Abstract: Main type of hydrocarbon accumulation in Wangji area are fault + lithology and faulted nose reservoir.The accumulation and distribution are controlled by many kinds of factors, the controlling factors of different blocks or different sub-area of the same block shows obvious difference.The succession nose construction is advantageous place of oil-gas accumulation;The fault is the main channel for oil-gas migration,which controlled the oil - gas migration and the accumulation;The disposition of sand body and the hydrocarbon source rock controlled oil - gas enrichment;The composite piece-linked reservoir facies has provided the advantageous reservoir space for the oil - gas enrichment.