• 责任者：Tian Yaming (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Shi Zejin
• 刊名：Journal of Chengdu University of Technology
• 出版年：2011
• 卷期：38(4)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 胶结物 ; cement ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.378-384
• 图表：5 illus., 2 tables, 21 refs.
• 分类号：1003
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

The reservoir quality of Upper Triassic Yanchang Formation in Ordos Basin is seriously affected by the carbonate cements. The thin sections are analyzed, and the carbon and oxygen isotopes of carbonate cements and fluid inclusions are tested. The study results indicate that the carbonate cements of Member 8 of Yanchang Formation reservoir on the south-east edge of Ordos Basin are mainly iron carbonate cements calcite (ferrous calcite) cementation, which exist on the thin sandstone and thick sandstone to nearly mudstone. The carbonate cements fill pores with fine-grained and coarse-giant crystal particles. The test analysis results of the carbon and oxygen isotopes of the carbonate cements and fluid inclusions show that δ¹³CPDB value is -5.56‰～-0.22‰, and δ¹⁸OPDB -10.58‰～-21.47‰, that the fluid inclusion homogenization temperature is 58～121℃, and the main temperature ranges from 100～110 ℃.