新疆石油地质 ›› 2006, Vol. 27 ›› Issue (2): 151-155.

• 油气勘探 • 上一篇    下一篇

塔中志留系沥青砂岩的地质特征及研究进展

郭建军, 陈践发   

  1. 中国石油大学资源与信息学院油气成藏机理教育部重点实验室, 北京 102249
  • 收稿日期:2005-06-14 修回日期:2005-06-14 出版日期:2006-04-01 发布日期:2020-10-30
  • 作者简介:郭建军(1974-) , 男, 甘肃会宁人, 工程师, 在读博士研究生, 油气地球化学,(Tel) 010-89734164(E-mail) jianjun_guo@126.com

Geologic Featur e and Study Progr ess of Silur ian Asphaltic Sandstone in Tazhong Area, Tarim Basin

GUO Jian-jun, CHEN Jian-fa   

  1. Key Laboratory of Oil-Gas Accumulation Mechanism, Ministry of Education, Institute of Resources and Information, China University of Petroleum, Beijing 102249, China
  • Received:2005-06-14 Revised:2005-06-14 Online:2006-04-01 Published:2020-10-30

摘要: 塔里木盆地塔中地区广泛分布着志留系沥青砂岩, 主要分布在古隆起和早古生代生油盆地的上倾方向, 表明本区规模巨大的志留系沥青砂岩可能为古油藏露头带。沥青砂岩的分布主要受油源区、古隆起、沉积体系以及储集层物性的综合控制, 沥青的微观特征也反映了志留系油气多期注入和破坏的历史。油质沥青与胶质-沥青质的含量呈彼此消长关系, 沥青含量高的部位可动油相对较少。由于存在不同期次的沥青, 沥青反射率的数据比较离散。总体而言,沥青反射率均较低, 为0.15%~0.50%. 通过烃源岩及构造演化史研究认为, 塔中志留系沥青砂岩的油源主要为中-下寒武统。

关键词: 塔里木盆地, 塔中隆起, 志留系, 沥青砂岩

Abstract: The Silurian asphalt sandstone is widespread in Tazhong area of Tarim basin and mainly found in the upper slope of paleouplift and oil-generating basin of Lower Paleozoic, which shows that the widespread asphalt sandstone could be the outcrop of paleo-oil pools in this area. The distribution of asphalt sandstone is mostly controlled by oil source, paleo-uplift, sedimentary system and petrophysical property. Microscopically, the asphalt characteristic also reflects the multi-stage filling and destructive accumulation history of Silurian hydrocarbons, with ebb and flow of oily bitumen content and colloid-asphltenes content. The strata with high asphltenes content appear relatively low volume of movable oil, and the bituminous reflectance is low and scattered, averaging 0.15%~0.50%. It is concluded that the source supply of Silurian asphalt sandstone is mainly from Middle and Lower Cambrian.

Key words: Tarim basin, Tazhong uplift, Silurian, asphalt sandstone

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