Building a model

A gathering system model is used to represent field operating conditions. It is also used to identify system bottlenecks, and model the impact of adding new wells, compressor changes, line loops, and system interconnections for either single-phase or two-phase flow.

To build a model for your gathering system:

1. From the splash page when Piper is launched, click New Project and select either GIS Mode, or Cartesian Mode.

2. If Cartesian mode is selected, Piper opens with a delivery facility located at the origin (0,0) of the Cartesian grid. The gathering system can then be built from this point. Continue to step 4.

3. If GIS mode is selected, select from one of the following sub-options:

4. Add facilities. See these topics for additional information: name generator, compressors, separators, and pumps.

5. Add links. See these topics for additional information: editing link diameters, splitting links, optimizing loop links, and reconnecting links.

6. Add elevations.

7. Make sure your model is connected.

8. Add a temperature profile.

9. Set your correlations.

Once the gathering system model is in place, you can begin calibrating and running forecasts on your model.

If you want to model full compositions, surface losses, and/or working interest, click the Forecast Options menu and select the options you need.