Affect of Feldspar Dissolution to Properties of Sandstone Reservoir of Chang-8 Oil Layer in Jiyuan Area, Ordos Basin

• 责任者：He Yanxiang (State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation ; Institute of Sedimentary Geology ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhang Wei
• 刊名：Natural Gas Geoscience
• 出版年：2010
• 卷期：21(3)
• 关键词：长石族 ; feldspar group ; 砂岩储集层 ; sandstone reservoirs ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.482-488
• 图表：5 illus., 2 tables, 14 refs.
• 分类号：1003
• issnNo：ISSN1672-1926
• isbnNo：CN62-1177/TE

Based on casting thin section, cathodoluminescence, scanning electron microscope, the authors discuss the lithological feature, petrophysical property and diagenesis of sandstone in the Chang 8 oil layer of Jiyuan area of Ordos Basin. The research results show that the reservoir rock consists of feldspathic lithic sandstone and lithic feldspathic sandstone, with low compositional maturity and textural maturity, and average value of Q1/(F1+R1) less than 0.8.The dissolution of feldspar in the reservoir rock was happened under diagenetic fluid and atmospheric water action.