Texas oil lease · RRC district 01 · Lease 18398
ProducingKM-MILLER UNIT ZAV
KM-Miller Unit Zav is an oil lease in Zavala County, Texas, operated by Exco Operating Company, LP in the Briscoe Ranch (Eagleford) field. The Railroad Commission shows 51,153 bbl of oil in the 12 months through Jul 2026.
Oil lease dossier · 4 wells
- Operator
- Exco Operating Company, LP
- County
- Zavala County
- RRC lease
- 01-18398
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Where it sits
This county
- Gas, last 12 months
- 27,891 mcf
- Oil in Jul 2026
- 4,338 bbl
- Reporting to the state
- since Jan 2020
- Wells
- 4
Production
Month by month, from the state record
Oil output fell 18% over the last 12 months
51,153 bbl in the 12 months through Jul 2026, against 62,478 bbl in the 12 months before.
- Oil (bars, left axis)
- Gas (line, right axis)
- Last 12 months
SourceTexas Railroad Commission Production Data Query, oil lease 18398, district 01. Reported through Jul 2026. The state revises recent months.
Gas disposition
Where the gas went
91% of the gas went to a transmission line in the last 12 months
Flaring peaked at 16.4% of the gas in Jun 2026.
- Transmission line (2)
- Lease fuel (1)
- Flared (4)
SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 18398, district 01. Reported through Jul 2026.
Transmission line (2)
Sold straight into a pipeline without processing. Processing fees on your statement would be worth asking about.
Lease fuel (1)
Burned to run equipment on the lease. Not sold, so it pays no royalty. A few percent is normal.
Flared (4)
Burned off or vented, not sold. It pays no royalty. More than 3% in a month is worth watching.
Over the last 12 months, 2.3% of the gas was flared. 4 months went above 3%, which we mark in the ledger below.
Operator history
Who has run this lease
Exco Operating Company, LP has reported this lease for the whole period
No change of operator in the months we hold.
- Exco Operating Company, LP Jan 2020 to now
SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.
Wells
4 wells on this lease
| API number | Well no. | Status | Total depthft |
|---|---|---|---|
| 42-507-33234 | 1H | Active | – |
| 42-507-33235 | 2H | Active | – |
| 42-507-33236 | 3H | Active | – |
| 42-507-33237 | 4H | Active | – |
SourceTexas Railroad Commission Wellbore Query, district 01, lease 18398.
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 KM-MILLER UNIT ZAV 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 | Gas producedmcf | Gas soldmcf, codes 2+3 | Flaredmcf, code 4 | WTI$ per bbl | Henry Hub$ per MMBtu |
|---|---|---|---|---|---|---|---|
| Jul 2026Exco Operating | 4,338 | 4,338 | 2,774 | 2,463 | 0 | $80.46 | $2.89 |
| Jun 2026Exco Operating | 3,966 | 3,966 | 2,694 | 1,937 | 441 | $84.81 | $3.15 |
| May 2026Exco Operating | 4,140 | 4,140 | 2,656 | 2,322 | 0 | $102.13 | $2.94 |
| Apr 2026Exco Operating | 3,915 | 3,915 | 2,704 | 2,343 | 151 | $100.32 | $2.77 |
| Mar 2026Exco Operating | 4,234 | 4,234 | 1,985 | 1,919 | 0 | $91.38 | $3.04 |
| Feb 2026Exco Operating | 3,906 | 3,906 | 2,090 | 2,026 | 0 | $64.51 | $3.62 |
| Jan 2026Exco Operating | 4,741 | 4,741 | 2,328 | 2,264 | 0 | $60.04 | $7.72 |
| Dec 2025Exco Operating | 4,491 | 4,491 | 1,845 | 1,781 | 0 | $57.97 | $4.26 |
