WELL · 42-427-34790 · DISTRICT 4
Montalvo B (North) Unit #1
Starr County · Sun North (5470) field · Producing · Vertical
Montalvo B (North) Unit #1 (API 42-427-34790) is a well in Starr County operated by Killam Oil CO. Ltd., completed October 18, 2021 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 8, 2021, permitted to 8,000 ft.
Completion filings report 8 formation tops, including Catahoula, Vicksburg, Cook Mountain, Jackson.
No lease production has been reported under this well’s leases.
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.Jun 8, 2021 |
- 8,000
- total depth, ft
- 1
- permits on file
- Jun 8, 2021
- last permit issued
- Oct 18, 2021
- completed
- 0
- cumulative oil, bbl
- 465K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2021 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 18, 2021
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
26.708854, -98.472798
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 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 'B' (North) Unit G-4-291593 | Sun,north (5470) | Killam Oil Co., Ltd. | 1 | 0 | 465K | Oct 2021 – Jul 2026 |
Gas, mcf lease total
Last 12 months 46,637 · prior 12 59,700(-22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Killam Oil Co., Ltd.Oct 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 870208-99 | Drill | Killam Oil Co., Ltd. | Jun 2, 2021 | Jun 8, 2021 | Aug 18, 2021 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-291593 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 313 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 1,358 | -1,045 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 3,535 | -3,222 |
| VicksburgVICKSBURG - INJECTION/DISPOSAL; | 5,780 | -5,467 |
| 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 |
|---|---|---|
| 5,412 | 5,416 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,048 | 12.25 | 440 S |
| 4.5 | 7,284 | 7.875 | 665 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 25, 2022 | Jan 6, 2022 | — |
| 00 | Dec 1, 2021 | Nov 20, 2021 | 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 42-427-34790 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-34790 → 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'42-427-34743
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'42-427-34766
0.8 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,314 | -994 |
| Catahoula | 3,521 | -3,201 |
| Vicksburg | 5,780 | -5,460 |
| Jackson | — | |
| Yegua | — | |
| Wilcox | — | |
| Queen City | — | |
| Miocene (undifferentiated) | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34736
1.0 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,310 | -989 |
| Catahoula | 1,310 | -989 |
| Catahoula | 1,310 | -989 |
| Frio | 3,670 | -3,349 |
| Catahoula | 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'42-427-34742
1.1 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,300 | -976 |
| Catahoula | 1,300 | -976 |
| Catahoula | 3,662 | -3,338 |
| Catahoula | 3,662 | -3,338 |
| Vicksburg | 5,820 | -5,496 |
| Vicksburg | 5,820 | -5,496 |
| Jackson | — | |
| Yegua | — |
12 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34739
1.3 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'42-427-34747
1.6 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 | — | |
| Cook Mountain | — |
13 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34737
1.7 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
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 |
| Jackson | — | |
| Wilcox | — | |
| Yegua | — | |
| Queen City | — |
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/42734790, documented in the API reference.