Reservoir simulation model history matching update using a one-step procedure

A computer-based method for rapidly updating a history-matched reservoir simulation model selected from among a plurality of history-matched reservoir simulation models hosted on an information technology system. A software module configured to perform an update by parametrically varying the time over the selected update period and the position for each selected well model file and a corresponding well update file, replacing outdated well model file data with well update file data at each respective time and each respective position. The method is configured by selecting a reservoir simulation model for update, a petroleum field model to use, a reservoir model within the field, and one or more wells within the reservoir for the update. The well model files to be updated and the time interval over which the updates are to be made can be set by a user.