The lithologic oil reservoir of ES, in Luojia area in Zhanhua sag is formed by underwater alluvial fan andturbidite fan sandbody. It is a new oil-bearing series that has just found in recent years in this area. Thedistribution and accumulation of oil and gas are complex because of the varied thickness of sandbody andcomplex structures. The sedimentary factes-control factor of oil reservoir and accumulation conditions arestudied and the distribution rule of oil and gas in ES3 in this area is summarized according to the researchon structure and reservoir, analysis of seismic factes and sandbody trace technique, it has gotten someachievements and experiences in the progressive exploration and development. It is thought that the oilsource is full, properties of reservoir and cap rock are favorable, and conditions of migration, trap,accumulation are good. It is the main exploration area in the short term, and it is also main target anddirection in the future. The lithologic oil reservoir of ES, in Luojia area in Zhanhua sag is formed by underwater alluvial fan andturbidite fan sandbody. It is a new oil-bearing series that has just found in recent years in this area. Thedistribution and accumulation of oil and gas are complex because of the varied thickness of sandbody and complex structures. The sedimentary factes-control factor of oil reservoir and accumulation conditions are constructed and the distribution rule of oil and gas in ES3 in this area is based on the research of structure and reservoir, analysis of seismic factes and sandbody trace technique, it has gotten someachievements and experiences in the progressive exploration and development. It is thought that the oilsource is full, properties of reservoir and cap rock are favorable, and conditions of migration, trap, accumulation are good. It is the main exploration area in the short term, and it is also main target and direction in the future.