This is the ninth installment in our series of blog articles dealing with Source-to-Pay and upstream oil and gas. Read the previous blog here.
Most finance teams at upstream operators spend a lot of energy at the invoice stage. That is where the reviews happen, where the exceptions get flagged, where someone finally asks why a line item costs what it costs. It makes sense, because the invoice is the moment money is formally on the hook. The trouble is that by the time an invoice lands, almost every decision that determined its size has already been made. For instance, the price was probably agreed to weeks ago, and the work was authorized. The quantities were committed in the field. So, in other words finance is reviewing a decision that is, for all practical purposes, already spent.
That is why the invoice, useful as it is, tends to be a lagging indicator. If you want to control what gets paid, the place to look is earlier, at the order. We actually discussed why this matters in an earlier blog in our series here.
Key Takeaways
Why is the purchase order such an important control point for finance?
- Because the order is where price, scope, and budget are committed. Once an order is approved, the invoice that follows is largely predetermined, so controls applied at the order stage prevent problems rather than catch them after the fact.
What goes wrong when ordering is loosely controlled?
- Off-budget spend, off-contract pricing, and unapproved scope slip through and only surface at the invoice, where they are expensive and awkward to unwind. Finance ends up reconciling surprises instead of preventing them.
How does stronger order control help the whole source-to-pay process?
- When orders carry the agreed price and route through the right approvals, the downstream invoice matches cleanly, reconciliation shrinks, and finance gets an early, accurate read on committed spend against budget.
The invoice is where the money shows up, not where it is decided
Think about the sequence of a typical field purchase. Someone needs a service or a material. A rate has usually been negotiated already, sitting in a contract or price book. An order goes out. The work happens. Then, sometime later, an invoice arrives and someone in accounts payable checks it against what was expected.
Every meaningful lever in that sequence sits before the invoice. The price was set in the contract. The commitment was made at the order. The only thing the invoice review can do is catch a mismatch after the money is already owed, and catching it then is the expensive way to do it. You are now disputing a charge with a supplier who has done the work, holding up a payment, and spending staff time reconciling something that a control at the order stage would have prevented outright.
This is the quiet reason invoice-heavy processes stay busy without getting more in control. The team is working hard at the wrong end of the timeline.
What good order control actually looks like
Moving control upstream does not mean adding friction to the field. It means making sure that when an order is created, it already carries the right price, sits inside the right budget, and routes to the right approver before anything is committed.
In practice, that comes down to a few things working together. Orders should pull from agreed pricing automatically, so the rate on the order is the rate that was negotiated. Approval workflows should be configurable to your policy, so the right people sign off at the right thresholds and nothing large moves without a decision. Budget and commitment tracking should show incurred and committed spend against budget as orders are placed, so finance sees exposure building in real time instead of discovering it at month end. And for recurring or high-volume needs, blanket orders let you pre-approve within agreed limits, which keeps the field moving quickly while the guardrails stay in place.
Enverus OpenOrder is built around exactly this idea. It lets teams create and manage purchase and job orders with the agreed price and the right approvals applied at the order stage, tracks commitments against budget as spend is authorized, and supports blanket orders for the repetitive purchasing that makes up so much of field activity. Later, when the ticket and the invoice come through, OpenOrder matches them against the order and the agreement, so the reconciliation that used to eat your team’s time mostly takes care of itself. If you’re interested, learn more about how we handle this process here.
The result is a change in where the work happens. Instead of a large effort at the invoice stage to catch problems after the money is committed, you get a smaller, earlier effort at the order stage that keeps those problems from occurring. Finance ends up with tighter control and a clearer view of committed spend, and the field barely notices the difference because the order process is faster and cleaner than the workarounds it replaces.
The invoice will always be where the money shows up. The order is where you can still do something about it.
