Abstract: Reservoir quantitative prediction is the key technology of lithologic reservoir prospecting,and seismic inversion is the most important core technique of it.For it,thin layer differentiation,lithologic character recognition and reservoir identification are the most difficult problems.Quasi-acoustilogging-restrained seismic inversion technology is using the reservoir geophysical characters to construct acoustic waves from other logging curves in order to inverse the parameters of reservoirs.The difference between sandstone velocity and mudstone velocity is too weak to predict reservoirs.The quasi-acoustilogging-restrained seismic inversion has been constructed here and got ideal effects in identifying reservoir distribution and thickness.It was indicated that the prediction results were accurate,and this method can be used in the further exploration of the study area.