WELL · 42-391-31839 · DISTRICT 2

O Connor Thomas -C- #87

Refugio County · Tom Oconnor (5900 Sand) field · Vertical

O Connor Thomas -C- #87 (API 42-391-31839) is a well in Refugio County operated by Hilcorp Energy Company, completed May 10, 1985.

The RRC has issued 7 drilling permits between 1985 and 2017, permitted to 6,300 ft.

Completion filings report 10 formation tops, including Lagarto, Surface Sand Clay, Oakville, Catahoula.

Its 7 leases have reported 26M barrels of oil and 17.6M mcf of gas since January 1993, last reporting in July 2026. The leases carry 669 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 CompanyAug 29, 2017

6,300: total depth, ft
7: permits on file
Aug 29, 2017: last permit issued
May 10, 1985: completed
26M: cumulative oil, bbl
17.6M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: May 10, 1985
Shut in: —
Plugged: —

Surface location

28.370595, -97.152698

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 7 leases this well is completed on; they carry 669 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
O'Connor, Thomas -C- O-2-2876	Tom Oconnor (5900 Sand)	Hilcorp Energy Company	59	2.99M	2.17M	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
O'Connor, Thomas -C- O-2-9135	Tom Oconnor (5200, East)	Hilcorp Energy Company	12	272K	61.7K	Apr 2007 – Jul 2026
Thomas O'Connor -C- O-2-11477	Tom O'Connor (4650)	Hilcorp Energy Company	1	0	0	Oct 2017 – Jul 2026
O'Connor, Thomas "C" G-2-220913	Tom O'Connor (5410)	Hilcorp Energy Company	1	0	183K	May 2006 – Feb 2008
O'Connor, Thomas 'C' G-2-180970	Tom Oconnor (5300, East)	Hilcorp Energy Company	1	0	150K	Dec 2000 – May 2006
O'Connor, Thomas "C" G-2-177179	Tom O'Connor (5410)	Hilcorp Energy Company	1	0	99.4K	Feb 2000 – Dec 2000

Oil, barrels lease total

Last 12 months 690,195 · prior 12 542,543(+27%)

Gas, mcf lease total

Last 12 months 118,040 · prior 12 85,559(+38%)

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
830109-99	Recompletion	Hilcorp Energy Company	Aug 21, 2017	Aug 29, 2017	Sep 27, 2017	6,152
655798-99	Recompletion	Hilcorp Energy Company	Feb 21, 2008	Feb 28, 2008	Feb 26, 2008	6,152
618323-99	Recompletion	Hilcorp Energy Company	Apr 27, 2006	May 3, 2006	—	6,152
500790-99	Recompletion	Quintana Pet. Corp.	Oct 12, 2000	Oct 16, 2000	Dec 1, 2000	6,152
492198-99	Recompletion	Quintana Pet. Corp.	Feb 17, 2000	Feb 25, 2000	Feb 4, 2000	6,152
356130-99	Other	Quintana Pet. Corp.	Feb 16, 1989	Feb 17, 1989	—	6,152
269070-99	Drill	Quintana Pet. Corp.	Mar 4, 1985	Mar 12, 1985	—	6,300

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— G-2-177179	—	—	—	—
—	— G-2-180970	—	—	—	—
—	— G-2-220913	—	—	—	—
—	— O-2-2876	—	—	—	—
—	— O-2-5280	—	—	—	—
—	— O-2-9135	—	—	—	—
—	— O-2-11477	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 57 ft elevation.Download CSV →

Formation	MD ft	Subsea
LagartoLARGARTO	1,500	-1,443
Surface Sand Clay	1,500	-1,443
LagartoLARGARTO	2,750	-2,693
Oakville	2,750	-2,693
CatahoulaCATAHOULA (MIOCENE)	3,300	-3,243
Oakville	3,300	-3,243
Catahoula	3,543	-3,486
AnahuacANAHUAC (MIOCENE)	4,100	-4,043
Catahoula	4,100	-4,043
Frio	4,358	-4,301
Anahaua	4,365	-4,308
Anahauc	4,365	-4,308
FrioFRIO-GRETA (OLIGOCENE)	4,365	-4,308
FrioFRIO-GRETA	4,785	-4,728
FrioMIDDLE FRIO (SINTO)	5,000	-4,943
FrioMIDDLE FRIO (SINTON)	5,000	-4,943
FrioMIDDLE FRIO	5,400	-5,343
FrioLOWER FRIO (OLIGOCENE)	5,880	-5,823
FrioLOWER FRIO	6,152	-6,095
JacksonJACKSON/YEGUA	—	—
NO Change	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
4,643	4,646	Perforated
5,147	5,154	Perforated
5,217	5,224	Perforated
5,354	5,364	Perforated
5,680	5,686	Perforated
5,798	5,804	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
10.75	1,501	14.75	735 S
7	6,116	9.875	1,160 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
Aug 10, 2018	May 22, 2018	—
Apr 9, 2008	Mar 6, 2008	Yes
Mar 31, 2008	—	—
Mar 2, 2007	Jun 5, 2006	Yes
Nov 7, 2006	—	—
May 1, 2001	Dec 27, 2000	Yes
Mar 5, 2001	—	—
Jul 25, 2000	Apr 6, 2000	Yes
Jun 9, 2000	—	—
Aug 25, 1989	Jun 8, 1989	Yes
Aug 23, 1989	May 28, 1985	Yes
Jun 27, 1989	—	—
Jun 27, 1985	May 28, 1985	—
Jun 25, 1985	—	—

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 42-391-31839 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-391-31839 → 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'SD)FIELD Unit42-391-31609

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

Lagarto	1,500	-1,442
Oakville	2,750	-2,692
Catahoula	3,300	-3,242
Catahoula	3,609	-3,551
Anahuac	4,100	-4,042
Frio	4,365	-4,307
Frio	5,000	-4,942
Frio	5,068	-5,010

10 TOPS · FIRST 8

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

0.3 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

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

0.3 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
Frio	4,365	-4,312
Anahuac	4,365	-4,312

13 TOPS · FIRST 8

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

0.3 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

Tom O'Connor (5800 SD) FLD Unit42-391-31248

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

Lagarto	1,500	-1,441
Oakville	2,750	-2,691
Catahoula	3,300	-3,241
Catahoula	3,300	-3,241
Anahuac	4,100	-4,041
Frio	4,362	-4,303
Frio	4,365	-4,306
Frio	5,000	-4,941

10 TOPS · FIRST 8

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

0.4 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 (5800 Sd)field Unit42-391-01148

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

Lagarto	1,500	-1,447
Oakville	2,750	-2,697
Catahoula	3,300	-3,247
Anahuac	4,100	-4,047
Frio	4,365	-4,312
Frio	4,366	-4,313
Catahoula	4,566	-4,513
Top PF 4900	4,739	-4,686

12 TOPS · FIRST 8

Heard, Clement42-391-32518

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

Lagarto	2,750	-2,692
Oakville	3,300	-3,242
Catahoula	3,560	-3,502
Catahoula	3,563	-3,505
Frio	4,316	-4,258
Anahuac	4,365	-4,307
Anahuac	4,365	-4,307
Ananhuac	4,365	-4,307

14 TOPS · FIRST 8

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/39131839, documented in the API reference.