Joint Operating Agreement (JOA)
The contract governing how co-owners jointly develop and operate a unit — naming the operator, the non-operators, and how costs are shared.
A joint operating agreement, or JOA, is the contract that governs how multiple working-interest owners jointly develop and operate a well or unit. It designates one party as the operator — the company that actually drills and runs the wells — and treats the rest as non-operators who own a share but do not run day-to-day operations. The JOA sets out how costs and revenue are split, voting on operations, and what happens when an owner declines to participate.
Most JOAs are built on an industry standard: the AAPL (American Association of Professional Landmen) Model Form 610, with versions from 1956 through 1989 still in wide use, modified by negotiated exhibits. It works hand in hand with the joint accounting procedure that drives joint interest billing.
Mineral and royalty owners are usually not parties to a JOA — it lives on the working interest side. Buyers acquiring working interest, however, are bound by it, so the JOA is essential reading. This is general information, not legal advice.