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Royalty Clerk

Texas oil lease · RRC district 7B · Lease 11591

Producing

SHAFFER, M. C. 155

Shaffer, M. C. 155 is an oil lease in Taylor County, Texas, operated by Bustamante Oil Company in the Taylor County Regular field. The Railroad Commission shows 767 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 3 wells

767bbl oil, last 12 months+8% vs prior year
Operator
Bustamante Oil Company
County
Taylor County
Field
Taylor County Regular
RRC lease
7B-11591

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Where it sits

This county

Taylor CountyTaylorShackelfordFisherNolanCallahanJonesCokeTaylor County
Taylor County · RRC district 7BOpen Taylor County →
Oil in Jul 2026
40 bbl
Reporting to the state
since Jan 2020
Wells
3
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 8% over the last 12 months

767 bbl in the 12 months through Jul 2026, against 711 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output rose 8% over the last 12 monthsMonthly oil production for SHAFFER, M. C. 155, Aug 2023 to Jul 2026. Oil output rose 8% over the last 12 months. 767 bbl in the 12 months through Jul 2026, against 711 bbl in the 12 months before.Last 12 months: 767 bblbbl per month050100150200Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 8% over the last 12 monthsMonthly oil production for SHAFFER, M. C. 155, Aug 2023 to Jul 2026. Oil output rose 8% over the last 12 months. 767 bbl in the 12 months through Jul 2026, against 711 bbl in the 12 months before.Last 12 monthsbbl per month050100150200Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 11591, district 7B. 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 2 times, most recently in Jul 2026

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 timeRobertson Resources, Inc., Jan 2020 to Jun 2025; Bustamante Resources LLC, Jul 2025 to Jun 2026; Bustamante Oil Company, Jul 2026 to Jul 20262020202120222023202420252026Changed Jul 2025Changed Jul 2026Robertson Resources, Inc.Jan 2020 to Jun 2025Bustamante Resources LLCJul 2025 to Jun 2026Bustamante Oil CompanyJul 2026 to now
Operators of this lease over timeRobertson Resources, Inc., Jan 2020 to Jun 2025; Bustamante Resources LLC, Jul 2025 to Jun 2026; Bustamante Oil Company, Jul 2026 to Jul 20262020202120222023202420252026Changed Jul 2025Changed Jul 2026Robertson Resources, Inc.Jan 2020 to Jun 2025Bustamante Resources LLCJul 2025 to Jun 2026Bustamante Oil CompanyJul 2026 to now

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 11591 in district 7B. The API number is the state’s ID for a well.
Wells on SHAFFER, M. C. 155
API numberWell no.Status
42-441-302801Active
42-441-303142Active
42-441-306694Active

SourceTexas Railroad Commission Wellbore Query, district 7B, lease 11591.

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

    Bml, Inc. B gathers it.

    100% of it, on the list since Dec 1, 2016

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
31 not plugged
Horizontal
0
First completion
Sep 17, 1971
Latest permit
–
Wells and acres on the permits for Shaffer, M. C. 155
API numberWell no.Acreson the permit
42-441-302801–
42-441-303142–
42-441-306694–

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 SHAFFER, M. C. 155 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 SHAFFER, M. C. 155
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Bustamante Oil400$80.46$2.89
Jun 2026Bustamante Resources470$84.81$3.15
May 2026Bustamante Resources440$102.13$2.94
Apr 2026Bustamante Resources420$100.32$2.77
Mar 2026Bustamante Resources400$91.38$3.04
Feb 2026Bustamante Resources480$64.51$3.62
Jan 2026Bustamante Resources500$60.04$7.72
Dec 2025Bustamante Resources660$57.97$4.26
Nov 2025Bustamante Resources820$60.06$3.79
Oct 2025Bustamante Resources800$60.89$3.19
Sep 2025Bustamante Resources166142$63.96$2.97
Aug 2025Bustamante Resources62167$64.86$2.91
Jul 2025Bustamante Resources1000$68.39$3.20
Jun 2025Robertson Resources,102162$68.17$3.02
May 2025Robertson Resources,102169$62.17$3.12
Apr 2025Robertson Resources,1100$63.54$3.42
Mar 2025Robertson Resources,90172$68.24$4.12
Feb 2025Robertson Resources,850$71.53$4.19
Jan 2025Robertson Resources,41174$75.74$4.13
Dec 2024Robertson Resources,140$70.12$3.01
Nov 2024Robertson Resources,10174$69.95$2.12
Oct 2024Robertson Resources,220$71.99$2.20
Sep 2024Robertson Resources,250$70.24$2.28
Aug 2024Robertson Resources,100$76.68$1.99
Jul 2024Robertson Resources,360$81.80$2.07
Jun 2024Robertson Resources,1270$79.77$2.54
May 2024Robertson Resources,82167$80.02$2.12
Apr 2024Robertson Resources,910$85.35$1.60
Mar 2024Robertson Resources,88171$81.28$1.49
Feb 2024Robertson Resources,940$77.25$1.72
Jan 2024Robertson Resources,66125$74.15$3.18
Dec 2023Robertson Resources,1000$71.90$2.52
Nov 2023Robertson Resources,102170$77.69$2.71
Oct 2023Robertson Resources,710$85.64$2.98
Sep 2023Robertson Resources,67169$89.43$2.64
Aug 2023Robertson Resources,850$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 SHAFFER, M. C. 155. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Bustamante Oil Company.

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Around this lease

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This lease belongs to

OperatorBustamante Oil CompanyFieldTaylor County RegularCountyTaylor County

Bustamante Oil Company in Taylor County

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Taylor County Regular 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 11591, district 7B, 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.

FAQ

Questions about SHAFFER, M. C. 155

Who operates the SHAFFER, M. C. 155 lease?

The Railroad Commission lists Bustamante Oil Company (operator number 112685) as the operator of this lease in Taylor County, Texas. The operator history on this page shows earlier operators and when the record changed.

How much has the SHAFFER, M. C. 155 lease produced?

The lease reported 767 bbl of oil in the last 12 months through Jul 2026. Monthly figures for 36 months are in the ledger on this page, taken from the Railroad Commission's production data.

Does this page show who owns the royalty?

No. Railroad Commission records show who operates a lease and what it reported, not who owns the minerals or receives royalty. Your division order and royalty stub name the lease and your decimal interest.

How do I check my royalty stub against this lease?

Multiply the lease's volume for a month by your decimal interest and compare it with the barrels and mcf on your stub for the same month. The two are seldom identical, since sales and reporting months can differ, but a large gap is worth a question to the operator.

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