This online software is a small version of MSE's GASMAN Compression System. In order to use it, please enter a flow value in the input box highlighted and click the RUN button. A results screen will appear showing output data after the run. You can view the Compressor Characteristic, Efficiency and Turbine curves with the operating point by clicking the appropriate buttons. Click OK on the results screen to return to the main screen and try a new run. The full scale GASMAN model has numerous features. What is GASMAN? GASMAN is a model of a gas field system which normally comprises reservoirs, wells, gathering system, compression system and export pipelines. GASMAN simulates the integrated performance of a gas field over its life at specified time intervals (e.g. yearly, quarterly, monthly, weekly or daily) enabling the production profiles to be generated . GASMAN enables case sensitivities to be evaluated e.g. the impact of increasing number of wells on the duration of free flow ( i.e. flow without requiring compression) and the impact of gas compression system on increasing production rates etc. What are GASMAN's uses? The
GASMAN model is used for the evaluation of existing gas field systems, their future production capacities and for finding methods of increasing the field life. GASMAN is extensively used for analysing system capacities with gas compression systems.
It lets production capacities to be maximised with compressor re-design and optimisation. A number of options can be analysed with GASMAN and the options with best NPV selected and recommended for implementation. GASMAN also enables competing schemes to be evaluated in performance and actually tested over field life before a decision is made. The impact of declining reservoir pressures on production capacities can be accurately analysed and flow sensitivities including swing factors assessed. GASMAN is also used for performance monitoring purposes when the model results are compared with an actual field and differences in performances investigated for potential problems.
Running a typical GASMAN Compression System Model GASMAN is a bespoke model developed specifically by MSE for each gas field using data commonly available such as reservoir gas in place, gas produced to date, reservoir pressures and well performance data such as mechanical skin, non-darcy skin and other physical attributes. Once the model is developed and satisfactorily tested it is ready for general use.
It's simple to run - you just specify the daily contract flow and run.
The model also has the ability to vary all the key variables some which are listed below: Number of compressor trains Number of wells open ( in the example number of wells and their flow characteristics have been established) Specify the landing or pipeline (NTS)
pressures (fixed at 75 bara in the example) Performance degradation of compressor and turbines Compressor speed Gas turbine power margins
Results of the run can be saved,
displayed and compared with other cases. Results of GASMAN The summary screen shows all the key parameters for compressor performance analysis including: Compressor discharge pressure Compressor head and volumetric flow for each train Recycle flow Power required and power delivered by the engine Power margins Operating points on the compressor performance maps Operating points on the gas turbine performance maps
The above is just a summary of the data provided. The full scale model has a database full of results which can be accessed and results displayed, analysed and used for forecasting. | 
