【摘要】 根据铸体薄片、物性、岩性、孔隙结构和测井分析及化验资料,对鄂尔多斯盆地靖边气田盒8段储层特征进行了研究。结果表明,该套储层砂岩主要由石英砂岩、岩屑石英砂岩和岩屑砂岩等三类岩石构成,储集空间以剩余原生粒间孔、粒间溶孔为主。储层物性较差,裂缝对渗透率的影响不大。排驱压力不高,中值压力较高,最大孔喉半径和中值孔喉半径都很小,且分选性较差,歪度细。溶蚀作用改善储层的孔渗效果不佳,孔隙结构参数总体上较差。储层物性受沉积微相和成岩作用的影响,利用储层物性和孔隙结构参数,将盒8段储层分为四类,其中Ⅱ类储层为该区的主力储层。更多还原

【Abstract】 The characteristics of He 8 sandstone reservoir in Jingbian Gas Field of Ordes Basin were investigated by the data of core analysis, logging, porosity and mercury injection. The sand-body of the reservoir was composed by quartz sandstone, lithic-quartz sandstone and lithic sandstone. The pore space of reservoir mainly includes the primary residual inter-granular pores and inter-granular dissolved pores. The micro-fractures and dissolution only limitedly improve the petrophysical property of reservoir and the connectivity of pore throat of He 8 sandstone reservoir with low permeability and porosity. Ejecting pressure is low and the median pressure is high. The maximum radius of core throat and median radius of the core throat is small and the sorting is worse and skewness is fine. The quality of reservoir was influenced by sedimentary micro-facies and diagenesis. According to the petrophysical properties of reservoir and pore structure parameters, He 8 sandstone reservoir was classified into four types. The type Ⅱ reservoirs are major reservoirs.更多还原