摘要
羌塘盆地侏罗系地层厚度大 ,分布面积广 ,砂岩储层发育 ,但砂岩储集物性及孔隙结构普遍较差 ,现有露头样品分析表明 ,其储层主要为低特低渗储层。侏罗系低渗砂岩储层特征主要受沉积相带与压实、胶结等成岩作用的控制。依据其储层的控制因素 ,将其划分为强压实型、中等压实碳酸盐胶结型、强压溶石英次生加大型、泥质包壳粘土矿物胶结型、沥青充填型、不稳定组分溶解溶蚀型 6种低特低渗砂岩储集层类型 ,这些类型各具不同的储集潜力和分布范围。其中 ,发育于三角洲前缘等相带中的不稳定组分溶解、溶蚀型低渗砂岩储层储集性能较好 ,为羌塘盆地最有利的碎屑岩储层。
Jurassic reservoir sand body is widely developed in Qiangtang basin. The porosity, permeability and pore structure of sandstone are all worse. The analysis on available outcrop's samples reveals that the sand body mainly belongs to low-permeability reservoir. By comprehensive analyses and investigations, the low-permeability sandstone reservoirs in Jurassic are classified into six types based on their origin. Reservoir potential varies with the different reservoir types. Dissolved sandstone reservoirs with unstable components are the favorable good-quality sandstone reservoirs in Jurassic of Qiangtang Basin.
出处
《石油大学学报（自然科学版）》
CSCD
北大核心
2001年第5期6-10,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
中国石油天然气集团公司"九五"科技工程项目 ( 970 2 0 4-0 4-0 2 )
关键词
羌塘盆地
侏罗系
砂岩储层
成岩作用
储层分类
储层预测
油气藏
Qiangtang basin
Jurassic
sandstone reservoirs
diagenesis
reservoir classification
reservoir prediction
