The geocellular models developed by geostatistical techniques are the key of the integrated studies of reservoirs because they are the link between the geological and dynamic models, where they must represent consistently the heterogeneities described by the geologists and geophysicists in the numeric simulation grid.

The study was developed in the B-4 Unit of the "B-Sup VLG-3729" reservoir, located in the off-shore and on-shore Ceuta- Tomoporo Field, west Venezuela. It is dominated by an estuarine sedimentary ambient, with an area above 32000 acres and a thickness of 500 feet. Contains an OOIP above 3 MMMSTB of medium gravity oil, and up-to-date 100 wells have been drilled.

In addition to the traditional stages required to build a geostatistical model, this case of study involved an evaluation of the dynamic response of several equi-probable geostatistical realizations developed by pixel-based algorithms like Sequential Indicator Simulation[3] (SIS) and Sequential Gaussian Simulation[3] (SGS), obtaining the statistical OOIP. Due to the large number of cells considered in the fine grid, a streamline was necessary instead of a finite differences simulator in order to run the model in a reasonable time. In this stage, it was also necessary to apply a conventional reservoir analysis, in order to represent its dynamic behavior.

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