WELL · 42-391-00435 · DISTRICT 2

Tom Oconnor (5800 SD) Fld. Unit #A 27

Refugio County · Tom Oconnor (5800) field · Vertical

Tom Oconnor (5800 SD) Fld. Unit #A 27 (API 42-391-00435) is a well in Refugio County operated by Hilcorp Energy Company, completed August 9, 1999.

The RRC has issued 4 drilling permits between 2005 and 2024, permitted to 5,925 ft.

Completion filings report 7 formation tops, including Lagarto, Surface Sand Clay, Oakville, Catahoula.

Its 3 leases have reported 24.9M barrels of oil and 16.1M mcf of gas since January 1993, last reporting in July 2026. The leases carry 691 wells, so these are lease totals, not this well alone.

Operator of record

Hilcorp Energy Company

Houston, TX · P-5 Y, filed Mar 26, 2026 · 3,453 permits on file · (713) 209-2411

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Hilcorp Energy Company
Production reports	Hilcorp Energy Companythrough Apr 2026
Latest permit	Hilcorp Energy CompanyJan 5, 2024

5,925: total depth, ft
4: permits on file
Jan 5, 2024: last permit issued
Aug 9, 1999: completed
24.9M: cumulative oil, bbl
16.1M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: Aug 9, 1999
Shut in: —
Plugged: —

Surface location

28.382660, -97.127362

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in Refugio County.

Lease production

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Texas reports oil by lease, not by well. These are the 3 leases this well is completed on; they carry 691 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Tom Oconnor (5800 SD) Fld. Unit O-2-5280	Tom Oconnor (5800)	Hilcorp Energy Company	594	22.8M	14.9M	Jan 1993 – Jul 2026
Tom O'Connor (5730 Ft. Sd.) Unit O-2-8569	Tom O'Connor (5730, East)	Hilcorp Energy Company	38	1.01M	815K	Oct 2000 – Jul 2026
Tom O'CONNOR(5600 Foot Sand)unit O-2-8950	Tom O'Connor (5600 Foot Sand)	Hilcorp Energy Company	59	1.13M	357K	Mar 2005 – Jul 2026

Oil, barrels lease total

Last 12 months 698,330 · prior 12 559,500(+25%)

Gas, mcf lease total

Last 12 months 118,671 · prior 12 85,441(+39%)

Chain of custody

Every operator that reported production on this well's lease, in order.

1Quintana Pet. Corp.Jan 1993 → Nov 2000
2Hilcorp Energy CompanyDec 2000 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
896222-99	Recompletion	Hilcorp Energy Company	Dec 29, 2023	Jan 5, 2024	—	5,925
822896-99	Recompletion	Hilcorp Energy Company	Feb 6, 2017	Feb 17, 2017	Feb 16, 2017	5,925
776566-99	Recompletion	Hilcorp Energy Company	Jan 3, 2014	Jan 16, 2014	Dec 26, 2013	5,925
600324-99	Recompletion	Hilcorp Energy Company	May 6, 2005	May 10, 2005	Apr 27, 2005	5,925

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-2-5280	—	—	—	—
—	— O-2-5280	—	—	—	—
—	— O-2-8569	—	—	—	—
—	— O-2-8569	—	—	—	—
—	— O-2-8950	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 51 ft elevation.Download CSV →

Formation	MD ft	Subsea
LagartoLARGARTO	1,500	-1,449
Surface Sand Clay	1,500	-1,449
LagartoLARGARTO	2,750	-2,699
Oakville	2,750	-2,699
CatahoulaCATAHOULA (MIOCENE)	3,300	-3,249
Oakville	3,300	-3,249
Catahoula	3,589	-3,538
AnahuacANAHUAC (MIOCENE)	4,100	-4,049
Catahoula	4,100	-4,049
CatahoulaCATAHOULA (MIOCENE)	4,100	-4,049
Frio	4,364	-4,313
AnahuacANAHUAC (MIOCENE)	4,365	-4,314
FrioFRIO-GRETA (OLIGOCENE)	4,365	-4,314
FrioFRIO-GRETA (OLIG)	4,785	-4,734
FrioMIDDLE FRIO (SINTON)	5,000	-4,949
FrioMIDDLE FRIO (SINTON)	5,400	-5,349
FrioFRIO 5730	5,725	-5,674
FrioLOWER FRIO (OLIGOCENE)	5,880	-5,829
FrioLOWER FRIO (OLIG)	5,925	-5,874
JacksonJACKSON/YEGUA	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
5,048	5,054	Perforated
5,632	5,638	Perforated
5,729	5,741	Perforated
5,800	5,820	Perforated
5,807	5,824	Perforated
5,851	5,856	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	1,055	16	350 S
5	5,923	8.75	500 S

