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Texas · Permian Basin · Midland Sub-Basin

Sell Mineral Rights
in Glasscock County,
Texas.

Glasscock County is one of the smaller Texas counties by population, but one of the most active by oil and gas development. Sitting in the southern core of the Midland Basin, it has stacked Wolfcamp and Spraberry inventory and a heavyweight operator base. If you own minerals here, you are sitting on quality rock. We are happy to help you understand what you have.

~900sq mi
County Area
small footprint, dense activity
~9,500ft
Wolfcamp Depth
typical TVD
10,000ft
Standard Lateral
with longer pilots
Multiple
Stacked Targets
Wolfcamp A/B/C, Spraberry, Dean
RRCDist 8
Texas Railroad Comm.
Midland office
01 The Basin

Quiet county,
heavyweight rock.

Glasscock County sits directly south of Howard County and east of Midland County, in the heart of what operators and analysts call the southern Midland Basin core. The county itself is small and lightly populated, with Garden City as the county seat and only a few hundred year-round residents in town. But the rock underneath is among the most actively developed in the country.

The Midland Basin is the eastern half of the broader Permian Basin. Within the Midland Basin, the southern counties (Glasscock, Reagan, Upton, southern Midland) hold particularly thick stacked Spraberry and Wolfcamp sections. These intervals have been the focus of consistent horizontal drilling for more than a decade, and operators have drilled hundreds of wells across Glasscock alone. Many spacing units have multiple wells already producing, with additional locations still to be drilled.

Glasscock is the kind of county that does not get headlines, but it produces. The southern Midland Basin core has been one of the most reliably productive areas in the Permian for the better part of fifteen years.

If you are reading this, you may own a piece of that. Maybe you inherited minerals through a chain that goes back to original ranch families or homestead patents. Maybe you have been receiving royalty checks for years and recently noticed the operator name changed (Pioneer to ExxonMobil being the most common shift). Maybe an operator just sent you a letter asking to lease unleased acreage. This page walks through the rock, the operators, the geography, valuation, and the regulatory landscape including the Texas Railroad Commission process.

Starting point

Have minerals in Glasscock County? Send us what you have and we will take a look.

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02 The Rock

Stacked pay across the
Midland Basin column.

Glasscock County's productive geology is thick and layered. The Wolfcamp formation, divided into multiple benches, is the deepest active target. Above it sits the Spraberry, with Lower, Middle, and Jo Mill members each productive in their own right. The Dean sandstone sits between the two main packages. Modern operators routinely develop multiple zones from the same surface pad, with some pads supporting eight or more horizontal wells.

WolfcampPermian unconventional core

The Wolfcamp formation is the deepest and one of the most productive unconventional targets in Glasscock County. It is divided into multiple distinct benches (Wolfcamp A, B, C, and sometimes D), each capable of supporting horizontal development. Wolfcamp A and B are the primary current targets across the county, with operators routinely drilling multiple horizontals per spacing unit across the two benches.

For mineral owners, Wolfcamp development typically means multiple wells per spacing unit drilled over the life of development, with each well representing a separate revenue stream tied to the same minerals. Modern Wolfcamp completions use very large amounts of proppant and have steeper initial decline curves than older vintage wells.

Depth Range
8,500 to 10,500 ft
Type
Calcareous mudstone
Active Benches
Wolfcamp A and B primarily
Typical Lateral
10,000 ft, longer pilots
SpraberryLower, Middle, Jo Mill

Above the Wolfcamp sits the Spraberry, one of the historic backbone formations of the Midland Basin. The Spraberry is divided into Lower Spraberry, Middle Spraberry, and the Jo Mill member, with each interval producible. The Lower Spraberry has been the most consistently developed horizontal target, but Middle Spraberry and Jo Mill activity has grown as operators delineate the full stack.

For mineral owners, Spraberry inventory adds meaningfully to total drilling potential per spacing unit. Combined with the Wolfcamp benches below, a single section of Glasscock minerals can support a dozen or more horizontal wells over the course of full development.

