松辽盆地北部深层砂岩成岩作用与孔隙演化

Diagenesis and pore evolution of deep sandstone in north of Songliao Basin

松辽盆地北部深层砂岩成岩作用强,原生孔隙保存差。深层砂岩只有出现大量的次生孔隙,才能具有较好的储集性能。本文通过偏光显微镜、扫描电镜和显微热台等分析方法,研究了松辽盆地深层砂岩岩石类型,成岩作用特征和各成岩阶段砂岩孔隙的演化,表明胶结作用是影响深层砂岩储层物性变差的主要原因,浊沸石胶结物的溶解是深部砂岩储集性能得以改善的主要原因。

The violent diagensis of deep sandstone in north of Songliao Basin made the primary pore in poor preservation. The storage capacity of deep sandstone came with secondary pores. Applied polarization microscope,SEM and temperature heating measure,the type of sandstone,the diagenesis and pore evolution of deep sandstone are thoroughly studied. It is estimeted that cementation destroyed the reservoir property and Laumontite dissolution improved it.