• 责任者：Wang Xiuping (College of Geosciences and Engineering ; Shandong University of Science and Technology ; Qingdao 266590 ; China) ; Mu Chuanlong
• 刊名：Acta Petrolei Sinica
• 出版年：2013
• 卷期：34(5)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 成岩作用 ; diagenesis ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.883-895
• 图表：5 illus., 3 tables, 38 refs.
• 分类号：1003
• issnNo：ISSN0253-2697
• isbnNo：CN11-2128/TE

     Based on microscopic observations, fluid inclusions and thermodynamic analyses of various diagenetic reactions in acidic and alkaline fluid media, and combined with evolutionary history of organic matter and burial history, diagenetic evolution and fa- cies of reservoirs in Member 8 of Xiashihezi Formation in the Z30 block of Sulige Gasfield were classified. The result showed that the Member 8 of Xiashihezi Formation reservoirs experienced at least four evolutionary stages of diagenesis, namely the syndiage- netie to early Period A of Early Diagenesis weak-acid corrosion stage, the late Period A to Period B of Early Diagenesis acid cor- rosion stage, the Period A to early Period B of Middle Diagenesis acid dissolution stage, and finally the late Period B of Middle Diagenesis to epigenetic alkaline metasomatism and cementation stage. The epigenetic stage emerged during the uplift of the study area. After the diagenetic evolution, five types of diagenetic facies were formed in this area, i. e, unstable component dissolution chlorite film facies of arenite, unstable component dissolution kaolinite and siliceous cementation facies of are nite, kaolinite and siliceous cementation unstable component dissolution facies of arenite, unstable component dissolution carbonate dense cementation facies of arenite, and miscellaneous matrix-filled dense compaction facies of greywacke. The acid dissolution stage is a critical period for the formation of main reservoir space, which makes the unstable component dissolu- tion-chlorite film facies of arenite, the unstable component dissolution kaolinite and siliceous cementation facies of arenite and the kaolinite and siliceous cementation unstable component dissolution facies of arenite as the constructive diagentic facies of reservoirs.