New 4D imaging approaches with atypical sparse seismic acquisitions for reservoir monitoring

Summary Reservoir monitoring studies need distinctive consideration when it comes to the removal of undesirable artefacts caused by variations in seismic data acquisition. By attempting to repeat the source and receiver geometries, and parameters, between surveys as precisely as possible, any subsequent 4D noise is minimized. However, in some cases it is uneconomic or not possible to repeat the survey geometries between vintages. This is the case when different OBN seabed layout is used or a towed streamer survey is combined with an OBS acquisition.