TEXAS · WELLS · SAN PATRICIO COUNTY · API 42-409-04002 · DISTRICT 04
Welder R.H. -B- #16
San Patricio County · Sinton North (1600 Miocene) field · Vertical
Welder R.H. -B- #16 (API 42-409-04002) is a plugged well in San Patricio County, plugged November 10, 2010, last operated by Sydri Operating LLC.
The RRC has issued one drilling permit, issued August 29, 1995, permitted to 2,450 ft.
It was permitted by Marathon Oil Company and has since transferred to Sydri Operating LLC on the wellbore schedule.
Completion filings report one formation top, including Miocene (undifferentiated).
Operator of record
Permitted by Marathon Oil Company; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 11, 2026
- Permits on file
- 46
- Phone
- (214) 373-8626
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sydri Operating LLC |
| Production reports | Sydri Operating, LLCthrough Feb 2009 |
| Latest permit | Marathon Oil CompanyAug 29, 1995 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,450
- total depth, ft
- 1
- permits on file
- Aug 29, 1995
- last permit issued
- Aug 9, 1995
- completed
- 0
- cumulative oil, bbl
- 40.6K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Nov 2010
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 9, 1995
- Shut in
- —
- Plugged
- Nov 10, 2010
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 |
|---|---|---|---|---|---|---|
| Welder, R.H. -B- G-4-155200 | Sinton, North (1600 Miocene) | Sydri Operating, LLC | 1 | 0 | 40.6K | Aug 1995 – Nov 2010 |
| Welder, R. H. -B- O-4-5849 | Sinton, North (Shallow) | Marathon Oil Company | 1 | 0 | 0 | Jan 1993 – Sep 1995 |
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 CompanyAug 1995 → Dec 1996
- 2Hazelett Oil, Inc.May 2006 → Dec 2006
- 3Sydri Operating, LLCOct 2008 → Feb 2009
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 439348-99 | Recompletion | Marathon Oil Company | Aug 28, 1995 | Aug 29, 1995 | Jul 25, 1995 | 2,450 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 9, 1995 | Welder R.H. -B- G-4-155200 | Sinton North (1600 Miocene) | Sydri Operating LLC | Plugged | — |
| Jul 19, 1964 | Welder R. H. -B- O-4-5849 | Sinton North (Shallow) | Marathon Oil Company | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 68 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 2,400 | -2,332 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,684 | 1,688 | Perforated |
| 2,335 | 2,338 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 206 | — | — |
| 10.75 | 217 | 15 | 250 S |
| 5.5 | 2,437 | — | — |
| 5.5 | 2,448 | 8.75 | 575 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 | Nov 9, 1995 | Aug 28, 1995 | Yes |
| 00 | Sep 8, 1995 | — | — |
| 00 | Jan 12, 1984 | Jul 31, 1964 | — |
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 42-409-04002 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-04002 → 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/40904002, documented in the API reference.