Seismic attenuation tomography by envelope peak instantaneous frequency

This letter describes an attenuation tomography method via variations in the envelope peak instantaneous frequencies (EPIFs) of seismic signals. For a linear frequency-attenuation model, assuming that the propagating wavelet can be modeled by a Gaussian function with constant phase, an imaging formula using EPIF variation is derived. In tomography, the simultaneous iterative reconstruction technique (SIRT) with travel-time weighting is proposed for tomographic inversion. Numerical simulations of both noise-free and noise-added data show the validity of attenuation tomography from EPIF variation. SIRT with travel-time weighting yields a better reconstruction and lower residual.