We present an overview of new and recent applications of multivariate geostatistical filtering techniques applied to 3D and 4D processing.

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe flow properties of fractured reservoirs are highly dependent on the prevailing fracture characteristics. A detailed knowledge of these subsurface patterns is therefore crucial for optimising reservoir production and performance. Fracture information is available at a wide range of scales. At one end, there are structural interpretations and basin models that describe faulting on a kilometer scale and at the other end, downhole measurements (borehole image logs) and core samples which provide fracture characterisation on a centimeter scale. Fractures of all lengths are created by regional tectonic stresses and therefore have comparable characteristics, such as orientation and density, regardless of scale. The seismic method records reflections that exhibit azimuthal variations in amplitudes and traveltimes in the presence of fractures. Thus the gap between faults and micro features is bridged by sub-seismic fracture characterisation from azimuthal anisotropy (Rüger, 1998, Bakulin, et. al., 2000. An integrated workflow is presented that reconciles all available geological, geophysical and engineering information to build unified and consistent fractured reservoir models.