用薄片鉴定、扫描电镜等分析手段,对川中-川南过渡带荷包场、界市场地区(简称包界地区)上三叠统须家河组砂岩储层中绿泥石环边胶结物的产状、形成条件及其对储层孔隙的保存机制进行了研究。结果表明,绿泥石环边胶结物以等厚环边方式垂直颗粒表面生长,此类胶结物形成于早成岩阶段,其形成过程主要受沉积环境和物源条件控制;绿泥石环边胶结物的存在提高了岩石的抗压实能力,抑制了石英次生加大,促进了溶蚀作用,形成了有利的孔隙结构。因此,绿泥石环边胶结物对该区致密砂岩储层残余原生孔隙的保存起到了至关重要的作用。 By means of thin-film identification and scanning electron microscopy, the occurrence of chlorite rim cement in the sandstone reservoir of Upper Triassic Xujiahe Formation in the purse field of the Chuanyuan-Chuannan transitional zone and in the boundary market area (referred to as Bajiejie area) , Forming conditions and their preservation mechanism of reservoir pores were studied. The results show that the cements of chlorite rim are grown on the surface of vertical particles with equi-thick ring edge, and these cements are formed in the early diagenetic stage. The formation process is mainly controlled by sedimentary environment and provenance. Chlorite ring edge cementation The existence of matter enhances the ability of rock to resist compaction, restrain quartz secondary growth, promote dissolution and form favorable pore structure. Therefore, the chlorite rim cement plays a crucial role in preserving the residual primary pores of the tight sandstone reservoirs in this area.