摘要
根据铸体薄片、扫描电镜、X射线衍射等分析,研究了定边地区盒8段储层砂体的岩石学特征和成岩作用。结果表明:该区储层砂体以岩屑砂岩和岩屑石英砂岩为主,砂岩的成分成熟度较高,结构成熟度中等;盒8段储层砂岩成岩演化阶段处于中成岩阶段B期;早期的压实-压溶作用和胶结作用,对储层物性起破坏性作用;后期的溶蚀作用形成的次生孔隙对储层物性起到了明显的改善作用。深入研究成岩作用,可大幅度提高该区对储层评价与预测的精度。
Based on the analysis of casting slice, scanning electron microscope and X-ray diffraction, this paper studied the characteristics of lithology and diagenesis of the eighth member of Shihezi Formation in Dingbian area. The result shows that the main sand bodies in this area are lithic sandstone and lithic quartz sandstone, and the compositional maturity is high and the textural maturity is medium. The sandstone is in the B stage of middle diagenetic stage. The early compaction- pressolution and cementation are destructive for the reservoir properties, while the secondary pores formed by dissolution are constructive for the reservoir properties. The study of diagenesis can provide theoretical criterion for reservoir evaluation and prediction.
出处
《岩性油气藏》
CSCD
2013年第1期40-44,共5页
Lithologic Reservoirs
基金
中国石油长庆油田勘探开发研究院科技项目"定边地区上古生界盒8段储层综合评价研究"(编号:2011ZX05007-004)资助
关键词
盒8段储层
成岩作用
成岩序列
定边地区
鄂尔多斯盆地
the eighth member of Shihezi Formation
diagenesis
diagenetic sequence
Dingbian area
Ordos Basin
