Illumination and resolution analyses on marine seismic data acquisitions by the adjoint wavefield method

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题名:	Illumination and resolution analyses on marine seismic data acquisitions by the adjoint wavefield method
作者:	陳浩維;Li, Kun-Sung;Chen, How-Wei
贡献者:	地球科學學院地球科學學系
关键词:	Adjoint method;Data acquisition;Data processing;Depth;Field tests;Fluxes;Illumination;Illumination analysis;Mathematical analysis;Ocean bottom seismometers;Orbital velocity;Preconditioning;Pressure;Pressure-velocity wave equation;Reciprocity;Resolution;Resolution analysis;Seismic activity;Seismic analysis;Seismic data;Seismological data;Self-adjoint operator;Sensitivity kernels;Surveying;Velocity;Wave diffraction;Wave propagation
日期:	2012-12-01
上传时间:	2026-04-23 11:35:43 (UTC+8)
出版者:	Chinese Geoscience Union;Taiwan: 中華民國地球科學學會
摘要:	摘要： We applied a wave-equation based adjoint wavefield method for seismic illumination and resolution analyses. A two-way wave-equation is used to calculate directional and diffracted energy fluxes for waves propagating between sources and receivers to the subsurface target. The first-order staggered-grid pressure-velocity formulation, which lacks the characteristic of being self-adjoint is further validated and corrected to render the modeling operator before its practical application. Despite most published papers on synthetic kernel research, realistic applications to two field experiments are demonstrated and emphasize its practical needs. The Fréchet sensitivity kernels are used to quantify the target illumination conditions. For realistic illumination measurements and resolution analyses, two completely different survey geometries and nontrivial pre-conditioning strategies based on seismic data type are demonstrated and compared. From illumination studies, particle velocity responses are more sensitive to lateral velocity variations than pressure records. For waveform inversion, the more accurately estimated velocity model obtained the deeper the depth of investigation would be reached. To achieve better resolution and illumination, closely spaced OBS receiver interval is preferred. Full waveform approach potentially provides better depth resolution than ray approach. The quantitative analyses, a by-product of full waveform inversion, are useful for quantifying seismic processing and depth migration strategies. 出版者： Taiwan: 中華民國地球科學學會出版日期： 2012-12-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2012-12, Vol.23 (6), p.621-632 資源來源： Chinese Electronic Periodical Services (CEPS) 版權： 2012. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2012.06.15.01(T)
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