Abstract: Electron microscopic study reveals that the Tertiary sandstones in the South Sea region are of different types of porosity: intercrystalline porosity for Jiaowei formation of Neogene,lying in the diagenetic zone; and intercrystalline-seeondary combination porosity for Weizhou formation of Paleogene,lying in the weak deuterogenie zone.The Liushagang formation of Paleogene is primarily of the secondary porosity type,lying in the mediumstrong deuterogenic zone.

摘要： 根据电镜研究表明,南海地区第三系砂岩从新到老孔隙类型不同,上第三系角尾组为粒间孔隙,处于成岩作用带,下第三系涠洲组为粒间孔隙和次生孔隙混合,处于弱后生作用带.下第三系流沙港组则以次生孔隙为主,处于中、强后生作用带.

关键词: 次生孔隙, 下第三系, 南海地区, 电镜研究, 粒间孔隙, 砂岩储集层, 第三系砂岩, 流沙港组, 成岩作用, 上第三系