The main reservoir space in oolitic beach is the corrosion cavern formed by the corrosion action of atmospheric fresh water, organic acid and sulphuric acid.

• 川东北飞仙关组鲕滩储层的主要储集空间为溶蚀孔洞,主要由大气淡水溶蚀作用、有机酸溶蚀作用和硫酸溶蚀作用所形成。