Abstract: The deep seismic data from Liaohe basin assumed indistinct reflectance signature and poor accuracy of signal/ 'noise ratio and migrated imaging. For improving signal/ 'noise ratio, such techniques are applied as amplitude compensation, pre-stack noise removal, residual static correction, multiple rejection and post-stack noise removal. For enhancing the migrated imaging, these techniques, like DMO, migration velocity field smoothing and pre-stack depth migration, are used. By means of these processing techniques, both signal/ signal ratio and migrated imaging accuracy have been obviously enhanced, this making the quality of deep seismic data improved greatly.

Key words: Liaohe oilfield, Deep zone exploration, Seismic interpretation, Seismic data processing, Signal/noise ratio, Migration image, Accuracy, Resolution