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Royalty Clerk

Texas oil lease · RRC district 01 · Lease 16076

Producing

CALVERT

Calvert is an oil lease in Frio County, Texas, operated by Blackbrush O & G, LLC in the Pearsall (Buda, S.) field. The Railroad Commission shows 2,148 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 3 wells

2,148bbl oil, last 12 months+4% vs prior year
Operator
Blackbrush O & G, LLC
County
Frio County
Field
Pearsall (Buda, S.)
RRC lease
01-16076

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Where it sits

This county

Frio CountyFrioZavalaAtascosaUvaldeMedinaBexarFrio County
Frio County · RRC district 01Open Frio County →
Gas, last 12 months
25,483 mcf
Oil in Jul 2026
89 bbl
Reporting to the state
since Jan 2020
Wells
3

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 rose 4% over the last 12 months

2,148 bbl in the 12 months through Jul 2026, against 2,061 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Gas (line, right axis)
  • Last 12 months
Oil output rose 4% over the last 12 monthsMonthly oil production and gas for CALVERT, Aug 2023 to Jul 2026. Oil output rose 4% over the last 12 months. 2,148 bbl in the 12 months through Jul 2026, against 2,061 bbl in the 12 months before.Last 12 months: 2,148 bblbbl per monthmcf per month001001,0002002,0003003,0004004,0005005,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 4% over the last 12 monthsMonthly oil production and gas for CALVERT, Aug 2023 to Jul 2026. Oil output rose 4% over the last 12 months. 2,148 bbl in the 12 months through Jul 2026, against 2,061 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001001,0002002,0003003,0004004,0005005,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 16076, 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.

Since Jan 2026 the lease's gas goes to a processing plant instead of a transmission line

Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 100.0% of the gas in Feb 2024.

  • Processing plant (3)
  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
Since Jan 2026 the lease's gas goes to a processing plant instead of a transmission lineShare of CALVERT gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2026 the lease's gas goes to a processing plant instead of a transmission line. Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 100.0% of the gas in Feb 2024.Share of the lease’s gas by disposition code, per month0%50%100%Jan 2026: line to plantFlared 100.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Jan 2026 the lease's gas goes to a processing plant instead of a transmission lineShare of CALVERT gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2026 the lease's gas goes to a processing plant instead of a transmission line. Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 100.0% of the gas in Feb 2024.Share of gas by disposition code0%50%100%Jan 26: line to plantFlared 100.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 16076, district 01. Reported through Jul 2026.

Processing plant (3)

Sent to a gas plant that pulls out natural gas liquids. Your statement should show plant products, and may show processing fees.

Transmission line (2)

Sold straight into a pipeline without processing. Processing fees on your statement would be worth asking about.

Lease fuel (1)

Burned to run equipment on the lease. Not sold, so it pays no royalty. A few percent is normal.

Flared (4)

Burned off or vented, not sold. It pays no royalty. More than 3% in a month is worth watching.

Over the last 12 months, 14.0% of the gas was flared. 26 months went above 3%, which we mark in the ledger below.

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, Jan 2020 to Jul 20262020202120222023202420252026Blackbrush O & G, LLCJan 2020 to nowthrough Jul 2026
Operators of this lease over timeBlackbrush O & G, LLC, Jan 2020 to Jul 20262020202120222023202420252026Blackbrush O & G, LLCJan 2020 to nowthrough Jul 2026

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

Wells

3 wells on this lease

Every well the Railroad Commission links to oil lease 16076 in district 01. The API number is the state’s ID for a well.
Wells on CALVERT
API numberWell no.Status
42-163-334741HActive
42-163-335132HActive
42-163-335663HActive

SourceTexas Railroad Commission Wellbore Query, district 01, lease 16076.

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

    Enterprise Crude Oil LLC and Harvest Marketing & Trading, LLC gather it.

