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Reservoir simulation provides a powerful tool for reservoir optimization and management. However, the reliability of the simulation forecasts is strongly dependent on the accuracy of the field geological model. The geological model must give the physical shape and volume of the reservoir as well as the internal segmentation of the reservoir including layers, faults, pinchouts, and unconformities. If these parameters are not well defined then the resulting simulation forecasts may be significantly in error.
In practice, there are always many uncertainties in the geological model for a reservoir because of the scarcity of data. Well data such as cores and well logs sample only a tiny fraction of the volume of the reservoir and therefore there is considerable subjective interpretation in the development of the geological model. 3D seismic data can provide an enormous amount of detailed data about the extent and internal architecture of the reservoir and thus is very useful for reservoir characterization. One of the main difficulties has been to integrate data from geophysics, geology, petrophysics, and engineering in a consistent manner. Often the different disciplines will each have their own somewhat different models of the reservoir. The way around this problem is to have a multidisciplinary team working together for a particular reservoir and to have software that can visualize and integrate data from the different disciplines to create a realistic geological model which can be used for simulation.
Epic Consulting has the latest software for reservoir characterization and geological modeling. Using this software and all the available data including seismic, well logs, geological models, and reservoir engineering data more geologically realistic simulation grids can be constructed. This simplifies the simulation history matching procedure. Epic’s engineers are also familiar with the latest geostatistical techniques and how to integrate geostatistics with reservoir simulation.
See Epic Written Papers on Reservoir Characterization
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Fracture characterization critical for simulation
Permeability characterization dependent on scale
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