Abstract: This paper briefly describes component characteristics of condensates by using analytical and experimental results from the northern Santai and crude oils from the permian and Jurassic in the same area. The ol/oil correlation, thermal maturation and biodegradation of the condensates were studied. lt is shown that the condensates of this area comefrom the permian source locks are products accompanied with wet gas, some of which are subject to biodegradation.

Key words: condensate, light hydrocarbon, oil/oil correlation, thermal maturation, biodegradation