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传统观点认为，沾化地区沙二段应为沙二上亚段，全区缺失沙二下亚段。
Traditional standpoint is that upper Es2 submember was reserved and lower Es2 submember were lost in Zhanhua Area.
沙二段岩性主要为灰色中细砂岩与深灰色泥岩不等厚互层，储层物性较好。
E2S2 is mainly the interbeds of gray medium-fine sandstone and dark gray mudstone in different thickness and with good reservoir properties.
辽河盆地东部凹陷中段深部地层中的古近系沙河街组由沙一段、沙三段构成，缺失沙二段和沙四段。
The Shahejie Formation of the Paleogene in the deep zone of the middle area of the East Depression in Liaohe Basin is made up of its Member 1 and Member 3 and lacks its Member 2 and Member 4.
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