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岩心和铸体薄片分析表明,长岭气田登娄库组为低孔、低渗储层,岩石类型主要为细粒长石岩屑砂岩,砂岩孔隙度在2.7%～6.6%,储集空间以次生孔隙为主,孔隙类型主要为粒间溶孔。影响储层物性的因素主要有岩石结构、沉积环境、成岩作用。沉积环境中分流河道的储层物性相对较好,天然堤和决口扇次之,河道间的储层物性最差。成岩作用中的压实作用、压溶作用和胶结作用对储集层原生孔隙破坏性较大,使储层物性变差;而溶蚀作用可以形成次生孔隙,从而改善储层物性。该区以破坏储层物性的成岩作用为主。
Analysis of cores and castings shows that Denglouku Formation in Changling Gas Field is a low-porosity and low-permeability reservoir with fine-grained feldspathic lithic sandstone with a porosity of 2.7% -6.6% and a reservoir space of Secondary pores are dominant, and pore types are mainly intergranular dissolved pores. The main factors affecting reservoir physical properties are rock structure, sedimentary environment and diagenesis. Reservoir properties of distributary channel in sedimentary environment are relatively good, followed by natural dike and burst mouth, and the reservoir properties among the channels are the worst. Compaction, diagenesis and cementation in diagenesis are more damaging to the primary porosity of the reservoir, resulting in poor reservoir physical properties. However, dissolution can form secondary pores to improve reservoir physical properties. The area is dominated by diagenesis that disrupts reservoir properties.