WELL · 42-461-38686 · DISTRICT 7
McElroy Ranch Co. -F- #31D
Upton County · Block 42 (Penn) field · Vertical
Mcelroy Ranch CO. -F- #31D (API 42-461-38686) is a well in Upton County operated by Diamondback E&P LLC, completed September 25, 2016.
The RRC has issued one drilling permit (amended once), issued March 18, 2013, permitted to 5,500 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Rustler, Yates, Grayburg, San Andres.
Its 2 leases have reported 372K barrels of oil and 5.39M mcf of gas since January 1993, last reporting in July 2026. The leases carry 24 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 214K barrels injected in the 12 months reported through August 2025.
Operator of record
Permitted by Devon Energy Production Co, 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 | Devon Energy Production Co, L.P.Mar 18, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,500
- total depth, ft
- 2
- permits on file
- Mar 18, 2013
- last permit issued
- Sep 25, 2016
- completed
- 372K
- cumulative oil, bbl
- 5.39M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 25, 2016
- 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 24 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| McElroy Ranch Co. -F- O-9-2590 | Block 42 (Penn) | Diamondback E&P LLC | 23 | 372K | 5.39M | Jan 1993 – Jul 2026 |
| McElroy Ranch Co - F - SWD O-9-22031 | Block 42 (Penn) | Deep Blue Operating I LLC | 1 | 0 | 0 | Dec 2022 – Jul 2026 |
Gas, mcf lease total
Last 12 months 77,914 · prior 12 32,450(+140%)
Oil, barrels lease total
Last 12 months 3,560 · prior 12 1,472(+142%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pennzoil Petroleum CompanyJan 1993 → Jan 1995
- 2Pennzoil Exploration & Prod. Co.Feb 1995 → Sep 1995
- 3Umc Petroleum CorporationOct 1995 → Jul 1998
- 4Ocean Energy, Inc.Aug 1998 → Aug 2003
- 5Devon Louisiana CorporationSep 2003 → Dec 2005
- 6Devon Energy Production Co, L.P.Jan 2006 → Jul 2016
- 7FDL Operating, LLCAug 2016 → Jun 2019
- 8Firebird Energy LLCJul 2019 → Nov 2022
- 9Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 758770-98 | Drill | Devon Energy Production Co, L.P. | Apr 1, 2013 | Mar 18, 2013 | Apr 22, 2013 | 5,500 |
| 758770-99 | Drill | Devon Energy Production Co, L.P. | Mar 15, 2013 | Mar 18, 2013 | Apr 22, 2013 | 5,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-2590 | — | — | — | — |
| — | — O-9-22031 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,731 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 1,589 | 1,142 |
| Yates | 2,820 | -89 |
| Grayburg | 4,170 | -1,439 |
| San Andres | 4,374 | -1,643 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,385 | 5,373 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 480 | 17.5 | 740 S |
| 8.625 | 4,195 | 11 | 1,305 S |
| 5.5 | 5,500 | 7.875 | 520 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 | Apr 24, 2023 | Apr 18, 2017 | — |
| 00 | Apr 19, 2017 | Apr 18, 2017 | — |
| 00 | Sep 5, 2014 | Jan 6, 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 42-461-38686 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-38686 → 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
- 214K
- bbl, last 12 reported months
- 1.75M
- bbl, all reported
- Aug 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000108110 | H-1 Injection | Active | 15,000 | 2,175 | 4,350–5,410 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 214,153 · prior 12 379,269(-44%)
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/46138686, documented in the API reference.