Abstract: Provided is hydrocarbon reservoir production system and method that employs a production monitoring system including a well production monitoring system to obtain well production data and gas characteristics of hydrocarbons produced by wells associated with a production region of the reservoir. The production monitoring system adapted to receive selection of modeling parameters, including a selected region and time period, and to generate a set of well performance data including a production data and gas production data for the selected region and time period. A production modeling system adapted to generate, based on the set of well performance data, a model of the performance of the selected region. A production operations system adapted to regulate, based on simulation of the model, operation of wells in the selected region.