Abstract:

Waveform,amplitude,frequency,speed and impedance of seismic waves change when the waves travel across a hydrocarbon-bearing reservoir.Taking HBC structure of Tongnanba structure belt in Sichuan Basin as an example,the seismic attribute analysis technology and its application to predict carbonate reservoir of Feixianguan formation are introduced.On the basis of logging,drilling,testing data of the Feixianguan formation carbonate reservoir,as well as synthetic seismograms,the patterns of seismic responses for hydrocarbon-bearing reservoir are established,and that seismic attributes such as total energy,average amplitude,average reflect strength and absorption coefficient are sensitivity parameter for reservoir prediction and Hydrocarbon-bearing prediction are confirmed.Comprehensive technology of seismic attributes is applied to predict reservoir and oil and gas accumulation zones and select favorable exploration targets.Study results verify that seismic attribute technology is one of the effective reservoir prediction methods in this area.

Key words: seismic attribute, carbonate rock, Feixianguan formation, Sichuan Basin