Dongying depression is one of the most prolific hydrocarbon areas in China.The Paleogene stratum consists of underwater fan, littoral-shallow lacustrine and delta facies sandstones.

• 摘要东营凹陷是重要的油气富集区，在古近系地层发育湖相水下扇沉积、滨浅湖沉积和三角洲沉积等砂岩。