WELL · 42-427-33908 · DISTRICT 4
Montalvo #1
Starr County · Sun (L Vicksburg) field · Vertical
Montalvo #1 (API 42-427-33908) is a plugged well in Starr County, plugged September 13, 2016, last operated by Oxy USA Inc..
The RRC has issued one drilling permit, issued November 18, 2005, permitted to 10,000 ft.
It was permitted by Samson Lone Star LP and has since transferred to Oxy USA Inc. on the wellbore schedule.
Completion filings report 5 formation tops, including Frio, Vkbg S, Vkbg 5, Vkbg V.
Operator of record
Permitted by Samson Lone Star LP; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 26, 2026
- Permits on file
- 3,316
- Phone
- (713) 215-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | OXY USA Inc. |
| Production reports | OXY USA Inc.through Jan 2015 |
| Latest permit | Samson Lone Star LPNov 18, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,000
- total depth, ft
- 1
- permits on file
- Nov 18, 2005
- last permit issued
- Feb 23, 2006
- completed
- 0
- cumulative oil, bbl
- 47.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2006 THROUGH May 2017
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 23, 2006
- Shut in
- —
- Plugged
- Sep 13, 2016
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 G-4-217424 | Sun (L Vicksburg) | OXY USA Inc. | 1 | 0 | 47.4K | Feb 2006 – May 2017 |
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.
- 1Samson Lone Star LPFeb 2006 → Jun 2007
- 2Samson Lone Star, LLCJul 2007 → Apr 2008
- 3Pogo Producing Company LLCMay 2008 → Aug 2011
- 4Plains Exploration & Prod. Co.Sep 2011 → Feb 2012
- 5OXY USA Inc.Mar 2012 → Jan 2015
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 609749-99 | Drill | Samson Lone Star LP | Nov 18, 2005 | Nov 18, 2005 | Dec 9, 2005 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-217424 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 358 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,490 | 7,700 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,025 | 12.25 | 660 S |
| 7 | 6,950 | 8.5 | 400 S |
| 4.5 | 8,492 | 6.125 | 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Nov 13, 2006 | Mar 23, 2006 | Yes |
| 00 | Jul 27, 2006 | — | — |
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 42-427-33908 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-33908 → 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/42733908, documented in the API reference.