Abstract：There are certain relations between seismic wave attenuation and oil-bearing sand，and energy may produce significant attenuation at high frequency when seismic wave passed through the oil-bearing sand. The paper applied the seismic signal energy attenuation technique EAA (Energy Absorption Analysis) and continuously analyzed and calculated attenuation factor at high frequency in seismic profiles. Considering smooth variation of medium background attenuation，the anomalous varying values in attenuation profiles may be associated with oil-bearing formation.The oil一bearing formation in Chang 2 Formation coincides with the position which seismic wave energy has significant attenuation in seismic P-wave attenuation profile SSK-1 passing well of SN oilfield. The other oil-gas anomaly area at the eastern prospective parts of the line were predicted.