| Nov 2025Exco Operating | 3,802 | 3,802 | 1,565 | 1,503 | 0 | $60.06 | $3.79 |
| Oct 2025Exco Operating | 4,384 | 4,384 | 2,271 | 2,207 | 0 | $60.89 | $3.19 |
| Sep 2025Exco Operating | 4,413 | 4,413 | 2,509 | 2,316 | 50 | $63.96 | $2.97 |
| Aug 2025Exco Operating | 4,823 | 4,823 | 2,470 | 2,318 | 0 | $64.86 | $2.91 |
| Jul 2025Exco Operating | 4,952 | 4,952 | 2,442 | 2,338 | 0 | $68.39 | $3.20 |
| Jun 2025Exco Operating | 5,019 | 5,019 | 2,511 | 2,410 | 0 | $68.17 | $3.02 |
| May 2025Exco Operating | 4,922 | 4,922 | 2,291 | 2,003 | 225 | $62.17 | $3.12 |
| Apr 2025Exco Operating | 4,912 | 4,912 | 2,902 | 2,742 | 83 | $63.54 | $3.42 |
| Mar 2025Exco Operating | 5,284 | 5,284 | 2,696 | 2,631 | 0 | $68.24 | $4.12 |
| Feb 2025Exco Operating | 4,529 | 4,529 | 2,363 | 2,296 | 0 | $71.53 | $4.19 |
| Jan 2025Exco Operating | 5,826 | 5,826 | 2,106 | 2,044 | 0 | $75.74 | $4.13 |
| Dec 2024Exco Operating | 5,695 | 5,695 | 2,911 | 2,847 | 0 | $70.12 | $3.01 |
| Nov 2024Exco Operating | 5,271 | 5,271 | 2,870 | 2,801 | 0 | $69.95 | $2.12 |
| Oct 2024Exco Operating | 4,922 | 4,922 | 2,668 | 2,597 | 0 | $71.99 | $2.20 |
| Sep 2024Exco Operating | 4,886 | 4,886 | 2,821 | 2,737 | 0 | $70.24 | $2.28 |
| Aug 2024Exco Operating | 6,260 | 6,260 | 3,328 | 2,997 | 91 | $76.68 | $1.99 |
| Jul 2024Exco Operating | 5,518 | 5,518 | 2,615 | 2,395 | 87 | $81.80 | $2.07 |
| Jun 2024Exco Operating | 4,460 | 4,460 | 2,755 | 2,694 | 0 | $79.77 | $2.54 |
| May 2024Exco Operating | 4,084 | 4,084 | 2,923 | 2,859 | 0 | $80.02 | $2.12 |
| Apr 2024Exco Operating | 2,936 | 2,936 | 1,962 | 1,896 | 0 | $85.35 | $1.60 |
| Mar 2024Exco Operating | 3,288 | 3,288 | 2,727 | 2,523 | 0 | $81.28 | $1.49 |
| Feb 2024Exco Operating | 5,188 | 5,188 | 3,231 | 3,156 | 0 | $77.25 | $1.72 |
| Jan 2024Exco Operating | 4,915 | 4,915 | 2,164 | 2,080 | 0 | $74.15 | $3.18 |
| Dec 2023Exco Operating | 5,488 | 5,488 | 2,161 | 2,098 | 0 | $71.90 | $2.52 |
| Nov 2023Exco Operating | 5,274 | 5,274 | 2,116 | 1,984 | 0 | $77.69 | $2.71 |
| Oct 2023Exco Operating | 5,040 | 5,040 | 2,422 | 2,267 | 0 | $85.64 | $2.98 |
| Sep 2023Exco Operating | 4,696 | 4,696 | 2,376 | 2,184 | 0 | $89.43 | $2.64 |
| Aug 2023Exco Operating | 5,536 | 5,536 | 2,241 | 2,023 | 0 | $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 KM-MILLER UNIT ZAV. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Exco Operating Company, LP.
- 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
Exco Operating Company, LP in Zavala County
- WINTERBOTHAM ZAV
632,421 bbl last 12 months
- TRAYLOR NORTH
498,519 bbl last 12 months
- TRAYLOR SOUTH ZAV
349,734 bbl last 12 months
- TIDWELL-HOWETT UNIT ZAV
79,928 bbl last 12 months
- TRAYLOR UNIT ZAV M
77,400 bbl last 12 months
Briscoe Ranch (Eagleford) field
- BRISCOE CARLA RANCH
1,032,239 bbl last 12 months
- SPR
989,424 bbl last 12 months
- BRISCOE CATARINA SOUTH
919,109 bbl last 12 months
- BRISCOE CATARINA WEST
638,591 bbl last 12 months
- BRISCOE COCHINA EAST RANCH
650,816 bbl last 12 months
New drilling permits in Zavala 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 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 18398, 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.