摘要
鄂尔多斯盆地北部塔巴庙地区上古生界发育一套低孔低渗致密砂岩储层 ,储集空间以溶蚀微孔、蜂窝状溶孔和高岭石晶间隙为主 ,孔喉以细—微细为主。成岩作用决定了砂岩内部储集空间特征和储集性能 ,主要表现在较强的压实作用和胶结作用使砂岩的原生孔隙很少得到保存 ;较弱的溶蚀作用和强的蚀变作用使砂岩储集空间以微孔、超微孔为主 ,具有孔径小喉道细的特征 ,这是砂岩储集物性特别是渗透率偏低的直接原因。
The reservoirs in the upper Paleozoic in Tabamiao area of north Ordos Basin are characterized by low porosity and low permeability. The storage space is dominatecd by the solution micropores, the honeycomb-like solution pores and the kaolinitic intercrystalline pores with small to very small pore throat. The diagenesis controls the characteristics of storage space of sandstone and reservoir quality, which characterized by seldom preserved primary pores due to strong compaction and cementation and by dominant micro-pores,small pore radius and fine throat due to strong alternation and weak soution.This is the direct reason of for the anfavourable reservoir property of sandstone, especially lower permeability.
出处
《矿物岩石》
CAS
CSCD
北大核心
2003年第3期92-96,共5页
Mineralogy and Petrology
