Abstract: Discovery of underproductive oil flow in the Well ZC 10 of Zhoukou depression in the Southern North China basin has brought hope for hydrocarbon exploration success.Direct hydrocarbon/source comparison is conducted with lighter hydrocarbon fingerprint,proving that,this oil flow is of mixed source,primarily the Lower Cretaceous dark mudstone and the Middle and Lower Jurassic coal,dark mudstone and carbargillite.Lighter hydrocarbon comes from the Middle and Lower Jurassic.Accumulation condition is analyzed.