TEXAS · WELLS · SAN PATRICIO COUNTY · API 42-409-00764 · DISTRICT 04
Welder R. H. a A/C-1 #19
San Patricio County · Sinton North (3500) field · Vertical
Welder R. H. A A/C-1 #19 (API 42-409-00764) is a plugged well in San Patricio County, plugged May 10, 2013, last operated by Sydri Operating LLC.
The RRC has issued 2 drilling permits between 1989 and 1998, permitted to 5,885 ft.
It was permitted by Marathon Oil Company and has since transferred to Sydri Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Its 2 leases have reported 24.5K barrels of oil and 136K mcf of gas since January 1993, with no volume in the three years through April 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
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 2006 |
| Latest permit | Marathon Oil CompanyJun 15, 1998 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,885
- total depth, ft
- 2
- permits on file
- Jun 15, 1998
- last permit issued
- May 28, 1998
- completed
- 24.5K
- cumulative oil, bbl
- 136K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 2006
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 28, 1998
- Shut in
- —
- Plugged
- May 10, 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 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. "a" A/C-1 G-4-168499 | Sinton, North (3500) | Sydri Operating, LLC | 1 | 0 | 122K | May 1998 – Feb 2006 |
| Welder, R.H. "a" A/C-1 O-4-11610 | Sinton, North (5050 Stray | Marathon Oil Company | 1 | 24.5K | 13.1K | Jan 1993 – Apr 1998 |
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 → Nov 2001
- 3Kebo Oil & Gas, Inc.Dec 2001 → Jun 2002
- 4Hazelett Oil Company, Inc.Jul 2002 → Sep 2005
- 5Hazelett Oil, Inc.Oct 2005 → Feb 2006
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 476967-99 | Recompletion | Marathon Oil Company | Jun 8, 1998 | Jun 15, 1998 | May 12, 1998 | 5,885 |
| 358041-99 | Recompletion | Marathon Oil Company | Apr 12, 1989 | Apr 13, 1989 | — | 5,885 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 28, 1998 | Welder R. H. a A/C-1 G-4-168499 | Sinton North (3500) | Sydri Operating LLC | Plugged | — |
| Nov 13, 1990 | Welder R.H. a A/C-1 O-4-11610 | Sinton North (5050 Stray | Marathon Oil Company | Plugged | — |
| — | Welder R. H. -a- a/C 1 O-4-2895 | Sinton North | Marathon Oil Company | Plugged | — |
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 |
|---|---|---|
| 3,456 | 3,464 | Perforated |
| 5,056 | 5,070 | Perforated |
| 5,070 | 5,077 | Perforated |
| — | 5,398 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,085 | — | — |
| 9.625 | 1,100 | 12.25 | 450 S |
| 5.5 | 5,630 | 8.75 | 200 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 21, 1998 | Jun 5, 1998 | Yes |
| 00 | Jun 29, 1998 | — | — |
| 00 | Jan 7, 1991 | Nov 26, 1990 | — |
| 00 | May 26, 1989 | Apr 17, 1989 | Yes |
| 00 | May 6, 1989 | — | — |
| 00 | Jan 12, 1984 | Dec 11, 1958 | — |
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 42-409-00764 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-00764 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/40900764, documented in the API reference.