Large scale of evaporite bed exists in Jianghan oilfield, and as many as 82 rhythmites formed by the e-vaporite beds and shales stretch along the ordinate,while there are multiple pressure layers.

• 江汉油田潜江组盐膏层比较发育，盐层在纵向上与泥岩组成的韵律层多达82个，存在多套压力层系，构成了潜江组复合盐膏层。