordovician in the Tazhong-Ⅰ slope-break zone can be divided into four episodes of development according to their fluorescence characteristics,intercalating relationship with calcite vein,and homogeneous temperature,and so on.Based on the tectonic evolution of the area,it is believed these episodes correspond to four episodes of hydrocarbon pooling:low maturity oil accumulation at the end of Silu-rian,oil generation in the late Hercynian,condensate oil and wet gas accumulation in the early Himalaya,and dry gas accumulation in the late Himalayan.The distribution of these four episodes of inclusions presents clear zonation in the Ordovician reservoirs in the Tazhong-Ⅰbelt.Four zones are recognized from the shallow oil reservoir in the southeast to the deep oil reservoirs in the northwest.It is suggested that the fossil oil from the episode Ⅲ and Ⅳ played a dominant role in the formation of present hydrocarbon accumulations.

Key words: fluorescence characteristic, pooling episode, Ordovician, hydrocarbon inclusion, Tazhong-Ⅰslope-break zone

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