Sell Your Mineral Rights in McMullen County, TX

If you own mineral rights in McMullen County, you're sitting on acreage that sits in one of the most active Eagle Ford corridors in South Texas — with over 10,300 producing wells and a roster of major operators that includes EOG Resources and Marathon Oil. This is real production, real demand, and real money — and if you've gotten an offer recently, it's worth knowing what the market actually says your rights are worth before you sign anything.

ASSET OVERVIEW

Est. per Acre

$1,500–$5,000

per net royalty acre

Active Wells

10,300+

Drilling Activity

Core Basin

Eagle Ford Shale

Primary Formation

Primary Resource

Oil & Gas

Commodity Type

What Owning Mineral Rights in McMullen County Actually Means Right Now

McMullen County sits in the heart of the Eagle Ford Shale play, and it's not a speculative frontier — it's an actively drilled, actively producing county with more than 10,300 producing wells recorded with the state. The county has seen cumulative production of over 1.6 million barrels of oil and nearly 13.8 million MCF of gas, and operators like EOG Resources, Marathon Oil, and Repsol are still active here. If someone has approached you with an offer, that's not random — buyers don't chase acreage in counties where nothing is happening. Before you decide anything, it's worth understanding what you actually own, what it's likely worth, and why the market is paying attention to McMullen County right now.

McMullen County by the Numbers

10,300

wells

Producing Wells (State Records)

1,600,000

BBL

Cumulative Oil Production

13,800,000

MCF

Cumulative Gas Production

$1,500 – $5,000

per net mineral acre

Estimated Mineral Value Range (per acre, estimate)

Oil & Gas

both

Primary Commodity

Who's Operating in McMullen County

EOG Resources, Inc.

EOG

Marathon Oil EF LLC

MRO

Murphy Expl. & Prod. Co. - USA

MUR

Repsol Oil & Gas USA, LLC

REPYY

BPX Operating Company

BP

Burlington Resources O & G Co LP

COP

What's in the Ground

Eagle Ford Shale

Eagle Ford Shale

The primary target in McMullen County. The Eagle Ford here produces both oil and gas, and it's what's driven the well count to over 10,000. The formation is a proven, large-scale shale play that major operators have been developing for years — not a wildcat prospect. It's the reason this county has meaningful mineral value.

Austin Chalk

Eagle Ford Shale

The Austin Chalk sits above the Eagle Ford and has historically been a secondary target in South Texas. It's seeing renewed interest in some areas as horizontal drilling technology has made it more economic. Not the primary driver of value in McMullen County, but worth knowing it's there.

Buda Limestone

Eagle Ford Shale

The Buda Limestone lies just below the Eagle Ford and is another potential secondary target. It's produced in parts of South Texas and could add upside for mineral owners depending on how leases are structured and what formations operators are targeting.

How a Mineral Rights Sale Works

You Get a Lump-Sum Payment

When you sell mineral rights, you receive a one-time cash payment — typically calculated on a per-net-mineral-acre basis. You're trading future royalty income for certainty today. The buyer takes on all the risk of whether wells get drilled, what production looks like, and what commodity prices do.

We Evaluate What You Own

Before any offer is made, we look at your deed or tax records to confirm what you own, where it is in the county, and whether it's already under a lease or producing. The location of your acreage within McMullen County matters — proximity to active wells and operators affects value.

You Review the Offer — No Pressure

You'll get a written offer with a clear explanation of how we got there. You're not obligated to accept anything. If you want to get a second opinion or talk to an attorney first, we'll tell you to do that. A good offer should be able to stand on its own.

Closing Is Handled for You

If you accept, we handle the title work, the deed preparation, and the recording at the McMullen County Clerk's office in Tilden. You don't need to file anything or travel anywhere. Most closings happen within a few weeks of an accepted offer.

Partial Sales Are an Option

You don't have to sell everything. Some owners sell a portion of their mineral rights — a fraction of their net mineral acres — to get liquidity now while keeping some upside. This is worth discussing if you're not sure you want to exit entirely.

What to Know About McMullen County

County Records Are in Tilden

McMullen County's seat is Tilden, Texas — a small town, but all deed records and mineral conveyances are filed with the McMullen County Clerk there. Texas is a notice recording state, which means that once a deed is recorded, it's public notice of ownership. Any mineral rights transaction you complete should be recorded promptly.

