Seismic attributes have been used widely in order to obtain geological description of petroleum reservoirs, especially as a support for the definition of horizontal continuity of strata, with special emphasis on terrigeneous formations. Nevertheless the application of seismic attributes to the study of carbonate and naturally fractured reservoirs has been limited.

This paper shows the application of seismic attributes and seismic inversion to the geological and petrophysical characterization of a naturally fractured reservoir with complex lithology, which is characteristic of the most important producing formations in Mexico.

Taking into account petrophysical and lithological data obtained from core and well logs, it was possible to define some empirical relations that link the response of the seismic attributes with the petrophysical characteristics of the strata, such as porosity and fracturing, this relations are valid only for the carbonate formations at SE of Mexico. On the other hand, the horizontal continuity of lithology, as well as the detection of discontinuities, can be inferred from pseudo-velocity data obtained from the application of some seismic inversion techniques. It was carried out an analysis with the purpose of proving the effectiveness of these techniques for this kind of formations.

To obtain appropriate results from seismic data, it is necessary to consider the map of the main faults, since in areas with high fracture intensity, an important loss of amplitude from the seismic data frequently occurs.

The results from this techniques provide the basis for the definition of a realistic geological model, which is of prime concern for reservoir's characterization, numerical studies and EOR applications.

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