| In the process of seismic data processing,interlayer multiples have complex and diverse causes and types and are a strong interference noise.A single conventional method cannot achieve satisfactory suppression of interlayer multiples.Interlayer multiples severely impact the reliability and authenticity of seismic data migration imaging,bring great difficulties to fault and horizon interpretation,and restrict the exploration and development of oil and gas in the target area.Because the land data has the characteristics of a low signal-to-noise ratio,and in suppressing the interlayer multiples of the actual seismic data,it is difficult to use a particular method to consider the large number of seismic data at both near-offset and far-offset.The suppression effect of the secondary wave eventually leads to an unsatisfactory effect of the multiple wave suppression.This paper provides theoretical guidance for later actual data processing through theoretical research on the filtering method and matching subtraction method.At the same time,for the difficulty of multiple suppression between layers,a multi-domain and multi-method combined multiple suppression technology is adopted.The prediction deconvolution is used to suppress short-period multiples,and then high-precision Radon transform is used to predict multiples in the CMP and CRP domains,respectively,and the L1/L2 norm matching subtraction method is used to suppress the interlayer multiples.Through the above method,effective interlayer multiple suppression results are obtained.In the offset stacking section,the continuity of the event axis becomes better,and the structural artifacts are effectively eliminated.The resolution of the data has been dramatically improved.In this paper,the interlayer multiple suppression method is studied and applied for the3 D land seismic data.The final processing result forms a clear image,and the structure is accurate.The continuity of the event axis on the seismic stack section is bette.The information processing results between consecutive layers are evident,and the frequency band has been significantly broadened.Obvious underground geological information can provide relevant basis for subsequent fine structural interpretation and reservoir prediction. |
