Limitations of deterministic seismic inversion data as input for reservoir model conditioning

Seismic derived impedance data are regularly used as constraints in reservoir models. The use of picked seismic horizons and faults, after suitable depth conversion, provides an excellent structural framework for constructing the reservoir model. However, seismic inversion properties which are derived from seismic amplitude information are more difficult to incorporate into reservoir models. A number of potential problems arise due to (a) differences of scale (support) of measurements and (b) the low frequency model present in a deterministic inversion. Some examples are used to illustrate these problems.