In this paper reflection data obtained from a seismic line located in the south of Gheshm Island in the Persian Gulf region were processed. Seismic section showed weak amplitudes for deeper reflectors due to energy decay of reflections. To retrieve the weak amplitudes to their true values, the AVO attributes were applied. For this purpose, CDP angle gathers in the incident angle domain were performed. To suppress multiples and noises with high amplitudes, mute windows with different incident angles in the x-t domain were applied. Mute windows with the angles between30 and 35 degrees resulted considerable effects on the noise elimination. To study the amplitude variations versus offset, the AVO gradient section of reflection data was performed. In this stage a negative gradient anomaly was determined in the middle part (1600 — 1800 ms TWT) of the seismic section. The mentioned anomaly with due attention to the geological information was attributed to a gas reservoir. In this study, application of the AVO attributes on seismic data showed that, amplitude due to energy decay that was not present on the routine seismic section could be simulated.