WELL · 42-409-30176 · DISTRICT 4
Welder R. H. -a- a/C 1 #35
San Patricio County · Sinton North (5600) field · Vertical
Welder R. H. -A- A/C 1 #35 (API 42-409-30176) is a plugged well in San Patricio County, plugged December 13, 2017, last operated by Marathon Oil Company.
The RRC has issued 3 drilling permits between 1978 and 1994, permitted to 8,200 ft.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Its 3 leases have reported 130K barrels of oil and 188K mcf of gas since January 1993, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Aug 14, 2025
- Permits on file
- 3,707
- Phone
- (281) 293-1000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil Company |
| Production reports | Hazelett Oil, Inc.through Jul 2006 |
| Latest permit | Marathon Oil CompanyMay 13, 1994 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,200
- total depth, ft
- 3
- permits on file
- May 13, 1994
- last permit issued
- —
- completed
- 130K
- cumulative oil, bbl
- 188K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- Dec 13, 2017
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Welder, R. H. -a- a/C 1 O-4-7311 | Sinton, North (4600) | Dallas Petroleum Group, LLC | 2 | 130K | 131K | Jan 1993 – Jul 2026 |
| Welder, R.H. "A" G-4-146105 | Sinton, North (5150) | Marathon Oil Company | 1 | 0 | 57.6K | Jun 1993 – Apr 1994 |
| Welder,rh "A" G-4-82225 | Sinton, North | Marathon Oil Company | 1 | 0 | 0 | Jan 1993 – Jun 1993 |
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.
- 1Marathon Oil CompanyJul 1993 → Dec 1999
- 2Consolidated Petro Ptnrs I, LLCJan 2000 → Nov 2001
- 3Kebo Oil & Gas, Inc.Dec 2001 → Jun 2002
- 4Hazelett Oil Company, Inc.Jul 2002 → Sep 2005
- 5Hazelett Oil, Inc.Oct 2005 → Jul 2006
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 423914-99 | Recompletion | Marathon Oil Company | May 13, 1994 | May 13, 1994 | Apr 25, 1994 | 8,200 |
| 413451-99 | Recompletion | Marathon Oil Company | Jul 2, 1993 | Jul 2, 1993 | Jun 28, 1993 | 8,200 |
| 40773-99 | Recompletion | Marathon Oil Company | Dec 8, 1978 | Dec 8, 1978 | — | 8,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-82225 | — | — | — | — |
| — | — G-4-146105 | — | — | — | — |
| — | — O-4-7311 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 58 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 1 | 57 |
| Anahuac | 4,450 | -4,392 |
| Frio | 5,150 | -5,092 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,666 | 4,671 | Perforated |
| 5,146 | 5,150 | Perforated |
| 5,386 | 5,394 | Perforated |
| 5,400 | 5,402 | Perforated |
| 5,408 | 5,410 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,129 | 15 | 735 S |
| 2.375 | 5,335 | — | — |
| 7.625 | 7,515 | 9.875 | 760 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 4, 1994 | May 9, 1994 | Yes |
| 00 | Jun 13, 1994 | — | — |
| 00 | Sep 17, 1993 | Jul 16, 1993 | Yes |
| 00 | Aug 16, 1993 | — | — |
| 00 | Dec 5, 1988 | Oct 20, 1988 | — |
| 00 | Jun 24, 1987 | May 20, 1987 | — |
| 00 | Jan 12, 1984 | May 16, 1979 | — |
| 00 | Jan 12, 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 42-409-30176 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-30176 → 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/40930176, documented in the API reference.