In order to make development seismic inversion and fine reservoir description feasible

we proposed a curve reconstruction method based on frequency division compensation.As logs with different frequency can reflect features of different sandstones

we reconstructed "quasi-wave impedance" curves through high frequency restoration and low frequency compensation.Inversion feasibility analysis experiments showed that result stability could be optimized and reservoir prediction accuracy could be improved through introducing curve reconstruction inversion

simulated annealing algorithm and high well-dense inversion.Meanwhile

forward modeling and inversion proved that 2 meters thin sandstone layer interbeded in thick mudstone could be recognized through development seismic inversion.But for sandstone layers with thickness less than 2 meters

they can be recognized only when interbeded within mudstone layers greater than 2 meters thick.Well-tied seismic sedimentary facies study was also carried out to refine prediction of sandbody volume on sides of channel

channel sand connectivity

channel sand scale change

channel combination and timing of channels.Large distributary channel sandbodies are high in oil potential and remaining oil is commonly caused by imperfect injection-production well pattern.Small distributary channel sandbodies locally have high oil potential

and remaining oil is commonly caused by limited control area of well patterns.