摘要
通过普通薄片、铸体薄片、扫描电镜、X-射线衍射分析,对昆北油田切6井区E1+2和E31砂岩储层成岩作用类型、演化阶段、演化序列及储层物性的影响因素进行了研究。结果表明:E1+2和E31砂岩处于中成岩阶段A亚期的末期,成岩作用类型主要有压实作用、胶结作用、溶蚀作用、交代作用、破裂作用;较强的压实作用、石英次生加大、方解石及硬石膏等矿物的胶结作用是使储层物性变差的重要因素;长石、岩屑和方解石胶结物的溶蚀作用以及砂岩破裂作用使储层物性得到改善。
Based on the analysis of ordinary thin sections, cast thin sections, scanning electron microscope and X-ray diffraction, this paper studied the diagenesis types, evolutionary phase, evolutionary series and influencing factors of reservoir properties of E1＋2 and E31 in Qie 6 well area of Kunbei Oilfield. The result shows that the sandstone of E1＋2 and E31 is in the late stage of middle diagenetic stage A, and the main diagenesis types are compaction, cementation, dissolution, metasomatism and cataclasis. The experienced compaction, quartz secondary enlargement and cementation of calcite and anhydrite are the main destructive factors of reservoir properties, while the dissolution of feldspar, detritus and calcite and cataclasis are the constructive factors of reservoir properties.
出处
《岩性油气藏》
CSCD
2011年第6期13-17,共5页
Lithologic Reservoirs
基金
中国石油天然气股份有限公司重大科技项目"柴达木盆地油气勘探开发关键技术研究"子课题"柴西地区富油气凹陷圈闭精细评价及钻探目标选择"资助(编号:07-01Z-01-02)
关键词
成岩作用
成岩演化
储层物性
切6井区
昆北油田
柴达木盆地
diagenesis
diagenetic evolution
reservoir properties
Qie 6 well area
Kunbei Oilfield
Qaidam Basin
