Impedance Inversion

A detailed investigation of seismic amplitudes can yield information pertaining to lithological variation in subsurface sedimentary rock formations and the existence and extent of some hydrocarbon zones.  This objective can be facilitated by transforming seismic amplitudes into acoustic impedance values in a process called impedance inversion.  In doing so, the seismic reflection response gets transformed into layered impedance response which makes the interpretation of the lithological and fluid information more convenient.

At SamiGeo, we offer various kinds of impedance inversion, namely – band-limited, model-based, sparse-spike, and colored for poststack seismic data, and simultaneous, elastic, joint and geostatistical for prestack seismic data.

Regardless of the method of impedance inversion, the key steps that lend confidence in impedance inversion and quantitative prediction made therefrom are reliable well-to-seismic ties, proper data conditioning, robust initial models, and adequate parameterization for inversion analysis. Therefore, it is essential to follow few QC steps before performing the impedance inversion.