鲁西南莱芜地区下古生界碳酸盐岩储集性能初步探讨

笔者对莱芜地区下古生界碳酸盐岩作了岩石薄片鉴定、铸体薄片观察、压汞法孔隙结构分析、煤油饱和法孔隙度测定及气体渗透率测定。根据这些分析资料,对下古生界碳酸盐岩的储集性能进行了探讨,现简述如下。 

THE BEHAVIOR OF LOWER PALEOZOIC CAR-BONATE RESERVOIR IN LAIWU AREA SOUTHWESTERN SHANDONG

The behavior of Paleozoic carbonate reservoir in Laiwu area is roughly known by pore geometry analysis,thin section cast observation and conventional petro-physical properties determination.There are more than 20 layers with thickness of 150m are favourable reservoir in this section.The types of the reservoir are:for Middle Cambrian,mainly dissolution vug type;for Ordovician,mainly fracture-dissolution vug type.There are 12 types of pore space:dissolution pore;intercrystalline pore;intercrystalline dissolution pore;intracrystalline dissolution pore;intergranular dissolution pore;intragranular dissolution pore;dolomite casting mould pore;structural fracture;interformational fracture;diagenetic fraccture;dissolution trace,stylolite etc.Secondary pore zones with developed dissolution pore,cavern,and crack were often formed near paleoerosional surfaces.There sre 6 secondary pore zones in this section.