WELL · 42-461-03905 · DISTRICT 7
Pegasus Ellenburger Unit #2301
Upton County · Pegasus (Ellenburger) field · Vertical
Pegasus Ellenburger Unit #2301 (API 42-461-03905) is a well in Upton County operated by Xto Energy Inc., completed April 10, 2002.
The RRC has issued one drilling permit, issued September 9, 2010, permitted to 13,200 ft.
It was permitted by Cog Operating LLC and has since transferred to Xto Energy Inc. on the wellbore schedule.
Completion filings report 4 formation tops, including Clear Fork, Spraberry, Dean, Wolfcamp.
Its 3 leases have reported 34.3M barrels of oil and 179M mcf of gas since January 1993, last reporting in July 2026. The leases carry 235 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by COG Operating LLC; the EWA schedule now lists a different operator.
Spring, TX · P-5 Y, filed Feb 4, 2026 · 16,156 permits on file · (832) 625-1100
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | XTO Energy Inc. |
| Production reports | COG Operating LLCthrough Apr 2026 |
| Latest permit | COG Operating LLCSep 9, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,200
- total depth, ft
- 1
- permits on file
- Sep 9, 2010
- last permit issued
- Apr 10, 2002
- completed
- 34.3M
- cumulative oil, bbl
- 179M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 10, 2002
- 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 3 leases this well is completed on; they carry 235 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Pegasus Ellenburger Unit O-9-1175 | Pegasus (Ellenburger) | XTO Energy Inc. | 89 | 3.9M | 36.2M | Jan 1993 – Jul 2026 |
| Pegasus Field Unit 3 O-9-17154 | Pegasus (Consolidated) | COG Operating LLC | 145 | 30.4M | 143M | May 2010 – Jul 2026 |
| Pegasus Ellenburger Unit O-9-17190 | Pegasus (Ellenburger) | COG Operating LLC | 1 | 0 | 0 | Jun 2010 – Jul 2012 |
Gas, mcf lease total
Last 12 months 10,624,621 · prior 12 11,562,373(-8%)
Oil, barrels lease total
Last 12 months 786,602 · prior 12 1,019,872(-23%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mobil Producing TX. & N.M. Inc.Jan 1993 → Dec 2011
- 2COG Operating LLCMay 2010 → Apr 2026
- 3XTO Energy Inc.Jan 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 701816-99 | Recompletion | COG Operating LLC | Sep 7, 2010 | Sep 9, 2010 | Aug 11, 2010 | 13,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-1175 | — | — | — | — |
| — | — O-9-17154 | — | — | — | — |
| — | — O-9-17190 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,875 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,030 | 9,815 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 453 | 17.5 | 450 S |
| 13.375 | 471 | — | — |
| 13.375 | 472 | 12.25 | 450 S |
| 13.375 | 472 | — | — |
| 9.625 | 4,769 | 12.25 | 4,500 S |
| 9.625 | 4,769 | — | 4,500 S |
| 7.625 | 9,250 | 8.75 | 1,300 S |
| 7.625 | 9,250 | — | 1,300 S |
| 5.5 | 13,198 | — | — |
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 | Jul 3, 2012 | Feb 24, 2011 | Yes |
| 00 | Jul 14, 2010 | Aug 6, 2003 | — |
| 00 | Aug 22, 2003 | Aug 6, 2003 | — |
| 00 | Sep 19, 1989 | Aug 28, 1989 | — |
| 00 | Jan 12, 1984 | — | — |
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 42-461-03905 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-03905 → 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/46103905, documented in the API reference.