Course RM4

Production Forecasting for Reserves Estimation

Throughout the life of an oil or gas well or reservoir, a variety of production forecasting methods may be used in order to estimate reserves. Early on, one uses volumetric or analogues to forecast production. As production and pressure data are gathered, decline curves, material balance, and reservoir simulation methods may be used. This course presents a set of guidelines for using material balance (MBal) and different methods of decline curve analysis (DCA) in conjunction with reserves evaluations. In this 3-day course, the uncertainties, discrepancies and common errors in reserves estimation using actual field case reviews will be discussed.

Detailed Topics

•Introduction -Analogy Methods -Volumetric Methods -Decline Curve Analysis -Material Balance -Reservoir Simulation •Best Practices for Material Balance Application -What Material Balance Gives You -Recommendations -Use of P/Z Plot -Use of Gas-water Contact Rise to Estimate Gas Reserves -Impact of aquifer (weak vs strong) •Decline Curve Analysis -Best Practices for DCA -Limitations and Considerations for DCA -Example 1: DCA Application to an Oil Reservoir •Best Practices for Use of Analogue Data •Best Practices for Reservoirs under Waterflood or with an Active Aquifer •Aquifer impact on Reserve Estimation via Simulation or DCA •Key differences between unconventional and conventional reserves estimation

Duration

Three (3) Days

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