在对大量薄片分析鉴定的基础上,结合区域构造运动、盆地埋藏史和有机质热演化史,对睡宝盆地古近系储层次生孔隙类型和成因机制进行了研究。分析认为碳酸盐等组分的溶蚀、构造运动以及这两者之间的匹配是次生孔隙形成的主导因素。晚渐新世构造挤压运动导致渐新统地层抬升暴露,酸性大气淡水在表生淋滤阶段溶解岩石颗粒之间方解石胶结物,形成次生溶孔。始新统储层虽然存在有机质热演化过程中产生的酸性流体的溶蚀作用,但是由于有机酸流动受阻,并未形成广泛的次生孔隙。 Based on the analysis and identification of a large number of thin slices, the secondary pore types and genetic mechanism of the Paleogene reservoirs in the Po-Bao basin were studied based on the regional tectonic movement, the burial history of the basin and the thermal evolution history of organic matter. It is considered that the dissolution and tectonic movement of carbonate and other components and the match between the two are the dominant factors in secondary pore formation. The Late Oligocene tectonic extrusion resulted in the uplifting and exposure of the Oligocene strata. Acidic atmospheric freshwater dissolved calcite cement between rock particles at the superficial leaching stage to form secondary dissolved pores. The Eocene reservoirs, despite the dissolution of acidic fluids during thermal evolution of organic matter, do not form extensive secondary pores due to the blocked flow of organic acids.