Abstract: Beimazhuang-Heilongmiao area, located in the southern fault overlap zone in Nanyang depression, developed Beimazhuang and Heilongmiao subaqueous alluvial cones under the control of palaeostructure and palaeogeography. It was a nose-like structural setting and near oil generation center. The well-developed faults provided favorable reservoir conditions for hydrocarbon accumulation. It is a typical low porosity and low permeability reservoir with poor physical properties and deep burial depth (2,400-3,200m). Detailed studies on sandbody distribution, reservoir features, oil-bearing properties and structural features have deepened understanding of the geological patterns and formed a solid basis for further exploration potential tapping.