WELL · 42-461-36100 · DISTRICT 7
HALFFEAST12SW #1
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Halffeast12sw #1 (API 42-461-36100) is a well in Upton County operated by Diamondback E&P LLC, completed March 24, 2009 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 26, 2008, permitted to 10,800 ft.
It was permitted by Henry Petroleum LP and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including T. Clearfork, T. Spraberry, T. Dean, T. Wolfcamp.
Its lease has reported 40K barrels of oil and 193K mcf of gas since February 2009, last reporting in July 2026.
Operator of record
Permitted by Henry Petroleum LP; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,231 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Henry Petroleum LPSep 26, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,800
- total depth, ft
- 1
- permits on file
- Sep 26, 2008
- last permit issued
- Mar 24, 2009
- completed
- 40K
- cumulative oil, bbl
- 193K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2009 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 24, 2009
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| HALFFEAST12SW O-9-16898 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 40K | 193K | Feb 2009 – Jul 2026 |
Oil, barrels lease total
Last 12 months 994 · prior 12 1,042(-5%)
Gas, mcf lease total
Last 12 months 8,230 · prior 12 4,328(+90%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCMar 2009 → Jun 2018
- 2TRP Operating LLCJul 2018 → Jan 2025
- 3Diamondback E&P LLCFeb 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 670953-99 | Drill | Henry Petroleum LP | Sep 11, 2008 | Sep 26, 2008 | Dec 29, 2008 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-16898 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,691 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| T. Clearfork | 4,255 | -1,564 |
| T. Spraberry | 6,990 | -4,299 |
| T. Dean | 8,315 | -5,624 |
| T. Wolfcamp | 8,430 | -5,739 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,525 | 9,995 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 517 | 12.25 | 315 S |
| 5.5 | 10,178 | 8.75 | 920 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 | Aug 20, 2009 | May 6, 2009 | — |
| 00 | Jun 16, 2009 | Apr 22, 2009 | Yes |
| 00 | May 7, 2009 | — | — |
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 42-461-36100 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-36100 → 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/46136100, documented in the API reference.