A New Mexico mineral file rarely reads the same twice, because Lea County oil and San Juan basin gas are, for appraisal purposes, almost two different states.
New Mexico holds two mineral provinces that behave nothing alike. Lea and Eddy counties sit inside the Delaware basin, the most active corner of the Permian, where lease bonuses, multi-well spacing units, and frequent operator turnover generate a constant stream of comparable data. Up in the northwest corner, the San Juan basin has produced coalbed methane and conventional gas for decades off a much slower, steadier decline curve with far less recent transaction activity.
Because of that split, the first thing we confirm on any New Mexico file is which basin the tract sits in — the appraisal approach, and the kind of comparable evidence available, depends on it.
In Lea and Eddy counties the challenge isn't finding comparables, it's sorting through them. Spacing units get amended, wells get re-permitted, and bonus figures from a lease three sections over may not translate cleanly to the tract in question if the operator, formation target, or working interest structure differs. A documentation-grade appraisal has to specify exactly which offset activity it's relying on and why it's comparable, rather than citing a county-wide average.
State trust land checkerboards through parts of the play as well, which means an appraiser has to separate what's actually privately held mineral acreage from adjacent state or federal tracts that follow different leasing rules entirely.
San Juan basin interests are usually older, often tied to coalbed methane development from the 1990s and 2000s, and the owners are frequently heirs several generations removed from whoever originally leased the land. Comparable sales are thinner here, so the file leans more heavily on historical division order statements and production decline data than on recent market transactions.
Divorce filings involving San Juan basin interests come up more than people expect, since a couple may have acquired the interest early in a marriage and simply never thought about its value until the split — at which point a documented, decline-curve-based opinion becomes necessary for equitable distribution.
New Mexico's community property rules add a wrinkle to both estate and divorce work: minerals acquired during a marriage are presumptively community property, which changes how an interest gets split or valued for a surviving spouse's share. That distinction needs to be resolved in the title research before the appraisal question is even framed correctly.
For gifting, families splitting a Delaware basin interest across children while the owner is still alive want documentation showing fair market value at the time of transfer, which is where recent bonus and royalty data from Lea or Eddy county activity becomes directly useful.
We're not licensed appraisers, attorneys, or CPAs; we research the abstract, pull New Mexico Oil Conservation Division records, and gather division order and lease history so a qualified appraiser has a complete file to work from, whichever basin the interest sits in.
Because Delaware and San Juan basin files require different source records, we typically build a short summary memo alongside the underlying documents, noting which basin each tract sits in, what comparable data was available, and where the record has gaps the appraiser should be aware of before finalizing an opinion.
Resolve these questions so the appraisal conclusion can be traced to a defined interest, date, method, and evidence set.
The appraisal method differs. Delaware basin tracts usually have recent comparable lease and sale data to draw on, while San Juan basin tracts typically rely more on production history and decline curves due to a thinner recent transaction record.
Often, yes. Minerals acquired during the marriage are generally presumed community property, which affects how the interest is divided, so title research needs to establish when and how the interest was acquired before valuation.
No. State trust and federal tracts follow separate leasing rules and aren't part of a private owner's appraisal, but we do confirm the tract boundary so the file isn't mixing in acreage the family doesn't actually own.
Appraisers generally weight recent activity, often within the last year or two, most heavily, though older data still has documentation value when it shows a consistent trend rather than an outlier.
Yes, and when that happens each interest gets its own research track and comparable set within the same estate file, since the pricing basis, decline behavior, and available transaction data differ meaningfully between the two provinces.
Slower in one sense, since sorting through the volume of offset activity to find genuinely comparable data takes more care than working from a thinner record, even though more raw data exists overall.
Carry the same effective date, interest definition, evidence hierarchy, and limitations into these related appraisal procedures.
Written mineral rights appraisals for Colorado owners in the DJ Basin and Piceance Basin, built for probate, IRS Form 706, divorce, and gifting records.
