Primary Term

The primary term of an oil and gas lease is the fixed initial period during which the operator holds the right to drill, even without producing the well. It is set when the lease is signed and is most commonly three years, sometimes five, occasionally as short as one year in highly contested areas where the mineral owner has leverage.

If the operator drills a producing well during the primary term, the lease automatically transitions into its secondary term, which lasts as long as production continues. This transition is what is meant by “held by production” or HBP. Once a lease is HBP, the primary term clock no longer matters. The lease persists indefinitely.

If the operator does not drill during the primary term, the lease typically expires at the end of that term and the mineral owner is free to sign a new lease with a different operator (or the same one on different terms). Some leases include extension clauses that allow the operator to extend the primary term by paying additional consideration, often called a delay rental, but modern leases more commonly use “paid up” structures that include all primary-term rights in the initial bonus payment.

Primary-term length is one of the levers in lease negotiation. A shorter primary term puts pressure on the operator to drill quickly or lose the lease, which is generally good for the mineral owner. A longer primary term gives the operator more flexibility but locks the owner into the lease terms even if market conditions change. Three years is the modern standard for active basins.

Owners sometimes confuse the primary term with the lease length overall. The primary term is the initial fixed period only. The actual lease length depends on whether production materializes. A producing lease can extend for decades, in some cases more than a century, all dating back to a primary term of three to five years that long ago concluded.

For inheritors evaluating a leased property, the question of whether the lease is in primary term, in HBP secondary term, or recently expired determines almost everything about the next move. A property with an expired lease is a fresh leasing opportunity. A property in HBP is locked into existing terms.