Well calibration after a history match in reservoir simulation ensures that the production wells will give realistic rates during the prediction phase. This process is usually very time consuming. The amount of trial-and-error work increases dramatically as the number of wells and/or the well productivity indices increase. In addition, reservoir simulation models are getting bigger and may contain a greater number of wells as computer hardware expands its limits. A reservoir model with hundreds of high productivity wells would take months to calibrate using conventional approaches. This paper describes a systematic well calibration procedure that yields very high degree of accuracy and requires only a fraction of the usual time. It was demonstrated that, with simple planning in the application of the PFV calibration process, a reservoir model with 500 high productivity wells could be calibrated within a couple days after obtaining a successful history match. The PFV procedure is general and it can be applied to any reservoir simulators.

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