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Royalty Clerk

Texas oil lease · RRC district 01 · Lease 17671

Producing

ERD UNIT

Erd Unit is an oil lease in Bexar County, Texas, operated by JM Calk Operating, LLC in the Fairfield field. The Railroad Commission shows 1,144 bbl of oil in the 12 months through Jun 2026.

Oil lease dossier · 8 wells

1,144bbl oil, last 12 months+45% vs prior year
Operator
JM Calk Operating, LLC
County
Bexar County
Field
Fairfield
RRC lease
01-17671

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Where it sits

This county

Bexar CountyBexarWilsonComalMedinaKendallHaysGuadalupeBanderaBexar County
Bexar County · RRC district 01Open Bexar County →
Oil in Jun 2026
118 bbl
Reporting to the state
since Jan 2020
Wells
8
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 rose 45% over the last 12 months

1,071 bbl in the 12 months through Jul 2026, against 737 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 rose 45% over the last 12 monthsMonthly oil production for ERD UNIT, Aug 2023 to Jul 2026. Oil output rose 45% over the last 12 months. 1,071 bbl in the 12 months through Jul 2026, against 737 bbl in the 12 months before.Last 12 months: 1,071 bblbbl per month050100150200Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 45% over the last 12 monthsMonthly oil production for ERD UNIT, Aug 2023 to Jul 2026. Oil output rose 45% over the last 12 months. 1,071 bbl in the 12 months through Jul 2026, against 737 bbl in the 12 months before.Last 12 monthsbbl per month050100150200Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 17671, 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.

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 May 2022

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 timePremier Minerals, Inc., Jan 2020 to Apr 2022; JM Calk Operating, LLC, May 2022 to Jun 20262020202120222023202420252026Changed May 2022Premier Minerals, Inc.Jan 2020 to Apr 2022JM Calk Operating, LLCMay 2022 to now
Operators of this lease over timePremier Minerals, Inc., Jan 2020 to Apr 2022; JM Calk Operating, LLC, May 2022 to Jun 20262020202120222023202420252026Changed May 2022Premier Minerals, Inc.Jan 2020 to Apr 2022JM Calk Operating, LLCMay 2022 to now

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

Wells

8 wells on this lease

Every well the Railroad Commission links to oil lease 17671 in district 01. The API number is the state’s ID for a well.
Wells on ERD UNIT
API numberWell no.Status
42-029-382961Shut-in
42-029-382972Shut-in
42-029-382983Shut-in
42-029-382994Shut-in
42-029-383005Shut-in
42-029-383049Shut-in
42-029-3830510Shut-in
42-029-3830611Shut-in

SourceTexas Railroad Commission Wellbore Query, district 01, lease 17671.

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

    Plains Marketing, L.p. gathers it.

    100% of it, on the list since Sep 1, 2024

Companies that used to be listed: Apricus Enterprises, LLC (gathers it, until Sep 1, 2024); Texican Crude&hydrocarbons, LLC (gathers it, until Apr 1, 2023); Buckhead Midstream, LLC (gathers it, until May 1, 2021); Enterprise Crude Oil LLC (gathers it, until Sep 1, 2019); Trafigura Trading LLC (gathers it, until Jul 1, 2019).

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

23.28 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
88 not plugged
Horizontal
0
First completion
Sep 27, 2013
Latest permit
Dec 18, 2013

The wells on this lease state different acreage

The permits state between 23.28 and 28.09 acres. Use the acres from your own division order for the well you are paid on.

8 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 Erd Unit
API numberWell no.Acreson the permit
42-029-38304923.28
42-029-383051023.28
42-029-383061123.28
42-029-38296128.09
42-029-38297228.09
42-029-38298328.09
42-029-38299428.09
42-029-38300528.09

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 ERD UNIT 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 ERD UNIT
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026No report––$80.46$2.89
Jun 2026JM Calk1180$84.81$3.15
May 2026JM Calk111150$102.13$2.94
Apr 2026JM Calk110155$100.32$2.77
Mar 2026JM Calk121150$91.38$3.04
Feb 2026JM Calk1100$64.51$3.62
Jan 2026JM Calk35155$60.04$7.72
Dec 2025JM Calk198150$57.97$4.26
Nov 2025JM Calk370$60.06$3.79
Oct 2025JM Calk10597$60.89$3.19
Sep 2025JM Calk5494$63.96$2.97
Aug 2025JM Calk720$64.86$2.91
Jul 2025JM Calk73101$68.39$3.20
Jun 2025JM Calk79100$68.17$3.02
May 2025JM Calk82105$62.17$3.12
Apr 2025JM Calk7496$63.54$3.42
Mar 2025JM Calk9497$68.24$4.12
Feb 2025JM Calk8597$71.53$4.19
Jan 2025JM Calk620$75.74$4.13
Dec 2024JM Calk6547$70.12$3.01
Nov 2024JM Calk31144$69.95$2.12
Oct 2024JM Calk380$71.99$2.20
Sep 2024JM Calk380$70.24$2.28
Aug 2024JM Calk160$76.68$1.99
Jul 2024JM Calk00$81.80$2.07
Jun 2024JM Calk76160$79.77$2.54
May 2024JM Calk670$80.02$2.12
Apr 2024JM Calk400$85.35$1.60
Mar 2024JM Calk100$81.28$1.49
Feb 2024JM Calk39161$77.25$1.72
Jan 2024JM Calk450$74.15$3.18
Dec 2023JM Calk390$71.90$2.52
Nov 2023JM Calk370$77.69$2.71
Oct 2023JM Calk47181$85.64$2.98
Sep 2023JM Calk480$89.43$2.64
Aug 2023JM Calk720$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 ERD UNIT. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask JM Calk Operating, 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

OperatorJM Calk Operating, LLCFieldFairfieldCountyBexar County

JM Calk Operating, LLC in Bexar County

All JM Calk Operating, LLC leases →

Fairfield field

All leases in this field →

Leases within 10 km

Found by the location of their wells.

  • MILLER

    160 bbl last 12 months · 0.3 km away

  • BARLITE, INC.

    66 bbl last 12 months · 0.6 km away

  • MCDANIEL

    0 bbl last 12 months · 0.6 km away

  • GARZA (R)

    265 bbl last 12 months · 0.7 km away

  • POPE

    55 bbl last 12 months · 0.8 km away

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 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 17671, 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.