柴达木盆地南翼山浅油藏油砂山组储层岩石学特征

柴达木盆地西部南翼山浅油藏的主要储油层系为新近系上新统下油砂山组上部及上新统上油砂山组下部,为背斜构造控制的岩性层状油藏。通过岩心、薄片、扫描电镜等资料,从宏观和微观两方面对南翼山浅油藏岩石学特征进行详细研究。南翼山浅油藏储层岩性既有碎屑岩又有碳酸盐岩。碎屑岩主要分布于浅湖区,主要发育砂岩及粉砂岩。碳酸盐岩分为5种类型:颗粒灰岩、泥晶灰岩、颗粒云岩、泥晶云岩、藻粘结岩。

Lithology characteristics of Nanyishan shallow oil pool in Qaidam Basin,China

Neogene(Pliocene) reservoirs in the Nanyishan shallow oil pool in Qaidam Basin are distributed from the upper part of Xiayoushashan Formation to the lower part of Shangyoushashan Formation.The oil pool is a lithologic layered oil pool controlled by anticline structure.Lithology characteristics are obtained through analyzing various data such ascore,cast thin section,SEM and so on.There are palaeogene and carbonate reservoir in Nanyishan shallow oil,palaeogene is mainly distributed in the shallow lakes,Including sandstone and siltstone,carbonate can be divided into 5 types: grain limestone,micrites,grain dolostone,politic micrite,algae bonding rocks.