Abstract

Seismic Impedance Inversion is generally considered a direct geological interpretation approach. Through seismic modeling it has been shown that the phase of the input wavelet used for seismic inversion is an important parameters for precise geological interpretation. Inaccurate determination of phase results in erroneous results. Geology described by three layered model of low impedance thick layer sandwiched between two half space relatively high impedance layers has been considered for the study. A synthetic seismic response has been generated by convolving the model with known phase and frequency Ricker wavelet. The Response is from known model and known wavelet. The response has been inverted by same frequency, different phase Ricker wavelet as input wavelet to see whether the known model can be achieved. Study shows the accurate estimation of phase in the data is necessary for carrying out seismic inversion to bring out the Geology in terms of impedance. The wavelet with different phase as input for the inversion results into geology far off from the actual.