镇泾地区长8 致密砂岩储层成岩作用研究
网络出版日期: 2013-09-26
基金资助
国家重大科技专项“鄂尔多斯盆地大牛地致密低渗气田开发示范工程”(编号:2011ZX05045-01)资助
Study on diagenesis of Chang 8 tight sandstone reservoir in Zhenjing area
Online published: 2013-09-26
皮雄 , 节丽 . 镇泾地区长8 致密砂岩储层成岩作用研究[J]. 岩性油气藏, 2013 , 25(5) : 31 -36 . DOI: 10.3969/j.issn.1673-8926.2013.05.006
The sand ofChang 8 reservoir ofUpper Jurassic Yanchang Formation in Zhenjing area belongs to tight and low permeability reservoir. Based on the analysis of cast thin section, cathodeluminescence and scanning electronic microscope, this paper studied the characteristics and types of diagenesis ofChang 8 reservoir. The results showthat the sandstone reservoir in this area mainly experienced compaction, cementation and dissolution, the diagenetic evolution reached the middle diagenetic stage A, and reservoir physical properties were controlled by digenesis. Mechanical compaction and carbonate cementation are the major destructive diagenesis, the chlorite rimon the grain surface plays a constructive role in protecting primary intergranular pores, and the secondary pores created by dissolution of feldspar
improve the reservoir properties.
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