Seismic Inversion: Technical Details
Seismic data is band-limited, reducing resolution and quality. LFC Inversion includes both seismic data and well data, where well data serves to add the low frequency information below the usable seismic frequency range and to constrain the inversion.
Wavelets derived and the most appropriate wavelet is chosen. Accurate wavelet estimation is critical to the success of any seismic inversion. The inferred shape of the seismic wavelet may strongly influence the seismic inversion results and, thus, subsequent assessments of the reservoir quality.
To extend the frequency bandwidth available, low-frequency data is derived from log data. The autocepstral frequency bounds were derived and used to guide the low frequency compensated inversion, the resulting acoustic impedance is computed for an appropriate time range. A scaling factor which relates the well and seismic reflectivity is applied during the low frequency compensated inversion process.