辽河坳陷热河台油田砂岩储层物性及分布特征研究

Study on Physical Characteristics and Distribution Characteristics of Sandstone Reservoirs in Rehetai Oilfield,Liaohe Depression

辽河坳陷热河台地区沙三段、沙一段碎屑岩储层为主要的储集层,通过岩心观察、岩石薄片镜下鉴定、岩石扫描电镜分析、常规岩心分析等研究手段对其储层特征进行研究表明,不同沉积背景下的碎屑岩储层物性特征存在明显差异,沙一段储层岩性主要为细砂岩,储层物性较好,为中高孔、中高渗储层,沙三段物性较差,为低孔低渗储层。砂体分布受相带控制,沙一段砂体连续性较好,砂体呈条带状展布,沙三段砂体连续性较差,呈透镜体状、舌状展布特征。通过对储层特征及分布规律的研究对热河油田的勘探开发提供坚实的基础。

The clastic rock reservoirs of the third and first member of Shahetai Formation in the Rehetai area of Liaohe Depression are the main reservoirs.Reservoir characteristics are studied by core observation,thin section microscopic identification,scanning electron microscopic analysis and conventional core analysis.The physical characteristics of clastic reservoirs under different sedimentary backgrounds are obviously different.The lithology of the first member of Shahejie Formation is mainly fine sandstone.Reservoir physical properties are good,medium-high porosity and medium-high permeability reservoirs,and the third member of Shahejie formation is low porosity and low permeability reservoirs.Sand body distribution is controlled by facies zone.Sand body continuity is good in the first member of Shahejie Formation.Sand body distribution is strip-like,and sandbody continuity in the third member of Shahejie Formation is poor.It is lenticular and tongue-shaped.The study of reservoir characteristics and distribution law provides a solid foundation for exploration and development of Rehe Oilfield.