Abstract: The 27th region, Jinzhou, belongs to complex fault-block area, it is difficult to build geological model. The use of the normal inversion method which is based on the initial model is difficult to get exact inversion result. The constrained sparse pulse inversion technology is used to extract the wavelet of near-well seismic traces, and synthetic record is generated, the bearing horizon calibrated, wave impedance inversion carried out, and the absolute wave impedance profiles obtained, then they are converted into sand-mudstone profiles. The inversion results are consistent with the drilling results. Thus the average and maximum wave impedance values of different times are extracted along the top of the target layer（T₃^u1） and the sand developed belts are located to predict the reservoir .The results shows that the use of constrained sparse pulse inversion in the complex fault-block area can be used to predict the lithological reservoir and distribution law with relatively high accuracy, which has some guidance significance for the further exploration and development of oilfield.

Key words: the 27th region, Jinzhou, reservoir prediction, constrained sparse pulse inversion, synthetic seismogram, wave impedance