Discrimination between Real and Artificial Time-Lapse Changes in OBC-Data

A-14 DISCRIMINATION BETWEEN REAL AND ARTIFICIAL TIME-LAPSE CHANGES IN OBC- DATA Abstract 1 JESPER SPETZLER 1 and ØYVINDKVAM 2 1 Dept. of Applied Earth Sciences TU-Delft TheNetherlands 2 Dept. of Petroleum Engineering and Applied Geophysics NTNU Wepresent anew method for time-lapse monitoring of OBC data. The time-lapse monitoring accounts for several important non-repeatability effects which is shown in a synthetic experiment. Introduction Non-repeatability effects (e.g. acquisition differences between two surveys noise and overburden effects) in 4D experiments can easily result in unrealistic time-lapse changes where actually none exists. Before continuing reading try the following exercise; Decide which one of the