鄂尔多斯盆地西峰油田长8储层的砂岩成岩作用  

Sandstone diagenesis of Chang-8 reservoir in Xifeng Oilfield of Ordos Basin

作　　者：于波[1] 南珺祥[2] 张忠义[2] 

机构地区：[1]西北大学地质系,陕西西安710069 [2]中国石油长庆油田公司勘探开发研究院,陕西西安710004

出　　处：《兰州大学学报（自然科学版）》2007年第6期13-17,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家重点基础研究发展计划资助项目(2003CB214607).

摘　　要：根据砂岩薄片、铸体薄片、扫描电镜、X-衍射等分析,对西峰油田长8储层砂体的岩石学特征、成岩作用进行研究.研究表明:该区长8储层砂体成分主要以长石岩屑砂岩为主.储层砂岩的成岩处于晚成岩A期,早期的压实作用、多种矿物胶结作用是使物性变差的两个重要成岩作用,而溶蚀作用,特别是长石的溶蚀是储层物性变好的重要成岩控制因素.Based on the analysis of casting lamella, scan electron microscope and X-ray diffractions, this article researched into the characteristics of petrology and diagenesis on Chang-8 reservoir in Xifeng Oilfield of Ordos Basin. The study result showed that the main sandstone in the area is feldspathic litharenite with low compositional maturity. The diagenetic characteristics of Chang-8 sandston show that this set of sandstones are in the early period of the late diagenetic stage at present. The early diagenetic compaction and multi-mineral cementation are major effective factors that lead to poor petrophysical property of Chang-8 reservoir, while dissolution, in particular dissolution of feldspar, is one of significant factors controlling the quality of the reservoir.

关 键 词：鄂尔多斯盆地 成岩作用 储层 

分 类 号：P918.13[天文地球—自然地理学]