WELL · 42-451-30546 · DISTRICT 7
Duff A. H. Est. A #2
Tom Green County · Dove Creek South (Wolfcamp) field · Vertical
Duff A. H. Est. A #2 (API 42-451-30546) is a well in Tom Green County operated by Union Pacific Resources Company, completed September 28, 1989.
The RRC has issued 3 drilling permits between 1979 and 1990, permitted to 7,000 ft.
Completion filings report 5 formation tops, including Spraberry, Dean, Wolfcamp, Cisco.
Its 3 leases have reported 86.7K barrels of oil and 2.12M mcf of gas since January 1993, last reporting in July 2026. The leases carry 17 wells, so these are lease totals, not this well alone.
Operator of record
Union Pacific Resources Company
Fort Worth, TX · P-5 Y, filed Feb 9, 2001 · 5,638 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Union Pacific Resources Company |
| Production reports | Trek Resources, Inc.through Apr 2026 |
| Latest permit | Union Pacific Resources CompanyMar 29, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,000
- total depth, ft
- 3
- permits on file
- Mar 29, 1990
- last permit issued
- Sep 28, 1989
- completed
- 86.7K
- cumulative oil, bbl
- 2.12M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 28, 1989
- Shut in
- —
- Plugged
- —
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 3 leases this well is completed on; they carry 17 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Duff, A. H. Estate "A" O-9-8045 | Dove Creek (Canyon -D-) | Trek Resources, Inc. | 9 | 86.7K | 2.12M | Jan 1993 – Jul 2026 |
| Duff, A.H. Estate"a" O-9-23602 | Dove Creek (Canyon Consolidated) | Trek Resources, Inc. | 8 | 0 | 0 | Mar 2026 – Jul 2026 |
| — O-9-10869 | — | — | 0 | 0 | 0 | — |
Gas, mcf lease total
Last 12 months 15,730 · prior 12 18,310(-14%)
Oil, barrels lease total
Last 12 months 471 · prior 12 906(-48%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Pacific Resources CompanyJan 1993 → Sep 1995
- 2Montgomery Petroleum, Inc.Oct 1995 → Aug 2007
- 3MJM Oil & Gas, Inc.Jan 1996 → Nov 2001
- 4Trek Resources, Inc.Sep 2007 → Feb 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 371604-99 | Recompletion | Union Pacific Resources Company | Mar 29, 1990 | Mar 29, 1990 | — | 6,779 |
| 364158-99 | Recompletion | Union Pacific Resources Company | Sep 20, 1989 | Sep 20, 1989 | — | 6,779 |
| 63221-99 | Drill | Champlin Petroleum Co. | Nov 8, 1979 | Nov 8, 1979 | Nov 13, 1979 | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-8045 | — | — | — | — |
| — | — O-9-10869 | — | — | — | — |
| — | — O-9-23602 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,516 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,166 | 5,172 | Perforated |
| 5,180 | 5,187 | Perforated |
| 5,628 | 5,644 | Perforated |
| 5,685 | 5,696 | Perforated |
| 5,686 | 5,696 | Perforated |
| 6,360 | 6,370 | Perforated |
| 6,552 | 6,619 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 937 | 12.25 | 570 S |
| 2.375 | 6,438 | — | — |
| 4.5 | 6,775 | 7.875 | 1,305 S |
| 4.5 | 6,776 | 7.875 | 1,305 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 | May 19, 2026 | May 21, 1990 | Yes |
| 00 | Jun 12, 1990 | May 21, 1990 | Yes |
| 00 | Apr 3, 1990 | Mar 7, 1990 | Yes |
| 00 | Mar 24, 1990 | — | — |
| 00 | Jan 12, 1984 | Dec 19, 1979 | — |
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 42-451-30546 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-451-30546 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/45130546, documented in the API reference.