SURFACE
Reservoir tanks, wells and the surface network run together through time, so a change in one shows up in the others. Schedule events, hold a plateau, honour constraints, screen development options by NPV and put P90/P50/P10 bands on the forecast.
WHAT IT DOES
Forecasting the reservoir, the wells and the surface separately misses the interactions that decide a plateau: as reservoir pressure falls the wells deliver less, the network back-pressure changes, and the constraint that binds moves. The integrated forecast couples them through time.
At each step, every well receives its tank's pressure, water cut and GOR, the network is solved with those wells, and exactly what the network delivered is withdrawn from the tanks. An explicit scheme holds rates over the step; an iterative predictor-corrector converges pressure and rate together. Either way mass is conserved to round-off, and a PI controller on the coupling error sizes the time steps.
On top sit the controls a development plan uses: a field plateau target, choke-back when a constraint binds, lift-gas re-optimisation, well limits and scheduled events. Scenarios compare against a base case, full-factorial screening ranks options by NPV through the Economics engine, and Latin hypercube sampling gives P90, P50 and P10 bands.
KEY CAPABILITIES
The loop that ties the tanks to the wells and the network.
The matched material-balance tanks, carried forward.
The operating decisions of a field development plan.
Compare development options on production and value.
A range on the forecast, from the inputs that matter.
What the plan delivers, and why.
WORKFLOW
Choose the project's material-balance tank, network and economics case. A link that cannot be used blocks the run, with the reason.
Add wells coming on, compressor installs, choke changes and constraint changes through time.
Set the plateau, the choke-back rule, lift-gas re-optimisation and the coupling scheme.
Run in the background and watch the coupling log live.
Compare scenarios against the base, screen up to three variables by NPV, and run the uncertainty bands.
Send the chosen profile to the Economics module.
VALIDATION
The integrated forecast conserves mass to round-off and agrees with Converge's own material balance within 0.1 psi.
There is no external comparison with another integrated-asset tool yet, and the benchmarks page lists it as outstanding. The forecast couples material-balance tanks; it is not coupled to the grid simulator.
Not yet validated Material balance results Network cases V29 and V30
INPUTS AND OUTPUTS
CONNECTED MODULES
Material balance, the surface network and economics are linked by default.
FAQ
Material-balance tanks with their aquifers, using Corey fractional flow for water cut and GOR. It is not coupled to the grid simulator.
Both are available. Explicit coupling holds rates over the step; the iterative scheme is a predictor-corrector that converges pressure and rate together. Mass is conserved to round-off either way.
Wells are choked back when a constraint binds, either pro rata or worst well first, and the results explain which wells were held back and for how long.
Yes. Full-factorial screening over up to three variables, such as well count, compression year and lift-gas availability, ranked by NPV through the Economics engine.
Latin hypercube sampling over in-place volume, aquifer strength, PI, skin, Corey exponents and uptime, 100 realisations by default, giving P90, P50 and P10 bands.