Depth Range
6,500 to 8,500 ft
Type
Mixed sandstones and shales
Active Members
Lower, Middle, Jo Mill
Status
Heavily developed
Dean & Other Targetssupporting horizons

Between the Spraberry and Wolfcamp sits the Dean sandstone, a thinner but locally productive interval that operators target selectively. The Dean is not always horizontally developed, but where it is, it adds another layer to the stacked pay column. Older vertical production from Spraberry and shallower zones still continues across many parts of the county.

The practical implication for mineral owners is that even spacing units with extensive Wolfcamp and Spraberry development may have additional inventory in supporting intervals like the Dean, plus legacy vertical production that continues to generate income.

Dean Depth
~8,000 ft
Type
Sandstone
Status
Selective horizontal, legacy vertical
Where Active
Variable across county
03 The Operators

Who is drilling on your
Glasscock County minerals.

The Permian operator landscape consolidated dramatically through 2023 and 2024, with multiple multi-billion-dollar mergers reshaping the operator list. The operators below are leaders in current Glasscock County activity, though Glasscock has additional meaningful operators beyond this list.

i.
ExxonMobil (formerly Pioneer Natural Resources)
Pioneer Natural Resources was historically the dominant operator across the southern Midland Basin, including Glasscock County. ExxonMobil completed the acquisition of Pioneer in 2024, folding the position into the broader Exxon and XTO portfolio. For Glasscock mineral owners, this means many royalty statements and division orders that previously bore Pioneer's name now show ExxonMobil or XTO. Underlying lease terms are unchanged.
Major · Pioneer legacy
Largest in Glasscock
ii.
Diamondback Energy
Diamondback Energy holds a substantial Midland Basin position and grew further with the 2024 combination with Endeavor Energy Resources, one of the largest privately-held Permian operators. Endeavor had meaningful Glasscock County acreage. The combined Diamondback footprint is now one of the most active drilling programs across the southern Midland Basin core.
Public · Endeavor combined
Top 3 in Glasscock
iii.
Apache Corporation (APA)
Apache, now operating under parent APA Corporation, has held meaningful Permian acreage across the Midland Basin for decades, including positions touching Glasscock and surrounding counties. Apache's Permian activity has shifted in recent years as the company has redirected capital across various plays, but legacy production and continuing development remain.
Public · Long-standing
Active Operator
iv.
Vital Energy (formerly Laredo Petroleum)
Laredo Petroleum, rebranded as Vital Energy, has historically focused much of its activity on Glasscock and Reagan counties in the southern Midland Basin core. Vital is among the more concentrated public operators in this area and has been a consistent driller across multiple cycles. Many Glasscock mineral owners receive checks tied to Vital or Laredo wells.
Public · Glasscock-focused
Top Local Operator
v.
Long Tail of Public and Private Operators
Glasscock County has additional meaningful operators including Crownquest, SM Energy nearby, various private operators, and smaller public companies with concentrated southern Midland Basin positions. Mineral owners may see different operator names on different wells within the same general area depending on which operator drilled which spacing unit. Operator names also shift as acreage changes hands.
Mixed · Many active
Many Active Operators
See a familiar name?

We know how these operators develop in Glasscock County. Happy to give you context on yours.

Ask About Your Operator →
04 The Geography

Not all Glasscock County
minerals are built the same.

Glasscock County covers about 900 square miles in the southern Midland Basin. The county is small enough that rock quality is reasonably consistent across most of it, but operator footprints, lease histories, and current drilling activity still vary by area. Garden City, the county seat, sits roughly central to the county. Where in the county your minerals sit shapes operator activity, lease terms, and timing.

