TEXAS · WELLS · UPTON COUNTY · HALFF ESTATE "20" LEASE · API 42-461-30707 · DISTRICT 6E
Halff Estate 20 #4
Upton County · Amacker-Tippett (Devonian) field · Vertical
Halff Estate 20 #4 (API 42-461-30707) is a plugged well in Upton County, plugged October 31, 2003, last operated by Eog Resources Inc..
The RRC has issued one drilling permit, issued October 26, 1988, permitted to 11,790 ft.
It was permitted by Terra Resources, Inc. and has since transferred to Eog Resources Inc. on the wellbore schedule.
Its lease has reported 2.52K barrels of oil and 53.9K mcf of gas since January 1993, last reporting in January 2004. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Terra Resources, Inc.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 2, 2025
- Permits on file
- 16,354
- Phone
- (713) 651-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | EOG Resources Inc. |
| Production reports | EOG Resources, Inc.through Aug 2001 |
| Latest permit | Terra Resources, Inc.Oct 26, 1988 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,790
- total depth, ft
- 1
- permits on file
- Oct 26, 1988
- last permit issued
- Sep 2, 1977
- completed
- 2.52K
- cumulative oil, bbl
- 53.9K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jan 2004
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 2, 1977
- Shut in
- —
- Plugged
- Oct 31, 2003
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 |
|---|---|---|---|---|---|---|
| Halff Estate "20" O-9-7082 | Amacker-Tippett (Devonian) | EOG Resources, Inc. | 2 | 2.52K | 53.9K | Jan 1993 – Jan 2004 |
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.
- 1American Exploration CompanyJan 1993 → Jun 1995
- 2Prospctv Invstmnt & Trdg Co, LtdMay 1997 → Sep 2000
- 3EOG Resources, Inc.May 2001 → Aug 2001
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 352713-99 | Recompletion | Terra Resources, Inc. | Oct 26, 1988 | Oct 26, 1988 | — | 11,790 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 2, 1977 | Halff Estate 20 O-9-7082 | Amacker-Tippett (Devonian) | EOG Resources Inc. | Plugged | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,070 | 11,446 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 400 | 17.5 | 500 S |
| 9.625 | 4,768 | 12.25 | 1,150 S |
| 4.5 | 11,790 | 8.75 | 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 | Jan 12, 1984 | Sep 9, 1977 | Yes |
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 42-461-30707 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-30707 → 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/46130707, documented in the API reference.