WELL · 42-103-33166 · DISTRICT 8
University O #4
Crane County · Block 31 East (Atoka) field · Vertical
University O #4 (API 42-103-33166) is a well in Crane County operated by Apache Corporation, completed July 13, 1990.
The RRC has issued 3 drilling permits between 1983 and 2020, permitted to 9,250 ft.
Completion filings report 6 formation tops, including Grayburg, Glorieta, Pennsylvanian, Atoka.
Its 2 leases have reported 213K barrels of oil and 1.48M mcf of gas since January 1993, last reporting in July 2026. The leases carry 9 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Y, filed Oct 4, 2025 · 9,754 permits on file · (713) 296-6400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Formentera Operations LLCthrough Apr 2026 |
| Latest permit | Apache CorporationApr 24, 2020 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,250
- total depth, ft
- 3
- permits on file
- Apr 24, 2020
- last permit issued
- Jul 13, 1990
- completed
- 213K
- cumulative oil, bbl
- 1.48M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 13, 1990
- Shut in
- —
- Plugged
- —
Surface location
31.461074, -102.418819
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Crane County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases this well is completed on; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University O 25 O-10-27630 | Block 31 (Devonian) | Formentera Operations LLC | 8 | 199K | 1.37M | Jan 1993 – Jul 2026 |
| University "O" O-10-32821 | Block 31, East (Atoka) | Apache Corporation | 1 | 14.2K | 111K | Jan 1993 – Jul 2020 |
Gas, mcf lease total
Last 12 months 25,744 · prior 12 26,829(-4%)
Oil, barrels lease total
Last 12 months 2,576 · prior 12 2,766(-7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Arco Oil & Gas Co.Jan 1993 → May 1994
- 2Arco PermianJun 1994 → Dec 2001
- 3BP America Production CompanyJan 2002 → Nov 2010
- 4Apache CorporationDec 2010 → Jun 2021
- 5Slant Operating, LLCJul 2021 → Oct 2023
- 6Formentera Operations LLCNov 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 863383-99 | Recompletion | Apache Corporation | Apr 17, 2020 | Apr 24, 2020 | Aug 17, 2012 | 9,250 |
| 373922-99 | Recompletion | Arco Oil & Gas Co. | May 30, 1990 | Jun 1, 1990 | — | 9,250 |
| 193607-99 | Drill | Arco Oil & Gas Co. | May 6, 1983 | May 6, 1983 | Jun 6, 1983 | 9,250 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-27630 | — | — | — | — |
| — | — O-10-27630 | — | — | — | — |
| — | — O-10-32821 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,550 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Grayburg | 3,041 | -491 |
| Glorieta | 4,282 | -1,732 |
| PennsylvanianPENN DETRITAL | 7,274 | -4,724 |
| PennsylvanianPENN DETRITIAL | 7,274 | -4,724 |
| Atoka | 8,142 | -5,592 |
| Barnett | 8,164 | -5,614 |
| Devonian | 8,962 | -6,412 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,142 | 8,164 | Perforated |
| 8,966 | 9,094 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 3,603 | 11 | 1,500 S |
| 8.625 | 3,603 | — | — |
| 2.375 | 8,852 | — | — |
| 5.5 | 9,247 | 7.875 | 1,100 S |
| 5.5 | 9,250 | — | 1,100 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 →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jun 22, 2020 | — | — |
| 00 | Jun 11, 2020 | Apr 29, 2020 | — |
| 00 | Oct 23, 1990 | Sep 14, 1990 | Yes |
| 00 | Oct 15, 1990 | Jul 28, 1983 | — |
| 00 | Jan 12, 1984 | Jul 28, 1983 | — |
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 42-103-33166 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-103-33166 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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.
University O 2542-103-33281
0.5 KM · Slant Operating, LLC · Section with this well →
| Pennsylvanian | 7,278 | -4,721 |
| Pennsylvanian | 7,278 | -4,721 |
| Barnett | 8,182 | -5,625 |
| Devonian | 8,971 | -6,414 |
University -36A-42-103-33016
0.6 KM · Slant Operating, LLC · Section with this well →
| Grayburg | 3,047 | -489 |
| Glorieta | 4,253 | -1,695 |
| Pennsylvanian | 7,323 | -4,765 |
| Cisco | 7,505 | -4,947 |
| Canyon | 7,637 | -5,079 |
| Strawn | 7,816 | -5,258 |
| Atoka | 7,953 | -5,395 |
| Barnett | 8,105 | -5,547 |
9 TOPS · FIRST 8
Block 31 Unit42-103-32695
0.8 KM · OXY USA Inc. · Section with this well →
| Grayburg | 3,010 | -446 |
| Glorieta | 4,249 | -1,685 |
| Wolfcamp | 6,912 | -4,348 |
| Pennsylvanian | 7,222 | -4,658 |
| Cisco | 7,225 | -4,661 |
| Canyon | 7,561 | -4,997 |
| Strawn | 7,759 | -5,195 |
| Atoka | 7,854 | -5,290 |
11 TOPS · FIRST 8
University 36 B42-103-36153
0.9 KM · Slant Operating, LLC · Section with this well →
| Pennsylvanian | 7,220 | -4,679 |
| Atoka | 8,060 | -5,519 |
| Barnett | 8,272 | -5,731 |
| Devonian | 8,876 | -6,335 |
Block 31 Unit42-103-32569
0.9 KM · OXY USA Inc. · Section with this well →
| Wolfcamp | 6,920 | -4,358 |
| Cisco | 7,234 | -4,672 |
| Canyon | 7,576 | -5,014 |
| Atoka | 7,668 | -5,106 |
| Strawn | 7,779 | -5,217 |
| Barnett | 8,040 | -5,478 |
Block 31 Unit42-103-32415
1.2 KM · OXY USA Inc. · Section with this well →
| Wolfcamp | 6,883 | -4,326 |
| Cisco | 7,188 | -4,631 |
| Canyon | 7,497 | -4,940 |
| Strawn | 7,684 | -5,127 |
| Atoka | 7,782 | -5,225 |
| Barnett | 7,923 | -5,366 |
Block 31 Unit42-103-32485
1.3 KM · OXY USA Inc. · Section with this well →
| Grayburg | 2,990 | -426 |
| Glorieta | 4,183 | -1,619 |
| Pennsylvanian | 7,165 | -4,601 |
| Atoka | 7,220 | -4,656 |
| Mississipian | 7,868 | -5,304 |
| Devonian | 8,599 | -6,035 |
University 3542-103-32746
1.3 KM · Slant Operating, LLC · Section with this well →
| Queen | 2,865 | -377 |
| Grayburg | 2,976 | -488 |
| Glorieta | 4,214 | -1,726 |
| Strawn | 7,193 | -4,705 |
| Pennsylvanian | 7,193 | -4,705 |
| Mississippian | 7,923 | -5,435 |
| Mississippian | 7,923 | -5,435 |
| Barnett | 7,950 | -5,462 |
9 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/10333166, documented in the API reference.