Overpressure preventing quartz cementation? - Comment to Stricker et al. (2016)

详细信息    查看全文

• 作者：Tom Erik Maast
• 关键词：Quartz cementation ; Grain coating ; Diagenesis ; Reservoir quality ; Skagerrak Formation
• 刊名：Marine and Petroleum Geology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：79
• 期：Complete
• 页码：335-336
• 全文大小：183 K
• 卷排序：79

文摘

There is increasing evidence that quartz cementation can be viewed as a process controlled by temperature and insensitive to effective stress. This view of quartz cementation in sandstones is often referred to as the illite-mica induced dissolution model (IMID), which assumes quartz dissolution to occur along stylolites and clay laminae rather than at quartz-quartz grain contacts. In the present comment it is argued that the exceptional reservoir quality in the Skagerrak Formation of the Heron Cluster, North Sea, is due to grain coatings and rapid Cenozoic burial limiting the exposure to quartz cementation. This line of reasoning implies overpressure has had neglectable porosity preserving effect in the Heron Cluster.