Completion filings

W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →

Filed	W-2 / G-1 date	Logs referenced
Oct 21, 2024	Jun 14, 2024	—
Jul 18, 2017	Jun 26, 2017	—
Feb 27, 2017	Jan 11, 2017	—
Aug 16, 2005	May 23, 2005	Yes
Jun 9, 2005	Aug 13, 1999	—
Oct 13, 1999	Aug 13, 1999	—
Dec 9, 1985	Oct 30, 1985	—
Jan 12, 1984	—	—

The source documents

Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.

Wellbore filings for 42-391-00435 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-391-00435 → scanned completion filings

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.

Nearby wells and their tops

NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM

Draw a cross-section

This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Heard, Fannie V. W., Mrs.42-391-00562

0.4 KM · Hilcorp Energy Company · Section with this well →

Catahoula	3,556	-3,526
Frio	4,346	-4,316
Jackson	—

Mrs. Fannie V. W. Heard42-391-00567

0.5 KM · Hilcorp Energy Company · Section with this well →

NO Change

—

Tom O'CONNOR(5600 Foot Sand)unit42-391-00565

0.6 KM · Hilcorp Energy Company · Section with this well →

Catahoula	3,577	-3,525
Frio	4,339	-4,287
Jackson	—

Tom Oconnor (5800 SD) Fld. Unit42-391-00570

0.7 KM · Quintana Pet. Corp. · Section with this well →

Lagarto	1,500	-1,449
Surface Sand Clay	1,500	-1,449
Oakville	2,750	-2,699
Catahoula	3,300	-3,249
Anahuac	4,100	-4,049
Catahoula	4,100	-4,049
Anahuac	4,100	-4,049
Frio	4,362	-4,311

17 TOPS · FIRST 8

Williams, Maude et al "A"42-391-00442

0.7 KM · Quintana Pet. Corp. · Section with this well →

Lagarto	2,750	-2,699
Oakville	3,300	-3,249
Catahoula	3,622	-3,571
Catahoula	4,100	-4,049
Anahuac	4,365	-4,314
Frio	4,399	-4,348
Frio	4,785	-4,734
Frio	5,400	-5,349

10 TOPS · FIRST 8

Williams, Maude et al "A"42-391-00420

0.9 KM · Quintana Pet. Corp. · Section with this well →

Lagarto	1,500	-1,446
Oakville	2,750	-2,696
Catahoula	3,300	-3,246
Catahoula	3,300	-3,246
Catahoula	3,578	-3,524
Anahuac	4,100	-4,046
Anahuac	4,100	-4,046
Frio	4,338	-4,284

14 TOPS · FIRST 8

Tom O'CONNOR(5600 Foot Sand)un42-391-00560

0.9 KM · Quintana Pet. Corp. · Section with this well →

Lagarto	1,500	-1,447
Oakville	2,750	-2,697
Catahoula	3,300	-3,247
Catahoula	3,543	-3,490
Catahoula	4,100	-4,047
Anahuac	4,100	-4,047
Frio	4,331	-4,278
Anahuac	4,365	-4,312

13 TOPS · FIRST 8

Heard, Mrs Fannie V.W.42-391-00563

1.0 KM · Hilcorp Energy Company · Section with this well →

Lagarto	1,500	-1,441
Oakville	2,750	-2,691
Catahoula	3,300	-3,241

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

36.1K: bbl, last 12 reported months
2.7M: bbl, all reported
Sep 1999: reported through

UIC	Kind	Status	Permitted bbl/d	Max psi	Zone ft
000054167	H-1 Injection	Canceled Oct 5, 1999	6,000	2,250	5,807–5,824

MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS

Last 12 months 36,055 · prior 12 85,986(-58%)

TexNet catalog via USGS

Seismicity near this well

0: M2+ events within 10 km, last 2 years
—: largest

A proximity count, not an attribution. How to read it →

About this data

Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.

New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease

Developers: this page as JSON is GET /v1/data/wells/39100435, documented in the API reference.