松辽盆地西部斜坡油砂资源丰富,其形成与松辽盆地的形成、构造演化、地层沉积以及油气聚集都有密切关系。本文利用钻井、岩石薄片、物性测试数据等资料,对该区储层岩石学与沉积学、孔渗等特征进行了深入分析。结果表明,西部斜坡油砂储层主要分为2种类型：分别为三角洲前缘水下分流河道高孔高渗储层和河口坝高孔中渗储层。该区储层岩性主要为细粒岩屑砂岩,储层孔隙类型以原生粒间孔为主,储层岩石具有成分成熟度偏低、结构成熟度中等的特点。其主要受沉积相带、断层和成岩作用的影响。沉积相带和成岩作用起决定性作用,而断层只在局部起控制作用。

There are abundant oil sand resources in the Western slope of Songliao Casin, and their formation has a close relationship with the geology, the structure and the oil-gas accumulation in this area. In this paper,we analyzes the lithological and sedimentary characteristics, the porosity and the permeability of the oil sand reservoirs by drilling, taking rock slices, using the materials test data and other information,and it is shown that the oil sand reservoirs in this place can be divided into two types: the high porosity and high permeability reservoirs of underwater distributary channels and the high porosity and medium permeability reservoirs of mouth bars on the delta front. The lithology of the reservoirs is mainly of fine-grained lithic sandstone and the pores of the reservoirs are mainly of the type of intergranuiar pores of primary porosity. Reservoirs have low compositional maturity and medium textual maturity. The main influencing factors of the reservoirs include the sedimentary facies, the diagenesis and the fault, in which the sedimentary facies and the diagenesis play a decisive role and the fault plays a role in some areas.