WELL · 42-235-35712 · DISTRICT 7
University Unit 5-20-21 #1SW
Irion County · Lin (Wolfcamp) field · Injection · Vertical
University Unit 5-20-21 #1SW (API 42-235-35712) is a well in Irion County operated by Diamondback E&P LLC, completed September 8, 2014 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit, issued February 26, 2014, permitted to 11,000 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 7 formation tops, including Grayburg, San Andres, Clear Fork, Spraberry.
Its lease has reported 1.08M barrels of oil and 13.6M mcf of gas since March 2013, last reporting in July 2026. The lease carries 9 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 22K barrels injected in the 12 months reported through December 2025.
Operator of record
Permitted by Endeavor Energy Resources L.P.; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,237 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Endeavor Energy Resources L.P.Feb 26, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 1
- permits on file
- Feb 26, 2014
- last permit issued
- Sep 8, 2014
- completed
- 1.08M
- cumulative oil, bbl
- 13.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2013 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 8, 2014
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
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 lease 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 Unit '5-20-21' O-9-18281 | Lin (Wolfcamp) | Diamondback E&P LLC | 9 | 1.08M | 13.6M | Mar 2013 – Jul 2026 |
Gas, mcf lease total
Last 12 months 678,571 · prior 12 784,488(-14%)
Oil, barrels lease total
Last 12 months 12,474 · prior 12 16,629(-25%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Mar 2013 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 780025-99 | Drill | Endeavor Energy Resources L.P. | Feb 18, 2014 | Feb 26, 2014 | Apr 9, 2014 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-18281 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,674 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Grayburg | 950 | 1,724 |
| San Andres | 1,100 | 1,574 |
| Clear ForkCLEARFORK | 2,700 | -26 |
| Spraberry | 3,200 | -526 |
| Wolfcamp | 4,200 | -1,526 |
| Canyon | 5,700 | -3,026 |
| Fusselman | 8,500 | -5,826 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,953 | 9,767 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 833 | 17.5 | 800 S |
| 8.625 | 4,300 | 12.25 | 1,155 S |
| 5.5 | 8,953 | 8.75 | 1,500 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 →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Feb 5, 2015 | Dec 11, 2014 | Yes |
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 42-235-35712 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-235-35712 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 22K
- bbl, last 12 reported months
- 1.32M
- bbl, all reported
- Dec 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000108965 | W-14 Disposal | Active | 7,000 | 3,870 | 8,850–9,900 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 21,978 · prior 12 19,496(+13%)
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/23535712, documented in the API reference.