Texas field · RRC field 63658001 · District 01
Muil
1 producing lease run by 1 operator in 1 Texas county. The field reported 4,603 barrels of oil and 0 mcf of gas in the 12 months through Jul 2026.
Field dossier · 1 county
- Producing leases
- 1
- Operators
- 1
- Counties
- 1
- Biggest operator
- Flat Top Operating, LLC
Own minerals in this field?
Upload a royalty check stub or a phone photo. We compare each month with the state numbers for your lease and tell you what to ask your operator.
Where the field sits
This county
- RRC field no.
- 63658001
- RRC district
- 01
- Data through
- Jul 2026
- Leases on record
- 1
Production
Five years of output in Muil
Oil output in the Muil field rose 74% over the last 12 months
4,603 bbl in the 12 months through Jul 2026, against 2,638 bbl in the 12 months before. Peak month: Sep 2021, 792 bbl.
SourceTexas Railroad Commission, Production Data Query, summed over the leases assigned to field 63658001. Reported through Jul 2026, file dated Sep 18, 2026. The newest month is often revised as operators file late.
Leases
Leases in the Muil field
4,603bbl oil+74% on the year before
Showing 1 of 1.
SourceTexas Railroad Commission, Production Data Query. Ranked by an approximate value of last-12-month output, so oil and gas wells sort together.
In the Muil field
Who operates here, and where
Operators in this field, by oil
Flat Top Operating leads
Counties in this field, by oil
Atascosa County leads
Recent drilling permits in the Muil field
No recent drilling permits in this field are in our data yet.
For owners
What a field is, and why it matters to your check
- RRC field number
- 63658001
- RRC district
- 01
- Leases on record
- 1
- Producing leases
- 1
The Railroad Commission assigns each lease to a field: the underground pool or formation it produces from. A field can cross county lines and hold leases from many operators. Leases in the same field often move together, because they draw on the same rock.
That makes the field a fair yardstick. If your lease fell sharply and the rest of Muil did not, that is worth a question to your operator. If the whole field fell, the cause is probably geology or price, not your check.
The field trend above sums every lease in the field, so it is a good comparison for the lease page of any lease listed here.