Multiparameter full-waveform inversion based on the viscous acoustic-viscoelastic wave fluid–solid coupled#xD;Equation

• DOI: 10.1190/geo2024-0443.1
• Publication Date: 2025-03-28T15:43:13Z
• Authors: Jun Tan; Jian Li; Dewen Qin; Dong Liu; Peng Song; Bo Zhao; Xiuping Jiang
• Keywords: Acoustic wave equation

The marine environment can be regarded as a fluid-solid coupled medium, with the upper layer being fluid medium and lower solid medium. Accurate simulation of seismic waves in is crucial for achieving accurate inversion multiple parameters. elastic wave equation viscoelastic ensemble method regard S-wave velocity domain zero, thus producing erroneous boundary conditions, resulting obvious numerical dispersion energy distortion simulated field at boundary. This has significant implications imaging applications that use amplitude information model building, order to solve these problems, this paper uses viscous acoustic equation, conditions construct wave-viscoelastic based on theory, applies mimetic finite difference(MFD) accurately simulate fields. Based this, multiparameter gradient full-waveform derived. High-precision joint P-wave velocities quality factors was achieved. experiments actual data verification results show proposed advantages modeling inversion, provides new solution geophysical parameters environments.