WELL · 42-409-33051 · DISTRICT 4
Welder-Gulley #1
San Patricio County · Oneil (6800) field · Vertical
Welder-Gulley #1 (API 42-409-33051) is a well in San Patricio County operated by Mertz Energy LLC, completed September 28, 2015.
The RRC has issued 2 drilling permits between 2015 and 2017, permitted to 7,500 ft.
Completion filings report 3 formation tops, including Catahoula, Miocene (undifferentiated), Vicksburg.
Its 3 leases have reported 17.9K barrels of oil and 82.1K mcf of gas since September 2015, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Y, filed Apr 8, 2022 · 6 permits on file · (281) 205-8140
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Mertz Energy LLC |
| Production reports | Poco LLCthrough Apr 2026 |
| Latest permit | Mertz Energy LLCMay 26, 2017 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,500
- total depth, ft
- 2
- permits on file
- May 26, 2017
- last permit issued
- Sep 28, 2015
- completed
- 17.9K
- cumulative oil, bbl
- 82.1K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2015 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 28, 2015
- 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 3 leases this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Welder Gulley O-4-14048 | Oneil (5500) | Poco LLC | 1 | 17.8K | 7.12K | May 2017 – Jul 2026 |
| Welder-Gulley G-4-280007 | Oneil (6800) | Mertz Energy LLC | 1 | 0 | 75K | May 2016 – May 2017 |
| Welder-Gulley O-4-13991 | Oneil (6800) | Mertz Energy LLC | 1 | 102 | 0 | Sep 2015 – Aug 2016 |
Oil, barrels lease total
Last 12 months 912 · prior 12 847(+8%)
Gas, mcf lease total
Last 12 months 365 · prior 12 336(+9%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mertz Energy LLCDec 2015 → Apr 2020
- 2Poco LLCMay 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 826596-99 | Recompletion | Mertz Energy LLC | May 11, 2017 | May 26, 2017 | — | 6,030 |
| 809560-99 | Drill | Mertz Energy LLC | Aug 17, 2015 | Aug 21, 2015 | Sep 2, 2015 | 7,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-280007 | — | — | — | — |
| — | — O-4-13991 | — | — | — | — |
| — | — O-4-14048 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 8 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 3,700 | -3,692 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 5,000 | -4,992 |
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC | — | — |
| Vicksburg | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,470 | 5,478 | Perforated |
| 6,472 | 6,482 | Perforated |
| 6,556 | 6,565 | Perforated |
| 6,602 | 6,614 | Perforated |
| 6,740 | 6,749 | Perforated |
| 7,060 | 7,066 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,246 | 12.25 | 510 S |
| 5.5 | 7,478 | 7.875 | 720 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 | Jul 21, 2017 | Jun 24, 2017 | — |
| 00 | Nov 4, 2016 | Oct 22, 2016 | — |
| 00 | May 31, 2016 | May 12, 2016 | Yes |
| 00 | Mar 9, 2016 | Dec 15, 2015 | Yes |
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 42-409-33051 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-33051 → 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/40933051, documented in the API reference.