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.
沙三段主要为灰色-灰白色含砾砂岩与灰褐色-深灰色泥岩不等厚互层，储层物性较差。
E2S3 is mainly the interbeds of gray-grayish white conglomeratic sandstone and brown-dark gray mudstone in different thickness and with relatively poor reservoir properties.
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