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Royalty Clerk

Texas oil lease · RRC district 03 · Lease 09638

Producing

DUFFY -A-

Duffy -A- is an oil lease in Wharton County, Texas, operated by Dewbre Petroleum Corporation in the Duffy, South (6980) field. The Railroad Commission shows 3,719 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 1 well

3,719bbl oil, last 12 months+67% vs prior year
Operator
Dewbre Petroleum Corporation
County
Wharton County
Field
Duffy, South (6980)
RRC lease
03-09638

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Where it sits

This county

Wharton CountyWhartonLavacaFayetteAustinColoradoFort BendJacksonWharton County
Wharton County · RRC district 03Open Wharton County →
Oil in Jul 2026
586 bbl
Reporting to the state
since Jan 2020
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 rose 67% over the last 12 months

3,719 bbl in the 12 months through Jul 2026, against 2,227 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output rose 67% over the last 12 monthsMonthly oil production for DUFFY -A-, Aug 2023 to Jul 2026. Oil output rose 67% over the last 12 months. 3,719 bbl in the 12 months through Jul 2026, against 2,227 bbl in the 12 months before.Last 12 months: 3,719 bblbbl per month0200400600800Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 67% over the last 12 monthsMonthly oil production for DUFFY -A-, Aug 2023 to Jul 2026. Oil output rose 67% over the last 12 months. 3,719 bbl in the 12 months through Jul 2026, against 2,227 bbl in the 12 months before.Last 12 monthsbbl per month0200400600800Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 09638, district 03. 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.

Dewbre Petroleum Corporation has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeDewbre Petroleum Corporation, Jan 2020 to Jul 20262020202120222023202420252026Dewbre Petroleum CorporationJan 2020 to nowthrough Jul 2026
Operators of this lease over timeDewbre Petroleum Corporation, Jan 2020 to Jul 20262020202120222023202420252026Dewbre Petroleum CorporationJan 2020 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 09638 in district 03. The API number is the state’s ID for a well.
Wells on DUFFY -A-
API numberWell no.Status
42-481-034412Active

SourceTexas Railroad Commission Wellbore Query, district 03, lease 09638.

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

    Gulfmark Energy, Inc. gathers it.

    100% of it, on the list since Feb 1, 2018

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

What the drilling permits say

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
21 not plugged
Horizontal
0
First completion
Apr 2, 1964
Latest permit
–
Wells and acres on the permits for Duffy -A-
API numberWell no.Acreson the permit
42-481-02392A 1–
42-481-034412–

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.

Check my decimal against the unit

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 DUFFY -A- 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.

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 DUFFY -A-
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Dewbre Petroleum586712$80.46$2.89
Jun 2026Dewbre Petroleum592534$84.81$3.15
May 2026Dewbre Petroleum325355$102.13$2.94
Apr 2026Dewbre Petroleum215180$100.32$2.77
Mar 2026Dewbre Petroleum169179$91.38$3.04
Feb 2026Dewbre Petroleum860$64.51$3.62
Jan 2026Dewbre Petroleum101168$60.04$7.72
Dec 2025Dewbre Petroleum224173$57.97$4.26
Nov 2025Dewbre Petroleum362526$60.06$3.79
Oct 2025Dewbre Petroleum680535$60.89$3.19
Sep 2025Dewbre Petroleum379353$63.96$2.97
Aug 2025Dewbre Petroleum00$64.86$2.91
Jul 2025Dewbre Petroleum181346$68.39$3.20
Jun 2025Dewbre Petroleum275170$68.17$3.02
May 2025Dewbre Petroleum151171$62.17$3.12
Apr 2025Dewbre Petroleum470$63.54$3.42
Mar 2025Dewbre Petroleum140187$68.24$4.12
Feb 2025Dewbre Petroleum201175$71.53$4.19
Jan 2025Dewbre Petroleum230352$75.74$4.13
Dec 2024Dewbre Petroleum236170$70.12$3.01
Nov 2024Dewbre Petroleum251179$69.95$2.12
Oct 2024Dewbre Petroleum288357$71.99$2.20
Sep 2024Dewbre Petroleum202178$70.24$2.28
Aug 2024Dewbre Petroleum250$76.68$1.99
Jul 2024Dewbre Petroleum22173$81.80$2.07
Jun 2024Dewbre Petroleum229172$79.77$2.54
May 2024Dewbre Petroleum299182$80.02$2.12
Apr 2024Dewbre Petroleum169179$85.35$1.60
Mar 2024Dewbre Petroleum235179$81.28$1.49
Feb 2024Dewbre Petroleum236350$77.25$1.72
Jan 2024Dewbre Petroleum267178$74.15$3.18
Dec 2023Dewbre Petroleum184172$71.90$2.52
Nov 2023Dewbre Petroleum199355$77.69$2.71
Oct 2023Dewbre Petroleum238178$85.64$2.98
Sep 2023Dewbre Petroleum227171$89.43$2.64
Aug 2023Dewbre Petroleum245341$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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Upload your statements for DUFFY -A-. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Dewbre Petroleum Corporation.

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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

OperatorDewbre Petroleum CorporationFieldDuffy, South (6980)CountyWharton County

Dewbre Petroleum Corporation in Wharton County

No other producing leases from this operator in this county are in our data yet.

Duffy, South (6980) field

No other producing leases in this field are in our data yet.

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 09638, district 03, 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.