WELL · 42-003-35628 · DISTRICT 8
University 173 #J 18
Andrews County · Shafter Lake (Ellenburger) field · Vertical
University 173 #J 18 (API 42-003-35628) is a well in Andrews County operated by Highmark Energy Operating LLC, completed January 16, 1987.
The RRC has issued 2 drilling permits between 1986 and 1993, permitted to 11,850 ft.
It was permitted by Henry Petroleum Corp. and has since transferred to Highmark Energy Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including San Andres, Clear Fork, Wolfcamp, Devonian.
Its 2 leases have reported 661K barrels of oil and 330K mcf of gas since January 1993, last reporting in July 2026. The leases carry 17 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Henry Petroleum Corp.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Dec 4, 2025 · 23 permits on file · (903) 876-2591
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Highmark Energy Operating LLC |
| Production reports | Highmark Energy Operating, LLCthrough Apr 2026 |
| Latest permit | Henry Petroleum Corp.Nov 16, 1993 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,850
- total depth, ft
- 2
- permits on file
- Nov 16, 1993
- last permit issued
- Jan 16, 1987
- completed
- 661K
- cumulative oil, bbl
- 330K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 16, 1987
- 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 2 leases this well is completed on; they carry 17 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University 141A ,173 O-10-5504 | Shafter Lake (Devonian) | Highmark Energy Operating, LLC | 15 | 541K | 315K | Jan 1993 – Jul 2026 |
| University 173 O-10-28762 | Shafter Lake (Ellenburger) | Highmark Energy Operating, LLC | 2 | 119K | 14.7K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 4,608 · prior 12 4,748(-3%)
Gas, mcf lease total
Last 12 months 134 · prior 12 626(-79%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Henry Petroleum Corp.Jan 1993 → Mar 2001
- 2Henry Petroleum LPApr 2001 → Dec 2008
- 3COG Operating LLCJan 2009 → Dec 2012
- 4Legacy Reserves Operating LPJan 2013 → Aug 2020
- 5Highmark Energy Operating, LLCJul 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 418287-99 | Recompletion | Henry Petroleum Corp. | Nov 16, 1993 | Nov 16, 1993 | Nov 18, 1993 | 11,731 |
| 320685-99 | Drill | Arco Oil & Gas Co. | Sep 17, 1986 | Sep 22, 1986 | — | 11,850 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-5504 | — | — | — | — |
| — | — O-10-28762 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,227 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 4,487 | -1,260 |
| Clear ForkCLEARFORK | 5,810 | -2,583 |
| Wolfcamp | 8,032 | -4,805 |
| Devonian | 9,388 | -6,161 |
| Ellenburger | 11,675 | -8,448 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,569 | 9,729 | Perforated |
| 11,660 | 11,705 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 370 | 17.5 | 350 S |
| 9.625 | 4,300 | 12.25 | 2,300 S |
| 7 | 11,731 | 8.75 | 2,150 S |
| 7 | 11,735 | 8.75 | 2,150 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 | May 20, 1994 | Mar 28, 1994 | Yes |
| 00 | Apr 11, 1994 | Jan 29, 1987 | Yes |
| 00 | Feb 19, 1987 | Jan 29, 1987 | Yes |
| 00 | Feb 10, 1987 | — | — |
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 42-003-35628 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-35628 → 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.
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/00335628, documented in the API reference.