Application of seismic techniques in exploration for lithological reservoirs of Shawan Formation in Chepaizi area

The sand bodies of lithologic reservoir are thin,small,and changing laterally quickly in Chepaizi region.Aiming at theses problems,this paper discussed the methods suitable for lithologic reservoir prediction.Based on seismic and geological data,by means of rock physical analysis and forward modeling,we proved that oil sand bodies have a seismic reflection character similar to bright spot.On the base of single well facies analysis,oil sand bodies were identified semi-quantitatively by using seismic sedimentology,and the boundaries of sand bodies were delineated using seismic attribute analysis and frequency decomposition technique.The proposed method has yielded satisfactory results.