饶阳凹陷古近系成岩作用特征

Diagenesis of the Palaeogene clastic rocks in the Raoyang depression

1. College of Geo-resources and Information, China University of Petroleum, Qingdao 266555, Shandong, China;
2. Research Center, CNOOC, Beijing 100027, China

摘要: 通过26口井岩石薄片和铸体薄片的镜下观察及14口井扫描电镜等资料的分析,对饶阳凹陷古近系碎屑岩储层的岩石学特征、成岩作用及成岩相进行了研究。研究区储层砂岩的成分成熟度和结构成熟度均较低,岩石类型以长石砂岩和岩屑长石砂岩为主,磨圆中等,多呈次棱-次圆状,分选中等偏差。成岩作用主要有压实作用、胶结作用、交代蚀变作用、溶解作用等。中深部储层的成岩相组合可划分为胶结-溶解成岩相、胶结成岩相、压实-胶结成岩相、胶结-溶解-交代成岩相4种类型。
- 饶阳凹陷 /
- 古近系 /
- 岩石学特征 /
- 成岩作用 /
- 成岩相
Abstract: The present paper deals,in the light of thin-section and SEM examinations,with lithology,diagenesis and diagenetic facies of the Palaeogene clastic rocks in the Raoyang depression.The sandstone reservoirs have low compositional and textural maturity and moderate roundness and sorting,and consist dominantly of feldspar sandstone and lithic feldspar sandstone.The diagenesis comprises compaction,cementation,metasomatic alteration and dissolution.The diagenetic facies associations from the sandstone reservoirs in the middle and deeper parts may be grouped into four types: cementation-dissolution,cementation,compaction-cementation and cementation-dissolution-metasomatism.
- Raoyang depression /
- Palaeogene /
- lithology /
- diagenesis /
- diagenetic facies