Abstract: Tongyu fault depression is located in the sestern slope of Songliao basin,based on the study of regional stratigraphic development characteristics,t is believed that the Upper Paleozoic in the western slope of Songliao basin has a good prospect for oil and gas exploration.But the hydrocarbon of stratigraphic strata in the upper Paleozoic is unclear.In this study,stratigraphic physical specimens of the western slope of Songliao basin area are systematically collected and density,magnetization and resistivity are tested.The petrophysical parameters of the strata in Tongyu fault area are systematically analyzed,based on an analysis of the physical characteristics of rock strata and taking advantage of the gravity,magnetic survey and electrical method,the comprehensive interpretation is done and the distribution and tectonic framework of the upper Paleozoic and tectonic framework are discussed.The above study results provide the basis for evaluation of the oil and gas resource potential．

Key words: Tongyu fault depression,Comprehensive interpretation,Upper Paleozoic,Tectonic evolution,Resource evaluation