WELL · 42-391-01171 · DISTRICT 2

Tom Oconnor (5800 SD) Fld. Unit #W227A

Refugio County · Tom Oconnor (5800) field · Vertical

Tom Oconnor (5800 SD) Fld. Unit #W227A (API 42-391-01171) is a former disposal or injection well in Refugio County, last operated by Hilcorp Energy Company; its UIC permit is no longer active.

The RRC has issued one drilling permit, issued November 7, 2017, permitted to 5,925 ft.

Completion filings report 6 formation tops, including Lagarto, Oakville, Catahoula, Anahuac.

Its 3 leases have reported 25.5M barrels of oil and 17.5M mcf of gas since January 1993, last reporting in July 2026. The leases carry 713 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 CompanyNov 7, 2017

5,925: total depth, ft
1: permits on file
Nov 7, 2017: last permit issued
—: completed
25.5M: cumulative oil, bbl
17.5M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: —
Shut in: —
Plugged: —

Surface location

28.365794, -97.158592

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 713 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Oconnor, Thomas, -C- O-2-2587	Tom Oconnor (5500 Sand)	Hilcorp Energy Company	51	2.22M	2.1M	Jan 1993 – Jul 2026
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 (4150 Ft. Sd.) Unit O-2-8874	Tom O'Connor (4150)	Hilcorp Energy Company	68	512K	461K	Jun 2004 – Jul 2026

Oil, barrels lease total

Last 12 months 679,299 · prior 12 538,719(+26%)

Gas, mcf lease total

Last 12 months 117,994 · prior 12 84,482(+40%)

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
832570-99	Recompletion	Hilcorp Energy Company	Oct 31, 2017	Nov 7, 2017	Jul 20, 2018	5,925

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-2-2587	—	—	—	—
—	— O-2-5280	—	—	—	—
—	— O-2-8874	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 53 ft elevation.Download CSV →

Formation	MD ft	Subsea
LagartoLARGARTO	1,500	-1,447
Oakville	2,750	-2,697
CatahoulaCATAHOULA (MIOCENE)	3,300	-3,247
Catahoula	3,559	-3,506
AnahuacANAHUAC (MIOCENE)	4,100	-4,047
Frio	4,332	-4,279
FrioFRIO-GRETA (OLIGOCENE)	4,365	-4,312
FrioMIDDLE FRIO (SINTON)	5,000	-4,947
FrioLOWER FRIO (OLIGOCENE)	5,880	-5,827
JacksonJACKSON/YEGUA	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
5,502	5,507	Perforated
5,532	5,536	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	1,048	14	350 S
9.625	1,049	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
Nov 16, 2018	Nov 6, 2018	—
Oct 27, 1986	Oct 17, 1986	—
Jan 12, 1984	Nov 14, 1968	—
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 42-391-01171 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-391-01171 → 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 →

Tom O'Connor (5800 Sand) Field U42-391-31613

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

Surface, Sand & Clay	1,500	-1,446
Lagarto	2,750	-2,696
Oakville	3,300	-3,246
Catahoula	3,560	-3,506
Catahoula	4,100	-4,046
Frio	4,325	-4,271
Anahuac	4,365	-4,311
Frio	4,785	-4,731

11 TOPS · FIRST 8

O'Connor, Thomas 'C'42-391-01167

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

Lagarto	1,500	-1,446
Oakville	2,750	-2,696
Catahoula	3,300	-3,246
Catahoula	3,565	-3,511
Anahuac	4,100	-4,046
Frio	4,329	-4,275
Frio	4,365	-4,311
Frio	4,785	-4,731

12 TOPS · FIRST 8

Tom Oconnor (5800 SD) Fld. Unit42-391-31896

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

Lagarto	1,500	-1,445
Oakville	2,750	-2,695
Catahoula	3,300	-3,245
Anahuac	4,100	-4,045
Frio	4,365	-4,310
Frio	5,000	-4,945
Frio	5,880	-5,825
NO Change	—

Thomas O'Connor 'C'42-391-01147

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

Lagarto	1,500	-1,447
Oakville	2,750	-2,697
Catahoula	3,300	-3,247
Catahoula	3,538	-3,485
Anahuac	4,100	-4,047
Frio	4,321	-4,268
Anahuac	4,365	-4,312
Frio	4,365	-4,312

13 TOPS · FIRST 8

Thomas O'Connor -C-42-391-01132

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

Lagarto	1,500	-1,442
Oakville	2,750	-2,692
Catahoula	3,300	-3,242
Catahoula	3,563	-3,505
Anahuac	4,100	-4,042
Anahuac	4,100	-4,042
Frio	4,322	-4,264
Frio	4,365	-4,307

12 TOPS · FIRST 8

Tom O'Connor (5800'SAND)FIELD UT42-391-31860

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

Lagarto	1,500	-1,442
Oakville	2,750	-2,692
Catahoula	3,300	-3,242
Catahoula	3,300	-3,242
Anahuac	4,100	-4,042
Frio	4,365	-4,307
Frio	4,365	-4,307
Frio	5,000	-4,942

11 TOPS · FIRST 8

Tom O'CONNOR(5800SAND)FIELD Unit42-391-31839

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

Lagarto	1,500	-1,443
Surface Sand Clay	1,500	-1,443
Oakville	2,750	-2,693
Catahoula	3,300	-3,243
Catahoula	3,543	-3,486
Anahuac	4,100	-4,043
Frio	4,358	-4,301
Frio	4,365	-4,308

18 TOPS · FIRST 8

Thomas O'Connor 'C'42-391-01158

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

Oakville	2,900	-2,848
Catahoula	3,548	-3,496
Anahuac	4,100	-4,048
Greta	4,300	-4,248
Frio	4,330	-4,278
Frio	5,000	-4,948
Frio	5,800	-5,748
Jackson	—

9 TOPS · FIRST 8

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

0: bbl, last 12 reported months
0: bbl, all reported
Sep 2025: reported through

UIC	Kind	Status	Permitted bbl/d	Max psi	Zone ft
000116025	H-1 Injection	Not activated	5,000	2,035	4,070–4,130

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

Last 12 months 0 · prior 12 0

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/39101171, documented in the API reference.