Mineral & Royalty Glossary

Mineral ownership comes with its own vocabulary. Below are plain-English definitions of the terms mineral and royalty owners most often need — including the specific interest types American Royalty Buyers purchases. Each links to a fuller guide.

Overriding Royalty Interest (ORRI)

An ORRI is a cost-free share of production revenue carved out of the working interest (the leasehold) rather than the mineral estate. The holder receives a percentage of revenue without paying drilling or operating costs, but the interest is tied to a specific lease and expires when that lease terminates.

Non-Participating Royalty Interest (NPRI)

An NPRI is a royalty carved out of the mineral estate that gives the holder a cost-free share of production revenue but no executive rights — no right to lease, no bonus, and no delay rentals. It is generally perpetual because it is tied to the mineral estate rather than to a single lease.

Non-Operated Working Interest

It is an ownership stake in an oil and gas lease where another company operates the wells. You own a share of production and pay your share of drilling and operating costs through joint interest billings, but you do not run operations or make the development decisions.

Net Revenue Interest (NRI)

A net revenue interest (NRI) is the share of production revenue an owner actually receives after royalties and other burdens are deducted. For a working interest, NRI = working-interest percentage × (1 − total royalty burden); for a royalty owner it is the royalty decimal itself.

Division Order

A division order is a document an operator sends to confirm how a well's revenue is divided, stating each owner's decimal interest and asking the owner to verify ownership and tax details before payments begin. In Texas it confirms payment information and does not change the lease.

Lease Bonus

A lease bonus is the up-front, one-time payment a mineral owner receives for signing an oil and gas lease, typically quoted per net mineral acre and separate from the ongoing royalty. It compensates the owner for granting the lease during its primary term.

Mineral Rights (Mineral Interest)

Mineral rights (a mineral interest) are the ownership of the oil, gas, and other minerals beneath a tract of land, separate from the surface. A mineral owner holds the right to lease the minerals, receive lease bonus and royalties, and share in production — and can sell or bequeath the interest independently of the surface.

Royalty Interest

A royalty interest is a cost-free share of production revenue reserved to the mineral owner under an oil and gas lease. The royalty owner receives a fraction of production (commonly 1/8 to 1/4) free of drilling and operating costs, but does not pay expenses or make operating decisions.

Working Interest

A working interest is the operating interest in an oil and gas lease — the right to explore, drill, and produce, together with the obligation to pay a proportionate share of the costs. Working interest owners receive revenue net of the royalty burden but bear drilling, operating, and plugging costs.

Net Mineral Acre (NMA)

A net mineral acre (NMA) is an owner's proportional ownership of the minerals under one acre of land. If you own a 1/8 mineral interest in a 640-acre tract, you own 80 net mineral acres (640 × 1/8). NMA is the foundational unit of mineral rights valuation.

Decimal Interest

A decimal interest is the fractional share of a well's revenue an owner is paid, expressed as a decimal. It is calculated as your net mineral acres divided by the unit acres, multiplied by your royalty rate, multiplied by your tract participation, and it appears on your division order and check stub.

Held by Production (HBP)

Held by production (HBP) means an oil and gas lease continues in force beyond its primary term because a well on the lease — or a unit that includes it — is producing in paying quantities. As long as production continues, the lease stays alive and the owner keeps receiving royalties under its terms.

Severance Tax

A severance tax is a state tax on oil and gas as it is produced (severed) from the ground, usually a percentage of the sale value. It is withheld from revenue before owners are paid and appears as a deduction on royalty check stubs; rates vary by state (for example, Texas taxes oil and gas at different rates).

Surface Rights

Surface rights are the ownership of the land's surface — the right to build, farm, and occupy — as distinct from the mineral rights beneath. Where the two are severed, the mineral estate is generally dominant, meaning the mineral owner or its lessee has the reasonable right to use the surface to access and produce the minerals.

Primary Term

The primary term is the initial fixed period of an oil and gas lease — commonly three to five years — during which the lessee has the right to drill. If a well producing in paying quantities is completed before it ends, the lease continues into its secondary term (held by production); if not, the lease typically expires.

