OPERATORS · RRC 140550  · P-5 STATUS Y

Cavalla Engy Expl Co

Cavalla Engy Expl CO has filed no drilling permits in the past 12 months; its most recent permit was issued October 8, 1991.

The RRC wellbore file lists 7 wells under its operatorship.

24 drilling permits have been issued to this operator number since 1977; its P-5 organization report was last filed November 4, 1994.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 7 of record
0
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.

29%
spud rate · 7 of 24 mature permits
14
median days permit to spud · middle half 12–16
0
spuds, last 180 days
0%
cancelled · 0 permits
17
expired undrilled
2
permits a year over 15 active years

Where

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

County12 moAll timeWellsLast
Calhoun county →—124Oct 8, 1991
Newton county →—40Nov 12, 1981
Lavaca county →—21Jan 21, 1980
Refugio county →—22Feb 9, 1978
Aransas county →—10Apr 12, 1979
Harris county →—10May 5, 1982
Matagorda county →—10Jul 20, 1989
Matgrda IS-SB county →—10Jan 22, 1980

All 24 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
Frio20
Miocene (undifferentiated)20

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 →

0
bbl oil, last 12 reported months
—
vs the 12 months before
0
mcf gas incl. casinghead, last 12
0
bbl oil since reporting began

No lease production reported under this operator number in the last three years.

Beyond the permit record

RRC wellbore file

Wells of record

7
on the schedule
0
producing
0
shut in
0
injection
0
temp. abandoned
6
plugged

How it got them

4
permitted itself
0
acquired from others
4
permitted, now run by others

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

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
Drill0016
Other006
Recompletion002

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.

P-5 organization report

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

Registration
Status code Y
Last filed Nov 4, 1994
Address
1021 Main St 1990
Houston, TX 77002
Officers and agents
McCarthy, James A. · President
McCarthy, Shirley B. · Secretary/Treasurer
Brennan, Thomas · Secretary

Latest permits

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

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
392139Oct 8, 1991Oct 8, 1991Cavalla Energy Exploration Co.CalhounEvans, Harold et UX #19,10005731470
361310Jul 20, 1989Jul 20, 1989Cavalla Energy Exploration Co.MatagordaHamill, C. G. #16,50032131592
411792May 11, 1989May 11, 1989Cavalla Energy Exploration Co.CalhounKarcher #114,00005731522
355869Feb 8, 1989Feb 8, 1989Cavalla Energy Exploration Co.CalhounEvans, Harold et UX #110,00005731470
278618Jun 24, 1985Jun 24, 1985Cavalla Energy Exploration Co.CalhounState Tract 32 #37,00005731383
152640May 5, 1982May 5, 1982Cavalla Energy Exploration Co.HarrisEllington Air Force Base #19,24220131368
140399Nov 12, 1981Nov 12, 1981Cavalla Energy Exploration Co.NewtonHankamer #18,26635130320
118227May 15, 1981May 15, 1981Cavalla Energy Exploration Co.CalhounState Tract 72 #17,50805731087
108587Feb 17, 1981Feb 17, 1981Cavalla Energy Exploration Co.NewtonHankamer #18,26635130320
99908Nov 20, 1980Nov 20, 1980Cavalla Energy Exploration Co.CalhounState Tract 67 #15,92705731037
96046Oct 20, 1980Oct 20, 1980Cavalla Energy Exploration Co.CalhounState Tract 240 #15,83405731028
70871Jan 25, 1980Jan 25, 1980Cavalla Energy Exploration Co.NewtonHankamer #18,26635130320
70554Jan 22, 1980Jan 22, 1980Cavalla Energy Exploration Co.Matgrda IS-SBState Tract 629-S #15,42460330150
70274Jan 21, 1980Jan 21, 1980Cavalla Energy Exploration Co.LavacaLowrance, S. A. #23,30028531466
55883Aug 17, 1979Aug 17, 1979Cavalla Energy Exploration Co.NewtonHankamer #18,30035130320

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/140550, documented in the API reference.