WELL · 42-409-00477 · DISTRICT 4
Welder R.H. -B- #5
San Patricio County · Sinton West (4400 Sand) field · Vertical
Welder R.H. -B- #5 (API 42-409-00477) is a plugged well in San Patricio County, plugged May 8, 2013, last operated by Marathon Oil Company.
The RRC has issued 4 drilling permits (amended twice) between 1990 and 1993, permitted to 5,826 ft.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Its 5 leases have reported 3.63K barrels of oil and 110K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 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 | Dallas Petroleum Group, LLCthrough Apr 2026 |
| Latest permit | Marathon Oil CompanyOct 12, 1993 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,826
- total depth, ft
- 6
- permits on file
- Oct 12, 1993
- last permit issued
- Jul 18, 1991
- completed
- 3.63K
- cumulative oil, bbl
- 110K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 18, 1991
- Shut in
- —
- Plugged
- May 8, 2013
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 5 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Welder, R. H. -B- O-4-5956 | Sinton, North (4600) | Dallas Petroleum Group, LLC | 3 | 3.63K | 1.24K | Jan 1993 – Jul 2026 |
| Welder, R.H. "B" G-4-146843 | Sinton, North (1950) | Sydri Operating, LLC | 1 | 0 | 109K | Oct 1993 – May 2013 |
| Welder, R.H. -B- O-4-11973 | Sinton, West (4400 Sand) | Marathon Oil Company | 1 | 0 | 0 | Jan 1993 – Mar 1997 |
| — G-4-72232 | — | — | 0 | 0 | 0 | — |
| — G-4-136262 | — | — | 0 | 0 | 0 | — |
Oil, barrels lease total
Last 12 months 25 · prior 12 26(-4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanyOct 1993 → Nov 1997
- 2Sydri Operating, LLCJun 2013 → Feb 2015
- 3Dallas Petroleum Group, LLCJul 2015 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 417027-99 | Recompletion | Marathon Oil Company | Oct 12, 1993 | Oct 12, 1993 | Sep 30, 1993 | 5,826 |
| 389793-98 | Recompletion | Marathon Oil Company | Aug 19, 1991 | Jul 11, 1991 | Jul 16, 1991 | 5,826 |
| 389793-99 | Recompletion | Marathon Oil Company | Jul 11, 1991 | Jul 11, 1991 | — | 5,826 |
| 385427-99 | Recompletion | Marathon Oil Company | Mar 7, 1991 | Mar 7, 1991 | Mar 7, 1991 | 5,826 |
| 372981-98 | Recompletion | Marathon Oil Company | Aug 13, 1990 | May 9, 1990 | — | 5,826 |
| 372981-99 | Recompletion | Marathon Oil Company | May 4, 1990 | May 9, 1990 | — | 5,826 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-72232 | — | — | — | — |
| — | — G-4-136262 | — | — | — | — |
| — | — G-4-146843 | — | — | — | — |
| — | — O-4-5956 | — | — | — | — |
| — | — O-4-11973 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 60 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 1 | 59 |
| Anahuac | 4,450 | -4,390 |
| Frio | 5,150 | -5,090 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,940 | 1,948 | Perforated |
| 4,448 | 4,453 | Perforated |
| 4,668 | 4,674 | Perforated |
| 4,846 | 4,852 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,122 | — | 700 S |
| 10.75 | 1,122 | 15 | 800 S |
| 2 | 1,540 | — | — |
| 7.875 | 1,714 | — | — |
| 7.625 | 1,714 | — | — |
| 5.5 | 5,825 | 7.25 | 600 S |
| 5.5 | 5,825 | 9.875 | 600 S |
| 5.5 | 5,825 | — | 600 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 | Jan 7, 1994 | Oct 22, 1993 | — |
| 00 | Oct 26, 1993 | — | — |
| 00 | Oct 9, 1991 | Aug 2, 1991 | Yes |
| 00 | Sep 9, 1991 | Apr 11, 1991 | Yes |
| 00 | May 21, 1991 | Apr 11, 1991 | Yes |
| 00 | Apr 30, 1991 | — | — |
| 00 | Mar 6, 1991 | Sep 11, 1990 | Yes |
| 00 | Dec 21, 1990 | — | — |
| 00 | Jan 12, 1984 | Aug 4, 1977 | — |
| 00 | Jan 12, 1984 | Dec 27, 1967 | — |
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 42-409-00477 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-00477 → 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/40900477, documented in the API reference.