Delay Rental

A delay rental is a payment an operator makes to keep a lease in force during its primary term without drilling. Many modern leases are "paid-up," meaning the bonus covers the entire primary term and no separate delay rentals are owed.

Shut-in Royalty

A shut-in royalty is a payment that keeps a lease alive when a well is capable of producing in paying quantities but is temporarily not producing or selling — for example, while awaiting a pipeline connection. Paying the shut-in royalty substitutes for actual production to hold the lease.

Pooling & Unitization

Pooling and unitization combine multiple tracts or interests into a single drilling or production unit so a well can be developed efficiently, with each owner sharing revenue in proportion to their acreage in the unit. Your decimal interest reflects your net mineral acres divided by the total unit acres.

Suspended Royalties (Suspense)

Suspense means an operator is holding an owner's royalty payments rather than paying them out — usually because of a title question, an ownership change, a missing tax form, or a bad address. Once the issue is resolved, the accrued funds are released.

Depletion Deduction

Depletion is a federal income-tax deduction that lets a mineral or royalty owner recover the value of the resource as it is produced and sold. For most royalty owners, percentage depletion allows a set percentage of gross royalty income to be deducted each year, subject to IRS rules.

Step-Up in Basis

A step-up in basis resets the cost basis of inherited mineral rights to their fair market value on the date of the previous owner's death. This can substantially reduce or eliminate the capital-gains tax an heir owes when selling shortly after inheriting.

Payor

A payor is the company that issues your royalty check. It is often not the operator you associate with the well — operators pay through subsidiaries and keep legacy or acquired-company names after mergers — so the payor name on your stub may differ from the company running the wells.

Spud

To spud a well is to begin drilling it. The spud date is when the drill bit first breaks ground, typically weeks to months after the drilling permit is filed and well before first production and the royalties that follow.

Fair Market Value

Fair market value (FMV) is the price mineral or royalty interests would sell for between a willing buyer and seller, neither under compulsion. For minerals, FMV reflects production and decline, net mineral acres, operator activity, formations, and commodity prices — the same factors ARB weighs in a free valuation.

Pugh Clause

A Pugh clause is a lease provision that releases the portions of a lease not held by production once the primary term ends — for example, acreage or depths outside a producing unit. It prevents one well from holding a large lease indefinitely, so undeveloped acreage can revert to the mineral owner.

Force Majeure

A force majeure clause suspends a lessee's obligations — and can hold a lease in place — when performance is prevented by events beyond its control, such as certain regulatory actions or natural disasters. Its scope depends on the specific lease language.

Paying Quantities

Producing "in paying quantities" means a well earns more revenue than its operating costs over a reasonable period. It is the standard that determines whether production is sufficient to hold a lease beyond its primary term.

Landowner Royalty

A landowner (or lessor) royalty is the royalty reserved to the mineral owner in an oil and gas lease — the cost-free fraction of production the owner keeps in exchange for leasing. It differs from an overriding royalty, which is carved out of the lessee's working interest rather than the mineral estate.

Chain of Title

The chain of title is the successive record of ownership of a mineral interest — deeds, wills, and conveyances — from the original grant to the current owner. Establishing an unbroken chain is how buyers and operators confirm who owns what before leasing or purchasing.

Gross vs. Net Acres

Gross acres are the total surface acreage of a tract or lease; net mineral acres are your proportional ownership of the minerals within it. If you own a 1/4 mineral interest in a 640-acre tract, that is 640 gross acres and 160 net mineral acres.

Probate

Probate is the court process that transfers a deceased owner's property — including mineral rights — to their heirs or beneficiaries. Minerals often require probate, or an alternative such as an affidavit of heirship, in each state where they are located before title can pass and royalties be paid to the heirs.

Life Estate

A life estate gives one person (the life tenant) the right to income from mineral rights during their lifetime, after which ownership passes to a named remainderman. Selling minerals held in a life estate generally requires both the life tenant and the remainderman to join in the sale.

Title Curative

Title curative is the work of fixing gaps or defects in a mineral interest's chain of title — missing heirs, unrecorded deeds, name discrepancies — so ownership can be clearly established. American Royalty Buyers handles curative work as part of closing at no cost to the seller.

