Abstract: Based on large number of thin-sections and casting thin-section observations， mercury analysis and core observations，the Jurassic reservoir characteristics of Ke-Bai area in northwestern margin of Junggar Basin have been systematically studied. The lithology characteristics of the Jurassic reservoir are that near the provenance， composition maturity is low， less pore-filling contents， the cementation is characterized by carbonate-cementation，rich in plastic clastic， the sandstones are well sorted and sub-angular，textural maturity is moderate. As the burial depth of Jurassic reservoir is shallower， diagenesis is simple.Storage space is characterized by primary pores. Influenced by faults， secondary pore is well developed. Compared to sandstone， conglomerate has more intragranular dissolution pores.The characteristics of pore texture are controlled by the lithology characteristics of reservoir.Pore texture of reservoir can be divided into three types: well sorted and bold skewness， better sorted and slightly fine skewness，moderate sorted and fine skewness.The main controlling factors of the Jurassic reservoir include grain size， compaction and dissolution. Among them， compaction determines reservoir quality.

Key words: Junggar Basin, Jurassic, reservoir characteristic, reservoir quality, main controlling factors

摘要： 利用大量岩石薄片、铸体薄片、压汞数据及岩心观察等资料，对准噶尔盆地西北缘克—百地区侏罗系储集层特征进行了系统研究。侏罗系储集层的岩石学特征为：近物源、成分成熟度低、填隙物含量少、胶结物以碳酸盐为主、富含塑性易变形岩屑、分选中—好、磨圆次棱角状、结构成熟度中—好。储集层埋深浅，成岩作用简单，孔隙类型以原生孔隙为主，受断裂影响次生溶蚀现象普遍发育。与砂岩相比，砾岩粒内溶孔发育。研究区储集层孔隙结构受控于储集层岩石学特征，可划分为分选较好粗歪度、分选较好较细歪度和分选中等细歪度3类孔隙结构。岩石粒度、压实作用和溶蚀作用是储集层物性的主要控制因素。其中，压实作用决定储集层质量。

关键词: 准噶尔盆地, 侏罗系, 储集层特征, 储集层质量, 主控因素

CLC Number: 

• P618.130.2＋1