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High-precision q modeling and q migration technology and its applications in loess plateau regions

Applied Geophysics 2024年第4期21卷 835-847,882页

作者： Xu Wei Liu Hong-Xing Mi Hong-Gang Zhang Bing Guo Jun-Chao Ge Yong You Jun China United Coalbed Methane Co. Ltd.Beijing 100015China Beijing Geotarget Research Co. Ltd.Beijing 101102China

The propagation of seismic waves in viscous media,such as the loess plateau and shallow gas regions,alters their amplitude,frequency,and phase due to absorption attenuation,resulting in reductions in the resolution and fi delity of seismic profi les and the inaccurate identifi cation of subtle structure and lithology.q modeling and q migration techniques proposed in this paper are used to compensate for the energy and frequency attenuation of seismic waves,obtain high-quality depth imaging results,and further enhance structural imaging to address the aforementioned ***,various prior information is utilized to construct an initial q model.q tomography techniques are employed to further optimize the precision of the initial q model and build a high-precision q ***,q prestack depth migration technology is employed to compensate for absorption and attenuation in the three-dimensional space along the seismic wave propagation path and correct the travel times,realizing the purposes of amplitude compensation,frequency recovery,and phase correction,which can help improve the wave group characteristics while enhancing the *** data and practical application results demonstrate that high-precision q modeling and q migration techniques can substantially improve the imaging quality of underground structures and formations in the loess plateau region with extremely complex surface and near-surface *** resolution and fi delity of seismic data,as well as the capability to identify reservoirs,can be improved using these techniques.

关键词： absorption compensation q modeling q tomography inversion q migration amplitude preserved loess plateau region

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