Abstract：The study of meshwork-carpet-like oil-gas-reservoir forming system has achieved significant effects in Zhanhua sag exploration. Using the studied results of meshwork-carpet-like oil-gas-reservoir forming system in Zhanhua sag, the paper studied the structural feature of meshwork-carpet-like oil-gas-reservoir forming system in Dongying sag and divided major storage layers. Through the analysis of compositional structures and sedimentary feature of upper meshwork layers, carper-like layers and lower meshwork layers,the oil-gas accumulation regularity in middle and shallow layers of Dongying sag has been further clarified, which pointed out the direction for the exploration and development in Dongying sag.
