Abstract:On the basis of VSP principle, the offset VSP processing technique is developed which includes normal moveout correction, static correction,compensation for amplitudes of upgoing and downgoing waves, the separation of upgoing and downgoing wavefields by the combination use of median filtering and 2-D filtering, and VSP/CDP conversion. This technique may be used to process not only the normal well VSPndata (fixed long offset or varied offsets) but also the deviated well VSP data. Some new processing programs and some improved surface seismic data processing programs of CYBER 720 computer form this specific VSP processing package.The offset V SP data from two wells were processed, and the processing results prove the processing technique practical, The correlation between seismic reflections and geologic horizons around the well can be ascertained by integratively analysing the VSP processing results, logging data and surface seismic data.