彰武断陷沙海组碎屑岩储层成岩作用及对储层物性的影响

彰武断陷沙海组储层主要为一套扇三角洲平原亚相沉积。通过岩心观察与鉴定，确定了储集层岩性主要为含砾砂岩。通过铸体薄片、扫描电镜以及物性等资料，确定沙海组成岩作用类型包括压实压溶作用、胶结作用和溶蚀溶解作用，孔隙类型包括原生粒间孔隙、填隙物内孔隙、裂缝孔隙、溶蚀粒间孔隙和溶蚀粒内孔隙。T_max主要分布在435℃～455℃，处于中成岩阶段A期。沙海组纵向上在 920.9～930.55 m、935.8～938.9 m、944.35～951.07 m存在3个孔渗发育带，主要受岩石类型和成岩作用(溶蚀溶解作用)控制。

Diagenesis of clastic rock reservoirs and its influence to reservoir physical property in Shahai Formation,Zhangwu depression

The reservoir of Shahai Formation in Zhangwu depression is subphase deposition of fan delta plain. Through core observation and identification,the rocks of reservoirs are mainly pebbled sandstone.On the basis of the data of casting lamella,scan electron microscope and reservoir physical property,the authors confirm the diagenesis of Shahai Formation include compaction and pressure solution,cementation and erosion-dissolution in type. The pores include primary intergranular filling,fractural,dissolution inte...