WELL · 42-451-31818 · DISTRICT 7
Tweedy #21
Tom Green County · Atkinson W. (San Angelo) field · Vertical
Tweedy #21 (API 42-451-31818) is a plugged well in Tom Green County, plugged July 13, 2016, last operated by Lainco Inc..
The RRC has issued one drilling permit, issued August 31, 1987, permitted to 1,200 ft.
It was permitted by Swartz, Guy A. and has since transferred to Lainco Inc. on the wellbore schedule.
Completion filings report 6 formation tops, including Base Cretaceous (marker), B. Cretaceous, Queen, T. Whitehorse.
Its lease has reported 449K barrels of oil and 625 mcf of gas since January 1993, last reporting in July 2026. The lease carries 42 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.
Hamlin, TX · P-5 Y, filed May 4, 2026 · 8 permits on file · (325) 721-5502
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Lainco Inc. |
| Production reports | Lainco, Inc.through Mar 2026 |
| Latest permit | Swartz, Guy A.Aug 31, 1987 |
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
- Aug 31, 1987
- last permit issued
- Jan 26, 1988
- completed
- 449K
- cumulative oil, bbl
- 625
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 26, 1988
- Shut in
- —
- Plugged
- Jul 13, 2016
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 42 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 |
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 |
|---|---|---|---|---|---|---|
| 335052-99 | Drill | Swartz, Guy A. | Aug 25, 1987 | Aug 31, 1987 | — | 1,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-9252 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,160 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE OF CRETACEOUS | 240 | 1,920 |
| B. Cretaceous | 240 | 1,920 |
| Queen | 240 | 1,920 |
| T. Whitehorse | 240 | 1,920 |
| Grayburg | 486 | 1,674 |
| San Andres | 560 | 1,600 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 828 | 830 | Perforated |
| 833 | 836 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7 | 865 | 8 | 400 S |
| 7 | 865 | 11 | 400 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 | Aug 9, 1994 | Jun 27, 1994 | — |
| 00 | Mar 15, 1988 | Mar 3, 1988 | Yes |
| 00 | Mar 10, 1988 | — | — |
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 42-451-31818 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-451-31818 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 0
- bbl, all reported
- May 1995
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000069852 | H-1 Injection | Plugged Aug 15, 2016 | 100 | 1,000 | 827–836 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 0 · prior 12 0
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/45131818, documented in the API reference.