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发育于泉头组三、四段的扶余油层和杨大城子油层是松辽盆地的主力油层之一,该油层低孔特低渗的物性特征制约了扶杨油层的勘探开发。为了研究松辽盆地北部泉三、四段储层物性的影响因素和低渗透储层的成因,本文以12 062组实测孔隙度和渗透率数据为基础,讨论了泉三、四段的物性影响因素。结果表明,总体上影响泉三、四段储层物性的主要因素是成岩作用,其次是沉积作用。泉三、四段储层成分成熟度低、粒度细、泥质含量高、成岩作用强是渗透率低的根本原因。但在不同成岩阶段,沉积相和成岩作用对储层物性的影响不同,在早成岩阶段储层物性主要受沉积相的影响,在中成岩阶段A,亚期以后储层物性主要受成岩作用影响,在中成岩阶段A_1亚期储层物性受二者的影响程度相近。处于不同成岩阶段、发育于不同沉积相的砂体,可形成各种类型的储层。
The Fuyu oil layer and Yang Dachengzi oil layer, developed in the third and fourth sections of Quantou Formation, are one of the main oil reservoirs in the Songliao Basin. The physical properties of the low porosity and ultra-low permeability of the reservoir restrict the exploration and development of the Fuyang oil layer. In order to study the influencing factors of reservoir physical properties and the genesis of low permeability reservoirs in Quaternary and Quaternary of Songliao Basin, based on the measured porosity and permeability data of 12 062 groups, the physical properties of Quaternary and Quaternary factor. The results show that the main factors affecting the physical properties of the third and fourth member of Quanquan are diagenesis, followed by sedimentation. The third and fourth members of the reservoir have low permeability, low maturity, fine grain size, high shale content and strong diagenesis. However, in different diagenetic stages, the sedimentary facies and diagenesis have different effects on reservoir physical properties. The reservoir physical properties are mainly influenced by sedimentary facies in the early diagenetic stage. After the middle diagenetic stage, the reservoir physical properties are mainly affected by diagenesis During the middle diagenetic stage, the reservoir properties of A_1 sub-period are affected by both. In different diagenetic stages, sand bodies developed in different sedimentary facies can form various types of reservoirs.