Abstract: The 416a-417 block of Oued Mya basin is located in the middle-northern Algeria. There are only 2D seismic data available now, the exploration degree is relatively low. This paper presents the analysis of source conditions, reservoir-cap rock assemblage, hydrocarbon migration and accumulation model and control factors as well as drilling response, petroleum enrichment and distribution analyses. Integrated with play assessment result, the structural zone in the 416a-417 block is optimized. It is pointed out that HJ-5 and JH-6 structural traps lie in favorable area of source rocks development, which are the targets for petroleum migration with predominant conditions of hydrocarbon accumulation, large sealing area and amplitude. Because of high degree of study and good condition of collocation, this block could be a preferred target for petroleum prospecting in this area.

Key words: OUED Mye basin, 416a-417 block, reservoir model, structural trap, optimal target