Phase states of hydrocarbon are complicated in distribution in Lunnan area. In lateral, the Ordovician oil reservoirs are located in the western part and the gas ones in the eastern part in plane. Analysis result shows that in the western part, the oils from Lunguxi and Tahe Oil Fields and Well LN-1(Lunnan Oil Field) are mostly heavy oil with appreciably low maturity and biodegradation mark and in the eastern part, the oils are light and condensate with relatively high maturity. The oils are moderately to high wax-bearing crude due to mixing in the middle area including Sangtamu faulting belt, Middle platform and Lunnan faulting belt. In longitudinal, distribution of hydrocarbon is obviously different in different areas. In the eastern part, condensate exist in Ordovician and Carboniferous reservoirs and common oil and gas are present in Triassic reservoirs and in the western part, viscous oil is in the Ordovician reservoirs and common oil are in the Triassic reservoirs. It is concluded that the development of Ordovician reservoirs are likely to be controlled with karstification in longitudinal and fracturing in lateral in Lunnan area. Owing to early hydrocarbon accumulation and migration, the hydrocarbons of different states are supplied to these reservoirs during several stages.