WHAT IT DOES
Opening, plus receipts, less liftings and losses, equals closing
A terminal holds crude for several owners at once. Converge HCA keeps a stock account for each owner at each tank, terminal and pipeline: opening stock, plus receipts from allocated production, less liftings and losses, plus or minus approved adjustments, gives closing stock.
The calculated closing stock is compared with the measured closing stock from the tank tickets. The difference must sit within a tolerance worked out from the uncertainty of the meters involved; outside it, the imbalance goes to review with a named owner.
Pipeline and terminal losses are shared among the injectors by the formula in the transport agreement. The formula is a configurable rule, because loss-sharing formulas differ between systems and are not always published.