WELL · 42-427-34762 · DISTRICT 4
I.V. Montalvo A #20
Starr County · Sun North (6340) field · Vertical
I.V. Montalvo A #20 (API 42-427-34762) is a well in Starr County operated by Killam Oil CO. Ltd., completed January 10, 2018.
The RRC has issued 4 drilling permits between 2017 and 2026, permitted to 8,000 ft.
Completion filings report 8 formation tops, including Catahoula, Vicksburg, Cook Mountain, Jackson.
Its 5 leases have reported 8.88K barrels of oil and 195K mcf of gas since January 2018, last reporting in July 2026. The leases carry 5 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 Apr 2026 |
| Latest permit | Killam Oil Co., Ltd.Feb 20, 2026 |
- 8,000
- total depth, ft
- 4
- permits on file
- Feb 20, 2026
- last permit issued
- Jan 10, 2018
- completed
- 8.88K
- cumulative oil, bbl
- 195K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 10, 2018
- Shut in
- —
- Plugged
- —
Surface location
26.681035, -98.492583
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 5 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| I.V. Montalvo 'A' G-4-298005 | Sun,north (5470) | Killam Oil Co., Ltd. | 1 | 0 | 105K | Jun 2024 – Jul 2026 |
| I.V. Montalvo 'A' O-4-14274 | Sun, North (F-3-G) | Killam Oil Co., Ltd. | 1 | 2.05K | 15.8K | Feb 2026 – Jul 2026 |
| I.V. Montalvo 'A' O-4-14129 | Sun, North (5810) | Killam Oil Co., Ltd. | 1 | 6.83K | 32.1K | May 2019 – Nov 2024 |
| I.V. Montalvo 'A' G-4-283381 | Sun, North (6340) | Killam Oil Co., Ltd. | 1 | 0 | 11.9K | Jan 2018 – Jul 2019 |
| I.V. Montalvo 'A' G-4-284072 | Sun, North (5810) | Killam Oil Co., Ltd. | 1 | 0 | 31.1K | Apr 2018 – May 2019 |
Gas, mcf lease total
Last 12 months 40,407 · prior 12 79,883(-49%)
Oil, barrels lease total
Last 12 months 2,045 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Killam Oil Co., Ltd.Feb 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 913510-99 | Recompletion | Killam Oil Co., Ltd. | Feb 13, 2026 | Feb 20, 2026 | — | 4,990 |
| 901123-99 | Recompletion | Killam Oil Co., Ltd. | Jul 8, 2024 | Jul 11, 2024 | Nov 26, 2017 | 5,526 |
| 839693-99 | Recompletion | Killam Oil Co., Ltd. | May 7, 2018 | May 10, 2018 | Apr 24, 2018 | 6,200 |
| 832882-99 | Drill | Killam Oil Co., Ltd. | Nov 7, 2017 | Nov 13, 2017 | Nov 26, 2017 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-283381 | — | — | — | — |
| — | — G-4-284072 | — | — | — | — |
| — | — G-4-298005 | — | — | — | — |
| — | — O-4-14129 | — | — | — | — |
| — | — O-4-14274 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 354 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 1,220 | -866 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 3,399 | -3,045 |
| VicksburgVICKSBURG - INJECTION/DISPOSAL; | 5,753 | -5,399 |
| 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 |
|---|---|---|
| 4,928 | 4,933 | Perforated |
| 5,024 | 5,027 | Perforated |
| 5,296 | 5,301 | Perforated |
| 5,337 | 5,340 | Perforated |
| 5,616 | 5,618 | Perforated |
| 5,620 | 5,623 | Perforated |
| 5,627 | 5,630 | Perforated |
| 5,864 | 5,867 | Perforated |
| 5,888 | 5,891 | Perforated |
| 6,264 | 6,268 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,152 | 12.25 | 415 S |
| 4.5 | 6,484 | 7.875 | 685 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 | May 5, 2026 | Mar 4, 2026 | — |
| 00 | Apr 9, 2026 | Feb 23, 2026 | — |
| 00 | Oct 11, 2024 | Apr 29, 2025 | — |
| 00 | Mar 17, 2020 | Oct 18, 2019 | Yes |
| 00 | Aug 10, 2018 | Jul 27, 2018 | — |
| 00 | Jun 8, 2018 | May 17, 2018 | — |
| 00 | May 9, 2018 | Apr 19, 2018 | — |
| 00 | Mar 1, 2018 | Feb 10, 2018 | 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 42-427-34762 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-34762 → 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.
Montalvo, N. R.42-427-34817
0.5 KM · Triad O&G, LLC · Section with this well →
| Miocene (undifferentiated) | 8 | 353 |
| Catahoula | 1,212 | -851 |
| Catahoula | 3,220 | -2,859 |
| Vicksburg | 5,480 | -5,119 |
| Queen City | — | |
| Wilcox | — | |
| Jackson | — | |
| Cook Mountain | — |
9 TOPS · FIRST 8
N.R. Montalvo42-427-34779
1.4 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,260 | -915 |
| Catahoula | 3,418 | -3,073 |
| Vicksburg | 5,820 | -5,475 |
| Queen City | — | |
| Yegua | — | |
| Jackson | — | |
| Cook Mountain | — | |
| Miocene (undifferentiated) | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34767
1.7 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 | — | |
| Yegua | — | |
| Jackson | — | |
| Cook Mountain | — | |
| Miocene (undifferentiated) | — |
9 TOPS · FIRST 8
Montalvo 'B' Unit42-427-34751
2.0 KM · Killam Oil Co., Ltd. · Section with this well →
| Miocene (undifferentiated) | 1,400 | -1,074 |
| Catahoula | 3,660 | -3,334 |
| Catahoula | 5,600 | -5,274 |
| Vicksburg | 8,229 | -7,903 |
| Yegua | — | |
| Queen City | — | |
| Wilcox | — | |
| Jackson | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34737
2.0 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,380 | -1,050 |
| Catahoula | 3,540 | -3,210 |
| Vicksburg | 5,679 | -5,349 |
| Yegua | — | |
| Wilcox | — | |
| Queen City | — | |
| Miocene (undifferentiated) | — | |
| Jackson | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34747
2.0 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 |
| Wilcox | — | |
| Miocene (undifferentiated) | — |
13 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34739
2.4 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 |
| Yegua | — |
14 TOPS · FIRST 8
Geo. H. Speer42-427-34773
2.5 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,190 | -825 |
| Catahoula | 3,250 | -2,885 |
| Vicksburg | 5,602 | -5,237 |
| Queen City | — | |
| Miocene (undifferentiated) | — | |
| Wilcox | — | |
| Yegua | — | |
| Jackson | — |
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/42734762, documented in the API reference.