Lease Ratification

Ratification is a mineral owner's formal agreement to be bound by an existing lease or unit they did not originally sign. Watch for ratification language slipped into a division order — a division order should confirm payment only and should not, by itself, ratify a lease.

Post-Production Costs

Post-production costs are the expenses of making oil and gas marketable after it leaves the wellhead — gathering, compression, dehydration, processing, transportation, and marketing. Depending on your lease language, some or all of these may be deducted from your royalty before you are paid.

Decline Curve

A decline curve describes how a well's production falls over time. Permian horizontal wells decline steeply — often 60–80% in the first year — so royalty income is highest early and tapers as the well ages, a key factor in valuing producing minerals.

Type Curve

A type curve is the expected production profile of a representative well in an area — a modeled forecast of how much oil and gas a new well should produce over its life. Buyers use type curves to estimate the value of undeveloped acreage.

Initial Production (IP)

Initial production (IP) is a well's production rate soon after it is brought online, often quoted as a 24-hour or 30-day average (IP30). A high IP signals a strong well, though production declines from there, so IP is only a starting point for value.

Lateral Length

Lateral length is the horizontal distance a well is drilled through the target formation. Longer laterals — often one to three miles in the Permian — generally contact more rock and recover more oil and gas, which can increase the value of the minerals they drain.

Proved Developed Producing (PDP)

Proved developed producing (PDP) reserves are the oil and gas expected to be recovered from wells that are already drilled and producing. PDP is the most certain reserve category and anchors the value of producing mineral and royalty interests.

Proved Undeveloped (PUD)

Proved undeveloped (PUD) reserves are oil and gas expected from locations not yet drilled but reasonably certain to be developed. PUD potential adds value to minerals beyond current production, reflecting future wells an operator is likely to drill.

Affidavit of Heirship

An affidavit of heirship is a sworn statement identifying a deceased person's heirs, often used to transfer mineral rights without full probate. Operators may accept it to update ownership and release suspended royalties, though requirements vary by state.

Mineral Deed

A mineral deed is the legal instrument that conveys ownership of mineral rights from one party to another. It describes the lands, the interest conveyed, and any reservations, and must be recorded in the county where the minerals are located to be effective against third parties.

Executive Rights

Executive rights are the rights to lease the minerals — to negotiate and sign an oil and gas lease and collect the bonus. They can be separated from the right to receive royalties, which is what makes a non-participating royalty interest (NPRI) "non-participating."

Authorization for Expenditure (AFE)

An authorization for expenditure (AFE) is the cost estimate an operator sends working-interest owners before drilling a new well or undertaking a major project, asking each to approve and fund its share. Royalty owners do not receive AFEs; only working-interest owners bear these costs.

Joint Interest Billing (JIB)

A joint interest billing (JIB) is the operator's periodic invoice to a non-operating working-interest owner for its share of a well's operating and capital costs. JIBs are a defining feature of owning a working interest — royalty interests never receive them.

Joint Operating Agreement (JOA)

A joint operating agreement (JOA) is the contract among working-interest owners that governs how a well or unit is operated — naming the operator, allocating costs and revenue, and setting rules such as preferential purchase rights. It controls much of what a non-operated working interest is worth and how it can be sold.

Plugging & Abandonment (P&A)

Plugging and abandonment (P&A) is the process of permanently sealing a well at the end of its life to protect groundwater and the surface. Working-interest owners bear their share of P&A costs, a liability that reduces the value of a non-operated working interest as wells age.

Casinghead Gas

Casinghead gas is natural gas produced along with crude oil from an oil well, as opposed to gas from a dedicated gas well. It is captured at the wellhead and sold or processed, and it can appear as a separate product on royalty statements.

Barrel of Oil Equivalent (BOE)

A barrel of oil equivalent (BOE) converts natural gas into the energy equivalent of a barrel of oil — commonly 6,000 cubic feet of gas per barrel — so oil and gas production can be summed and compared on one basis.

Spacing Unit

A spacing unit is the acreage assigned to a well by a state regulator or a pooling order, within which production is shared. Your decimal interest is your net mineral acres divided by the spacing (or pooled) unit acres, multiplied by your royalty rate.

