Abstract:

The Carboniferous source rocks in the LudongˉWucaiwan area are in zonal distribution and are most highly developed in the west and south parts of the Dinan uplift in the area.The maturity of the source rocks varies greatly from one place to another.The highestmaturity ismainly located along the west part of the Dinan uplift and the northwest of theWucaiwan sag.While towards the south and the north of the area，the maturity presents a tendency ofdecreasing.A comprehensive analysis ofhydrocarbon reservoiring in the area is performed based on the thermal evolution of the source rocks and inclusion temperatures.The results indicate thathydrocarˉbons accumulated in different blocks at a certain sequence.Ranking according to the time of the first phase of accumulation，Wucaiwan is at the top of the list，followed by western Dinan，eastern Dinan，and finally northern Dinan.The distribution of hydrocarbons is controlled by the location and evolution of the source rocks aswell as the reservoiring sequence.

Key words: source rock evolution, reservoiring sequence, Carboniferous, Dinan Uplift, LudongˉWucaiwan area