WELL · 42-507-30954 · DISTRICT 1
Thompson #421
Zavala County · Pearsall (Austin Chalk) field · Vertical
Thompson #421 (API 42-507-30954) is a plugged well in Zavala County, plugged April 2, 2014, last operated by Ineos USA Oil & Gas LLC.
The RRC has issued one drilling permit, issued January 30, 1978, permitted to 7,250 ft.
It was permitted by Champlin Petroleum CO. and has since transferred to Ineos USA Oil & Gas LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Olmos, Austin Chalk.
Its lease has reported 294K barrels of oil and 718K mcf of gas since January 1993, last reporting in July 2026. The lease carries 28 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Champlin Petroleum Co.; the EWA schedule now lists a different operator.
Denver, CO · P-5 Y, filed Apr 4, 2026 · 98 permits on file · (833) 402-7779
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ineos USA Oil & Gas LLC |
| Production reports | LMP Petroleum, Inc.through Nov 2009 |
| Latest permit | Champlin Petroleum Co.Jan 30, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,250
- total depth, ft
- 1
- permits on file
- Jan 30, 1978
- last permit issued
- Feb 14, 1991
- completed
- 294K
- cumulative oil, bbl
- 718K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 14, 1991
- Shut in
- —
- Plugged
- Apr 2, 2014
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 28 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Thompson O-1-5037 | Pearsall (Austin Chalk) | Ineos USA Oil & Gas LLC | 28 | 294K | 718K | Jan 1993 – Jul 2026 |
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.
- 1Berenergy CorporationJan 1993 → May 2004
- 2McDaniel Company, Inc., TheJun 2004 → Mar 2005
- 3Crimson Energy Partners, L.P.Apr 2005 → Aug 2007
- 4LMP Petroleum, Inc.Oct 2009 → Nov 2009
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 17357-99 | Drill | Champlin Petroleum Co. | Jan 30, 1978 | Jan 30, 1978 | Jan 31, 1978 | 7,250 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-5037 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 601 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Olmos | 4,794 | -4,193 |
| Austin Chalk | 6,700 | -6,099 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,760 | 4,950 | Perforated |
| 6,724 | 6,955 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 3,134 | 12.25 | 305 S |
| 4.5 | 7,119 | 7.875 | 750 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 | Mar 6, 1991 | Feb 19, 1991 | — |
| 00 | Jan 12, 1984 | Apr 10, 1978 | — |
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 42-507-30954 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-507-30954 → 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
- 3.7M
- bbl, all reported
- Feb 2014
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000073417 | W-14 Disposal | Plugged May 2, 2014 | 3,000 | 2,380 | 4,760–4,950 |
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/50730954, documented in the API reference.