New application for viewing a production network

[tskille]

The PR is introducing a new application networkgraph. This can be used to visualize a production network (extended network model). This visualization is also including wells.

Input for this program can be both a data deck and an unified restart file. The user can specify the report step to be visualized with option -r. Default report step is the final report step.

Output from this application run with model

https://github.com/OPM/opm-tests/blob/master/model5/5_NETWORK_MODEL5_STDW.DATA

output to the terminal will be like this.

Report step : 01 'JUL' 2020 00:00:00


  o (PLAT-A) --[5]-- +(B1) :  B-1H B-2H B-3H
  \
   --[4]-- +(C1) :  C-1H C-2H


Fixed pressure nodes: 

  PLAT-A = 21.00