Well Completion

Completion is the work that makes a drilled well ready to produce — running casing, perforating, and hydraulically fracturing the target formation. First production and royalties follow completion, typically months after the well is spudded.

Escheatment

Escheatment is the transfer of unclaimed royalties to the state after they have gone unpaid or unclaimed for a set period. Keeping your address and ownership current with the operator prevents your royalties from being escheated as unclaimed property.

Mineral Reservation

A mineral reservation is language in a deed by which a seller keeps (reserves) all or part of the mineral rights while conveying the surface. It is the most common way surface and mineral ownership become severed, leaving the surface owner and mineral owner as different parties.

Net Profits Interest (NPI)

A net profits interest (NPI) is a share of the net profit from a property — revenue after specified costs — carved out of the working interest. Unlike a royalty, an NPI pays only when the property is profitable; unlike a working interest, the holder is not liable for losses beyond its share.

Term Royalty

A term royalty (or term mineral interest) is a royalty or mineral interest that lasts for a fixed period, or for as long as there is production, and then reverts to the grantor. It contrasts with a perpetual interest, which the owner keeps indefinitely.

Carried Interest

A carried interest is a working interest whose costs are paid (carried) by another party — often up to a point such as first production or payout — after which the carried owner begins bearing its share. It is a common way to fund drilling without cash from every owner.

Farmout

A farmout is an agreement in which a leaseholder assigns drilling rights to another party in exchange for that party drilling a well, with the assignor often keeping an overriding royalty or a back-in working interest. It is a common way undeveloped acreage gets drilled.

Reversionary Interest (Back-In)

A reversionary interest, or back-in, is the right to receive an interest in a well later — commonly a working interest that "backs in" after the paying party recovers its costs (payout). Until that trigger occurs, the back-in owner receives nothing from that interest.

Drilled but Uncompleted (DUC)

A drilled but uncompleted (DUC) well has been drilled but not yet hydraulically fractured and brought online. A DUC on or near your acreage signals coming production — and future royalties — once the operator completes it.

Rig Count

The rig count is the number of drilling rigs actively operating in an area. A rising rig count signals increasing development and future production, which is why owners and buyers track it as a leading indicator of activity in a basin.

Price Differential (Basis)

A price differential, or basis, is the gap between a benchmark price (such as WTI or Henry Hub) and the price actually received at a specific location, reflecting transportation and local market conditions. Differentials affect the realized price that drives your royalty.

Rule of Capture

The rule of capture is the legal principle that an owner who lawfully produces oil or gas from a well on their tract owns it, even if it drained from beneath a neighbor. It is tempered by well-spacing rules, pooling, and correlative-rights protections.

Accommodation Doctrine

The accommodation doctrine is a legal rule that balances the dominant mineral estate's right to use the surface against the surface owner's existing uses, requiring the mineral owner to accommodate the surface owner where reasonable alternatives exist. Its application varies by state.

West Texas Intermediate (WTI)

West Texas Intermediate (WTI) is the benchmark price for U.S. crude oil, quoted at Cushing, Oklahoma. Permian oil is priced relative to WTI (less a local differential), so WTI movements flow directly into the value of oil-weighted royalties.

Henry Hub

Henry Hub is the benchmark price for U.S. natural gas, quoted at a hub in Louisiana. Gas royalties are priced relative to Henry Hub (less a local differential), making it the reference point for the value of gas production.

Realized Price

The realized price is the amount actually received per barrel or MCF after differentials and deductions, as opposed to the headline benchmark. It is the price that, multiplied by your decimal and volume, produces your royalty — so it matters more than the benchmark alone.

Hydraulic Fracturing

Hydraulic fracturing (fracking) pumps water, sand, and additives into a well under high pressure to crack the rock and release oil and gas. It is what makes low-permeability shale formations like the Permian's produce economically.

Horizontal Drilling

Horizontal drilling turns the wellbore sideways to run a long lateral through the target formation, contacting far more rock than a vertical well. Combined with hydraulic fracturing, it is the technology behind modern Permian development.

