应用 L2,p 范数约束的多道层 Q 值估计方法

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中图分类号：P631 文献标识码：A DOI：10.13810/j.cnki.issn.1000-7210.20250120

Abstract： Based on acoustic wave theory and petrophysicaltheory， the observed variations in the seismic wave amplitude and phase typically arise from the coupled effects of intrinsic attnuation associated with rock properties and thin-layer interference related to formation structures.Conventional Q value estimation methods generally overlook this couplingphenomenon，resulting in estimated Q values that represent the combined response of seismic apparent attenuation caused by intrinsic attenuation and thin-layer interference. Meanwhile， inaccurate Q values compromise the sparsity of inversion results for nonstationary reflection coeficients. To decouple the effects of formation intrinsic atenuation and seismic apparent attenuation and thus enhance seismic resolution， this study adopts a Q scanning method， in which an L2，p group sparse norm is introduced to quantify the relationship between reflection coeficient amplitude and intrinsic attenuation.Intrinsic attenuation and apparent attenuation are decoupled by measuring the sparsity of inversion results obtained with different Q values. Additionally，theaccuracyandstabilityof Q value estimation areimproved bymultichannel sparsereflection coefficient inversion，thereby developing a multichannel Q value estimation technology based on the L2，p norm criterion. Finally，the efectiveness of the proposed method is validatedby numerical experiments and actual data. The results demonstrate that this method can accurately estimate the interval Q field varying with the space and time while obtaining seismic data after resolution enhancement.

Keywords： Q estimation，thin-layer interference，intrinsic atenuation，multichannel sparse reflectivity inversion， group sparse norm

0引言

地震波不仅携带了地下构造信息，还携带了岩石中的流体信息。（剩余12606字）