摘要
利用岩芯、铸体薄片、录井等资料对储层的微观特征研究表明,有利储层岩性主要为白云岩类和颗粒岩类,储层储集空间主要为次生孔隙和裂缝,孔隙度均值为3.11%,渗透率均值为0.9×10-3um2,表现出低孔、低渗及非均质性强的特征,为裂缝-孔隙型储层,并与沉积环境密切相关。嘉陵江组白云岩储层主要发育于云质泻湖及潮间藻云坪沉积环境;颗粒灰(云)岩储层主要发育于高能环境浅滩相。白云化作用及溶蚀作用则控制着储层孔隙的发育程度,裂缝极大地改善了储层渗透性。
Study of core, casting thin sections, logging data indicate that favorable reservoir lithology of the Jialingjiang Formation is mainly dolomite and sandstone with secondary pore and crack and mean porosity of 3.11% and an average penetration rate of 0.9x 10-3um2. The main control factors of development of the reservoir are closely related to depositional environment and dolomite reservoir was mainly developed in dolomitic lagoon and intertidal algae cloud floor depositional environment. The particle ash （cloud） rock reservoirs were developed in a high energy environment of shoal facies. Dolomitization and dissolution were in control of the development of the reservoir porosity.
出处
《四川地质学报》
2014年第3期345-349,共5页
Acta Geologica Sichuan
关键词
嘉陵江组
储层
控制因素
蜀南
south Sichuan
Jialingjiang Formation
reservoir
control factors
