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Royalty Clerk

Texas oil lease · RRC district 04 · Lease 13657

Producing

CUELLAR, E.

Cuellar, E. is an oil lease in Zapata County, Texas, operated by RMX Oil & Gas, LLC in the Jennings, W. (3000 Sand) field. The Railroad Commission shows 1,234 bbl of oil in the 12 months through Jun 2026.

Oil lease dossier · 10 wells

1,234bbl oil, last 12 months−45% vs prior year
Operator
RMX Oil & Gas, LLC
County
Zapata County
Field
Jennings, W. (3000 Sand)
RRC lease
04-13657

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Where it sits

This county

Zapata CountyZapataJim HoggZapata County
Zapata County · RRC district 04Open Zapata County →
Oil in Jun 2026
124 bbl
Reporting to the state
since Jan 2020
Wells
10
Data through
Jun 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 45% over the last 12 months

1,054 bbl in the 12 months through Jul 2026, against 1,909 bbl in the 12 months before. Jul 2026 was not reported. A red cross marks each one.

  • Oil (bars, left axis)
  • Last 12 months
Oil output fell 45% over the last 12 monthsMonthly oil production for CUELLAR, E., Aug 2023 to Jul 2026. Oil output fell 45% over the last 12 months. 1,054 bbl in the 12 months through Jul 2026, against 1,909 bbl in the 12 months before.Last 12 months: 1,054 bblbbl per month050100150200250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 45% over the last 12 monthsMonthly oil production for CUELLAR, E., Aug 2023 to Jul 2026. Oil output fell 45% over the last 12 months. 1,054 bbl in the 12 months through Jul 2026, against 1,909 bbl in the 12 months before.Last 12 monthsbbl per month050100150200250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 13657, 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.

The operator changed once, most recently in Apr 2024

If your statements skip or shrink around a change, ask the new operator's owner relations department whether the month is in suspense.

Operators of this lease over timeOutline Oil Company LLC, Jan 2020 to Mar 2024; RMX Oil & Gas, LLC, Apr 2024 to Jun 20262020202120222023202420252026Changed Apr 2024Outline Oil Company LLCJan 2020 to Mar 2024RMX Oil & Gas, LLCApr 2024 to now
Operators of this lease over timeOutline Oil Company LLC, Jan 2020 to Mar 2024; RMX Oil & Gas, LLC, Apr 2024 to Jun 20262020202120222023202420252026Changed Apr 2024Outline Oil Company LLCJan 2020 to Mar 2024RMX Oil & Gas, LLCApr 2024 to now

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

Wells

10 wells on this lease

Every well the Railroad Commission links to oil lease 13657 in district 04. The API number is the state’s ID for a well.
Wells on CUELLAR, E.
API numberWell no.Status
42-505-0069013Shut-in
42-505-0069316Active
42-505-0069922Active
42-505-0070124Active
42-505-0070225Active
42-505-0070327Shut-in
42-505-0070428Active
42-505-0070530Active
42-505-0300229Active
42-505-3027332Active

SourceTexas Railroad Commission Wellbore Query, district 04, lease 13657.

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

    Texas Oil Purchasing LLC gathers it.

    100% of it, on the list since Feb 15, 2026

Companies that used to be listed: Dorado Oil Company (gathers it, until Feb 15, 2026); Maxim Crude Oil, L.l.c. (gathers it, until Jan 1, 2025).

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
1010 not plugged
Horizontal
0
First completion
Mar 20, 1957
Latest permit
Oct 18, 1979

10 wells are listed on this lease

Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

Wells and acres on the permits for Cuellar, E.
API numberWell no.Acreson the permit
42-505-0069316640
42-505-0069013–
42-505-0069922–
42-505-0070124–
42-505-0070225–
42-505-0070327–
42-505-0070428–
42-505-0070530–
42-505-0300229–
42-505-3027332–

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 CUELLAR, E. 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 CUELLAR, E.
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026No report––$80.46$2.89
Jun 2026RMX Oil124169$84.81$3.15
May 2026RMX Oil96179$102.13$2.94
Apr 2026RMX Oil510$100.32$2.77
Mar 2026RMX Oil720$91.38$3.04
Feb 2026RMX Oil54165$64.51$3.62
Jan 2026RMX Oil370$60.04$7.72
Dec 2025RMX Oil320$57.97$4.26
Nov 2025RMX Oil100180$60.06$3.79
Oct 2025RMX Oil1290$60.89$3.19
Sep 2025RMX Oil181180$63.96$2.97
Aug 2025RMX Oil178180$64.86$2.91
Jul 2025RMX Oil180173$68.39$3.20
Jun 2025RMX Oil182180$68.17$3.02
May 2025RMX Oil175180$62.17$3.12
Apr 2025RMX Oil170180$63.54$3.42
Mar 2025RMX Oil240363$68.24$4.12
Feb 2025RMX Oil1200$71.53$4.19
Jan 2025RMX Oil100182$75.74$4.13
Dec 2024RMX Oil1000$70.12$3.01
Nov 2024RMX Oil165164$69.95$2.12
Oct 2024RMX Oil162165$71.99$2.20
Sep 2024RMX Oil160160$70.24$2.28
Aug 2024RMX Oil155160$76.68$1.99
Jul 2024RMX Oil150160$81.80$2.07
Jun 2024RMX Oil160165$79.77$2.54
May 2024RMX Oil170164$80.02$2.12
Apr 2024RMX Oil170165$85.35$1.60
Mar 2024Outline Oil170164$81.28$1.49
Feb 2024Outline Oil170165$77.25$1.72
Jan 2024Outline Oil170165$74.15$3.18
Dec 2023Outline Oil170165$71.90$2.52
Nov 2023Outline Oil80160$77.69$2.71
Oct 2023Outline Oil800$85.64$2.98
Sep 2023Outline Oil70160$89.43$2.64
Aug 2023Outline Oil600$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 CUELLAR, E.. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask RMX Oil & Gas, LLC.

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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

OperatorRMX Oil & Gas, LLCFieldJennings, W. (3000 Sand)CountyZapata County

RMX Oil & Gas, LLC in Zapata County

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

Jennings, W. (3000 Sand) field

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

Leases within 10 km

Found by the location of their wells.

  • JENNINGS

    2,117 mcf last 12 months · 1.2 km away

  • JENNINGS

    32,424 mcf last 12 months · 1.9 km away

  • JENNINGS

    7,567 mcf last 12 months · 1.9 km away

  • JENNINGS

    0 mcf last 12 months · 2.5 km away

  • JENNINGS RANCH D

    44,723 mcf last 12 months · 2.6 km away

New drilling permits in Zapata 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 Jun 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 13657, 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.