WELL · 42-461-38681 · DISTRICT 8
Upton Z Fee #21W
Upton County · Concho Bluff North (Queen) field · Injection · Vertical
Upton Z Fee #21W (API 42-461-38681) is a well in Upton County operated by Diamondback E&P LLC, completed September 11, 2014 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued March 20, 2013, permitted to 5,000 ft.
It was permitted by Chevron U. S. A. Inc. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Rustler, Yates, Seven Rivers, Queen.
Its lease has reported 2.8M barrels of oil and 2.8K mcf of gas since November 1994, last reporting in July 2026. The lease carries 28 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 56.2K barrels injected in the 12 months reported through October 2025.
Operator of record
Permitted by Chevron U. S. A. Inc.; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,231 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 | Chevron U. S. A. Inc.Mar 20, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,000
- total depth, ft
- 2
- permits on file
- Mar 20, 2013
- last permit issued
- Sep 11, 2014
- completed
- 2.8M
- cumulative oil, bbl
- 2.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 1994 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 11, 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 28 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Upton 'Z' Fee O-10-34334 | Concho Bluff, North (Queen) | Diamondback E&P LLC | 28 | 2.8M | 2.8K | Nov 1994 – Jul 2026 |
Oil, barrels lease total
Last 12 months 8,607 · prior 12 11,380(-24%)
Gas, mcf lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Texaco E & P Inc.Nov 1994 → May 2002
- 2Chevron U. S. A. Inc.Jun 2002 → Jan 2022
- 3Firebird Energy LLCFeb 2022 → Nov 2022
- 4Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 758496-98 | Drill | Chevron U. S. A. Inc. | Sep 30, 2013 | Mar 20, 2013 | Jul 30, 2013 | 5,000 |
| 758496-99 | Drill | Chevron U. S. A. Inc. | Mar 12, 2013 | Mar 20, 2013 | Jul 30, 2013 | 5,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-34334 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,892 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 1,831 | 1,061 |
| Yates | 3,052 | -160 |
| Seven Rivers | 3,825 | -933 |
| Queen | 4,201 | -1,309 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,204 | 4,224 | Perforated |
| 4,204 | 4,472 | Perforated |
| 4,442 | 4,472 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 456 | 11 | 400 S |
| 5.5 | 4,636 | 7.875 | 980 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 | Dec 30, 2015 | Dec 7, 2015 | — |
| 00 | Oct 20, 2014 | Mar 31, 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 42-461-38681 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-38681 → 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
- 56.2K
- bbl, last 12 reported months
- 1.95M
- bbl, all reported
- Oct 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000108090 | H-1 Injection | Active | 1,500 | 2,000 | 4,000–4,500 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 56,165 · prior 12 27,537(+104%)
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/46138681, documented in the API reference.