Full waveform inversion methods evaluate the properties of subsurface media by minimizing the misfit between synthetic and observed data. However, these methods omit measurement errors and physical assumptions in modeling, resulting in several problems in practical applications. In particular, full waveform...
The proposed approach assumes a 1D stratified earth model, but involves all measured ECa data along a transect in the inversion process using 2D subsurface grid cells. This method incorporates the multi-configuration ECa inversion with the model compression via discrete cosine transform (DCT) to ...
waveform inversioninformationinversionifwiinternationalupstream oil & gasreservoir characterizationiterationlogpWe introduce and analyze implicit full-waveform inversion (IFWI), which uses a neural network to generate velocity models and perform full-waveform inversion (FWI). IFWI carries out inversion by ...
In seismic waveform inversion, the reconstruction of the subsurface properties is usually carried out using approximative wave propagation models to ensure computational efficiency. The viscoelastic nature of the subsurface is often unaccounted for, and two popular approximations-the acoustic and linearized ...
Three-parameter AVO waveform inversion based on Bayesian theorem基于贝叶斯理论的AVO三参数波形反演波形反演贝叶斯理论先验地质约束参数协方差矩阵非线性反演In the actual AVO inversion, the noise and other factors heavily influence the well-posed property of the inversion problem. So AVO inversion constrained ...
Therefore, the steady-state waveform is chosen to excite the joint in the monitoring test. Then, a damage feature in the frequency domain is obtained using a specific signal processing method, by which scattering coefficients are extracted from the time-domain experimental signals. Finally, the ...
Figure 2. The waveform of the received signal and the range compression results with different jamming-to-signal power ratio. (a) Amplitude of the received signal with jamming; (b) range compression result of the received signal with jamming; (c) range compression result of the received jamming...