Texas oil lease · RRC district 01 · Lease 17934
ProducingBROWN
Brown is an oil lease in Bexar County, Texas, operated by JM Calk Operating, LLC in the Fairfield field. The Railroad Commission shows 530 bbl of oil in the 12 months through Jun 2026.
Oil lease dossier · 5 wells
- Operator
- JM Calk Operating, LLC
- County
- Bexar County
- Field
- Fairfield
- RRC lease
- 01-17934
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Where it sits
This county
- Oil in Jun 2026
- 45 bbl
- Reporting to the state
- since Jan 2020
- Wells
- 5
- Data through
- Jun 2026
Production
Month by month, from the state record
Oil output fell 9% over the last 12 months
496 bbl in the 12 months through Jul 2026, against 547 bbl in the 12 months before. Jul 2026 was not reported. A red cross marks each one.
- Oil (bars, left axis)
- Last 12 months
SourceTexas Railroad Commission Production Data Query, oil lease 17934, district 01. Reported through Jul 2026. The state revises recent months.
Gas disposition
Where the gas went
No gas disposition reported for this lease
Operator history
Who has run this lease
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.
- JM Calk Operating, LLC May 2022 to Jun 2026
- Premier Minerals, Inc. Jan 2020 to Apr 2022
SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.
Wells
5 wells on this lease
| API number | Well no. | Status | Total depthft |
|---|---|---|---|
| 42-029-38317 | 1 | Active | – |
| 42-029-38318 | 2 | Active | – |
| 42-029-38319 | 3 | Active | – |
| 42-029-38320 | 4 | Active | – |
| 42-029-38321 | 5 | Active | – |
SourceTexas Railroad Commission Wellbore Query, district 01, lease 17934.
Estimator
Estimate your royalty for this lease
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 BROWN 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
An estimate, not your check
Ledger
36 months, newest first
| Month | Oil producedbbl | Oil soldbbl | WTI$ per bbl | Henry Hub$ per MMBtu |
|---|---|---|---|---|
| Jul 2026No report | – | – | $80.46 | $2.89 |
| Jun 2026JM Calk | 45 | 0 | $84.81 | $3.15 |
| May 2026JM Calk | 40 | 0 | $102.13 | $2.94 |
| Apr 2026JM Calk | 45 | 0 | $100.32 | $2.77 |
| Mar 2026JM Calk | 38 | 150 | $91.38 | $3.04 |
| Feb 2026JM Calk | 50 | 0 | $64.51 | $3.62 |
| Jan 2026JM Calk | 43 | 0 | $60.04 | $7.72 |
| Dec 2025JM Calk | 60 | 161 | $57.97 | $4.26 |
| Nov 2025JM Calk | 38 | 0 | $60.06 | $3.79 |
| Oct 2025JM Calk | 50 | 0 | $60.89 | $3.19 |
| Sep 2025JM Calk | 40 | 150 | $63.96 | $2.97 |
| Aug 2025JM Calk | 47 | 0 | $64.86 | $2.91 |
| Jul 2025JM Calk | 34 | 0 | $68.39 | $3.20 |
| Jun 2025JM Calk | 60 | 160 | $68.17 | $3.02 |
| May 2025JM Calk | 47 | 0 | $62.17 | $3.12 |
| Apr 2025JM Calk | 47 | 0 | $63.54 | $3.42 |
| Mar 2025JM Calk | 44 | 0 | $68.24 | $4.12 |
| Feb 2025JM Calk | 23 | 154 | $71.53 | $4.19 |
| Jan 2025JM Calk | 49 | 0 | $75.74 | $4.13 |
| Dec 2024JM Calk | 48 | 0 | $70.12 | $3.01 |
| Nov 2024JM Calk | 47 | 0 | $69.95 | $2.12 |
| Oct 2024JM Calk | 48 | 152 | $71.99 | $2.20 |
| Sep 2024JM Calk | 49 | 0 | $70.24 | $2.28 |
| Aug 2024JM Calk | 51 | 0 | $76.68 | $1.99 |
| Jul 2024JM Calk | 45 | 161 | $81.80 | $2.07 |
| Jun 2024JM Calk | 55 | 0 | $79.77 | $2.54 |
| May 2024JM Calk | 75 | 0 | $80.02 | $2.12 |
| Apr 2024JM Calk | 73 | 176 | $85.35 | $1.60 |
| Mar 2024JM Calk | 36 | 0 | $81.28 | $1.49 |
| Feb 2024JM Calk | 74 | 171 | $77.25 | $1.72 |
| Jan 2024JM Calk | 89 | 0 | $74.15 | $3.18 |
| Dec 2023JM Calk | 68 | 0 | $71.90 | $2.52 |
| Nov 2023JM Calk | 53 | 161 | $77.69 | $2.71 |
| Oct 2023JM Calk | 60 | 0 | $85.64 | $2.98 |
| Sep 2023JM Calk | 53 | 0 | $89.43 | $2.64 |
| Aug 2023JM Calk | 63 | 168 | $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).
Check your statements
Do your checks match this lease?
Upload your statements for BROWN. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask JM Calk Operating, LLC.
- A month that was never paid
- Your share of the barrels and mcf
- The price against WTI and Henry Hub
- Fees taken on gas
- Late payment interest
Around this lease
Walk the neighborhood
This lease belongs to
JM Calk Operating, LLC in Bexar County
- ERD UNIT
1,144 bbl last 12 months
- GARZA
752 bbl last 12 months
- HAECKER
207 bbl last 12 months
- SAWYER, N.C.
14 bbl last 12 months
Fairfield field
- RALPH & SONS FARMS, INC.
9,235 bbl last 12 months
- KELLER
1,382 bbl last 12 months
- ERD UNIT
1,144 bbl last 12 months
- BARRY -C-
890 bbl last 12 months
- GARZA
752 bbl last 12 months
New drilling permits in Bexar County
We do not have coordinates for this lease, so these are the newest permits in its county.
No recent drilling permits found for this area.
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 17934, 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.