Abstract: Based on the massive geochemical data obtained from the national multi-target land survey, taking the deep-soil samples from Songnen Plain as the research object, the anomaly characteristics of halogen elements, total carbon (TC) and CaO, combined with the geological features, are used to predict the oil-as reservoirs in Songnen Plain. A total of 3 prospective areas are delineated, among which YQ-1 is located on the east of Daqing Oilfield, with great potential of oil-gas reservoir, YQ-2 and YQ-3 with the potential for further discovery of reservoir.