WELL · 42-391-31897 · DISTRICT 2

Thomas O'Connor 'C' #90

Thomas O'Connor 'C' #90 (API 42-391-31897) is a disposal or injection well in Refugio County operated by Hilcorp Energy Company under an active UIC permit.

The RRC has issued 5 drilling permits (amended once) between 1985 and 2005, permitted to 8,500 ft.

Completion filings report 7 formation tops, including Lagarto, Oakville, Catahoula, Anahuac.

Its 3 leases have reported 5.21M barrels of oil and 4.46M mcf of gas since January 1993, last reporting in July 2026. The leases carry 111 wells, so these are lease totals, not this well alone.

It holds an active disposal or injection permit, with 1.7M barrels injected in the 12 months reported through September 2025.

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	none
Production reports	Hilcorp Energy Companythrough Apr 2026
Latest permit	Hilcorp Energy CompanyDec 16, 2005

8,500: total depth, ft
6: permits on file
Dec 16, 2005: last permit issued
—: completed
5.21M: cumulative oil, bbl
4.46M: 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

No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.

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 111 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
O'Connor, Thomas -C- O-2-2876	Tom Oconnor (5900 Sand)	Hilcorp Energy Company	59	2.99M	2.17M	Jan 1993 – Jul 2026
O'Connor, Thomas 'C' G-2-180780	Tom Oconnor (5300, East)	Hilcorp Energy Company	1	0	189K	Oct 2000 – May 2005

Oil, barrels lease total

Last 12 months 8,061 · prior 12 12,358(-35%)

Gas, mcf lease total

Last 12 months 389 · prior 12 618(-37%)

Chain of custody

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

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

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
610985-99	Recompletion	Hilcorp Energy Company	Dec 13, 2005	Dec 16, 2005	Jan 10, 2006	6,100
557684-99	Recompletion	Hilcorp Energy Company	Feb 14, 2005	Feb 18, 2005	Mar 2, 2005	6,100
486165-98	Recompletion	Quintana Pet. Corp.	Oct 12, 2000	Jul 29, 1999	Oct 11, 2000	6,100
486165-99	Recompletion	Quintana Pet. Corp.	Jul 26, 1999	Jul 29, 1999	—	6,100
360790-99	Recompletion	Quintana Pet. Corp.	Jun 26, 1989	Jul 27, 1989	—	6,100
291091-99	Drill	Quintana Pet. Corp.	Nov 8, 1985	Nov 22, 1985	—	8,500

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— G-2-180780	—	—	—	—
—	— O-2-2587	—	—	—	—
—	— O-2-2876	—	—	—	—
—	— O-2-2876	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 55 ft elevation.Download CSV →

Formation	MD ft	Subsea
LagartoLARGARTO	1,500	-1,445
Oakville	2,750	-2,695
CatahoulaCATAHOULA (MIOCENE)	3,300	-3,245
Catahoula	3,535	-3,480
AnahuacANAHUAC (MIOCENE)	4,100	-4,045
Frio	4,319	-4,264
FrioFRIO-GRETA (OLIGOCENE)	4,365	-4,310
FrioMIDDLE FRIO(SINTON)	5,000	-4,945
FrioLOWER FRIO (OLIGOCENE)	5,880	-5,825
JacksonJACKSON/YEGUA	—	—
NO Change	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
3,933	3,974	Perforated
3,933	3,986	Perforated
3,975	3,986	Perforated
5,224	5,238	Perforated
5,472	5,478	Perforated
5,793	5,801	Perforated
5,916	5,921	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
10.75	1,501	14.75	684 S
7	6,082	9.875	1,350 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
Sep 8, 2021	Sep 1, 2021	—
Apr 16, 2015	Apr 15, 2015	—
Aug 25, 2006	Jan 24, 2006	Yes
Apr 6, 2006	—	—
Aug 11, 2005	May 13, 2005	Yes
May 23, 2005	—	—
Aug 7, 2001	Nov 6, 2000	Yes
Feb 15, 2001	—	—
Apr 8, 1986	Feb 25, 1986	Yes
Apr 4, 1986	—	—

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 42-391-31897 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-391-31897 → 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.

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

1.7M: bbl, last 12 reported months
27.3M: bbl, all reported
Sep 2025: reported through

UIC	Kind	Status	Permitted bbl/d	Max psi	Zone ft
000111752	W-14 Disposal	Active	25,000	1,765	3,530–4,070

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

Last 12 months 1,703,024 · prior 12 2,392,998(-29%)

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/39131897, documented in the API reference.