本文运用多种分析手段，采用新的思维和方法，划分出川东嘉二段孔隙层的绝对孔喉下限、有效孔喉下限、孔隙度绝对下限及孔隙度产出下限。提出孔喉结构的新参数并用之于储层的分类与评价。下限标准符合于生产实际，分类与评价效果良好、实用，已为生产部门所采用 In this paper, using a variety of analytical methods, using new thinking and methods, the lower limit of the absolute pore throat, the lower limit of effective pore throat, the absolute lower limit of porosity and the lower limit of porosity output are obtained. Proposed new parameters of pore throat structure and used in reservoir classification and evaluation. Lower limit of the standard line with the actual production, classification and evaluation of the effect of good, practical, has been used by the production sector