哈密拗陷中生界砂岩孔隙结构特征初探

A Study on the Characteristics of Pore Texture of Mesozoic Sandstone in Hami Depression

通过砂岩铸体薄片、扫描电镜观察、毛细管压力数据及物性参数等资料，对哈密拗陷中生界砂岩储层的孔隙结构特征进行了初步研究。划分出了粒间孔隙、溶蚀孔隙、填隙物内孔隙及裂缝等４种主要孔隙类型，对砂岩孔隙结构特征进行了评价。分析了影响本区中生界砂岩储层孔隙结构的地质因素，为下一步的油气勘探提供了必要的地质基础和理论依据。

The pore texture of the sandstone reservoir of mesozoic in Hami depression is studied basedon optical examination of casting thin sections,SEM,parameter of capillary pressure and petrophysi-cal properties.It is suggested that pores of the sandstone of mesozoic in Hami depression be classifiedinto four types:intergranuler pores,dissohtion pores ,intra-matrix pores and fracture pores. More-over evaluation on the characteristics of the pore texture is given. Geological factors of influence onthe sandstone of niesozoic in this area are finally analyzed,providing comprehensive understanding andessential geology groundwork for ftitLire prospection.