西南石油大学学报(自然科学版) ›› 1996, Vol. 18 ›› Issue (4): 9-14.DOI: 10.3863/j.issn.1000-2634.1996.04.002

• 石油地质勘探 • 上一篇    下一篇

张强凹陷上侏罗统成岩作用及储层分布

曾伟
  

  1. 石油勘探系
  • 收稿日期:1995-06-05 修回日期:1900-01-01 出版日期:1996-11-20 发布日期:1996-11-20

Diagenesis and Reservoir Distribution of Upper Jurassic Series in Zhangqiang Hollow

Zeng Wei   

  1. Dept. of Petroleum exploration, SWPI, Sichuan, 637001
  • Received:1995-06-05 Revised:1900-01-01 Online:1996-11-20 Published:1996-11-20

摘要: 上侏罗统碎屑岩为成熟度低的岩屑砂岩,岩石经历了多种成岩变化,降低孔隙度的成岩作
用主要为压实作用和方解石、沸石、伊利石及绿泥石的胶结作用,增大孔隙度的成岩作用为溶蚀作用。储层有5种成岩演化序列,相应的有5种成岩相,以绿泥石胶结成岩相储层物性最好。成岩相与沉积相、成岩作用阶段及最大埋深有关。成岩相分布决定了储层分布,从而可利用成岩相较准确预测储层发育带。

关键词: 孔隙度, 成岩作用, 成岩相, 储层分布

Abstract: The clastic rock of Upper Jurassic Series is a low mature litharenite. Many diageneses have happened in reservoirs. The diageneses which decrease the porosity of reservoirs are compaction, cementation of calcite, zeolite, illite and chlorite. The diagenesis which increases the porosity of reservoirs is corrosion. There are five diagenetic sequences and facieses in reservoirs. The diagenetic facies of chlorite cement has the highest porosity of all the facieses. Diagenetic facieses are correlated with sedimentary facieses, diagenetic periods and maximum burial depth. Since reservoirs are decided by diagenetic facieses, reservoirs can be accurately forecast by them.

Key words: Porosity, Diagenesis, Facies, Reservoir distribution

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