Mineral rights glossary

The vocabulary that shows up when you take a mineral interest to market — what each term means, what it does to your value, and what to have in hand before you ask for offers.

18terms, written from the seller’s side of the table.

Net Mineral Acres

Your share of a tract expressed in acres — the gross acreage multiplied by your undivided fractional interest. A one-eighth interest in a 640-acre tract is 80 net mineral acres.

Royalty Interest

The right to a share of production revenue free of the cost of drilling and operating the well. It is the form of ownership most mineral owners hold and the form most buyers are looking to acquire.

Decimal Interest

Your share of a specific well, expressed as a decimal on the division order and on every cheque stub. It combines your acreage, the unit size and your royalty fraction into one number.

Held by Production

A lease that continues indefinitely because a well on it keeps producing, long after the original fixed term has run. The lease terms stay as they were written, however old they are.

Royalty Fraction

The share of production a lease pays the mineral owner — historically one-eighth, and commonly three-sixteenths or one-quarter on leases signed in competitive areas in recent years.

Pugh Clause

A negotiated lease term under which undeveloped acreage returns to the mineral owner when the fixed term expires, rather than a single producing well holding the entire leased tract indefinitely.

Division Order

A statement from the operator confirming your decimal interest in a well before royalty payments begin. It confirms arithmetic; it does not change your lease.

Post-Production Costs

Costs incurred after hydrocarbons reach the surface — gathering, compression, dehydration, processing and transportation — which some leases allow to be deducted before royalty is calculated.

Royalty in Suspense

Royalty an operator is holding rather than paying, usually because a title question or missing paperwork has not been resolved. The money accrues to whoever is ultimately confirmed as the owner.

Income Multiple

A rule-of-thumb valuation method that multiplies average monthly royalty income by a number of months — commonly between 36 and 72 — to produce a rough value range for producing minerals.

Unsolicited Offer

An unrequested offer to buy your minerals, typically arriving by letter with a deadline attached and a price set without reference to competing bids.

Competitive Bid Process

Marketing a mineral interest to multiple qualified buyers at once, on a set timetable, so that offers are made in competition with each other rather than in isolation.

Purchase and Sale Agreement

The contract that governs a mineral sale — price, what is being conveyed, the effective date, title conditions, and what happens between signing and closing.

Mineral Deed

The recorded instrument that transfers mineral ownership from seller to buyer, describing exactly what interest is conveyed and in which tracts.

Closing and Funding

The final step of a mineral sale — the deed is delivered and recorded and the purchase price is paid, usually after the buyer has completed title review.

Affidavit of Heirship

A sworn, recorded statement identifying the heirs of a deceased mineral owner, used where a formal probate was never completed in the county where the minerals lie.

Title Curative

The work required to resolve gaps or defects in the recorded chain of ownership — missing probates, unrecorded deeds, name discrepancies, or old leases never released.

Stepped-Up Basis

For inherited assets, the cost basis used to calculate a future capital gain resets to the value on the date of death — which for inherited minerals often removes most or all of the embedded gain.