WELL · 42-427-34751 · DISTRICT 4
Montalvo B Unit #1
Starr County · Sun North (Rincon 7490) field · Directional
Montalvo B Unit #1 (API 42-427-34751) is a well in Starr County operated by Killam Oil CO. Ltd., completed July 5, 2017.
The RRC has issued 2 drilling permits in 2017, permitted to 9,000 ft.
Completion filings report 8 formation tops, including Miocene (undifferentiated), Catahoula, Vicksburg, Cook Mountain.
Its 2 leases have reported 17.2K barrels of oil and 28.3K mcf of gas since July 2017, last reporting in July 2026. The leases carry 2 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.Dec 14, 2017 |
- 9,000
- total depth, ft
- 2
- permits on file
- Dec 14, 2017
- last permit issued
- Jul 5, 2017
- completed
- 17.2K
- cumulative oil, bbl
- 28.3K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2017 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 5, 2017
- Shut in
- —
- Plugged
- —
Surface location
26.690847, -98.475776
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 2 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 'B' Unit O-4-14069 | Sun, North (Vicksburg 6410) | Killam Oil Co., Ltd. | 1 | 17.2K | 27.9K | Dec 2017 – Jul 2026 |
| Montalvo 'B' Unit G-4-282718 | Sun, North (Rincon 7490) | Killam Oil Co., Ltd. | 1 | 0 | 439 | Jul 2017 – Jan 2018 |
Oil, barrels lease total
Last 12 months 1,525 · prior 12 1,482(+3%)
Gas, mcf lease total
Last 12 months 6,115 · prior 12 5,376(+14%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Killam Oil Co., Ltd.Aug 2017 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 834000-99 | Recompletion | Killam Oil Co., Ltd. | Dec 7, 2017 | Dec 14, 2017 | — | 7,830 |
| 826797-99 | Drill | Killam Oil Co., Ltd. | May 16, 2017 | May 25, 2017 | Jun 4, 2017 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-282718 | — | — | — | — |
| — | — O-4-14069 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 326 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC | 1,400 | -1,074 |
| CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI | 3,660 | -3,334 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 5,600 | -5,274 |
| VicksburgVICKSBURG - INJECTION/DISPOSAL; | 8,229 | -7,903 |
| Cook Mountain | — | — |
| JacksonJACKSON - INJECTION/DISPOSAL | — | — |
| Queen CityQUEEN CITY - INJECTION/DISPOSAL | — | — |
| Wilcox | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,402 | 6,405 | Perforated |
| 6,405 | 6,414 | Perforated |
| 6,443 | 6,445 | Perforated |
| 7,942 | 7,946 | Perforated |
| 7,952 | 7,962 | Perforated |
| 8,141 | 8,147 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,146 | 12.25 | 440 S |
| 4.5 | 8,200 | 7.875 | 910 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 | Jun 6, 2019 | May 16, 2019 | — |
| 00 | Feb 28, 2018 | Jan 22, 2018 | — |
| 00 | Nov 3, 2017 | Oct 5, 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 42-427-34751 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-34751 → 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'42-427-34737
0.6 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,380 | -1,050 |
| Catahoula | 3,540 | -3,210 |
| Vicksburg | 5,679 | -5,349 |
| Wilcox | — | |
| Queen City | — | |
| Jackson | — | |
| Miocene (undifferentiated) | — | |
| Cook Mountain | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34747
0.8 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 |
| Miocene (undifferentiated) | — | |
| Queen City | — |
13 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34739
1.0 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 |
| Miocene (undifferentiated) | — |
14 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34767
1.3 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,270 | -934 |
| Catahoula | 3,451 | -3,115 |
| Vicksburg | 5,865 | -5,529 |
| Jackson | — | |
| Wilcox | — | |
| Yegua | — | |
| Cook Mountain | — | |
| Queen City | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34742
1.4 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 |
| Queen City | — | |
| Cook Mountain | — |
12 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34766
1.5 KM · Killam Oil Co., Ltd. · Section with this well →
| Catahoula | 1,314 | -994 |
| Catahoula | 3,521 | -3,201 |
| Vicksburg | 5,780 | -5,460 |
| Cook Mountain | — | |
| Wilcox | — | |
| Queen City | — | |
| Miocene (undifferentiated) | — | |
| Jackson | — |
9 TOPS · FIRST 8
I.V. Montalvo 'C'42-427-34736
1.7 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'42-427-34743
1.8 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 |
| Yegua | — | |
| Queen City | — |
13 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/42734751, documented in the API reference.