TEXAS · WELLS · UPTON COUNTY · HALFF12 LEASE · API 42-461-38064 · DISTRICT 6E
HALFF12 #1
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Halff12 #1 (API 42-461-38064) is a well in Upton County operated by Diamondback E&P LLC, completed July 31, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 3, 2012, permitted to 10,400 ft.
It was permitted by Cog Operating LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its lease has reported 58.1K barrels of oil and 141K mcf of gas since May 2005, last reporting volume in April 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
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
- 5,251
- 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 LLCMay 3, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,400
- total depth, ft
- 1
- permits on file
- May 3, 2012
- last permit issued
- Jul 31, 2012
- completed
- 58.1K
- cumulative oil, bbl
- 141K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2005 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 31, 2012
- 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; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| HALFF12 O-9-15732 | Spraberry (Trend Area) | Diamondback E&P LLC | 2 | 58.1K | 141K | May 2005 – Apr 2026 |
Oil, barrels lease total
Last 12 months 1,085 · prior 12 1,575(-31%)
Gas, mcf lease total
Last 12 months 4,703 · prior 12 1,254(+275%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Henry Petroleum LPMay 2005 → Dec 2008
- 2COG Operating LLCJan 2009 → Jun 2018
- 3TRP Operating LLCJul 2018 → Jan 2025
- 4Diamondback E&P LLCFeb 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 738692-99 | Drill | COG Operating LLC | Apr 19, 2012 | May 3, 2012 | Jun 8, 2012 | 10,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 31, 2012 | HALFF12 O-9-15732 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,400 |
Formation tops
As filed on W-2/G-1. Subsea from 2,692 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,533 | 10,088 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 818 | 12.25 | 430 S |
| 5.5 | 10,400 | 7.875 | 918 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 31, 2013 | Oct 31, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 10, 2015. Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Spraberry, Dean, Wolfcamp | TIFF | 4,000 to 10,349 | Jun 10, 2015run Jun 28, 2012 | 3.88 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-461-38064 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-38064 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/46138064, documented in the API reference.