西南石油大学学报(自然科学版) ›› 1988, Vol. 10 ›› Issue (1): 1-12.DOI: 10.3863/j.issn.1000-2634.1988.01.001

• 论文 •    下一篇

四川重庆天府地区上二叠统生物礁的成岩作用与孔隙演化

郭一华
  

  1. 石油勘探系
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1988-02-20 发布日期:1988-02-20

DIAGENESIS AND POROSITY EVOLUTION OF UPPER PERMIAN REEF IN TIANFU CHONGQING SICHUAN

Gna Yihua   

  • Received:1900-01-01 Revised:1900-01-01 Online:1988-02-20 Published:1988-02-20

摘要:

本文着重探讨天府地区上二叠统生物礁群的成岩作用特征,本区主要有:泥晶化作用、填积作用、胶结作用、白云石化作用、去白云石化作用、硅化作用、溶解作用、新生变形作用、压实作用和压溶作用。 根据生物礁群成岩历史过程中的成岩作用特征,可以识别出四种主要成岩环境,海底成岩环境:大气渗流和潜流成岩环境,浅埋藏和深埋藏成岩环境,表生成岩环境。 结合四川盆地的地质发展史与碳酸盐岩的成岩特征讨论了孔隙的演化。

关键词: 上二迭统, 礁, 成岩作用, 成岩环境, 特征演化

Abstract: This paper studies the diagenesis of Upper Permian reefs in Tianfu area, Chongqing, Sichuan. Microcrystalization, interstitial sedimentation, cementation, dolomitization, silification, solution, neomorphism, compaction, pressure solution are formed in this area.Four diagenetic environments, i.e.the submarine, the meteoric phreatic and vadose, the shallow buried and deep buried, and epidiagesis environments are determined by the diagenetic features in the diagenetic history of reefs.The evolution of porosity isdiscussed by combing the diagenesis of carbonate rocks with the geological history of Sichuan Basin.