Sell Your Mineral Rights in Karnes County, TX
If you own mineral rights in Karnes County, you're sitting on some of the most productive Eagle Ford acreage in Texas — and that's not marketing language, that's what the production numbers say. With over 100 million barrels of cumulative oil production and nearly 4,800 producing wells, this county is the core of the core. Before you respond to any offer or sign anything, make sure you know what your acres are actually worth.
Est. per Acre
$3,000–$12,000
per net royalty acre
Active Wells
4,782+
Drilling Activity
Core Basin
Eagle Ford Shale
Primary Formation
Primary Resource
Oil
Commodity Type
What You Actually Have in Karnes County
Karnes County sits squarely in the sweet spot of the Eagle Ford Shale — the oil window, which produces the highest-value hydrocarbons in the play. This isn't a fringe county hoping for development; it's one of the most drilled, most produced counties in the entire formation. With 4,782 producing wells on record and cumulative oil output exceeding 100 million barrels, the geology here has proven itself many times over. Major operators including EOG Resources, Marathon Oil, and Devon Energy have committed serious capital to this county for over a decade, and activity continues today. If you've received an offer recently, it's not a coincidence — buyers know what's here, and they're actively looking for sellers who don't.
Karnes County by the Numbers
4,782
wells (state regulator data)
Producing Wells
100,309,228
BBL
Cumulative Oil Production
310,769,036
MCF
Cumulative Gas Production
$3,000 – $12,000
estimate only — varies by location, depth, and royalty interest
Estimated Value Range (per net mineral acre)
Oil
Eagle Ford oil window
Primary Commodity
Who's Operating in Karnes County
EOG Resources, Inc.
EOGMarathon Oil Ef LLC
MRODevon Energy Production Co, L.P.
DVNBPX Operating Company
BPMagnolia Oil & Gas Operating LLC
MGYRepsol Oil & Gas USA, LLC
REPYYWhat's in the Ground
Eagle Ford Shale
The primary target in Karnes County. The Eagle Ford here sits in the oil-prone window — meaning the rock produces crude oil rather than dry gas or condensate. That distinction matters enormously for value. Karnes County is widely regarded as core Eagle Ford acreage, where operators have drilled some of the highest-IP wells in the entire play. When buyers come calling in this county, this is the formation they're pricing.
Austin Chalk
The Austin Chalk sits above the Eagle Ford and has seen renewed interest as operators apply horizontal drilling techniques to what was once considered a depleted play. In some parts of Karnes County, Austin Chalk rights may add incremental value to a mineral package, particularly where operators are stacking targets. It's worth knowing whether your deed includes rights to this formation.
Buda Limestone
The Buda Limestone lies below the Eagle Ford and has been tested in parts of South Texas as an additional target. It is not as widely developed as the Eagle Ford in Karnes County, but in some cases it adds optionality to a mineral package. A thorough title review should identify whether your rights extend to this horizon.
How a Mineral Rights Sale Actually Works
You Get an Offer — Then What?
Most owners first hear from a landman or acquisition company reaching out by letter, phone, or email. That offer is not a starting point set in your favor — it's set in theirs. Before you accept anything, you want to know how many net mineral acres you actually own, whether there are existing leases and what they say, and what comparable deals have looked like in your area.
The Title Process
Once you agree to a price in principle, the buyer will do a title exam — usually through an oil and gas attorney reviewing records at the Karnes County Clerk's office in Karnes City. This can take a few weeks. If title comes back clean, you sign a deed and they wire funds. If there are title issues (common with inherited minerals), those get worked out before closing, sometimes requiring an affidavit of heirship or a court proceeding depending on how the estate was handled.
Lease vs. Sale
Selling your minerals outright is a permanent transfer — you give up all future royalties in exchange for a lump sum today. Leasing is temporary — you receive a bonus payment and then a royalty on production for the lease term, but you keep ownership. Some owners prefer the certainty of a sale; others want to stay in the game. Both are legitimate strategies, and the right choice depends on your financial situation, how many heirs are involved, and your view on long-term oil prices.
