WELL · 42-461-43004 · DISTRICT 9
Big Bertha 0310 E #502H
Upton County · Spraberry (Trend Area) field · Producing · Horizontal
Big Bertha 0310 E #502H (API 42-461-43004) is a horizontal well in Upton County operated by Firebird Energy II LLC, completed August 17, 2025 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued October 30, 2024, permitted to 9,800 ft.
Completion filings report 9 formation tops, including Yates, Grayburg, San Andres, Spraberry.
Its lease has reported 130K barrels of oil and 145K mcf of gas since August 2025, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Fort Worth, TX · P-5 Y, filed May 4, 2026 · 272 permits on file · (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 | Firebird Energy II LLCOct 30, 2024 |
- 9,800
- total depth, ft
- 2
- permits on file
- Oct 30, 2024
- last permit issued
- Aug 17, 2025
- completed
- 130K
- cumulative oil, bbl
- 145K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2025 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 17, 2025
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
31.577575, -102.272938
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Big Bertha 0310 E O-9-23528 | Spraberry (Trend Area) | Firebird Energy II LLC | 2 | 130K | 145K | Aug 2025 – Jul 2026 |
Oil, barrels lease total
Last 12 months 129,581 · prior 12 0
Gas, mcf lease total
Last 12 months 145,066 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Firebird Energy II LLCJan 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 903621-98 | Drill | Firebird Energy II LLC | Jun 2, 2025 | Oct 30, 2024 | — | 9,800 |
| 903621-99 | Drill | Firebird Energy II LLC | Oct 29, 2024 | Oct 30, 2024 | Jul 10, 2025 | 9,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-23528 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,882 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,020 | -138 |
| Grayburg | 3,853 | -971 |
| Yates | 4,162 | -1,280 |
| Grayburg | 4,502 | -1,620 |
| San AndresSAN ANDRES - SALTWATER FLOW | 4,575 | -1,693 |
| San AndresSAN ANDRES - SALTWATER FLOW | 7,096 | -4,214 |
| Spraberry | 7,754 | -4,872 |
| Spraberry | 8,180 | -5,298 |
| Wolfcamp | 9,071 | -6,189 |
| Wolfcamp | 9,102 | -6,220 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,003 | 20,560 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,250 | 17.5 | 985 S |
| 8.625 | 9,095 | 11 | 935 S |
| 6 | 20,593 | 7.875 | 2,350 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 | Jul 30, 2026 | Jul 7, 2026 | — |
| 00 | Apr 14, 2026 | Feb 25, 2026 | 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 42-461-43004 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-43004 → 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.
Big Bertha 0310 D42-461-43006
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 2,977 | -95 |
| Grayburg | 3,840 | -958 |
| San Andres | 4,497 | -1,615 |
| Spraberry | 7,768 | -4,886 |
| Devonian | — | |
| Ellenburger | — | |
| Wolfcamp | — | |
| Strawn | — |
9 TOPS · FIRST 8
Big Bertha 0310 E42-461-43007
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,035 | -153 |
| Grayburg | 4,223 | -1,341 |
| San Andres | 4,497 | -1,615 |
| Spraberry | 7,799 | -4,917 |
| Devonian | — | |
| Ellenburger | — | |
| Wolfcamp | — | |
| Strawn | — |
9 TOPS · FIRST 8
Big Bertha 0310 F42-461-43008
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,018 | -125 |
| Grayburg | 4,197 | -1,304 |
| San Andres | 4,512 | -1,619 |
| Spraberry | 7,767 | -4,874 |
| Wolfcamp | 9,006 | -6,113 |
| Devonian | — | |
| Strawn | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Big Bertha 0310 F42-461-43009
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,043 | -150 |
| Grayburg | 4,145 | -1,252 |
| San Andres | 4,507 | -1,614 |
| Spraberry | 7,796 | -4,903 |
| Strawn | — | |
| Wolfcamp | — | |
| Fusselman | — | |
| Ellenburger | — |
9 TOPS · FIRST 8
Big Bertha 0310 G42-461-43010
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,031 | -138 |
| Grayburg | 4,218 | -1,325 |
| San Andres | 4,492 | -1,599 |
| Spraberry | 7,771 | -4,878 |
| Wolfcamp | 9,069 | -6,176 |
| Ellenburger | — | |
| Strawn | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Big Bertha 0310 G42-461-43011
0.0 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,039 | -146 |
| Grayburg | 4,197 | -1,304 |
| San Andres | 4,497 | -1,604 |
| Spraberry | 7,768 | -4,875 |
| Ellenburger | — | |
| Wolfcamp | — | |
| Strawn | — | |
| Devonian | — |
9 TOPS · FIRST 8
Big Bertha 0310 C42-461-42862
0.5 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,017 | -127 |
| Grayburg | 3,848 | -958 |
| San Andres | 4,502 | -1,612 |
| Spraberry | 7,800 | -4,910 |
| Wolfcamp | 9,022 | -6,132 |
| Fusselman | — | |
| Ellenburger | — | |
| Devonian | — |
9 TOPS · FIRST 8
Big Bertha 0310 C42-461-42861
0.5 KM · Firebird Energy II LLC · Section with this well →
| Yates | 3,015 | -125 |
| Grayburg | 3,846 | -956 |
| San Andres | 4,497 | -1,607 |
| Spraberry | 7,799 | -4,909 |
| Wolfcamp | — | |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 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/46143004, documented in the API reference.