Abstract：The attributes of reflection seismic data are closely related to the ultimate goal of oil and gas exploration. The utilization of the oil and gas accumulation-related code concealed in the attributes of reflection seismic data to detect oil and gas is a new technology for oil and gas detection. Where oil and gas occur, there exist local unconventional variations in seismic attributes, and the prospecting for the differences in such variations is a means for oil and gas detection. This means provides the basis for geophysical evaluation of oil and gas traps. The test in the Tarim oilfield shows that the analytical technology for detecting the variations in oil and gas attributes is effective. It is suggested that oil and gas detection and trap evaluation be conducted prior to oil and gas drilling so as to reduce risks and raise the success rate of oil and gas exploration.