EFFECT OF PARAMETERS CONTROL ON SPARSE SPIKE IMPEDANCE INVERSION

Sparse spike impedance inversion is a recursive inversion based on the sparse spike deconvolution, and has become one of the most popular methods of acoustic impedance inversion in reservoir prediction. Wide band pass reflection coefficient can be obtained, and the stabilization of the acoustic impedance can be solved correctly through this method. It works well in complex structure, and its quality is controlled by the parameters selected in calculating because of the quality of the seismic data and log. According to the principle of sparse spike impedance inversion, the control effect of iteration time of reflection coefficient and impedance, the main control parameters in object function, such as frequency of wavelet, was studied, and the affection of these parameters to the result was analyzed systematically by modeling and inversion. The methods of parameters setting were pointed out through amounts of real seismic data.