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Royalty Clerk

Texas oil lease · RRC district 01 · Lease 21510

Producing

LANCASTER

Lancaster is an oil lease in Frio County, Texas, operated by Blackbrush O & G, LLC in the Lorenzo (Austin Chalk) field. The Railroad Commission shows 1,264 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 1 well

1,264bbl oil, last 12 months−69% vs prior year
Operator
Blackbrush O & G, LLC
County
Frio County
Field
Lorenzo (Austin Chalk)
RRC lease
01-21510

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Where it sits

This county

Frio CountyFrioZavalaAtascosaUvaldeMedinaBexarFrio County
Frio County · RRC district 01Open Frio County →
Oil in Jul 2026
202 bbl
Reporting to the state
since Jun 2024
Wells
1
Data through
Jul 2026

Production

Month by month, from the state record

What the Railroad Commission says this oil lease produced. Oil is in barrels (bbl). Gas is in thousand cubic feet (mcf).

Oil output fell 69% over the last 12 months

1,264 bbl in the 12 months through Jul 2026, against 4,113 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output fell 69% over the last 12 monthsMonthly oil production for LANCASTER, Jun 2024 to Jul 2026. Oil output fell 69% over the last 12 months. 1,264 bbl in the 12 months through Jul 2026, against 4,113 bbl in the 12 months before.Last 12 months: 1,264 bblbbl per month01,0002,0003,0004,000Jul 24OctJan 25AprJulOctJan 26AprJul
Oil output fell 69% over the last 12 monthsMonthly oil production for LANCASTER, Jun 2024 to Jul 2026. Oil output fell 69% over the last 12 months. 1,264 bbl in the 12 months through Jul 2026, against 4,113 bbl in the 12 months before.Last 12 monthsbbl per month01,0002,0003,0004,000Jul 24Jan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 21510, district 01. Reported through Jul 2026. The state revises recent months.

Gas disposition

Where the gas went

Every month the operator tells the state where each mcf of gas went, using a code. The code decides how your gas is paid.

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Operator history

Who has run this lease

The operator runs the wells and pays your royalty. When the operator changes, payments often slip for a month or two.

Blackbrush O & G, LLC has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeBlackbrush O & G, LLC, Jun 2024 to Jul 202620252026Blackbrush O & G, LLCJun 2024 to nowthrough Jul 2026
Operators of this lease over timeBlackbrush O & G, LLC, Jun 2024 to Jul 202620252026Blackbrush O & G, LLCJun 2024 to nowthrough Jul 2026

SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.

Wells

1 well on this lease

Every well the Railroad Commission links to oil lease 21510 in district 01. The API number is the state’s ID for a well.
Wells on LANCASTER
API numberWell no.Status
42-163-34334101HActive

SourceTexas Railroad Commission Wellbore Query, district 01, lease 21510.

Who buys and gathers

Who moves and buys this lease's production

The operator files a Form P-4 with the Railroad Commission naming the companies authorised to gather and buy the oil and gas. The buyer's price is the one your royalty is figured on.

  • Oil

    Harvest Marketing & Trading, LLC gathers it.

    100% of it, on the list since Jun 7, 2024

  • Gas from oil wells

    Targa Frio Lasalle Pipeline LP buys and gathers it.

    Targa Frio Lasalle Pipeline LP buys it: 100% of it, on the list since Jun 7, 2024 · Targa Frio Lasalle Pipeline LP gathers it: 100% of it, on the list since Jun 7, 2024

SourceRailroad Commission of Texas, Form P-4 file, dated Sep 24, 2026 (source). A listed company is authorised to move or buy the production; the state does not say what it paid.

Who buys my oil and gasIs my oil price fair?

Unit and wells

1,521.60 acres on the newest permit

Acres and wells as the operator filed them on its Railroad Commission drilling permits. Your decimal is your net acres over the unit acres, so this is the number to hold your division order against.
Wells on the permits
11 not plugged
Horizontal
1
First completion
Jun 7, 2024
Latest permit
Apr 3, 2024
Wells and acres on the permits for Lancaster
API numberWell no.Acreson the permit
42-163-34334101H1,521.60

SourceRailroad Commission of Texas, drilling permits and wellbore file, Sep 26, 2026 (source 1, source 2). The acres are what the operator filed; they are not a survey.

