WELL · 42-451-31382 · DISTRICT 7
Tweedy AF #4
Tom Green County · Atkinson W. (San Angelo) field · Vertical
Tweedy AF #4 (API 42-451-31382) is a well in Tom Green County operated by Swartz Oil Company, completed May 11, 1984.
The RRC has issued one drilling permit, issued February 14, 1984, permitted to 1,200 ft.
It was permitted by Swartz, Guy A. and has since transferred to Swartz Oil Company on the wellbore schedule.
Completion filings report 4 formation tops, including Base Cretaceous (marker), Queen, Grayburg, San Andres.
Its 2 leases have reported 462K barrels of oil and 841 mcf of gas since January 1993, last reporting in July 2026. The leases carry 55 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Swartz, Guy A.; the EWA schedule now lists a different operator.
- Based in
- San Angelo, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Mar 24, 2022
- Permits on file
- 52
- Phone
- (325) 650-4468
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Swartz Oil Company |
| Production reports | Lainco, Inc.through Mar 2026 |
| Latest permit | Swartz, Guy A.Feb 14, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,200
- total depth, ft
- 1
- permits on file
- Feb 14, 1984
- last permit issued
- May 11, 1984
- completed
- 462K
- cumulative oil, bbl
- 841
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 11, 1984
- 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 2 leases this well is completed on; they carry 55 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tweedy O-9-9252 | Atkinson, W. (San Angelo) | Lainco, Inc. | 42 | 449K | 625 | Jan 1993 – Jul 2026 |
| Tweedy "AF" O-9-10109 | Atkinson, W. (San Angelo) | Swartz Oil Company | 13 | 12.8K | 216 | Jan 1993 – Jun 1996 |
Oil, barrels lease total
Last 12 months 3,604 · prior 12 4,235(-15%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Swartz, Guy A.Jan 1993 → Aug 1993
- 2Swartz Oil CompanySep 1993 → Jul 2016
- 3Caminar Oil & Gas, LLCAug 2016 → Aug 2024
- 4Lainco, Inc.Sep 2024 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 229436-99 | Drill | Swartz, Guy A. | Feb 13, 1984 | Feb 14, 1984 | — | 1,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-9252 | — | — | — | — |
| — | — O-9-10109 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,120 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 220 | 1,900 |
| Queen | 220 | 1,900 |
| Grayburg | 454 | 1,666 |
| San Andres | 497 | 1,623 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 771 | 776 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7 | 793 | 11 | 380 sx |
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 | Mar 5, 1996 | May 31, 1984 | — |
| 00 | Jun 19, 1984 | May 31, 1984 | — |
| 00 | Jun 8, 1984 | May 31, 1984 | — |
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 42-451-31382 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-451-31382 → 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/45131382, documented in the API reference.