Garden City Core
T2S-T3S Central County
The geographic center of the county and historically one of the most active drilling areas. Spacing units in this area have typically seen extensive Wolfcamp and Spraberry development, with many already at multi-vintage well counts. Remaining inventory is meaningful given the depth of stacked pay.
Activity: Highest Development: Mature, infill
Northern Glasscock / Howard Border
North County
Northern Glasscock transitions toward Howard County, another active Midland Basin county. Operators frequently drill across the county line where geology supports it. Activity here has been strong, with both legacy operators and newer entrants developing Wolfcamp and Spraberry inventory.
Activity: High Development: Active
Western Glasscock / Midland Border
West County
Western Glasscock runs along the Midland County line, into some of the most active Midland Basin acreage. Pioneer (now ExxonMobil) historically dominated much of the activity here, and the post-acquisition operator footprint is still settling. Inventory remains substantial.
Activity: High Development: Active, transitioning
Eastern Glasscock / Sterling Border
East County
Eastern Glasscock transitions toward Sterling County, where the Midland Basin core thins eastward. Activity tapers somewhat in the easternmost townships, but selective horizontal development continues, particularly in the Wolfcamp where the section remains thick.
Activity: Moderate Development: Selective
Southern Glasscock / Reagan Border
South County
Southern Glasscock runs into Reagan County, which is among the most active counties in the entire Midland Basin. The Glasscock-Reagan border area carries some of the strongest stacked-pay characteristics in the county. Operators routinely drill across the line, and many spacing units span both counties.
Activity: High Development: Active
Legacy Vertical Areas
Scattered
Glasscock has substantial legacy vertical production that predates the horizontal era, particularly in Spraberry and shallower zones. Some sections have hundreds of older vertical wellbores still producing alongside newer horizontal development. Mineral owners often see both vintage royalty checks and modern horizontal royalty checks for the same minerals.
Activity: Continuing legacy Development: Vertical plus horizontal
05 Your Valuation

What your Glasscock County
mineral rights are worth.

Valuation in Glasscock County reflects the strength of the southern Midland Basin core. Multiple stacked formations, deep remaining inventory, well-capitalized operators, and consistent infrastructure investment all support strong mineral valuations. The four scenarios below cover what we see most often.

01
Producing Minerals with Active Royalty Income
Valued on cash flow plus deep remaining inventory
If your Glasscock County minerals are actively producing, valuation typically starts with the trailing twelve months of royalty income. A buyer applies a multiple based on expected remaining well life, future drilling potential across stacked Wolfcamp and Spraberry intervals, and commodity outlook. Glasscock multiples tend to be among the strongest in the Midland Basin because the inventory depth supports many additional locations on most spacing units.
What shapes the number: well vintage and remaining life across multiple existing wells, how many additional Wolfcamp and Spraberry locations remain undrilled, your royalty rate, the operator quality, and your lease cost-deduction language.
02
Unleased Minerals in Active Development
Valued on drilling proximity and future potential
Unleased Glasscock County minerals, particularly in the Garden City area or the active operator footprints near the Reagan border, are valued aggressively on expected development timing. Operators are competing for acreage across the southern Midland Basin core, which supports strong lease bonus and royalty rate negotiations. Unleased minerals also carry optionality.
What shapes the number: nearby permit activity, the operator's recent drilling pace in your area, formation quality beneath your specific section, comparable lease bonuses paid on surrounding tracts, and whether the section is part of an operator's near-term drilling plan.
03
Small Fractional Interests & Inherited Positions
Often worth substantially more than expected
Many Glasscock County mineral owners hold small fractional interests inherited across multiple generations, often spread across heirs in different states. Glasscock's deep stacked pay and high operator activity mean even small fractional interests can carry meaningful value. We pay these interests the same attention as larger ones and are comfortable doing the title research, including chains that go back to original ranch deeds.
What shapes the number: net mineral acre count, royalty rate if leased, producing status, accumulated unpaid suspense (sometimes meaningful for inherited interests after operator transitions), and whether other heirs holding the same chain are also active.
04
Leased but Not Yet Producing
Valued on lease terms and proximity to activity
If your Glasscock County minerals are leased but not yet producing, value depends substantially on the lease terms and how quickly the operator is moving toward drilling. Permian leases typically have three to five year primary terms with extension by production. A lease held by an active major operator is worth materially more than one held by a passive leaseholder waiting on conditions.
What shapes the number: your royalty rate, primary term expiration, the specific operator holding the lease, recent drilling activity in adjacent spacing units, and whether your lease has a Pugh clause or similar acreage-protection language.
Your specific situation

We would rather look at real facts than speak in generalities. Send us what you have.

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06 The Regulatory Landscape

Texas rules,
Permian realities.

