The article presents a new approach to history matching of hydrocarbon reservoirs, and its successful application. In a conventional approach the static geological model is built first, containing also the wells and a certain kind of representation of the outer aquifer. The model must be verified, i.e. history. If the comparison is successful, the model is suitable for forecasting and for evaluating future development scenarios. The simulator calculates the bottom hole pressures, gas oil ratio (GOR) and waster cut (WC) over the entire production history. The reservoir model is modified, if these values do not match the measured ones. [...]

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