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四川盆地上震旦统灯影组是世界上最老的储集层之一[1],通过检索文献、观测剖面及岩心、整理资料等工作,研究了川西灯影组储层特征及其孔洞充填序列,得出以下结论 :1.灯影组储层岩石类型主要为各种含藻白云岩,多种储集空间发育,溶蚀孔洞和构造裂缝是形成较好储层的必要条件;2.根据储集空间类型的不同,孔隙充填序列大致分为两种。孔隙型白云岩的充填序列为:第一世代纤(柱)状白云石,第二世代粒状白云石,第三世代自形自形粗晶白云石。而受热液的改造的孔洞白云岩,充填序列为:早期白云石-沥青充填-鞍状白云石-自生石英。
The Upper Sinian Dengying Formation in the Sichuan Basin is one of the oldest reservoirs in the world [1]. Through the literature search, observation of sections and cores, and the collation of data, the characteristics of the Yingxiu Formation in western Sichuan and its filling sequence , The following conclusions are drawn: 1. The rock types of Dengying Formation are mainly algal dolomites with various kinds of reservoir space, and the dissolution holes and tectonic fractures are the necessary conditions for forming better reservoirs. 2. According to the reservoir Different types of space, pore filling sequence can be divided into two types. Porous dolomite filling sequence: the first generation of fiber (columnar) dolomite, the second generation of granular dolomite, the third generation of self-shaped coarse-grained dolomite. The hydrothermally modified pores dolomite, filling sequence: early dolomite - bitumen filling - saddle dolomite - authigenic quartz.