What You'll Net After Taxes
In Texas, there's no state income tax, but a sale of mineral rights is a capital gains event for federal tax purposes. The cost basis is typically the value at the time you inherited the rights (stepped-up basis) or what you paid if you purchased them. An accountant familiar with mineral rights transactions can help you structure things to minimize tax exposure. Don't skip this step — it can meaningfully affect your net proceeds.
What to Know Before You Sign Anything in Karnes County
Recording at the Karnes County Clerk
Mineral deeds in Texas are recorded with the County Clerk, located in Karnes City. Texas follows a 'race-notice' recording statute, which means the first party to record a properly executed deed generally has priority. If you're selling, confirm your buyer records promptly. If you're trying to verify what you own, start with the County Clerk's index and work backward through chain of title.
Texas Has No Compulsory Pooling
Unlike many other states, Texas does not have a compulsory pooling statute that forces mineral owners into a unit. In practice, this means operators form voluntary pooled units, and your lease terms govern whether and how your acres are pooled. If you're un-leased and a well is drilled on or near your acreage, you may have the right to participate as a working interest owner — or you may be excluded, depending on the unit configuration. This is one reason lease language matters so much in Texas.
Non-Participating Royalty Interests (NPRIs)
If your family has owned land in Karnes County for generations, there's a reasonable chance that somewhere in the chain of title, a non-participating royalty interest was carved out. An NPRI entitles the holder to a fraction of gross production but gives them no say in leasing decisions. These show up in old deeds and can reduce the royalty a current mineral owner receives. A title search will surface them.
Texas Severance Tax
Texas imposes a 4.6% severance tax on oil production and a 7.5% tax on gas production. These are deducted from your royalty check before it reaches you and are paid by the operator. You don't file separately for these — they're handled at the operator level — but they do affect your net royalty income and should be factored into any valuation of your interest.
Inherited Minerals and Heirship
If you inherited mineral rights without a formal probate, the title may be considered 'open' in Texas. Buyers and operators will want that resolved before they pay you or put you on division order. Common fixes include an Affidavit of Heirship (recorded in Karnes County) or, where the estate is more complex, a muniment of title proceeding. Neither is insurmountable, but both take time and require a Texas attorney.
Why Some Karnes County Owners Are Selling Right Now
Not everyone selling mineral rights needs the money urgently. The reasons we hear most often are simpler than that. Some owners have dozens of small interests scattered across multiple counties, each generating a modest royalty check — and selling clears the complexity without sacrificing much income. Others have inherited rights with co-owners (siblings, cousins) and find that managing the interest together is harder than it's worth. Estate planning is another common driver: mineral rights have real value that needs to show up on a balance sheet, and some families prefer to take that value now rather than pass a fractional interest to the next generation. And some owners have watched oil prices and are simply choosing to take a strong market while it lasts rather than bet on where prices go next. None of these are wrong reasons. The right decision depends entirely on your situation, not ours.
Questions We Hear From Karnes County Owners
I got a letter offering to buy my mineral rights in Karnes County. Is it a fair offer?
Karnes County has so many producing wells — does that mean my acres are definitely worth a lot?
EOG and Marathon are operating in Karnes County. Does it matter which company is on my lease?
I inherited mineral rights in Karnes County but never did anything with them. How do I find out if there's production?
What's a realistic per-acre value for mineral rights in Karnes County right now?
Find Out What Your Karnes County Minerals Are Worth
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Get My Free ValuationData Sources
Production and operator figures for Karnes County are drawn from Wikipedia, and DrillingEdge (state regulator production data). Per-acre values are estimates and not an offer.
Other Eagle Ford Shale Counties
Karnes County is part of the Eagle Ford Shale. See the full basin overview, operators, and counties we serve.
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