WELL · 42-427-34742 · DISTRICT 4
I.V. Montalvo C #59
Starr County · Sun North (6070) field · Vertical
I.V. Montalvo C #59 (API 42-427-34742) is a well in Starr County operated by Killam Oil CO. Ltd., completed August 10, 2017.
The RRC has issued 3 drilling permits (amended once) in 2017, permitted to 7,000 ft.
Completion filings report 8 formation tops, including Catahoula, Vicksburg, Cook Mountain, Jackson.
Its 3 leases have reported 378K barrels of oil and 721K mcf of gas since June 2017, last reporting in July 2026. The leases carry 9 wells, so these are lease totals, not this well alone.
Operator of record
Laredo, TX · P-5 Y, filed Feb 4, 2026 · 837 permits on file · (956) 724-7141
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Killam Oil Co. Ltd. |
| Production reports | Killam Oil Co., Ltd.through Mar 2025 |
| Latest permit | Killam Oil Co., Ltd.Sep 29, 2017 |
- 7,000
- total depth, ft
- 4
- permits on file
- Sep 29, 2017
- last permit issued
- Aug 10, 2017
- completed
- 378K
- cumulative oil, bbl
- 721K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2017 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 10, 2017
- Shut in
- —
- Plugged
- —
Surface location
26.702442, -98.481493
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Starr County.
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 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| I.V. Montalvo 'C' O-4-14050 | Sun, North (Vicksburg 5980) | Killam Oil Co., Ltd. | 7 | 378K | 692K | Jun 2017 – Jul 2026 |
| I.V. Montalvo 'C' G-4-282653 | Sun, North (6070) | Killam Oil Co., Ltd. | 1 | 0 | 5.8K | Aug 2017 – Sep 2017 |
| I.V. Montalvo 'C' G-4-282427 | Sun, North (Vicksburg 6410) | Killam Oil Co., Ltd. | 1 | 0 | 22.8K | Jun 2017 – Aug 2017 |
Gas, mcf lease total
Last 12 months 0 · prior 12 19,393(-100%)
Oil, barrels lease total
Last 12 months 0 · prior 12 965(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Killam Oil Co., Ltd.Jun 2017 → Mar 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 831290-99 | Recompletion | Killam Oil Co., Ltd. | Sep 25, 2017 | Sep 29, 2017 | — | 6,155 |
| 830832-99 | Recompletion | Killam Oil Co., Ltd. | Sep 11, 2017 | Sep 15, 2017 | Aug 8, 2017 | 6,250 |
| 825014-98 | Drill | Killam Oil Co., Ltd. | Jun 15, 2017 | Apr 6, 2017 | Apr 24, 2017 | 7,000 |
| 825014-99 | Drill | Killam Oil Co., Ltd. | Mar 31, 2017 | Apr 6, 2017 | — | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-282427 | — | — | — | — |
| — | — G-4-282653 | — | — | — | — |
| — | — O-4-14050 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 324 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CatahoulaCATAHOULA-ANAHUAC | 1,300 | -976 |
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 1,300 | -976 |
| CatahoulaCATAHOULA-FRIO | 3,662 | -3,338 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 3,662 | -3,338 |
| Vicksburg | 5,820 | -5,496 |
| VicksburgVICKSBURG - INJECTION/DISPOSAL; | 5,820 | -5,496 |
| Cook Mountain | — | — |
| JacksonJACKSON - INJECTION/DISPOSAL | — | — |
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC | — | — |
| Queen CityQUEEN CITY - INJECTION/DISPOSAL | — | — |
| Wilcox | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,691 | 5,694 | Perforated |
| 5,937 | 5,941 | Perforated |
| 5,940 | 5,946 | Perforated |
| 6,161 | 6,165 | Perforated |
| 6,222 | 6,227 | Perforated |
| 6,365 | 6,369 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,195 | 12.25 | 415 S |
| 4.5 | 6,699 | 7.875 | 935 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 | Aug 23, 2019 | Jul 29, 2019 | — |
| 00 | Sep 20, 2018 | Sep 17, 2018 | — |
| 00 | Oct 20, 2017 | Sep 19, 2017 | — |
| 00 | Oct 17, 2017 | Oct 3, 2017 | — |
| 00 | Sep 1, 2017 | Jul 17, 2017 | Yes |
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 42-427-34742 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-34742 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
I.V. Montalvo 'C'42-427-34766
0.3 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,314 | -994 |
| Catahoula | 3,521 | -3,201 |
| Vicksburg | 5,780 | -5,460 |
| Jackson | — | |
| Cook Mountain | — | |
| Wilcox | — | |
| Queen City | — | |
| Miocene (undifferentiated) | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34736
0.3 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,310 | -989 |
| Catahoula | 1,310 | -989 |
| Catahoula | 1,310 | -989 |
| Catahoula | 3,670 | -3,349 |
| Frio | 3,670 | -3,349 |
| Catahoula | 3,670 | -3,349 |
| Vicksburg | 5,680 | -5,359 |
| Vicksburg | 5,680 | -5,359 |
16 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34739
0.4 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,395 | -1,065 |
| Catahoula | 1,395 | -1,065 |
| Catahoula | 3,560 | -3,230 |
| Catahoula | 3,560 | -3,230 |
| Catahoula | 3,560 | -3,230 |
| Vicksburg | 5,760 | -5,430 |
| Vicksburg | 5,760 | -5,430 |
| Jackson | — |
14 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34743
0.6 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,328 | -1,010 |
| Catahoula | 1,328 | -1,010 |
| Catahoula | 3,496 | -3,178 |
| Catahoula | 3,496 | -3,178 |
| Vicksburg | 5,762 | -5,444 |
| Vicksburg | 5,762 | -5,444 |
| Miocene (undifferentiated) | — | |
| Cook Mountain | — |
13 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34747
0.7 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,275 | -943 |
| Catahoula | 1,275 | -943 |
| Catahoula | 3,492 | -3,160 |
| Catahoula | 3,492 | -3,160 |
| Vicksburg | 5,750 | -5,418 |
| Vicksburg | 5,750 | -5,418 |
| Yegua | — | |
| Miocene (undifferentiated) | — |
13 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34737
0.8 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,380 | -1,050 |
| Catahoula | 3,540 | -3,210 |
| Vicksburg | 5,679 | -5,349 |
| Jackson | — | |
| Queen City | — | |
| Wilcox | — | |
| Yegua | — | |
| Miocene (undifferentiated) | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34767
1.0 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,270 | -934 |
| Catahoula | 3,451 | -3,115 |
| Vicksburg | 5,865 | -5,529 |
| Queen City | — | |
| Cook Mountain | — | |
| Jackson | — | |
| Miocene (undifferentiated) | — | |
| Wilcox | — |
9 TOPS · FIRST 8
Montalvo 'B' (North) Unit42-427-34790
1.1 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,358 | -1,045 |
| Catahoula | 3,535 | -3,222 |
| Vicksburg | 5,780 | -5,467 |
| Miocene (undifferentiated) | — | |
| Queen City | — | |
| Wilcox | — | |
| Yegua | — | |
| Cook Mountain | — |
9 TOPS · FIRST 8
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/42734742, documented in the API reference.