关键词: 成岩作用, 成岩相, 孔隙演化, 储层下限, 储层类型

Abstract: Based on thin-section，clay X-ray diffraction and vitrinite reflectance，diagenetic stage of Liushagang Formation
is determined to be early B to middle B. According to quantitative analysis of diagenetic parameters，eight diagenetic facies
are determined the main diagenesis among which is comparison. different pore evolution exists middle-deep interval，which
is mainly controlled by rock types and diagenetic difference. Formation test and pore-permeability relationship are applied to
draw a conclusion that lower limit of permeability is 5 mD. Empirical formula is used as basic pore evolution model and the
error of porosity prediction is 0.2% to 2.8%. The division of clastic reservoir types is found by porosity，permeability，rock
type，pressure and production capability. The better to best reservoir types are related to delta front underwater channels and
moderate compaction facies. The reservoir property of basin-lake fan is poorer than delta sandbar at the same depth.

Key words: diagenesis, diagenitic facies, porosity evolution, limit of reservoir property, reservoir types