WELL · 42-427-04966 · DISTRICT 4
Montalvo N.R. #37
Starr County · Sun (F-1-M 4950) field · Producing · Vertical
Montalvo N.R. #37 (API 42-427-04966) is a well in Starr County operated by Triad O&G LLC, completed February 5, 1979 and listed as producing on the RRC schedule, shut in December 1, 2025.
The RRC has issued one drilling permit, issued December 15, 1978, permitted to 8,507 ft.
It was permitted by Exxon Corp. and has since transferred to Triad O&G LLC on the wellbore schedule.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Exxon Corp.; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 11, 2026
- Permits on file
- 5
- Phone
- (469) 471-1367
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Exxon Corp. |
| Production reports | Triad O&G, LLCthrough Nov 2025 |
| Latest permit | Exxon Corp.Dec 15, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,507
- total depth, ft
- 1
- permits on file
- Dec 15, 1978
- last permit issued
- Feb 5, 1979
- completed
- 0
- cumulative oil, bbl
- 837K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 5, 1979
- Shut in
- Dec 1, 2025
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Montalvo, N.R. G-4-81671 | Sun (F-1-M 4950) | Triad O&G, LLC | 1 | 0 | 837K | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 13,373 · prior 12 9,760(+37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Exxon Corp.Jan 1993 → Jul 1994
- 2Reh Energy, Inc.Jun 1995 → Nov 2011
- 3Kovar Operating, LLCDec 2011 → Oct 2016
- 4Valor Energy, LLCNov 2016 → May 2023
- 5Triad O&G, LLCJun 2023 → Nov 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 38994-99 | Other | Exxon Corp. | Dec 15, 1978 | Dec 15, 1978 | — | 8,507 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 5, 1979 | Montalvo N.R. G-4-81671 | Sun (F-1-M 4950) | Triad O&G LLC | Producing · shut in Dec 1, 2025 | 8,507 |
| Aug 1, 1971 | Montalvo N. R. G-4-51085 | Sun (L Vicksburg) | Exxon Corp. | Not on Schedule | — |
| Nov 1, 1967 | — G-4-43195 | Sun (I-15) | Humble Oil & Refining Co. | Not on Schedule | — |
| — | Montalvo N. R. G-4-51086 | Sun (F-4-U) | Exxon Corp. | Not on Schedule | — |
| — | Montalvo N. R. G-4-67662 | Sun (F-4-L M) | Exxon Corp. | Not on Schedule | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,778 | 4,795 | Perforated |
| 6,726 | 7,972 | Perforated |
| 8,154 | 8,160 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,569 | 12.25 | 600 S |
| 2.875 | 4,613 | — | — |
| 7 | 8,340 | 8.75 | 450 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 12, 1984 | Apr 11, 1979 | — |
| 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 42-427-04966 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-04966 → 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/42704966, documented in the API reference.