Abstract: Through basic geological data and some study about hydrocarbon resources in the project of strategic research, the oil & gas resources and its distribution in Tibet are analyzed, and it is put forward that the prospective reserve of oil is about 121.26×10⁸t, geologic reserve of oil is about 69.61×10⁸t, recoverable reserve of oil is about 14.00×10⁸t. Some methods of 2D seismic exploration are set especially for Qinghai-Tibet Plateau. Physical column of stratigraphic is set and analyzed. Three obvious geological interfaces are identified and some important structural layers are outlined. Through geological investigation, gravity-magnetic measuring and some other methods, it is thought that Qiangtang basin has good potentiality of giant oil&gas field, and some other marine basins also have good exploration expectation, besides, Lunpola oil-bearing basin group and Hoh Xil oil-bearing basin group have as well.