Summary
The false ‘bright spots’ which are caused by thin-bed tuning are often present in post-stack seismic data. The essence of these false ‘bright spots’ is different from that of those real bright spots associated with gas charged reservoir. Based on petrophysical parameters of real reservoir, the models of wedge and thin-bed are designed, the thin-bed tuning is simulated, and the relations between thin-bed tuning and gas charged reservoir with frequency are studied. The result of processed marmousi ¦ model indicates that the high amplitude caused by thin-bed tuning can be distinguished from that caused by gas charged reservoir by analyzing the differences between normalized different frequency sections obtained by TFCWT. At last, the field example illustrates further that this method proposed in this paper can be used to identify gas charged reservoir effectively.