    Enterprise Crude Oil LLC gathers it: 50% of it, on the list since Aug 1, 2023 · Harvest Marketing & Trading, LLC gathers it: 50% of it, on the list since Aug 1, 2023

  • 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 Aug 1, 2023 · Targa Frio Lasalle Pipeline LP gathers it: 100% of it, on the list since Aug 1, 2023

Companies that used to be listed: Enterprise Crude Oil LLC (gathers it, until Aug 1, 2023); Harvest Marketing & Trading, LLC (gathers it, until Apr 1, 2023); Shell Trading (Us) Company (gathers it, until Dec 1, 2022); Frio Lasalle Pipeline, LP (gathers it, until Feb 1, 2022); Bp Energy Co. (buys it, until Feb 1, 2022).

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

2,018.48 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
33 not plugged
Horizontal
3
First completion
Aug 1, 2011
Latest permit
Feb 8, 2012
Wells and acres on the permits for Calvert
API numberWell no.Acreson the permit
42-163-335663H2,018.48
42-163-335132H2,018.48
42-163-334741H2,018.48

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

Estimate your royalty for this lease

A rough check before you look at a statement: the state volumes times your decimal, priced at WTI and Henry Hub.

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 CALVERT 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.

Your estimate appears here

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. Regional gas prices are often below Henry Hub.

Ledger

36 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 CALVERT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026Blackbrush O890837190647$80.46$2.89
Jun 2026Blackbrush O9902,7471,3501,397$84.81$3.15
May 2026Blackbrush O15101,3461,32620$102.13$2.94
Apr 2026Blackbrush O1421181,6341,6295$100.32$2.77
Mar 2026Blackbrush O2524952,5792,5790$91.38$3.04
Feb 2026Blackbrush O2601642,7051,9230$64.51$3.62
Jan 2026Blackbrush O3091662,9522,434518$60.04$7.72
Dec 2025Blackbrush O1571501,6691,63930$57.97$4.26
Nov 2025Blackbrush O1241742,4002,4000$60.06$3.79
Oct 2025Blackbrush O1941831,7241,70321$60.89$3.19
Sep 2025Blackbrush O2253593,1652,959206$63.96$2.97
Aug 2025Blackbrush O1461711,725996729$64.86$2.91
Jul 2025Blackbrush O12401,3491881,161$68.39$3.20
Jun 2025Blackbrush O14402,3481,850498$68.17$3.02
May 2025Blackbrush O2073402,1571,763394$62.17$3.12
Apr 2025Blackbrush O8901,5541,092462$63.54$3.42
Mar 2025Blackbrush O1223691,7151,136579$68.24$4.12
Feb 2025Blackbrush O13102,2741,292982$71.53$4.19
Jan 2025Blackbrush O2111812,8081,3141,494$75.74$4.13
Dec 2024Blackbrush O2083502,5369511,585$70.12$3.01
Nov 2024Blackbrush O1951761,08241,078$69.95$2.12
Oct 2024Blackbrush O20101,8774531,424$71.99$2.20
Sep 2024Blackbrush O2283461,9581,383575$70.24$2.28
Aug 2024Blackbrush O2011831,7431,7367$76.68$1.99
Jul 2024Blackbrush O2013622,1191,611508$81.80$2.07
Jun 2024Blackbrush O4381672,6312,239392$79.77$2.54
May 2024Blackbrush O1674592,2972,037260$80.02$2.12
Apr 2024Blackbrush O18503,1532,595558$85.35$1.60
Mar 2024Blackbrush O1751832,2791,2261,053$81.28$1.49
Feb 2024Blackbrush O2073743660366$77.25$1.72
Jan 2024Blackbrush O19702,9731,6701,303$74.15$3.18
Dec 2023Blackbrush O2433312,2561,599657$71.90$2.52
Nov 2023Blackbrush O2103353,2301,7071,523$77.69$2.71
Oct 2023Blackbrush O24404,1882,4671,721$85.64$2.98
Sep 2023Blackbrush O2453563,0773,02453$89.43$2.64
Aug 2023Blackbrush O1963244,2164,116100$81.39$2.58

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, LLCFieldPearsall (Buda, S.)CountyFrio County

Blackbrush O & G, LLC in Frio County

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Pearsall (Buda, S.) field

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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 16076, 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.