WELL · 42-409-00385 · DISTRICT 4
Welder R. H. -B- #12
San Patricio County · North Pasture (7600) field · Vertical
Welder R. H. -B- #12 (API 42-409-00385) is a permitted well in San Patricio County filed by Dallas Petroleum Group, LLC; no completion report is on file yet.
The RRC has issued 2 drilling permits between 1989 and 2021, permitted to 8,004 ft.
It was permitted by Dallas Petroleum Group, LLC and has since transferred to Marathon Oil Company on the wellbore schedule.
Completion filings report 5 formation tops, including Miocene (undifferentiated), Catahoula, Vicksburg, Anahuac.
Its 2 leases have reported 123K barrels of oil and 293K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Dallas Petroleum Group, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Apr 4, 2026 · 3,707 permits on file · (800) 332-9449
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil Company |
| Production reports | Dallas Petroleum Group, LLCthrough Jul 2022 |
| Latest permit | Dallas Petroleum Group, LLCJul 20, 2021 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,004
- total depth, ft
- 2
- permits on file
- Jul 20, 2021
- last permit issued
- —
- completed
- 123K
- cumulative oil, bbl
- 293K
- 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
- —
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| R.H. Welder -B- G-4-291666 | North Pasture (7250) | Dallas Petroleum Group, LLC | 1 | 0 | 19.2K | Jun 2021 – Jul 2026 |
| Welder, R.H. -B- O-4-11591 | North Pasture (7300 Sand) | Dallas Petroleum Group, LLC | 1 | 123K | 273K | 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.
- 1Marathon Oil CompanyJan 1993 → Dec 1999
- 2Consolidated Petro Ptnrs I, LLCJan 2000 → Mar 2001
- 3Hazelett Oil Company, Inc.May 2003 → Sep 2005
- 4Hazelett Oil, Inc.Oct 2005 → Feb 2008
- 5Sydri Operating, LLCMar 2008 → Apr 2015
- 6Dallas Petroleum Group, LLCMay 2015 → Jul 2022
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 870967-99 | Recompletion | Dallas Petroleum Group, LLC | Jul 2, 2021 | Jul 20, 2021 | Jun 24, 2021 | 8,004 |
| 356870-99 | Recompletion | Marathon Oil Company | Mar 10, 1989 | Mar 21, 1989 | — | 8,004 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-291666 | — | — | — | — |
| — | — O-4-11591 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 77 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 1 | 76 |
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC | 1,000 | -923 |
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 1,500 | -1,423 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 2,000 | -1,923 |
| Vicksburg | 2,500 | -2,423 |
| Anahuac | 4,450 | -4,373 |
| Miocene (undifferentiated)MIOCENE & YOUNGER | 4,450 | -4,373 |
| Anahuac | 5,150 | -5,073 |
| Frio | 5,150 | -5,073 |
| Frio | 7,212 | -7,135 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,270 | 7,272 | Perforated |
| 7,305 | 7,310 | Perforated |
| 7,373 | 7,377 | Perforated |
| 7,395 | 7,400 | Perforated |
| 7,399 | 7,403 | Perforated |
| — | 7,372 | Perforated |
| — | 7,610 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,119 | — | 900 S |
| 10.75 | 1,151 | 12.25 | 900 S |
| 10.75 | 1,151 | — | 900 S |
| 10.75 | 1,154 | 15 | 750 S |
| 2 | 7,643 | — | — |
| 5.5 | 7,789 | 9.875 | 700 S |
| 5.5 | 7,824 | 8.625 | 750 S |
| 5.5 | 7,824 | — | 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 | Dec 28, 2021 | Aug 23, 2022 | — |
| 00 | Apr 26, 1989 | Mar 22, 1989 | Yes |
| 00 | Mar 30, 1989 | — | — |
| 00 | Aug 14, 1987 | Jul 29, 1987 | — |
| 00 | Jul 6, 1987 | Jun 15, 1987 | Yes |
| 00 | Jun 29, 1987 | — | — |
| 00 | Jan 12, 1984 | Mar 2, 1973 | — |
| 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 42-409-00385 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-00385 → 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/40900385, documented in the API reference.