TEXAS · WELLS · UPTON COUNTY · HALFFEAST36SW LEASE · API 42-461-36335 · DISTRICT 6E
HALFFEAST36SW #1
Upton County · Blue Danube (Strawn) field · Producing · Vertical
Halffeast36sw #1 (API 42-461-36335) is a well in Upton County operated by Diamondback E&P LLC, completed January 12, 2010 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 15, 2009, permitted to 11,090 ft.
It was permitted by Cog Operating LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Spraberry, Dean, Wolfcamp, Base Big Lime.
Its lease has reported 38.2K barrels of oil and 166K mcf of gas since October 2009, last reporting in July 2026.
Operator of record
Permitted by COG Operating LLC; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,243
- Phone
- (432) 221-7400
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 | COG Operating LLCJul 15, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,090
- total depth, ft
- 1
- permits on file
- Jul 15, 2009
- last permit issued
- Jan 12, 2010
- completed
- 38.2K
- cumulative oil, bbl
- 166K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2009 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 12, 2010
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| HALFFEAST36SW O-9-17061 | Blue Danube (Strawn) | Diamondback E&P LLC | 1 | 38.2K | 166K | Oct 2009 – Jul 2026 |
Gas, mcf lease total
Last 12 months 5,564 · prior 12 3,807(+46%)
Oil, barrels lease total
Last 12 months 626 · prior 12 787(-20%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCOct 2009 → Jun 2018
- 2TRP Operating LLCJul 2018 → Dec 2024
- 3Diamondback E&P LLCFeb 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 682904-99 | Drill | COG Operating LLC | Jul 9, 2009 | Jul 15, 2009 | Aug 18, 2009 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 12, 2010 | HALFFEAST36SW O-9-17061 | Blue Danube (Strawn) | Diamondback E&P LLC | Producing | 11,090 |
Formation tops
As filed on W-2/G-1. Subsea from 2,694 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,530 | 10,365 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 510 | 12.25 | 315 S |
| 5.5 | 11,090 | 8.75 | 940 S |
| 5.5 | — | 8.75 | 850 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 23, 2010 | Jan 25, 2010 | Yes |
| 00 | Feb 5, 2010 | — | — |
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 42-461-36335 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-36335 → 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/46136335, documented in the API reference.