Abstract: Acoustic curves are the basic data essential for the wave-impedance inversion based on the logging restraint. But
the acoustic data obtained from practical work usually cannot well reflect the changing rules of subsurface lithology based on
the logging curve reconstructive method. The paper presents a multi-curve sonic reconstructive technique that can truly reflect
the character of reservoir. The method can both keep the time-depth relation of sonic curve and all frequency information
to be unchanged，and also fully use the characteristic information of reconstructive curve participated since the method uses
natural gamma，natural potential，compensated neutron and resistivity curves（after normalization correction）to participate in
reconstruction while keeping the property of sonic curve. The method achieved good results after carrying out wave impedance
inversion and prediction of reservoir in the case of D region，which showed that the method is simple，practical and effective
curve reconstructive technique.

Key words: curve recomposition, relativity analysis, information integration, reservoirs prediction, wave impedance inversion, logging restraint