Abstract: Based on data of seismic and drilling work done in the Dongming-Puyang depression, the subject is dealt with in the following respects: 1. geological characteristics and zonal distribution of oil and gas pools in the Dong-Pu depression; 2. analysis of the structural and subtle pattern of traps discovered in the depression in the light of their origin, morphological features and the source-reservoir-capping conditions, as well as their relationship with hydrocarbon accumulation; 3. the role of faulting in the control of oil and gas accumulation; and 4. types of reservoir and cap rock combination and disposition of fault blocks, and their significance to the entrapment and accumulation of hydroearhons.