Drilling a well is expensive and risky, so companies rarely do it alone. They partner up: several owners each take a slice of the working interest, split the costs, and split the revenue. But a well can only have one driver. That driver is the operator; everyone else is "non-op."
What the operator does
The operator is the working interest owner that actually runs the well. Its job covers everything hands-on:
- Plans and permits the well, and contracts the rig, crews, and services to drill it.
- Manages production day to day once the well is online — and the maintenance that keeps it running.
- Handles regulatory, safety, and environmental compliance with the state and other agencies.
- Pays the vendors, then bills every other owner for their share through a monthly joint interest billing.
- Often markets the production and distributes revenue, working from the division order that sets each owner's share.
Being operator is real work, so the operator usually charges overhead fees (commonly called COPAS overhead, after the accounting standards most agreements reference) on top of its share of the actual costs — a fixed monthly amount per well to cover its administrative and supervisory time.
What a non-operated owner does
A non-operated working interest owner is, in plain terms, a paying partner. It owns a real piece of the well — real cost obligations and real revenue — but it doesn't run anything. Each month it receives a joint interest billing for its share of costs and a revenue check for its share of production. Its main job is to review: reading the AFEs the operator sends before drilling, checking the billings, and tracking how its wells perform.
Plenty of sophisticated investors and companies own only non-operated interests on purpose. It's a way to get exposure to drilling results without building the staff and machinery to operate wells. The trade-off is control: a non-op owner has limited say over how and when a well gets drilled or worked over.
How the two are tied together
The rules of the partnership live in the joint operating agreement (JOA). It names the operator, sets the overhead rates, and lays out how decisions get made and how costs are shared. One key mechanism it governs is what happens when an owner doesn't want to pay for a proposed well: that owner can elect to "go non-consent," and a carried interest arrangement lets the participating owners recover that cost — often with a penalty — out of the non-consenting owner's future revenue. We cover the JOA itself in what a joint operating agreement is.
Why the distinction matters
If you ever own or evaluate a working interest, the first question is almost always "operated or non-op?" because it changes everything downstream — your workload, your control, your costs (non-ops pay overhead they don't capture), and how much you depend on someone else's competence. An operated interest is a business to run; a non-operated interest is closer to an investment to monitor.
Frequently asked questions
What is a non-operated working interest?
A working interest in a well that someone else operates. The non-op owner pays its share of costs and gets its share of revenue but doesn't drill or manage the well.
What does the operator do that others don't?
It plans and drills the well, hires the crews, manages production, handles compliance, and bills the other owners. Non-ops pay and collect but don't run operations.
Does the operator earn extra for operating?
Usually yes — overhead fees (often COPAS overhead) on top of its share of actual costs, to cover its administrative and supervisory work.
Keep going: start with what a working interest is, read what a JOA is, or see how AFEs and billing work.
Educational information only. This article is not legal, tax, or financial advice. For guidance on your specific situation, consult a licensed professional.