Reservoir Characterization and Modelling of the Paleocene Tambaredjo Field, Suriname

The geology and production history of the Tambarejo field has been studied for the purpose to construct a static and dynamic model for EOR forecasting in particular for polymer injection. The reservoir is at depths of about 300 m and consist of channelized Paleocene sands on top of the Cretaceous unconformity. Thickness of the sands is 10–30 ft. Well spacing is 200 m, part of the field (310 wells) was modeled. Individual channels could not be mapped but channel belts are recognized.

Two Petrel static models were constructed: 1) based on the Sequential Indicator Simulation (SIS) and2) based Object Facies Modeling (OFM). Both are stochastic approaches of facies proportions in wells. Both models were used in the dynamic modeling and both models seem to match the historical production data well. However, during upscaling it appeared that due to cell-size restrictions of the OFM model, the SIS model is preferred. The SIS model is better in run time, smoother facies variations and lower sensitivity to stochastic realizations. The resulting dynamic model gave a surprising good initial history match with the production data and this model is, after further improvements, used for further dynamic modelling to arrive at a polymer injection strategy.