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Stable absorption compensation with lateral constraint

Ma Xiong, Li Guofa, Li Hao, Li Jiaojiao, Fan Xu

Acta Geophysica

2020

Vol. 68, no. 4

1039--1048

The presence of seismic absorption distorts seismic record and reduces seismogram resolution, which can be partially compensated by application of absorption compensation algorithms. Conventional absorption compensation techniques are based on 1D forward model with each seismic trace being compensated independently. Therefore, the 2D results combined by each compensation trace may be noisy and discontinuity. To eliminate this issue, we extend the 1D forward model to the 2D forward system and further add an additional lateral constraint to the compensation algorithm for enforcing the lateral continuity of the compensated section. Solving the proposed laterally constrained absorption compensation (LCAC) problem, we simultaneously obtain the multiple compensated traces with lateral smoother transition and higher signal-to-noise ratio (S/N). We testify the efectiveness of the proposed method by applying both synthetic and feld data. Synthetic data examples demonstrate the superior performance of the LCAC algorithm in terms of improving algorithmic stability and protecting lateral continuity. The feld data tests further indicate its ability to not only improve seismic resolution, but also inhibit the amplifcation of high-frequency noise.