WELL · 42-461-41955 · DISTRICT 7
Carbon 12-13 Unit 1 #121
Upton County · Horizontal
Carbon 12-13 Unit 1 #121 (API 42-461-41955) is a permitted horizontal well in Upton County filed by Endeavor Energy Resources L.P.; no completion report is on file yet.
The RRC has issued one drilling permit, issued November 10, 2021, permitted to 11,000 ft.
Completion filings report 12 formation tops, including Rustler, Yates, Grayburg, San Andres.
Its lease has reported 3.11M barrels of oil and 10.3M mcf of gas since March 2022, last reporting in July 2026. The lease carries 9 wells, so these are lease totals, not this well alone.
Operator of record
Endeavor Energy Resources L.P.
Midland, TX · P-5 Y, filed Apr 4, 2026 · 6,190 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Endeavor Energy Resources L.P.Nov 10, 2021 |
- 11,000
- total depth, ft
- 1
- permits on file
- Nov 10, 2021
- last permit issued
- —
- completed
- 3.11M
- cumulative oil, bbl
- 10.3M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- —
Surface location
31.592373, -102.133374
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Upton County.
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 |
|---|---|---|---|---|---|---|
| Carbon 12-13 Unit 1 O-9-21676 | Spraberry (Trend Area) | Diamondback E&P LLC | 9 | 3.11M | 10.3M | Mar 2022 – Jul 2026 |
Oil, barrels lease total
Last 12 months 295,717 · prior 12 440,429(-33%)
Gas, mcf lease total
Last 12 months 2,008,091 · prior 12 2,535,019(-21%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Aug 2022 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 874140-99 | Drill | Endeavor Energy Resources L.P. | Nov 1, 2021 | Nov 10, 2021 | Mar 8, 2022 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-21676 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,851 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 1,691 | 1,160 |
| Yates | 2,722 | 129 |
| Grayburg | 4,748 | -1,897 |
| San AndresSAN ANDRES - SALTWATER FLOW | 5,330 | -2,479 |
| Clear ForkCLEARFORK | 6,966 | -4,115 |
| Spraberry | 7,734 | -4,883 |
| Jo Mill | 8,569 | -5,718 |
| SpraberryLOWER SPRABERRY SHALE | 8,641 | -5,790 |
| Yates | 27,222 | -24,371 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
| Wolfcamp | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,295 | 19,213 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,430 | 17.5 | 1,004 S |
| 9.625 | 8,384 | 12.25 | 610 S |
| 5.5 | 19,337 | 8.5 | 1,990 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 25, 2023 | Apr 12, 2023 | Yes |
| 00 | Dec 13, 2022 | Oct 26, 2022 | — |
| 00 | Nov 2, 2022 | Jun 8, 2022 | 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 42-461-41955 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-41955 → 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.
Carbon 12-13 Unit 142-461-41956
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,677 | 1,174 |
| Yates | 2,722 | 129 |
| Grayburg | 4,777 | -1,926 |
| San Andres | 5,326 | -2,475 |
| Spraberry | 7,775 | -4,924 |
| Strawn | — | |
| Devonian | — | |
| Ellenburger | — |
10 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41959
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,676 | 1,175 |
| Yates | 2,722 | 129 |
| Grayburg | 4,750 | -1,899 |
| San Andres | 5,335 | -2,484 |
| Spraberry | 7,756 | -4,905 |
| Wolfcamp | — | |
| Devonian | — | |
| Ellenburger | — |
10 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41954
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,673 | 1,178 |
| Yates | 2,722 | 129 |
| Grayburg | 4,758 | -1,907 |
| San Andres | 5,329 | -2,478 |
| Glorieta | 6,105 | -3,254 |
| Clear Fork | 6,934 | -4,083 |
| Spraberry | 7,775 | -4,924 |
| Jo Mill | 8,587 | -5,736 |
16 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41951
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,674 | 1,177 |
| Yates | 2,722 | 129 |
| Grayburg | 4,745 | -1,894 |
| San Andres | 5,337 | -2,486 |
| Glorieta | 6,109 | -3,258 |
| Clear Fork | 6,986 | -4,135 |
| Spraberry | 7,762 | -4,911 |
| Jo Mill | 8,638 | -5,787 |
14 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41957
0.1 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,687 | 1,163 |
| Yates | 2,722 | 128 |
| Grayburg | 4,739 | -1,889 |
| San Andres | 5,328 | -2,478 |
| Glorieta | 6,081 | -3,231 |
| Clear Fork | 6,912 | -4,062 |
| Spraberry | 7,768 | -4,918 |
| Jo Mill | 8,583 | -5,733 |
14 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41961
0.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,680 | 1,170 |
| Yates | 2,722 | 128 |
| Grayburg | 4,779 | -1,929 |
| San Andres | 5,348 | -2,498 |
| Glorieta | 6,068 | -3,218 |
| Clear Fork | 6,972 | -4,122 |
| Spraberry | 7,738 | -4,888 |
| Jo Mill | 8,578 | -5,728 |
15 TOPS · FIRST 8
Carbon 12-13 Unit 142-461-41960
0.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Rustler | 1,651 | 1,199 |
| Yates | 2,722 | 128 |
| Grayburg | 4,762 | -1,912 |
| San Andres | 5,356 | -2,506 |
| Glorieta | 6,109 | -3,259 |
| Clear Fork | 6,946 | -4,096 |
| Spraberry | 7,775 | -4,925 |
| Jo Mill | 8,596 | -5,746 |
14 TOPS · FIRST 8
Fraser TXL H342-461-42570
0.3 KM · COG Operating LLC · Section with this well →
| Yates | 2,711 | 140 |
| Grayburg | 4,756 | -1,905 |
| San Andrews-Saltwater Flow | 4,803 | -1,952 |
| San Andres | 4,803 | -1,952 |
| Spraberry | 7,699 | -4,848 |
| Spayberry | 7,699 | -4,848 |
| Fusselman | — | |
| Ellenburger | — |
11 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/46141955, documented in the API reference.