摘要
在观察岩心并进行铸体薄片、扫描电镜、X衍射、物性、压汞等测试的基础上,分析了子洲气田北部盒8段储层的岩石学特征、物性及孔隙结构特征,深入研究其成岩作用特征并据此进行成岩相划分。子洲气田北部盒8段储层为典型的低孔超低渗储层,成岩作用对储层物性具有重要的影响,主要包括压实作用、胶结作用、交代作用和溶蚀作用,其中压实作用使储层的原始孔隙空间大量损失,胶结作用使部分原生孔隙和次生溶孔遭到破坏,而溶蚀作用是形成次生孔隙、改善储层物性的主要成岩作用类型。子洲气田北部盒8段储层可划分出7种成岩相,其中粒间孔+石英弱加大胶结溶蚀相、晶间孔+岩屑溶蚀相、高岭石+石英加大胶结溶蚀相和杂基微孔溶蚀相为有利成岩相,在有利成岩相中,高岭石+石英加大胶结溶蚀相和晶间孔+岩屑溶蚀相最为发育,是下一步天然气勘探开发的重点成岩相。
The research is based on the collected data including properties,electron microscopy scanning,X-ray diffraction,physical property analysis and mercury porosimeter,the petrologic feature,physical property,pore structure property and diagenesis are discussed.The diagenesis includes compaction,cementation,metasomatism and dissolution.The dissolution is the most important factor to the development of secondary porosity.There are 7diagenetic facies zones with various genetic types in the study area,of which inter-grain pores+weak quartz overgrowth cemented and corroded diagenetic facies,intergranular pores+rock debris corroded diagenetic facies and kaolinite+quartz overgrowth cemented and weak corroded diagenetic facies are the most favorable diagenetic facies.Kaolinite+quartz overgrowth cement and weak corroded diagenetic facies,intergranular pores+rock debris corroded diagenetic facies are favorable diagenetic facies that was mostly developed in the study area,it provides direction for further gas exploration.
出处
《长江大学学报（自科版）（中旬）》
CAS
2013年第7期7-11,161,共5页
Journal of Yangtze University(Nature Science Edition)
基金
国家科技重大专项(2011ZX05005)
关键词
子洲气田北部
盒8段
成岩作用
成岩相
North Zizhou Gasfield
H8 member
dagenesis
dagenetic facies
