Petrora

OPERATORS · RRC 546675  · P-5 STATUS Y

McDay Engy Corp

Plano, TX

Watch this operator

Mcday Engy Corp has filed no drilling permits in the past 12 months; its most recent permit was issued August 17, 2015.

The RRC wellbore file lists 153 wells under its operatorship (51 producing, 20 shut in).

Lease reports credit it with 6.61K barrels of oil and 11.2K mcf of gas in the 12 months reported through April 2026, down 32% on the year before.

It holds 8 active disposal or injection permits, injecting 9.95K barrels in the 12 months reported through June 2025.

52 drilling permits have been issued to this operator number since 1979; its P-5 organization report was last filed April 4, 2026.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
51
producing wells, of 153 of record
117
leases it reports
—
horizontal, 12 months

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

From permit to spud

FROM THE DATES ON ITS W-1 PERMITS · ALL TIME

A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.

58%
spud rate · 30 of 52 mature permits
16
median days permit to spud · middle half 5–49
0
spuds, last 180 days
0%
cancelled · 0 permits
22
expired undrilled
1
permits a year over 37 active years

Where

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

County12 moAll timeWellsLast
Zavala county →—27127Aug 17, 2015
Wichita county →—100Oct 27, 2004
Harris county →—71Dec 30, 1993
Frio county →—47Nov 3, 2008
Jack county →—37Sep 14, 2004
Starr county →—10Jun 6, 2011

All 52 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
Eagle Ford80
Austin Chalk80
Buda70
Escondido50
Del Rio30
Olmos20
San Miguel10
Gunsight10
Frio10

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 →

6.61K
bbl oil, last 12 reported months
-32%
vs the 12 months before
11.2K
mcf gas incl. casinghead, last 12
1.56M
bbl oil since reporting began

Oil, barrels

Last 12 months 6,606 · prior 12 9,736(-32%)

05001K1.5K202420252026

Gas, mcf

Last 12 months 11,214 · prior 12 10,767(+4%)

05001K1.5K202420252026

Beyond the permit record

RRC wellbore file

Wells of record

153
on the schedule
51
producing
20
shut in
2
injection
22
temp. abandoned
49
plugged

How it got them

11
permitted itself
139
acquired from others
19
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

8
active UIC permits of 23
2.32K
permitted bbl/day, active
9.95K
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Zavala8 active2.32K bbl/d
Wichita0 active0 bbl/d
Jack0 active0 bbl/d
Clay0 active0 bbl/d
Frio0 active0 bbl/d
LA Salle0 active0 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
Drill0044
Recompletion006
Reenter002

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
Winn-Dulce (Bracero-Oil)980752102914
Winn-Dulce (Elaine)980753002516
Pearsall (Austin Chalk)69981125230
Winn-Dulce (del Monte-Oil)98075285111
Winn-Dulce (Olmos)98075500110
Pearsall (Buda Lime)6998125076
Jack County Regular4527400170
Winn-Dulce (del Monte)9807525063
Winn-Dulce (Bracero)9807520053
Winn-Dulce (Olmos Lower)9807552540
Judge Mills (Bracero - Oil)4749715040
Mt. Calm6332600140

P-5 organization report

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

Registration
Status code Y
Last filed Apr 4, 2026
Gas operatorOil operator
Address
5504 Democracy Dr Ste 240
Plano, TX 75024
(214) 202-1064
Officers and agents
Daylong, James Mike · Director,president
McPherson, Richard C. · Director,vice President

Latest permits

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

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
809282Aug 17, 2015Aug 17, 2015McDay Energy Corp.ZavalaPryor Ranch #12HH6,00050733254
807802Jun 25, 2015Jun 25, 2015McDay Energy Corp.ZavalaPryor Ranch #11HH6,00050733247
807802Jun 25, 2015Jun 25, 2015McDay Energy Corp.ZavalaPryor Ranch #11HH6,00050733247
790863Aug 8, 2014Aug 8, 2014McDay Energy Corp.ZavalaPryor Ranch #10A9,00050733180
790863Aug 8, 2014Aug 8, 2014McDay Energy Corp.ZavalaPryor Ranch #10HH9,00050733180
784557May 7, 2014May 7, 2014McDay Energy Corp.ZavalaPryor Ranch #9A9,00050733148
778560Feb 4, 2014Feb 4, 2014McDay Energy Corp.ZavalaPryor Ranch #8A9,00050733103
762552May 14, 2013May 14, 2013McDay Energy Corp.ZavalaPryor Ranch #7A9,00050733009
762552May 14, 2013May 14, 2013McDay Energy Corp.ZavalaPryor Ranch #7A9,00050733009
743259Jun 29, 2012Jun 29, 2012McDay Energy Corp.ZavalaPryor Ranch #6A6,00050732917
743259Jun 29, 2012Jun 29, 2012McDay Energy Corp.ZavalaPryor Ranch #6A6,00050732917
741965Jun 12, 2012Jun 12, 2012McDay Energy Corp.ZavalaPryor Ranch #5A6,00050732911
735639Mar 23, 2012Mar 23, 2012McDay Energy Corp.ZavalaPryor Ranch #4A6,00050732884
730218Dec 23, 2011Dec 23, 2011McDay Energy Corp.ZavalaPryor Ranch #3A6,00050732857
730218Dec 23, 2011Dec 23, 2011McDay Energy Corp.ZavalaPryor Ranch #3A6,00050732857

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/546675, documented in the API reference.