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古地理学报 ›› 2006, Vol. 8 ›› Issue (2): 259-268. doi: 10.7605/gdlxb.2006.02.008

• 综述 • 上一篇    下一篇

塔里木盆地东部下志留统下砂岩段储层特征

魏 伟   李 剑   王宏亮   冉启贵   

  1. 1 中国地质大学（北京）能源学院，北京 100083
    2 中国石油勘探开发研究院廊坊分院，河北廊坊 065007，
  • 出版日期:2006-04-01 发布日期:2006-04-01
  • 作者简介:魏伟，男，1966年出生，现为中国地质大学（北京）在读博士生和中国石油勘探开发研究院廊坊分院高级工程师，主要从事油气勘探与开发的研究工作。

Characteristics of the Lower Sandstone Member reservoir of Lower Silurian in eastern Tarim Basin

Wei Wei1     Li Jian     Wang Hongliang     Ran Qigui   

  1. 1 Institute of Energy, China University of Geosciences(Beijing), Beijing 100083
    2 Langfang Branch of Research Institute of Petroleum Exploration and Development, Langfang 065007, Hebei
  • Online:2006-04-01 Published:2006-04-01
  • About author:Wei Wei, born in 1966, now is a candidate for his Ph.D. degree at China University of Geosciences(Beijing), and a sineer engineer of Langfang Branch of Research Institute of Petroleum Exploration and Development. He is mainly engaged in the research of petroleum exploration and development.

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摘要：

塔里木盆地东部的志留系为一套海相碎屑岩沉积，现今仅保存有下志留统，分布在铁南2井、维马1井以南、阿南1井以北的东西向狭长地带内。下志留统的下砂岩段是油气勘探的主要目的层之一，发育扇三角洲沉积体系。下砂岩段储层岩性为岩屑砂岩，储集空间类型主要为剩余原生粒间孔，压实作用是影响储层物性的主要因素。在下砂岩段储层中，中砂岩的储集性能相对较好，其孔隙度多数在10%以上，是下砂岩段的主要含油气储层。后期的成岩作用改善了局部层段的储层物性。经历了漫长的地质演化后,下砂岩段依然保存有物性条件较好的储层段，可能蕴涵了商业油气储量。

Abstract:

The Silurian in the eastern Tarim Basin is a set of marine clastic sediments and only the Lower Silurian is preserved now, which is distributed in a eastern-western long and narrow belt.The belt lies south of the Well Tienan 2 and Well Weima 1, north of the Well A’nan 1. Fan delta sedimentary system is mainly developed. The Lower Sandstone Member reservoir is characterized by lithic sandstones and the main type of reservoir porosity is residual primary intergranular pore. Compaction is the important factor affecting the reservoir petrophysics. In the Lower Sandstone Member reservoir, the petrophysics of medium-grained sandstones is relatively favorable and their porosity is usually larger than 10%, and thus they constitute the main pay zone of the member. Diagenesis in the later period partly improved the petrophysics of some strata. After a long geologic evolution, the favorable reservoir intervals in the Lower Sandstone Member are preserved and may contain commercial quantities of petroleum.