沈84块沙三下(S_3~4)层段储层特征与评价

以取心井的岩石薄片、铸体薄片、扫描电镜、物性、毛管压力曲线等分析资料为基础 ,结合储层物性测井参数解释结果 ,对辽河油田沈 84块沙三下 ( S4 3 )层段储层从岩性组成、成岩作用、物性特征、孔隙类型及孔隙结构、非均质性等方面进行了综合评价 ,认为该储层为一套中 -高孔、中渗储层 ,其物性主要受沉积微相及成岩作用等因素影响 ,具较强的层内、层间和平面非均质性 .综合储层的岩性、物性、成岩后生作用和孔隙结构等特征 ,对沈 84块沙三下层段储层进行了分类 ,将其划分为 I(好 ) ,II(中等 ) ,III(差 ) ,IV(极差 )四大类 ,区内主要发育 II,III类储层 .

The Study and Evaluation of the Reservoir Characteristics of the Lower Sha-3 Segment(S_3~4) in Block Shen0-84, Liaohe Oilfield

The rock composition, diagenesis, physical property,pore type and structure,and heterogeneity of the reservoir in S 4 3 segment are evaluated based on the study of core data, including rock thin slice, casting slice, scan electron microscope, physical property, capillary pressure curve, and logging parameter interpretation results.It is held that the reservoir is of middle-high porosity and middle permeability. The physical property of the reservoir is mainly influenced by sedimentary microfacies and diagenesis. And it has serious intra layer, inter layer and plane heterogeneity. According to the synthetic study of lithologic feature, physical characteristics, diagensis and pore structure, the reservoir is classified into four types, i.e.typeI(good), type Ⅱ(medium),type Ⅲ (bad),type Ⅳ(very bad). The reservoir in this area mainly belongs to type Ⅱ-Ⅲ.