The Xujiahe Formation in Baimiao area in the middle part of Sichuan Basin has frequent oil and gas shows in drilling and it indicates tremendous exploration potential. It is important to develop the study of oil-gas detection in the Second Member and the Forth Member of Xujiahe Formation. According to the fluvial detection flow in two-phase medium, the oil-gas detection has been realized on 29 two-dimensional seismic profiles in the total thickness of 890 km of the Second Member and the Forth Member of Xujiahe Formation in the study area.