WELL · 42-395-30553 · DISTRICT 3
Blacktail Unit #1
Robertson County · Giddings (Buda) field · Horizontal
Blacktail Unit #1 (API 42-395-30553) is a horizontal well in Robertson County operated by Union Pacific Resources Company, completed February 1, 1998.
The RRC has issued one drilling permit, issued November 26, 1997, permitted to 8,000 ft.
Completion filings report 5 formation tops, including Austin Chalk, False Buda, Buda, Del Rio.
Its 2 leases have reported 520K barrels of oil and 396K mcf of gas since February 1998, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Union Pacific Resources Company
Fort Worth, TX · P-5 Y, filed Feb 9, 2001 · 5,638 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Union Pacific Resources Company |
| Production reports | Wildfire Energy Operating LLCthrough Mar 2026 |
| Latest permit | Union Pacific Resources CompanyNov 26, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,000
- total depth, ft
- 1
- permits on file
- Nov 26, 1997
- last permit issued
- Feb 1, 1998
- completed
- 520K
- cumulative oil, bbl
- 396K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 1998 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 1, 1998
- 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 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 |
|---|---|---|---|---|---|---|
| Blacktail Unit O-3-23564 | Giddings (Austin Chalk-3) | Wildfire Energy Operating LLC | 2 | 455K | 363K | Aug 1998 – Jul 2026 |
| Blacktail Unit O-3-23474 | Giddings (Buda) | Union Pacific Resources Company | 1 | 64.2K | 33.2K | Feb 1998 – Nov 1998 |
Oil, barrels lease total
Last 12 months 10,590 · prior 12 11,898(-11%)
Gas, mcf lease total
Last 12 months 4,871 · prior 12 5,248(-7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Pacific Resources CompanyFeb 1998 → Jan 2001
- 2Rme Petroleum CompanyFeb 2001 → Nov 2002
- 3Anadarko E&P Company LPDec 2002 → Dec 2012
- 4Anadarko E&P Onshore LLCJan 2013 → Jun 2017
- 5Wildhorse Resources Mngt Co, LLCJul 2017 → May 2019
- 6Chesapeake Operating, L.L.C.Jun 2019 → Feb 2023
- 7Wildfire Energy Operating LLCMar 2023 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 470595-99 | Drill | Union Pacific Resources Company | Nov 26, 1997 | Nov 26, 1997 | Nov 28, 1997 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-23474 | — | — | — | — |
| — | — O-3-23564 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 253 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin ChalkBASE AUSTIN CHALK | 6,725 | -6,472 |
| False Buda | 7,099 | -6,846 |
| Buda | 7,124 | -6,871 |
| Del Rio | 7,179 | -6,926 |
| Georgetown | 7,197 | -6,944 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,118 | 11,926 | Perforated |
| 7,118 | 13,285 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,200 | 14.75 | 490 S |
| 7.625 | 7,588 | 9.875 | 455 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 | Oct 1, 1998 | Sep 16, 1998 | Yes |
| 00 | Sep 30, 1998 | Jun 5, 1998 | — |
| 00 | Sep 23, 1998 | — | — |
| 00 | Jun 17, 1998 | Mar 30, 1998 | Yes |
| 00 | Jun 8, 1998 | — | — |
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 42-395-30553 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-395-30553 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/39530553, documented in the API reference.