新疆石油地质

新疆石油地质 ›› 1995, Vol. 16 ›› Issue (4): 319-323.

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塔里木盆地下古生界白云石化成因机理及模式探讨

沈昭国, 陈永武, 郭建华   

  1. 石油地质 西南石油学院 四川南充 637001
  • 收稿日期:1995-08-15 出版日期:1995-12-01 发布日期:2021-01-15
  • 作者简介:沈昭国 副教授

DISCUSSION ON GENETIC MECHA-NISM AND MODEL FOR DOLOMITIZATION, LOWER PALEOZOIC,TARIM BASIN

Shen Zhaoguo, Chen Yongwu, Guo Jianhua   

  1. Petroleum Geology Southwest Petroleum Institute Nanchong, Sichuan 637001
  • Received:1995-08-15 Online:1995-12-01 Published:2021-01-15
  • About author:Shen Zhaoguo, Associate Professor

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摘要： 白云岩是塔里木盆地下古生界碳酸盐岩中的重要储集岩类， 白云石化的成因机理基本有3种类型: (1)毛细管浓缩与渗透回流白云石化; (2) 混合水白云石化; (3) 晚期深埋藏压实流白云石化。 建立相关的成因模式有助于了解、预测白云岩在时间和空间上的展布规律， 指导油气勘探。在塔里木盆地不同地区、不同时代的白云岩具有不同的成因机理， 其中对储层贡献较大的是晚期深埋藏压实流和混合水白云石化。 白云岩深埋地下， 具有良好的储集空间， 可以形成高产油气藏。

关键词: 塔里木盆地, 早古生代, 白云石化, 储集层, 成因, 模式

Abstract: Dolomite is an important reservoir rock in the carbonate of the Lower Paleozoic,Tarim basin，in which dolomitization took place in (1)capillary concentration and seawater-seepage/reflux, (2)mixed-water, and (3)deeper burial compaction flow at late diagenetic stage.To develop related dolomitization genetic models contributes to understanding and predicting the distribution of dolomite in time and space, guiding the petroleum exploration.Dolomites occurred in different areas and different geologic time in Tarim basin showed different diagenetic mechanism, in which dolomitization of deeper burial compaction flow and mixed water at late diagenetic stage contributes more to the reservoir rock.Deeper burial dolomite with good pore space can form prolific reservoir.

Key words: Tarim basin, Early Paleozoic, Dolomitization, Reservoir, Origin, Mode