TEXAS · WELLS · UPTON COUNTY · API 42-461-33966 · DISTRICT 6E
Firefly B #1
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Firefly B #1 (API 42-461-33966) is a well in Upton County operated by Discovery Operating Inc., completed March 9, 1999 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued December 28, 1998, permitted to 10,225 ft.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its 2 leases have reported 60.8K barrels of oil and 128K mcf of gas since March 1999, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 31, 2026
- Permits on file
- 712
- Phone
- (432) 683-5203
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Discovery Operating Inc. |
| Production reports | Discovery Operating, Inc.through Apr 2026 |
| Latest permit | Discovery Operating, Inc.Dec 28, 1998 |
- 10,225
- total depth, ft
- 1
- permits on file
- Dec 28, 1998
- last permit issued
- Mar 9, 1999
- completed
- 60.8K
- cumulative oil, bbl
- 128K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 1999 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 9, 1999
- 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 2 leases this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Firefly B O-9-20615 | Spraberry (Trend Area) | Discovery Operating, Inc. | 1 | 4.34K | 2.52K | Dec 2019 – Jul 2026 |
| Firefly B O-9-14876 | Dai (Wolfcamp) | Discovery Operating, Inc. | 2 | 56.4K | 125K | Mar 1999 – Nov 2019 |
Oil, barrels lease total
Last 12 months 518 · prior 12 636(-19%)
Gas, mcf lease total
Last 12 months 330 · prior 12 429(-23%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Discovery Operating, Inc.Mar 1999 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 481656-99 | Drill | Discovery Operating, Inc. | Dec 21, 1998 | Dec 28, 1998 | Jan 11, 1999 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 9, 1999 | Firefly B O-9-20615 | Spraberry (Trend Area) | Discovery Operating Inc. | Producing | 10,225 |
| Mar 9, 1999 | Firefly B O-9-14876 | Dai (Wolfcamp) | Discovery Operating Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,856 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,717 | 9,793 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 422 | 17.5 | 380 S |
| 8.625 | 4,982 | 11 | 800 S |
| 5.5 | 10,144 | 7.875 | 475 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 | Feb 28, 2020 | Feb 20, 2020 | — |
| 00 | Feb 21, 2020 | Feb 20, 2020 | — |
| 00 | May 11, 1999 | Apr 5, 1999 | Yes |
| 00 | Apr 23, 1999 | — | — |
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 42-461-33966 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-33966 → 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/46133966, documented in the API reference.