Abstract: The Fuyu Oilfield, the first oilfield discovered in Fuxin Uplift, has been developed for 50 years, and the exploration degree is relatively higher. In recent years, more and more exploration results are obtained, with the analysis of reservoir-forming conditions of lithologic reservoirs and the application of reservoir lithology identification and modification technologies in the region. Paleouplifts developed in the Fuxin uplift zone, and "crescent-shaped" fluvial sand bodies are overlaid by a large scale, and "oilrich sags" are distributed in the surrounding areas of the paleouplifts. So the Fuxin uplift zone has favorable conditions for the formation of super large lithology reservoirs. New oil reservoirs are discovered increasingly in the surrounding areas of the old oilfields of Fuyu and Xinli, based on the full application of the 3-D seismic reservoir prediction technology and the sedimentary microfacies technology aswell as the large-scale fracturing and horizontal well technology. New layers including the Yangdachengzi layer are revealed gradually below the Fuyu Oilfield, with reserves exceeding 100 million tons.

Key words: Fuxin Uplift, reservoir-forming conditions, Fuyan oil layer, exploration potential, exploration in old oil regions