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针对济阳拗陷下第三系砂岩次生孔隙具有储集岩体类型多、分布层位广和次生孔隙种类丰富的特点 ,利用铸体薄片及地球化学方法 ,分析了次生孔隙发育的基本条件。结果表明 ,控制砂岩次生孔隙发育的主要因素包括 :1处于不同沉积相带的砂岩体 ,次生孔隙发育程度不同 ;2成岩作用强度不同 ,次生孔隙发育程度不同 ;3断裂作用起到输送酸性介质通道的特殊作用 ,并使次生孔隙的形成得到改善 ;4高地温能加快有机质的成熟 ,从而有利于次生孔隙在较浅的深度形成。认为砂岩中的各类易溶物质以及成熟烃源岩中含有丰富的有机质 ,为次生孔隙的形成提供了基本的物质条件。
The secondary pores of the Tertiary sandstones in Jiyang depression are characterized by many types of reservoir rocks, wide distribution layers and abundant secondary pores. By means of the thin slab and geochemical methods, the secondary porosity of the sandstone Basic conditions. The results show that the main factors controlling sandstone secondary porosity development are as follows: 1 Sandstone bodies in different sedimentary facies have different degrees of secondary porosity development; 2 diagenesis intensity is different and degree of secondary porosity is different; Acidic channels play a special role and lead to the formation of secondary pores. 4 High geothermal energy can accelerate the maturation of organic matter and facilitate the formation of secondary pores at shallow depths. It is considered that all kinds of soluble materials in sandstone and mature source rocks are rich in organic matter, which provides the basic material conditions for the formation of secondary pores.