Abstract:Success rate and exploration benefit of turbidity prediction decreased in recent years, the main factor of which is the effects of carbonate. Starting with the characteristics of lithologic association, amplitude, vector and impedance, the carbonate geophysical response is studied deeply in Dongji sag of Dongying sag, and the recognition method of turbidity in carbonate background is proposed.The wavelet reconstruction, using wavelet decomposition by choosing the right wavelet, could remove the carbonate background and enhance the resolution. The ration of amplitude to frequency, which was calculated by attributes synthesis based on amplitude and frequency, is able to suppress the carbonate energy and strengthen the boundary information of turbidity. The ration of compressional wave velocity to shear wave velocity, which is calculated by pre-stack inversion technique, can also weaken the carbonate energy and beneficial to study the turbidity scale and the relationship with adjacent area.