Reservoir heterogeneties play important roles in reservoir description processes. It is therefore imperative to understand the source of uncertainties influencing structural and stratigraphic interpretations of reservoirs. An integrated reservoir, and seismic modeling study over an onshore giant field in Abu Dhabi came to the conclusion that 3D seismic is the most efficient approach to detect the reservoir heterogeneiy and structural uncertainties that are thought to be responsible for the irregular fluid flood front advance and consequently for the reservoir management problems. In preparation for a large vibroseis 3D seismic survey over the subject field, 2D and 3D field tests were carried out to determine optimum source energy distribution. Several versions of the 2D and 3D data were acquired with different source geometries and processed up to stack, migration and inversion (for 3D). The 2D test showed that in this area final data quality does not depend on vibroseis sweep length (i.e. source energy). A subsequent 3D test showed that final data quality is marginally dependent on dense source arrays, but is enhanced considerably using a finer areal distribution of source points. This could be used to improve the data quality and at the same time to reduce the cost of the subsequent production 3D survey.
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