Heavy oils are an important energetic resource because they represent a significant part of the world reserves. The countries with the largest quantity of these resources are: Canada and Venezuela. Several studies have been done on heavy oils and hey express the influence of the temperature, viscosity and density on velocities and the frequency content of the signal propagating through the reservoir (Batzle and Hofmann, 2006; Behura et al., 2007; Han and Liu, 2007). These investigations have shown that the relationships developed for conventional oils cannot be applied for heavy oils. The aim of this research was the evaluation of feasibility of elastic parameters estimation in heavy oil using prestack seismic nversion. In particular, the estimation and quantification of S impedance and density, which are essential properties to describe heavy oil. The results of this study show that the estimation of elastic parameters is possible under certain conditions. In fact, beginning with the design of the seismic survey up to the processing sequence must be taking into account. The significance of this study relies on the evaluation of a geophysical methodology which allows the integration of different kinds of data, not only to reduce the uncertainties but to get a better imaging of the reservoir under study. In the same way, his technique allows to optimize the well location and a better understanding of the reservoir.
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