摘要
综合运用岩心资料分析、常规与铸体薄片、扫描电镜、阴极发光、X-衍射等多种分析手段,对歧口凹陷扣村地区沙一下亚段湖相碳酸盐岩储层成岩作用进行了系统分析。研究结果表明,该研究区内沙一下段各种成岩作用发育,压实(溶)作用、多世代的方解石和白云石的胶结作用导致原生孔隙和次生孔隙几乎消失;早晚两期的溶蚀作用和同生-准同生期白云石化作用对储层物性改善具有建设性的作用。此外,该研究区沙一下段湖相碳酸盐岩已经由早成岩阶段进入了中成岩阶段门限。
Multiple analysis methods including core observation,general and casting slice,scan electron microscope,cathodoluminescence,X-ray diffraction,etcare adopted to study the diagenesis of carbonate rocks in the lower member of Es1 in Koucun Area.The result shows that the diagenetic evolutionary process of carbonate rocks in the lower member of Es1 is characterized by variety of diagenetic types.The compaction and pressure solution action and the multi-stage calcites and dolomite cementations result in primary porosity and secondary porosity almost disappeared.Dissolution,syngenetic-penecontemporaneous dolomitization play a constructive role in the improvement of reservoir properties at the early and late stages.The carbonate rocks in the lower member of Eogene Es1 end early diagenetic stage,and enter into the diagenetic stage.
出处
《长江大学学报（自科版）（中旬）》
CAS
2013年第1期28-30,37,共4页
Journal of Yangtze University(Nature Science Edition)
关键词
成岩作用
湖相碳酸盐岩
沙一下亚段
扣村地区
歧口凹陷
diagenesis
lacustrine carbonate rocks
lower member of Shahejie Formation
Koucun Area
Qikou Depression
