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Three-Dimensional Reservoir and Simulation Modeling of Hyperpycnal Systems: A Case Study of LAG-3047, Block X, Misoa Formation, Maracaibo Basin, Venezuela

Helena Gamero1, Lucienne Laporte2, Jose Luis Perdomo1, Tami C. Rahn3, Christina Isakson3, and Freddy Rodriguez2
1 Schlumberger, Caracas, Venezuela
2 PDVSA Occidente, Maracaibo, Venezuela
3 Schlumberger, Houston, TX

The Eocene Misoa Formation is a prolific producer of hydrocarbons in the Maracaibo basin and traditionally has been interpreted as being deposited in a fluvio-deltaic depositional system. Sedimentological interpretation of 1,400 ft of core has led to the development of a new depositional Previous HitmodelNext Hit. The Misoa Formation has been reinterpreted as being deposited from sustained fluvial-derived hyperpycnal flows. The conceptual hyperpycnal Previous HitmodelNext Hit has been Previous HitusedNext Hit to guide correlation of 21 wireline logs and to provide a high-resolution stratigraphic Previous HitmodelNext Hit of the Lower C Misoa Sands. A geostatistical approach was Previous HitusedNext Hit to propagate the facies and the petrophysical properties in the geological Previous HitmodelNext Hit. However, some difficulties were encountered for propagating hyperpycnal channelized-lobe systems, since a standard object-modeling algorithm is useful only for fluvial systems. An alternative three-step methodology was developed to Previous HitmodelNext Hit channelized-lobe systems and proved to be very successful. Forty realizations of the geological Previous HitmodelNext Hit were generated to assess the uncertainty in the distribution of channelized-lobe systems between wells. An advanced software package was Previous HitusedNext Hit to rank the realizations; the best realizations were chosen by historical pressure and production. Two upscaled grids were generated for simulation and prediction. The hyperpycnal depositional Previous HitmodelNext Hit aided in the simulation calibration process because reservoir compartments were easily modified to match the historical pressures and therefore connected reservoir pore volumes. At the end of the calibration process, these reservoir compartments could be Previous HitusedTop to define whether new wells would be likely to contribute to the proposed waterflood or to access new reservoir pools.