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辽河坳陷冷东油田原油分析显示：富4-甲基甾烷、贫γ-蜡烷的原油（A类）主要分布于陈家洼陷内；贫4-甲基甾烷、富γ-蜡烷的原油（B类）主要分布于冷东断裂带中南部和雷家地区；具有中等含量4-甲基甾烷和γ-蜡烷的原油（C类）分布于冷东断裂带中北部。A类和B类原油分别源于本区沙三段和沙四段优质油源岩。C类原油的特征反映它是A、B两类原油的混合，它在储集层空间格局上的变化，显示原油成藏过程中后期原油（A类）灌注油藏的方向以及对早期原油（B类）的驱替与混合作用。
Analysis of crude oil from Cold East Oilfield in Liaohe Depression shows that the crude oil (Type A) rich in 4-methylstest and γ-poor alkanes is mainly distributed in the Chenjia Sag; lean 4-methylstest, γ-rich Crude oil (type B) of alkanes is mainly distributed in the southern part of Lengdong fault zone and Leijia area. Crude oil (C type) with medium content of 4-methylstein and gamma-alkane is distributed in the north of the cold-east fault zone. Class A and B crude oils originate from high-quality oil source rocks of Es3 and Es4 respectively in this area. The characteristics of Class C crude oil indicate that it is a mixture of A and B crude oils. Its variation in the spatial pattern of the reservoirs shows the orientation of the late-stage crude oil (Type A) B type) displacement and mixing effect.