For the history matching of large reservoirs it is necessary to change local parameters after successful global matching. These modifications have to be made only in a relatively small part of the reservoir, but the influence of the whole reservoir has to be taken into account, too.

The new technique "gathering" enables to combine blocks outside the focused area. This not only reduces costs but also increases the chances of success.

Comparative simulations with full and gathered block systems show extensive agreement of the results for the focused area.

Keywords:
block gathering, reservoir surveillance, drillstem/well testing, procedure, implicit variable, resistance, pvt measurement, gathering, equation, fundamental block
Subjects:
Well & Reservoir Surveillance and Monitoring, Fluid Characterization, Reservoir Fluid Dynamics, Reservoir Simulation, Formation Evaluation & Management, Phase behavior and PVT measurements, Flow in porous media, Drillstem/well testing
Copyright 1986, Society of Petroleum Engineers
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