Texas Has No Forced Pooling

Texas does not have a forced pooling statute the way states like Oklahoma or North Dakota do. Operators must negotiate voluntary leases with mineral owners. This means if your minerals are not leased, an operator cannot include them in a unit without your agreement — which can be a negotiating advantage, but also means you could be left out if you don't engage.

Texas Severance Tax on Production

Texas charges a severance tax on oil and gas production — currently 4.6% on oil and 7.5% on gas at the wellhead. This is typically deducted from your royalty check before you receive it. It's not something you pay out of pocket separately, but it affects your net royalty income.

Non-Participating Royalty Interests (NPRI)

In Texas, it's common for prior owners to have reserved a Non-Participating Royalty Interest when conveying minerals. If your deed chain includes an NPRI, that interest gets paid before you do — which reduces your effective royalty. A title review should flag this before any sale or lease is finalized.

Heirship and Intestate Succession

Many mineral owners in McMullen County inherited their rights — sometimes through informal family arrangements that were never legally documented. Texas requires an Affidavit of Heirship or a formal probate to establish clear title if minerals passed without a will. Unclear title can delay or reduce a sale; a local title attorney can help clean this up.

Why Some Owners Are Selling Now

People sell mineral rights for real reasons, not because someone talked them into it. Estate simplification is one of the most common — if you inherited these rights along with siblings or cousins, managing a fractional interest across multiple people is complicated, and a clean sale divides the proceeds simply. Others are selling because they've held minerals for years without production and want certainty over a royalty check that may or may not come. Some have gotten an unsolicited offer and are realizing for the first time that what they own has actual market value. And some just want the cash now — to pay off debt, fund retirement, or invest somewhere they understand better than oil and gas markets. None of these are wrong reasons. The question is whether the timing and the offer price are right for you — and that's worth evaluating carefully, not quickly.

Questions We Hear From McMullen County Owners

I got a letter offering to buy my minerals. Is the offer they made me fair?
Maybe, but you have no way to know without a comparison point. Buyers who send unsolicited offers are often making low opening bids — they expect you to not know what your acreage is worth. McMullen County has active Eagle Ford drilling and 10,300 producing wells recorded with the state, so your rights aren't worthless. Get a second opinion before you sign anything. It costs you nothing to check.
I inherited these minerals but I'm not sure exactly what I own. How do I figure that out?
Start with the McMullen County Appraisal District — they track mineral interests for tax purposes and can give you a sense of what's on record under your name or your family member's name. From there, a title attorney or a land company can pull the actual deed chain from the County Clerk's records in Tilden. It's a process, but it's not unusual — plenty of mineral owners in this county inherited interests without clear documentation.
My minerals are already under a lease. Does that affect what I can sell?
Yes, but not in a bad way — it just changes what you're selling. You can still sell your mineral rights even if there's an active lease on them. The buyer steps into your position as the mineral owner and receives the royalties going forward. A leased mineral interest with a producing well attached is often worth more than an unleased one, because the income stream is already established.
EOG Resources is operating near my acreage. Does that matter for what my minerals are worth?
It can matter quite a bit. EOG is one of the most active and efficient Eagle Ford operators in South Texas. Proximity to active EOG development — or being in an area where EOG already holds leases — can increase the attractiveness of your minerals to buyers. It's not a guarantee, but it's a relevant data point when evaluating your acreage.
How long does it take to actually close a sale if I decide to go through with it?
If you have clear title, it's typically a few weeks from accepted offer to closing. The main variable is title work — if there are heirship issues, missing probate records, or an NPRI buried in the deed chain, that adds time. We handle the research and preparation. The deed gets recorded at the McMullen County Clerk's office in Tilden, and you receive your payment at closing.

Find Out What Your McMullen County Minerals Are Actually Worth

Fill out the form and a real person will reach out — usually within one business day. We'll ask a few basic questions about your acreage, look at what's happening around your specific location in the county, and give you an honest valuation. No obligation, no pressure, no jargon. Just a straight answer.

Get My Free Valuation

Data Sources

Production and operator figures for McMullen County are drawn from DrillingEdge (state regulator production data). Per-acre values are estimates and not an offer.

EXPLORE THE BASIN

Other Eagle Ford Shale Counties

McMullen County is part of the Eagle Ford Shale. See the full basin overview, operators, and counties we serve.

CITIES & COMMUNITIES

Cities & Towns in McMullen County

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