Carbonate cements are the most abundant authigenic minerals in the Palaeogene sandstones in Xihu Sag,which is one of the main petroliferous sags in shelf basin of East Sea.

• 西湖凹陷是东海陆架盆地中主要的含油气凹陷之一,该区域最重要的自生矿物是碳酸盐胶结物,对储层的影响至关重要,其主要类型为方解石、铁白云石和菱铁矿。