Clay Minerals and Their Influences on Petrophysical Property in the Strong Overpressured Reservoir
详细信息
- 责任者：Wang Qingbin (Research Institute of Exploration and Development ; Bohai Oilfield ; Tianjin Branch ; CNOOC ; Tianjin 300452 ; China) ; Li Jianping
- 刊名：Xinjiang Petroleum Geology
- 出版年：2012
- 卷期：33(2)
- 关键词：储集层 ; reservoirs ; 粘土矿物 ; clay minerals ; 超压 ; overpressure ; 渤中坳陷 ; Bozhong Depression
- 页码：p.185-188
- 图表：7 illus., 3 tables, 10 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
By using the data of thin section,SEM,X-ray diffraction and formation testing,the differences of clay mineral between normal pressured reservoir and strong overpressured reservoir of Dongying Formation in A2-1 structure in Bozhong Depression were compared,and the influence of clay mineral on reservoir quality was analyzed.The results show that the strong overpressured reservoir is characterized by low kaolinite content and high illite content.The montmorillonites content of illite/montmorillonite mixing layer is normally higher than that of mudstone and normal pressured reservoir.It is concluded that thick and relatively coarse particle interlayers in coarse and thick overpressured reservoir,moderate overpressured reservoir and strong overpressured reservoir could be of high-yield potentials.
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