WELL · 42-461-37623 · DISTRICT 7
TXL West 35 #12
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Txl West 35 #12 (API 42-461-37623) is a well in Upton County operated by Firebird Energy II LLC, completed January 18, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended twice), issued September 6, 2011, permitted to 11,500 ft.
It was permitted by Cog Operating LLC and has since transferred to Firebird Energy II LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Spraberry, Dean, Wolfcamp, L. Wolfcamp.
Its lease has reported 833K barrels of oil and 3.27M mcf of gas since July 2011, last reporting in July 2026. The lease carries 11 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.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Aug 12, 2024
- Permits on file
- 272
- Phone
- (817) 857-7800
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Firebird Energy II LLC |
| Production reports | Firebird Energy II LLCthrough Apr 2026 |
| Latest permit | COG Operating LLCSep 6, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,500
- total depth, ft
- 3
- permits on file
- Sep 6, 2011
- last permit issued
- Jan 18, 2012
- completed
- 833K
- cumulative oil, bbl
- 3.27M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 18, 2012
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 11 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| TXL West "35" O-9-17566 | Spraberry (Trend Area) | Firebird Energy II LLC | 11 | 833K | 3.27M | Jul 2011 – Jul 2026 |
Oil, barrels lease total
Last 12 months 9,763 · prior 12 18,380(-47%)
Gas, mcf lease total
Last 12 months 49,217 · prior 12 101,645(-52%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCJul 2011 → Sep 2024
- 2Firebird Energy II LLCOct 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 723517-97 | Drill | COG Operating LLC | Oct 19, 2011 | Sep 6, 2011 | Oct 27, 2011 | 11,500 |
| 723517-98 | Drill | COG Operating LLC | Sep 14, 2011 | Sep 6, 2011 | — | 11,000 |
| 723517-99 | Drill | COG Operating LLC | Sep 1, 2011 | Sep 6, 2011 | Oct 27, 2011 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-17566 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,810 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,745 | 10,310 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 815 | 12.25 | 430 S |
| 5.5 | 10,545 | 7.875 | 805 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 | Mar 28, 2013 | Mar 26, 2012 | 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 42-461-37623 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-37623 → 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/46137623, documented in the API reference.