Production Forecasting

Once gas and gas-condensate assets enter the post-plateau phase, the forecasting of the maximum flows achievable becomes more challenging. The asset's capacity becomes a function of the often complex interactions between subsurface and topsides facilities. GASMAN allows interrogation of these interactions by allowing fully integrated models to be developed.

MSE engineers have used GASMAN modeling to forecast production flows on numerous existing and proposed assets. As operations progress, the limiting factor can change. Factors may be, but not limited to, driver power, well draw-down, (e.g. due to water or sand production), compressor discharge temperature, or maximum speed recycle, etc. If an accurate forecast is to be produced, a fully integrated model in which subsurface and topsides facilities are rigorously modeled is vital. Since the factors that affect compression capacity are numerous and complex, rigorous modeling of compression trains (compressor casings and drivers) is particularly important. Such rigorous modeling is afforded by GASMAN.

MSE's extensive experience in the design, testing and troubleshooting of oil and gas assets means that production forecasts produced are realistic and achievable, as well as reflecting actual limitations such as machinery, in service performance levels, alarm settings, process control set-points etc.

The material balance approach applied by GASMAN to the representation of gas and gas-condensate reservoirs allows the effects of ongoing reservoir depletion to be reflected in production forecasts.