Glasscock County operates under the Texas oil and gas regime, administered primarily by the Texas Railroad Commission. The on-the-ground realities reflect the Texas approach to mineral rights, which tends to favor private ownership and contractual freedom, combined with the specific operator landscape and infrastructure of the southern Midland Basin core.

The Texas Railroad Commission and how spacing works

The Texas Railroad Commission (RRC) regulates oil and gas activity on private and state minerals in Texas. The RRC permits wells, conducts hearings on spacing and unitization applications, and maintains the public well database. Glasscock falls within RRC District 8, headquartered in Midland. Texas uses field rules and special field designations to govern spacing, with horizontal wells in the Spraberry (Trend Area) and Wolfcamp typically operating under their own field rules.

The post-Pioneer transition and operator changes

The 2024 acquisition of Pioneer Natural Resources by ExxonMobil reshaped the operator picture across much of the southern Midland Basin, including Glasscock. For mineral owners, this has meant administrative changes: new division order paperwork, royalty payments coming from a different source (often XTO), and in some cases temporary suspense as the new system processes existing accounts. Underlying lease terms do not change with a corporate acquisition.

Pooling and force pooling in Texas

Texas does not have broad compulsory pooling like many other states. Pooling typically requires consent in the lease itself, or voluntary agreement among mineral owners. The Mineral Interest Pooling Act provides limited statutory pooling in some circumstances, but it is used less frequently than in states like Oklahoma. For Glasscock owners, this means lease pooling clauses matter and the specific section/lease your minerals fall under affects how they participate in horizontal units.

Post-production deductions and lease language

Texas case law generally allows post-production cost deductions from royalty payments unless the lease specifically prohibits them (the Heritage v. NationsBank line of cases). Many older Glasscock leases are silent on the issue. Newer leases, particularly those negotiated by sophisticated mineral owners or counsel, often include specific cost-free or no-deductions language. Reading your specific lease's post-production cost language matters in Texas.

07 Questions We Hear Often

The real questions
mineral owners ask.

We have been through these conversations hundreds of times. Below are honest answers to the things people actually want to know.

