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Royalty Clerk

Texas field · RRC field 54885666 · District 04

Lopez, North (Lopez)

5 producing leases run by 2 operators in 2 Texas counties. The field reported 4,392 barrels of oil and 0 mcf of gas in the 12 months through Jul 2026.

Field dossier · 2 counties

4,392bbl oil, last 12 months−23% vs prior year
Producing leases
5of 6 on record
Operators
2
Counties
2
Biggest operator
Rattlesnake Operating Co, LLC

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Where the field sits

fewermore

Duval County: 4 producing leasesWebb County: 1 producing leaseDuvalWebb
2 countiesClick a county to open it
RRC field no.
54885666
RRC district
04
Data through
Jul 2026
Leases on record
6

Production

Five years of output in Lopez, North (Lopez)

Monthly totals across the leases the Railroad Commission assigns to this field.

Oil output in the Lopez, North (Lopez) field fell 23% over the last 12 months

4,392 bbl in the 12 months through Jul 2026, against 5,723 bbl in the 12 months before. Peak month: Feb 2022, 1,108 bbl.

Oil output in the Lopez, North (Lopez) field fell 23% over the last 12 months4,392 bbl in the 12 months through Jul 2026, against 5,723 bbl in the 12 months before. Peak month: Feb 2022, 1,108 bbl.Oil, bbl per month02505007501,0001,250Peak 1,108 (Feb 22)31720222023202420252026
Oil output in the Lopez, North (Lopez) field fell 23% over the last 12 months4,392 bbl in the 12 months through Jul 2026, against 5,723 bbl in the 12 months before. Peak month: Feb 2022, 1,108 bbl.Oil, bbl per month02505007501,0001,250Peak 1,108 (Feb 22)317'22'23'24'25'26

SourceTexas Railroad Commission, Production Data Query, summed over the leases assigned to field 54885666. Reported through Jul 2026, file dated Sep 18, 2026. The newest month is often revised as operators file late.

Leases

Leases in the Lopez, North (Lopez) field

Ranked by last-12-month output. Filter by operator, and open any lease for its month-by-month ledger.

Showing 5 of 5.

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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 Lopez, North (Lopez) field

Who operates here, and where

Each operator and county links to its own page, so you can see the rest of what they run.

Operators in this field, by oil

Rattlesnake Operating Co leads

  1. Rattlesnake Operating Co, LLC3 producing leases here2,816bbl
  2. Caribbean Energy LLC II2 producing leases here1,576bbl

Counties in this field, by oil

Duval County leads

  1. Duval County4 producing leases4,226bbl
  2. Webb County1 producing lease166bbl

Recent drilling permits in the Lopez, North (Lopez) 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
54885666
RRC district
04
Leases on record
6
Producing leases
5

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 Lopez, North (Lopez) 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.