How to improve porosity mapping in heterogeneous reservoir using multicomponent 3C seismic (recommendation based on example from the Drava depression)

The analyzed field is located in the southern part of the Pannonian Basin (Drava depression) and characterized by complex reservoir lithology. Such complexity is very typical for several hydrocarbon field located also in the Drava depression. Porosity values are geostatistically analyzed. Geostatistical mapping included variogram analyses, estimation and simulation. Four variogram models are determined, for each lithofacies and all are approximated with the spherical theoretical model. Unfortunately, the seismic attributes were not significantly correlated to the average reservoir porosity calculated from well-logs. Multi-component 3C seismic technology is providing a new way of looking at reservoirs and should be used for reservoir description and characterization. Azimuthally anisotropy with rotation Alford (1986) can be used for fracture characterization, especially in carbonate reservoir of lithofacies II and partially carbonate breccia in lithofacies I. Finally Full-wave seismic acquisition and processing can improve our geological and geophysical understanding of hydrocarbon reservoirs.