Abstract: Oil and gas resources are rich in the middle of Raoyang sag, faults and anticlines developed around main oil generating troughs, and Dongying Formation-upper submember of the fi rst member of Shahejie Formation is the major oil-bearing series in this area. Channel sandbodies deposited by meandering river mainly developed in the Formation. Reservoir forming features are expressed by oil-source faults controlling oil and gas distribution, channel sandbodies controlling traps formation and petroleum enrichment. Structural and lithologic reservoirs co-existed and mutual-complemented. The high location of faults and anticlines is mainly structural reservoir, while the wings are lithologic reservoir with low exploration degree and great potential. Analyzing the confi guration of faults and channel sandbodies, there are three main reservoir forming models in the area, i.e. channel sandbody lapout, fault negative landform channel sandbody updip pinchout, and lenticular isolated sandbody of low-amplitude anticlines. Through fi ne research on structure, deposit and reservoir in recent years, channel sandbody distribution was described, therefore, a series of lithologic traps were conf irmed at the wings of Dawangzhuang-Suning structure, and Well Rao10x and Well Ning75 were drilled successfully. Remarkable exploration achievements were made, which showed a good trend of oil jointing in the middle of Raoyang sag.