Reservoir Characteristics of 2nd Member of Jialingjiang Formation in Fuchengzhai Structure of East Sichuan
Abstract: Based on the core description, thin sections identification, and physical property data analysis, reservoir char- acteristics of 2nd member of Jialingjiang Formation in Fuchengzhai area, eastern Sichuan, are studied in detail. The results show that the rock types of T1j2 are limestone, dolostone and cream rock, and reservoir rocks are mainly crystal- line dolostone and grain dolostone. The combination analysis of casting thin sections and scanning electron microscopy shows that reservoir space mainly exists in secondary pores (inter-grain pore, intercrystal pore, inter-crystal dissolved pore) and fractures. The mass-properties analysis indicates that the reservoir property of T1j2 is poor, which belongs to fracture-pore and pore-fracture reservoir. Favourable reservoirs are mainly developed in T1j22, less in T1j21, and least in T1j23. Moreover, the reservoirs of T1j2 are mainly controlled by rock types, distributions of sedimentary facies, diagene- sis forms, tectonic actions, and so on, among which bank and tidal flat of dolomite are favourable reservoir facies, dis- solution and dolomization contribute to diagenesis, and microfractures shaped in tectonic activity are conducive to form the high quality reservoir and develop its permeability.
文章引用: 陈守春 , 廖 军 , 廖义沙 , 刘冬玺 , 蒲俊伟 , 刘 菲 , 韩 建 (2013) 川东地区福成寨构造嘉陵江组二段储层特征。 地球科学前沿， 3， 214-220. doi: 10.12677/AG.2013.34030
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