01
How much are mineral rights worth in Glasscock County, Texas?
Glasscock County sits in the southern core of the Midland Basin, which carries some of the strongest mineral valuations in Texas because of stacked Wolfcamp and Spraberry inventory. That said, values vary widely depending on where in the county you own, whether your minerals are leased or producing, your royalty rate, the operator, and the lease cost-deduction language. The only way to know what your specific minerals are worth is to look at the actual facts. We are happy to do that for you, at no cost and with no obligation to sell.
02
Why is Glasscock County considered Midland Basin core?
Two reasons. First, the Wolfcamp and Spraberry intervals are unusually thick across Glasscock, with multiple productive benches stacked on top of each other. Second, the operator base in Glasscock is heavily weighted toward well-capitalized public companies that have drilled hundreds of horizontal wells across the county. The combination of rock quality and operator activity is what makes a county "core" rather than fringe.
03
I inherited mineral rights in Glasscock County but I do not have any documents. What do I do?
This is a common situation. Start by gathering anything you do have: old letters from operators, tax statements, probate records, royalty stubs, division orders. The Glasscock County Clerk in Garden City keeps deed records. The Texas Railroad Commission maintains a public database of wells, operators, and production. We can usually identify what someone owns with just a name and a rough idea of where the minerals are located, because Texas mineral records are publicly accessible.
04
Should I sell my Glasscock County mineral rights now or hold them?
That depends on your situation. People who hold typically want long-term royalty income, do not need cash for other priorities, and are comfortable with commodity price volatility. People who sell typically want to convert future uncertain income into certain present value, simplify their estate, or use the capital for something else. Glasscock's deep stacked-pay inventory makes the holding case strong, but the same characteristics support strong sale valuations. Neither is wrong. We can help you think through the tradeoffs without pressure to pick a side.
05
Pioneer was acquired by ExxonMobil. What does that mean for my royalties?
ExxonMobil completed the acquisition of Pioneer Natural Resources in 2024. For most royalty owners, the practical change is administrative. The operator name on division orders and royalty statements has shifted, payment systems have transitioned, and some owners have received new paperwork. The underlying lease terms do not change with a corporate acquisition. If you are seeing new statements or documents from XTO or ExxonMobil where you used to see Pioneer, that is the reason.
06
What does it mean that my minerals are in "the southern Midland Basin"?
The Midland Basin is the eastern half of the broader Permian. Within it, the southern portion (Glasscock, southern Midland, Reagan, Upton) tends to have somewhat different formation thicknesses and pressure regimes than the northern Midland Basin counties. For Glasscock specifically, the Wolfcamp and Spraberry are well-developed, and operators have drilled both intervals heavily. "Southern Midland Basin core" is shorthand for an area with strong rock and consistent activity.
07
My royalty checks have post-production cost deductions. Is that allowed in Texas?
Whether your specific lease permits which deductions depends entirely on the lease language. Texas case law generally allows post-production deductions unless the lease specifically prohibits them. Many older Glasscock leases are silent on the issue, which can lead to deductions being taken. Newer leases often have specific "no deductions" or "cost-free royalty" language. Reading your lease carefully is worth doing. We can help review your statements and lease language together if helpful.
08
Can I sell mineral rights I inherited if other family members inherited the same minerals?
Yes, you can sell your undivided fractional interest without needing the other heirs to participate. This is extremely common in Glasscock County, where many interests have been subdivided across generations of heirs, often spread across multiple states. A good buyer will work with your specific interest, not require you to round up cousins. We do this all the time.
09
How does the sale process actually work?
Step one, we do the research. You send us what you have, we pull RRC records, we check operator activity in the spacing unit, and we build an analysis. Step two, we send you a written summary with our reasoning. Step three, if you want to proceed, we handle the mineral deed preparation, you sign at a notary, and funds are wired at close. We move on your timeline, whether that is quick or deliberate. There is no charge for the research and no obligation to sell.
10
Why should I sell to Timberline Minerals specifically?
We are a family-owned office with roots in Texas and Montana. We work across the primary US basins and we are comfortable with Midland Basin specifics including the post-Pioneer/Exxon operator transition, Spraberry and Wolfcamp development patterns, and the Texas RRC permitting process. We work with mineral interests of all sizes including small fractional positions. Our process is straightforward: we research the tract, share what we find, and make an offer. The decision to sell is yours, and we are happy to help you understand what you have either way.

Find out what your
Glasscock County minerals
are actually worth.

Send us what you have, or what you think you have. We will pull RRC records, check operator activity in your section, and put together a plain-English summary with our reasoning laid out. If it makes sense to go further, we move on your timeline. If not, you have a free breakdown you can take anywhere.

Request a Valuation (512) 626-7267
Free · No Obligation · Your Timeline
08 Keep Reading

More for Glasscock County
mineral owners.

Guide · 6 min read
I inherited mineral rights. What now?
A walkthrough of the first few things to look at, whether you just found out or have been sitting on it for years.
Read the guide  →
Guide · 8 min read
How mineral rights are valued
The core inputs that go into a mineral valuation. Production, inventory, operator, lease terms, and what each one actually means in practice.
Read the guide  →
Guide · 5 min read
What to look for in an offer
Reading an offer letter, understanding what is and is not included, and the questions worth asking before responding.
Read the guide  →
Market Pulse

Permian status, April 2026

The Permian produced approximately 6.7 million barrels per day of crude oil in March 2026, the most recent month with confirmed data, accounting for roughly forty-eight percent of total US crude production. Year-over-year growth has slowed from prior peaks but remains positive. For Lea and Eddy mineral owners, the practical takeaway is that operator activity continues to be concentrated in stacked Wolfcamp and Bone Spring development across the Delaware sub-basin, with consolidation among public producers reshaping who operates which spacing units.

12 month oil production trend
6,700
thousand barrels per day
Latest month
+20(+0.3%)
thousand barrels per day
Month over month
+280(+4.4%)
thousand barrels per day
Year over year
Last updated April 2026. Source: US Energy Information Administration, Short-Term Energy Outlook (April 2026).