金山气田主要气层组储层特征

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、压汞等资料对金山气田储层的岩石学特征、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,砂岩储层主要为含砾不等粒砂岩、中砂质细砂岩和砂质砾岩,砾岩储层以细砾岩和中砾岩为主,储层的母岩类型多,以变质岩为主,填隙物和重矿物含量较高;孔隙类型主要发育原生孔隙,孔喉组合关系以特低孔-细喉为主,孔喉分选差;储层物性纵向上变化大,属特低孔、特低渗储层;影响金山气田储层物性的因素主要是岩石相和成岩作用。

Reservoir Characteristics of Main Gas Reservoirs in Jinshan Gas Field

To provide adequate geological basis for developing a new area, through the rock thin sections, scanning electron microscopy （SEM）, X-ray diffraction, the casting thin sections, pressure mercury and so on, the rock characteristics, physical properties and micro-pore structure characteristics of Jinshan gas field were studied in detail. The research results show that the reservoir lithology of Jinshan gas field is complex, low rock composition and structure maturity are low, sandstone reservoir is mainly pebbled by inequigranular sandstone, fine sandstone and sandy conglomerate in sandy, the conglomerate reservoir is mainly fine conglomerate and glutenite, various types of reservoir rocks in the study area are mainly metamorphic rock, filler content and heavy mineral content are high; The pore types were mainly developed primary and secondary intergranular pores between grains dissolved pores; The pore throat is composed of low size pore and micro-fine throat and poor pore throat sorting; Reservoir physical properties in the longitudinal changes in the study area is larger, belong to extremely low porosity, low permeability reservoir; The factors affecting the reservoir physical properties are mainly rock facies and diagenesis.