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从储层的岩性、孔隙类型及影响孔隙结构的因素等方面,对马岭油田北三区延10储层的孔隙结构特征进行了分析,揭示了该储层的微观特征,为北三区进一步油气勘探和开发提供了详细的理论依据。研究结果表明,该储层主要为长石石英岩屑质砂岩,结构成熟度低。孔隙类型以粒间溶孔为主,剩余粒间孔及粒内溶孔次之,含少量原生粒间孔及铸模孔。孔隙结构主要以中孔中细喉型和中小孔细喉型为主。压实作用、岩石粒度及泥质含量是影响研究区储层孔隙结构的主要因素,而粒度大小、泥质含量受沉积相控制,因此必须加强研究区沉积微相的研究。
The pore structure characteristics of Yan 10 reservoir in Beisan area of Maling oilfield are analyzed from the aspects of reservoir lithology, pore types and the factors affecting pore structure. The micro-features of this reservoir are revealed. Exploration and development provide a detailed theoretical basis. The results show that the reservoir is mainly feldspar-quartzite sandstone with low maturity. The type of pores is dominated by intergranular dissolved pores, followed by the remaining intergranular pores and intragranular dissolved pores, with a few primary intergranular pores and mold pores. Pore structure is mainly mesoporous thin throat and small holes in the throat-based. Compaction, rock size and shale content are the main factors affecting the pore structure of reservoirs in the study area. While the grain size and shale content are controlled by sedimentary facies, it is necessary to study the sedimentary microfacies in the study area.