Petrora

OPERATORS · RRC 537025  · P-5 STATUS Y

Mazco Engy LLC

San Antonio, TX

Watch this operator

Mazco Engy LLC has filed no drilling permits in the past 12 months; its most recent permit was issued April 11, 2024.

The RRC wellbore file lists 107 wells under its operatorship (28 producing, 2 shut in).

Lease reports credit it with 19K barrels of oil and 2.6K mcf of gas in the 12 months reported through April 2026, down 9% on the year before.

It holds 4 active disposal or injection permits, injecting 169K barrels in the 12 months reported through June 2025.

1 drilling permits have been issued to this operator number since 2024; its P-5 organization report was last filed September 4, 2025.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
28
producing wells, of 107 of record
17
leases it reports
—
horizontal, 12 months

WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026

Permits issued by month

LAST 1 MONTHS · BY ISSUE DATE

Last 12 months 1

01

Where

Counties by permits in the last 12 months, with all-time permits and current wells of record there.

County12 moAll timeWellsLast
Frio county →—110Apr 11, 2024

All 1 permits, searchable → · Leases it reports → · On the map →

Formations in its completed wells

Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →

FormationWellsPermitted last 3 yrs
No completion tops on file.

Production by month

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →

19K
bbl oil, last 12 reported months
-9%
vs the 12 months before
2.6K
mcf gas incl. casinghead, last 12
144K
bbl oil since reporting began

Oil, barrels

Last 12 months 18,958 · prior 12 20,844(-9%)

01K2K3K202420252026

Gas, mcf

Last 12 months 2,600 · prior 12 2,457(+6%)

0200400202420252026

Beyond the permit record

RRC wellbore file

Wells of record

107
on the schedule
28
producing
2
shut in
3
injection
0
temp. abandoned
56
plugged

How it got them

0
permitted itself
16
acquired from others
0
permitted, now run by others

Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →

RRC UIC permits · H-10 reported volumes

Disposal and injection

4
active UIC permits of 4
6.53K
permitted bbl/day, active
169K
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Atascosa4 active6.53K bbl/d

Permitted volume is a ceiling, not throughput. How to read it →

Permit types

Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →

Type12 moPrior 12All time
Reenter001

Fields

RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.

FieldWellsProducing
Pruitt SE. (Olmos)73320500333
Crown E. (Navarro)22011500336
Pleasanton S. (Carrizo Sand)71926250208
Stacy (Olmos -A-)85457500103
Jourdanton (Recklaw)4735870085
Pleasanton S. (Queen City)7192675011
Pleasanton S. (Sparta)7192687511
Pleasanton South (Edwards Lime)7192650011

P-5 organization report

As registered with the RRC. About the P-5 →

Registration
Status code Y
Last filed Sep 4, 2025
Oil operator
Address
9423 Cinchona Trail
San Antonio, TX 78266
(210) 460-9481
Officers and agents
Mazurek, Patrick · Manager
Mazurek, Sharon · Filing Agent

Latest permits

NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
894468Apr 11, 2024Apr 11, 2024Mazco Energy LLCFrioThompson, C. M. #35,90416331009
752075Dec 17, 2012Dec 17, 2012Rickaway Energy, Corp.AtascosaTroell, Chas. T. #91,90001334644
460035Mar 18, 1997Mar 18, 1997Pedeco, Inc.AtascosaButts & Sawyer #19,00001334081
302167May 15, 1986May 15, 1986Labelle CorporationAtascosaDavis, Milton "B" #54,60001333769
302164May 15, 1986May 15, 1986Labelle CorporationAtascosaDavis, Milton "B" #64,60001333768
291297Nov 26, 1985Nov 26, 1985Labelle CorporationAtascosaDavis, Milton "B" #24,60001333639
291325Nov 26, 1985Nov 26, 1985Labelle CorporationAtascosaDavis, Milton "B" #34,60001333640
282074Aug 8, 1985Aug 8, 1985Labelle CorporationAtascosaDavis, Milton #1B5,00001333486
232499Mar 15, 1984Mar 15, 1984Cude, James W. OilAtascosaMiller Bros. #81,80001332617
226525Jan 12, 1984Jan 12, 1984Cude, James W. OilAtascosaMiller Bros #71,75001332515
221955Nov 28, 1983Nov 28, 1983Cude, James W. OilAtascosaMiller Bros. #61,75001332446
207621Aug 25, 1983Aug 25, 1983Cude, James W. OilAtascosaMiller Bros. #51,75001332164
198992Jun 21, 1983Jun 21, 1983Cude, James W. OilAtascosaMiller Bros. #41,75001331960
194418May 11, 1983May 11, 1983Cude, James W. OilAtascosaMiller Bros. #31,75001331922
184503Jan 28, 1983Jan 28, 1983Cude, James W. OilAtascosaMiller Bros. #21,75001331783

Full permit history →

About this data

Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.

Developers: this page as JSON is GET /v1/data/operators/tx/537025, documented in the API reference.