Payout

Payout is the point at which the revenue from a well has repaid the costs of drilling and completing it. Many working-interest arrangements — carries, back-ins, and net profits interests — change at payout, so it is a key milestone in a well's economics.

Preferential Right to Purchase

A preferential right to purchase (a "pref right") gives other owners under a joint operating agreement the first opportunity to buy an interest being sold, on the same terms. It can affect how a non-operated working interest is marketed and sold.

Ad Valorem Tax

An ad valorem tax is a local property tax on the value of a producing mineral interest, assessed by the county where the minerals are located. It is separate from severance tax and from income tax, and it typically applies once minerals are producing.

Cost Basis

Cost basis is the value used to calculate capital gain when mineral rights are sold — generally what the owner paid, or the fair market value at inheritance (a stepped-up basis). A higher basis means a smaller taxable gain on a sale.

Undivided Interest

An undivided interest is ownership of a fraction of a whole mineral tract rather than a specific piece of it — each co-owner shares the entire tract in proportion to their interest. Most fractional mineral ownership is undivided, which is why co-owners share the same wells.

Capital Gains Tax

Capital gains tax is the federal — and sometimes state — tax on the profit from selling mineral rights held as an investment, generally the sale price minus your cost basis. Long-term rates, for interests held over a year, are lower than ordinary income rates.

1031 Exchange

A 1031 (like-kind) exchange lets an owner defer capital gains tax by reinvesting the proceeds of a mineral sale into another qualifying real-property interest within set deadlines. Mineral rights can qualify, but the rules are strict and require a qualified intermediary.

Quitclaim Deed

A quitclaim deed transfers whatever interest the grantor has in mineral rights without warranting that the title is good. It is common among family members but offers the buyer no protection if the grantor's ownership turns out to be defective.

Warranty Deed

A warranty deed conveys mineral rights and guarantees that the grantor holds good title and will defend it against claims. It gives the buyer more protection than a quitclaim deed, which makes no such guarantee.

Runsheet

A runsheet is a chronological summary of the recorded documents affecting a tract's title — deeds, leases, assignments, and probates. Landmen prepare runsheets to trace the chain of title and confirm current mineral ownership.

Non-Consent Penalty

A non-consent penalty applies when a working-interest owner declines to fund its share of a proposed well: the consenting owners recover their costs plus a penalty — often several hundred percent — out of the non-consenting owner's share before it participates in revenue.

Take-or-Pay

A take-or-pay clause in a gas sales contract requires the buyer to pay for a minimum volume of gas whether or not it actually takes delivery. It shifts volume risk to the buyer and can affect how and when producers are paid.

Gas Balancing

Gas balancing reconciles differences when co-owners of a well sell their gas at different rates over time, so an owner who took less than its share is later made whole. Balancing can be handled in kind (future gas) or in cash.

Escrow

Escrow is a neutral third party that holds funds and documents during a transaction and releases them when the agreed conditions are met. In a mineral sale, an escrow or title company can ensure the seller is paid as the deed is delivered and recorded.

Undeveloped Acreage

Undeveloped (non-producing) acreage is mineral acreage with no current production. Its value rests on the likelihood and timing of future drilling — operator activity, permits, and offset wells — rather than on existing royalty income.

Dry Hole

A dry hole is a well that does not find oil or gas in commercial quantities. For a mineral owner it means no royalties from that well, though other targets or wells on the acreage may still be productive.

Top Lease

A top lease is a new oil and gas lease a mineral owner grants while an existing lease is still in effect; it becomes effective only if and when the prior lease expires. Owners use top leases to lock in terms with a new lessee ahead of an expiring lease.

Casing Point Election

The casing point is the moment, after a well is drilled to its target, when working-interest owners must elect whether to set casing and attempt a completion or to plug the well. It is a key decision point and cost commitment under a joint operating agreement.

Sidetrack

A sidetrack is a new wellbore drilled off to the side of an existing hole — to bypass an obstruction, reach a better target, or salvage a well. It reuses part of the original wellbore rather than starting a new surface location.

Recompletion

A recompletion reworks an existing well to produce from a different formation or zone — for example, moving to another bench after the original interval depletes. It can restore or add royalty income without drilling a new well.

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