WELL · 42-427-04698 · DISTRICT 4
Montalvo N. R. #18
Starr County · Sun (5300) field · Vertical
Montalvo N. R. #18 (API 42-427-04698) is a plugged well in Starr County, plugged May 11, 2018, last operated by Humble Oil & Refining CO..
The RRC has issued one drilling permit (amended once), issued April 12, 1991, permitted to 5,365 ft.
It was permitted by Exxon Corp. and has since transferred to Humble Oil & Refining CO. on the wellbore schedule.
Operator of record
Permitted by Exxon Corp.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Humble Oil & Refining Co. |
| Production reports | Kovar Operating, LLCthrough Oct 2012 |
| Latest permit | Exxon Corp.Apr 12, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,365
- total depth, ft
- 2
- permits on file
- Apr 12, 1991
- last permit issued
- Sep 1, 1965
- completed
- 0
- cumulative oil, bbl
- 698K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH May 2018
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 1, 1965
- Shut in
- —
- Plugged
- May 11, 2018
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Montalvo, N. R. G-4-37981 | Sun (H-1) | Valor Energy, LLC | 1 | 0 | 698K | Jan 1993 – May 2018 |
| Montalvo, N.R. G-4-138685 | Sun (F-4-G) | Valor Energy, LLC | 1 | 0 | 13 | Jan 1993 – May 2018 |
| — G-4-53490 | — | — | 0 | 0 | 0 | — |
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.
- 1Exxon Corp.Jan 1993 → Jan 1993
- 2Reh Energy, Inc.Aug 1995 → Sep 2007
- 3Kovar Operating, LLCApr 2012 → Oct 2012
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 386592-98 | Recompletion | Exxon Corp. | Jul 18, 1991 | Apr 12, 1991 | — | 5,365 |
| 386592-99 | Recompletion | Exxon Corp. | Apr 9, 1991 | Apr 12, 1991 | May 21, 1991 | 5,365 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-37981 | — | — | — | — |
| — | — G-4-53490 | — | — | — | — |
| — | — G-4-138685 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,870 | 4,877 | Perforated |
| 5,271 | 5,276 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,009 | — | — |
| 8.625 | 1,019 | 12.25 | 325 S |
| 8.625 | 1,019 | — | — |
| 2.875 | 5,350 | — | — |
| 2.875 | 5,352 | — | — |
| 2.875 | 5,361 | 7.875 | 365 S |
| 2.875 | 5,361 | — | — |
| 2.875 | 5,363 | — | — |
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 | Sep 13, 1991 | Aug 14, 1991 | — |
| 00 | Aug 8, 1991 | Jun 27, 1991 | Yes |
| 00 | Jul 16, 1991 | — | — |
| 00 | Jan 12, 1984 | Oct 3, 1972 | — |
| 00 | Jan 12, 1984 | Jan 11, 1966 | — |
| 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 42-427-04698 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-04698 → 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/42704698, documented in the API reference.