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Estimator

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Estimator

What could your check be?

Your decimal interest is the small number on your division order that says what share of the whole lease (8/8ths) is yours. Type it in and we apply it to what the state says LANCASTER sold each month.

For example 0.00097656, or a fraction like 1/1024.

Dollars per barrel. Your statements show the gap your operator uses. Leave 0 to price oil at WTI.

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Enter your decimal to see an estimated royalty for each of the last 12 months this lease reported. Nothing you type leaves your browser.

An estimate, not your check

It ignores gathering and processing fees, taxes, plant products and the price your operator actually gets, so your statement will differ. Use it as a ceiling to compare against.

Ledger

26 months, newest first

Compare these numbers with your statements. Your share of a month is the “Oil sold” volume times your decimal. Scroll sideways on a phone.
Monthly production, disposition and prices for LANCASTER
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Blackbrush O20213$80.46$2.89
Jun 2026Blackbrush O274379$84.81$3.15
May 2026Blackbrush O293201$102.13$2.94
Apr 2026Blackbrush O159170$100.32$2.77
Mar 2026Blackbrush O90$91.38$3.04
Feb 2026Blackbrush O00$64.51$3.62
Jan 2026Blackbrush O262345$60.04$7.72
Dec 2025Blackbrush O624$57.97$4.26
Nov 2025Blackbrush O22$60.06$3.79
Oct 2025Blackbrush O11$60.89$3.19
Sep 2025Blackbrush O00$63.96$2.97
Aug 2025Blackbrush O00$64.86$2.91
Jul 2025Blackbrush O163$68.39$3.20
Jun 2025Blackbrush O503$68.17$3.02
May 2025Blackbrush O203190$62.17$3.12
Apr 2025Blackbrush O317372$63.54$3.42
Mar 2025Blackbrush O449550$68.24$4.12
Feb 2025Blackbrush O690708$71.53$4.19
Jan 2025Blackbrush O454376$75.74$4.13
Dec 2024Blackbrush O197186$70.12$3.01
Nov 2024Blackbrush O189175$69.95$2.12
Oct 2024Blackbrush O176190$71.99$2.20
Sep 2024Blackbrush O481$70.24$2.28
Aug 2024Blackbrush O1,3241,644$76.68$1.99
Jul 2024Blackbrush O3,2623,627$81.80$2.07
Jun 2024Blackbrush O1,664879$79.77$2.54

No report filed More than 3% of gas flared

SourceVolumes: Texas Railroad Commission Production Data Query, reported through Jul 2026. Prices: EIA WTI Cushing spot and Henry Hub spot, monthly, through Aug 2026. “Gas sold” is gas sent to a transmission line (code 2) or a plant (code 3).

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Around this lease

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Everything on this page connects to the operator, field and county records. Start from any of them.

This lease belongs to

OperatorBlackbrush O & G, LLCFieldLorenzo (Austin Chalk)CountyFrio County

Blackbrush O & G, LLC in Frio County

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Lorenzo (Austin Chalk) field

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Leases within 10 km

Found by the location of their wells.

Drilling permits within 10 km

How to read this page

Questions owners ask

What is a decimal interest?

It is your share of the whole lease, written as a decimal. A 1/4 royalty on 5 net acres in a 1,280-acre unit is 1/4 × 5 ÷ 1,280 = 0.00097656. Your division order states yours.

How do I use this page to check a royalty check?

Take the “Oil sold” volume for the month the check covers and multiply it by your decimal. The answer should match the barrels on your statement. If it does not, upload the statement and we will show where the two differ.

Why is the newest month Jul 2026?

The Railroad Commission publishes production two to three months after the fact and revises recent months. We re-pull the latest three months on every update.

Does this page show what my check should be?

No. It shows what the state recorded. Prices, fees and taxes depend on your lease and on what your operator gets for the oil and gas. The estimator gives a ceiling to compare against.

Sources and method

Where these numbers come from

  • Production and disposition by month: Texas Railroad Commission Production Data Query, oil lease 21510, district 01, reported through Jul 2026.
  • Wells: Texas Railroad Commission Wellbore Query.
  • Prices: U.S. Energy Information Administration, WTI Cushing spot and Henry Hub spot, monthly.
  • Page updated Sep 28, 2026.

We show the state’s numbers as filed. Where the state has no report for a month, we say so instead of guessing.