Study on Seismic Facies of Changxing Formation upper Deposits in Yuanba Area of Northeast Sichuan

According to Synthetic seismogram,combined with well-logging data and seismic data,the present paper discusses the comprehensive research seismic and geology of Changxing Formation in Yuanba area of northeast Sichuan,form identification marks of High-energy about organic reef and bank reef,Low-energy about plaster.Applying Sequence stratigraphy theory of standardization,to divide seismic sequence,combined with the characteristics of seismic reflection such as amplitude,continuity,interior structures and exterior shapes,seven seismic facies.Study shows that the Changxing Formation can be divided into eight seismic facies,classified to Hing-energy Facies(organic reef,bank reef) and Low-energy Facies(reef between,basin,slop,shelf,bay,lagoon).