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Royalty Clerk

Texas oil lease · RRC district 04 · Lease 13488

Producing

KILLAM, O. W.

Killam, O. W. is an oil lease in Webb County, Texas, operated by Killam Oil Co., Ltd. in the Presa de Oro (Yegua -G-) field. The Railroad Commission shows 7,377 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 2 wells

7,377bbl oil, last 12 months+35% vs prior year
Operator
Killam Oil Co., Ltd.
County
Webb County
Field
Presa de Oro (Yegua -G-)
RRC lease
04-13488

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Where it sits

This county

Webb CountyWebbLA SalleDimmitWebb County
Webb County · RRC district 04Open Webb County →
Oil in Jul 2026
629 bbl
Reporting to the state
since Jan 2020
Wells
2
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 35% over the last 12 months

7,377 bbl in the 12 months through Jul 2026, against 5,476 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output rose 35% over the last 12 monthsMonthly oil production for KILLAM, O. W., Aug 2023 to Jul 2026. Oil output rose 35% over the last 12 months. 7,377 bbl in the 12 months through Jul 2026, against 5,476 bbl in the 12 months before.Last 12 months: 7,377 bblbbl per month02505007501,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 35% over the last 12 monthsMonthly oil production for KILLAM, O. W., Aug 2023 to Jul 2026. Oil output rose 35% over the last 12 months. 7,377 bbl in the 12 months through Jul 2026, against 5,476 bbl in the 12 months before.Last 12 monthsbbl per month02505007501,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 13488, district 04. 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.

Killam Oil Co., Ltd. has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeKillam Oil Co., Ltd., Jan 2020 to Jul 20262020202120222023202420252026Killam Oil Co., Ltd.Jan 2020 to nowthrough Jul 2026
Operators of this lease over timeKillam Oil Co., Ltd., Jan 2020 to Jul 20262020202120222023202420252026Killam Oil Co., Ltd.Jan 2020 to nowthrough Jul 2026

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

Wells

2 wells on this lease

Every well the Railroad Commission links to oil lease 13488 in district 04. The API number is the state’s ID for a well.
Wells on KILLAM, O. W.
API numberWell no.Status
42-479-4001911Active
42-479-4002010Active

SourceTexas Railroad Commission Wellbore Query, district 04, lease 13488.

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. and Valero Marketing and Supply Co. gather it.

    Gulfmark Energy, Inc. gathers it: 50% of it, on the list since Apr 1, 2012 · Valero Marketing and Supply Co. gathers it: 50% of it, on the list since Apr 1, 2012

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

640 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
21 not plugged
Horizontal
0
First completion
Feb 12, 2008
Latest permit
Nov 30, 2007
Wells and acres on the permits for Killam, O. W.
API numberWell no.Acreson the permit
42-479-4002010640
42-479-4001911640

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 KILLAM, O. W. 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 KILLAM, O. W.
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Killam Oil629628$80.46$2.89
Jun 2026Killam Oil480474$84.81$3.15
May 2026Killam Oil940936$102.13$2.94
Apr 2026Killam Oil617634$100.32$2.77
Mar 2026Killam Oil682617$91.38$3.04
Feb 2026Killam Oil588618$64.51$3.62
Jan 2026Killam Oil650783$60.04$7.72
Dec 2025Killam Oil544471$57.97$4.26
Nov 2025Killam Oil554464$60.06$3.79
Oct 2025Killam Oil568470$60.89$3.19
Sep 2025Killam Oil552618$63.96$2.97
Aug 2025Killam Oil573772$64.86$2.91
Jul 2025Killam Oil559472$68.39$3.20
Jun 2025Killam Oil503311$68.17$3.02
May 2025Killam Oil433628$62.17$3.12
Apr 2025Killam Oil368309$63.54$3.42
Mar 2025Killam Oil471617$68.24$4.12
Feb 2025Killam Oil418310$71.53$4.19
Jan 2025Killam Oil518316$75.74$4.13
Dec 2024Killam Oil215463$70.12$3.01
Nov 2024Killam Oil480318$69.95$2.12
Oct 2024Killam Oil492627$71.99$2.20
Sep 2024Killam Oil486457$70.24$2.28
Aug 2024Killam Oil533464$76.68$1.99
Jul 2024Killam Oil508610$81.80$2.07
Jun 2024Killam Oil414309$79.77$2.54
May 2024Killam Oil567615$80.02$2.12
Apr 2024Killam Oil560614$85.35$1.60
Mar 2024Killam Oil559622$81.28$1.49
Feb 2024Killam Oil527459$77.25$1.72
Jan 2024Killam Oil577623$74.15$3.18
Dec 2023Killam Oil566311$71.90$2.52
Nov 2023Killam Oil490626$77.69$2.71
Oct 2023Killam Oil562458$85.64$2.98
Sep 2023Killam Oil531664$89.43$2.64
Aug 2023Killam Oil507616$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 KILLAM, O. W.. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Killam Oil Co., Ltd.

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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

OperatorKillam Oil Co., Ltd.FieldPresa de Oro (Yegua -G-)CountyWebb County

Killam Oil Co., Ltd. in Webb County

All Killam Oil Co., Ltd. leases →

Presa de Oro (Yegua -G-) field

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

Leases within 10 km

Found by the location of their wells.

New drilling permits in Webb County

We do not have coordinates for this lease, so these are the newest permits in its county.

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 13488, district 04, 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.