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为给新区开发提供充分的地质依据,通过岩石薄片、扫描电镜、X-射线衍射、铸体薄片、压汞等资料对泌304区储层的岩石学特征、物性特征及微观孔喉结构特征进行了详细研究。研究结果表明,该区储层岩性复杂、岩石成分和结构成熟度低,砂岩储层主要为岩屑砂岩和长石岩屑砂岩,砾岩储层以细砾岩和中砾岩为主,研究区储层母岩类型多样,以变质岩为主,填隙物和重矿物含量高,粘土矿物中蒙脱石含量高;孔隙类型主要发育原生粒间孔和次生粒间溶孔,孔喉组合以中孔-细喉为主,孔喉分选中等;研究区储层物性在纵向上变化较大,属中孔、中-低渗储层,核一段物性好于核二段;影响该区储层物性的因素主要是岩相和成岩作用。
In order to provide sufficient geological basis for the development of new area, the petrological characteristics, physical properties and microscopic pore-throat structural characteristics of the reservoirs in the Seok 304 were studied by means of rock slices, scanning electron microscopy, X-ray diffraction, cast thin slices and mercury intrusion A detailed study. The results show that the reservoirs in this area are complex in lithology, with low rock composition and structural maturity, sandstone reservoirs are mostly lithic sandstone and feldspar lithic sandstone, conglomerate rocks are mainly conglomerate and conglomerate, There are many types of parent rocks in the study area, mainly metamorphic rocks, high content of interstitial and heavy minerals and high content of montmorillonite in clay minerals. The pore types mainly develop primary intergranular pores and secondary intergranular dissolution pores and pores The throat assemblages are dominated by mesopores - small throats, and the pore throats are moderately selected. The physical properties of the reservoirs vary greatly in the longitudinal direction in the study area, belonging to the medium-porosity and medium-low permeability reservoirs. The physical properties of the first nuclear section are better than that of the second nuclear section. The reservoir physical properties of the main factors are lithofacies and diagenesis.