【摘要】 长2油层沉积期为湖相三角洲平原亚相,经历了强烈的压实和复杂成岩作用;胶结作用是降低孔渗性能的主要因素,方解石类、高岭石、绿泥石、沸石类矿物等成岩矿物的大量析出与次生孔隙发育密切相关;溶解作用使碎屑岩产生粒间溶孔、溶缝、溶蚀填隙物内孔隙和铸模孔等次生孔隙。不同沉积微相形成砂体的孔隙大小及孔隙结构不同,其相应的渗透率也不同。更多还原

【Abstract】 The sedimentary period of Chang 2 reservoir is alacustrine delta plain subfacies,which experiences a strong compaction and complex diagnosis,consolidation is the main course of permeability reduction,the overgrowth of clay minerals,such as carlcareous spar,kaolin,chloride and zeolite is closely related with secondary pore growth,which is created mainly by feldspar,rock fragment and laumontite dissolution.Different pore sizes and pore structures are caused by different sedimentary microfacies,thus different permeabilities are caused.更多还原