WELL · 42-461-31616 · DISTRICT 7
Halff -C- #1
Upton County · Spraberry (Trend Area CL. Fk.) field · Vertical
Halff -C- #1 (API 42-461-31616) is a plugged well in Upton County, plugged April 30, 2021, last operated by Apache Corporation.
The RRC has issued 2 drilling permits between 1980 and 1998, permitted to 8,000 ft.
It was permitted by Tamarack Petroleum Company, Inc. and has since transferred to Apache Corporation on the wellbore schedule.
Completion filings report 2 formation tops, including Clear Fork, Spraberry.
Its 2 leases have reported 22.3K barrels of oil and 151K mcf of gas since January 1993, last reporting in September 2021. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Tamarack Petroleum Company, Inc.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 9,754 permits on file · (713) 296-6400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Apache Corporationthrough Mar 2018 |
| Latest permit | Tamarack Petroleum Company, Inc.Mar 30, 1998 |
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
- 2
- permits on file
- Mar 30, 1998
- last permit issued
- Apr 19, 1998
- completed
- 22.3K
- cumulative oil, bbl
- 151K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Sep 2021
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 19, 1998
- Shut in
- —
- Plugged
- Apr 30, 2021
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Halff -C- O-9-14810 | Spraberry (Trend Area CL. Fk.) | Apache Corporation | 1 | 18.7K | 104K | Aug 1998 – Sep 2021 |
| Halff -C- O-9-8587 | Spraberry (Trend Area) | Tamarack Petroleum Company, Inc. | 1 | 3.58K | 47K | Jan 1993 – Oct 1998 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Kaiser-Francis Oil CompanyJan 1993 → Feb 1997
- 2Tamarack Petroleum Company, Inc.Mar 1997 → Nov 2007
- 3Mariner Energy, Inc.Dec 2007 → Nov 2010
- 4Apache CorporationDec 2010 → Mar 2018
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 474769-99 | Recompletion | Tamarack Petroleum Company, Inc. | Mar 26, 1998 | Mar 30, 1998 | Apr 14, 1998 | 7,850 |
| 88290-99 | Drill | Coquina Oil Corporation | Jul 30, 1980 | Jul 30, 1980 | Aug 27, 1980 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-8587 | — | — | — | — |
| — | — O-9-14810 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,649 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear ForkUPPER CLEARFORK | 5,788 | -3,139 |
| Clear ForkLOWER CLEARFORK | 6,354 | -3,705 |
| SpraberryUPPER SPRABERRY | 6,726 | -4,077 |
| SpraberryLOWER SPRABERRY | 7,658 | -5,009 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,788 | 6,354 | Perforated |
| 6,726 | 7,658 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 472 | 12.25 | 350 S |
| 2.375 | 7,527 | — | — |
| 4.5 | 7,832 | 7.875 | 900 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 | Sep 15, 1998 | Aug 20, 1998 | Yes |
| 00 | Aug 25, 1998 | — | — |
| 00 | Jan 12, 1984 | Nov 13, 1980 | — |
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 42-461-31616 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-31616 → 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/46131616, documented in the API reference.