准噶尔盆地西北缘克—百地区侏罗系储集层特征及主控因素分析  

Characteristics and main controlling factors of the Jurassic reservoir in Ke-Bai area,northwestern margin of Junggar Basin

作　　者：朱世发[1,2] 朱筱敏[1,2] 鲜本忠[1,2] 李德江[3] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)资源与信息学院,北京102249 [3]中国石油勘探开发科学研究院廊坊分院,河北廊坊065007

出　　处：《古地理学报》2009年第6期681-688,共8页Journal of Palaeogeography：Chinese Edition

基　　金：中国石油天然气股份公司重点科技攻关项目"准噶尔盆地西北缘滚动精细勘探"(编号:2005-2009)资助

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。Based on large number of thin-sections and casting thin-section observations, mercury a- nalysis 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 char- acterized by carbonate-cementation, rich in plastic clastic, the sandstones are well sorted and sub-angu- lar, 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 devel- oped. 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 di- vided 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, compac- tion and dissolution. Among them, compaction determines reservoir quality.

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 

分 类 号：P618.130.21[天文地球—矿床学]