The relations between hydrocarbon extraction contents in reservoir rock and electrical-logging parameters, such as microspheric-logging parameter, and the relations between hydrocarbon extraction contents in reservoir rock and oil saturation in reservoir determined in laboratory were discussed in detail in this paper. The relation between individual-well daily crude production rate and individual-well hydrocarbon contents (equal to hydro- carbon extraction contents in reservoir rock X effective thickness of production layers) is also analyzed. The reservoir rock sample and reservoir geological and engineering information are obtained from two main production layers, Putaohua and Heidimiao, in the Xinzhan Oilfield, Songliao Basin. The result shows that the hydrocarbon extraction contents in the reservoir rock may reflect hydrocarbon saturation of production layers.On the bassis of the distribution characteristics of hydrocarbon extraction saturation and the reservoir properties, such as porosity, of reservoir in the oil, water and dry layers, a geochemical plot or geochemical standard to distinguish the oil, water and dry layers was worked out to explain the oil-bearing of different layers. The results were compared with well-logging explanation results and confirmed by the well testing results, and it can be concluded that the results from the geochemical distinction are more reliable than those of well-logging explanation.The geochemical characteristics of oil, water and dry layers are summarized. The geochemical plots to distinguish the oil, water and dry layers between the Putaohua and Heidimiao production layers are obviously different. This result shows that the geochemical plots or standards to distinguish the oil, water and dry layers put out in this paper are localized like other methods to distinguish the oil, water and dry layers, such as well-logging or electrical-logging. In different regions or different layers in a specific region, the geochemical plots or geochemical standards are different.