WELL · 42-389-36666 · DISTRICT 8
Vass Unit 13-14 #1H
Reeves County · Wolfbone (Trend Area) field · Producing · Horizontal
Vass Unit 13-14 #1H (API 42-389-36666) is a horizontal well in Reeves County operated by Apache Corporation, completed August 16, 2018 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued December 22, 2017, permitted to 13,000 ft.
It was permitted by Primexx Operating Corporation and has since transferred to Apache Corporation on the wellbore schedule.
Completion filings report 10 formation tops, including Delaware, Castile, Bell Canyon, Cherry Canyon.
Its lease has reported 759K barrels of oil and 3.7M mcf of gas since February 2018, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Primexx Operating Corporation; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 9,754 permits on file · (713) 296-6400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Apache Corporationthrough Apr 2026 |
| Latest permit | Primexx Operating CorporationDec 22, 2017 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,000
- total depth, ft
- 1
- permits on file
- Dec 22, 2017
- last permit issued
- Aug 16, 2018
- completed
- 759K
- cumulative oil, bbl
- 3.7M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 16, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
31.214838, -103.640268
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Reeves 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; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Vass Unit 13-14 O-10-49652 | Wolfbone (Trend Area) | Apache Corporation | 2 | 759K | 3.7M | Feb 2018 – Jul 2026 |
Gas, mcf lease total
Last 12 months 104,030 · prior 12 231,733(-55%)
Oil, barrels lease total
Last 12 months 10,659 · prior 12 14,955(-29%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Primexx Operating CorporationMay 2018 → Sep 2021
- 2Callon Petroleum Operating CoOct 2021 → Jul 2024
- 3Apache CorporationAug 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 834497-99 | Drill | Primexx Operating Corporation | Dec 20, 2017 | Dec 22, 2017 | Jan 21, 2018 | 13,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-49652 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,768 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| DelawareFORD-DELAWARE | 2,689 | 79 |
| DelawareFORD-DELAWARE | 2,691 | 77 |
| CastileCASTILLE | 2,879 | -111 |
| Delaware | 4,110 | -1,342 |
| Bell Canyon | 4,868 | -2,100 |
| DelawareDELAWARE CONSOLIDATED GAS | 6,573 | -3,805 |
| Cherry Canyon | 7,142 | -4,374 |
| Bone SpringBONE SPRINGS | 9,740 | -6,972 |
| Permian (undifferentiated)PERMIAN | 9,915 | -7,147 |
| Wolfcamp | 9,958 | -7,190 |
| Bell Canyon | — | — |
| Bone SpringBONE SPRINGS | — | — |
| CastileCASTILLE | — | — |
| Cherry Canyon | — | — |
| Delaware | — | — |
| DelawareDELAWARE CONSOLIDATED GAS | — | — |
| Ellenburger | — | — |
| DelawareFORD-DELAWARE | — | — |
| Fusselman | — | — |
| Pennsylvanian | — | — |
| Permian (undifferentiated)PERMIAN | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,286 | 19,900 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 2,564 | 17.5 | 1,930 S |
| 9.625 | 9,742 | 17.5 | 1,130 S |
| 9.625 | 9,742 | 12.25 | 1,335 S |
| 5.5 | 20,199 | 8.5 | 2,505 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 1, 2025 | Jul 10, 2025 | — |
| 00 | Feb 13, 2019 | Nov 9, 2018 | Yes |
| 00 | Apr 10, 2018 | Feb 9, 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 42-389-36666 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-389-36666 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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.
Kesey Unit 10-742-389-36868
0.0 KM · Primexx Operating Corporation · Section with this well →
| Delaware | 2,500 | 268 |
| Castile | 2,800 | -32 |
| Delaware | 3,500 | -732 |
| Bell Canyon | 4,642 | -1,874 |
| Cherry Canyon | 5,474 | -2,706 |
| Delaware | 6,500 | -3,732 |
| Bone Spring | 8,350 | -5,582 |
| Wolfcamp | 9,857 | -7,089 |
10 TOPS · FIRST 8
Vass Unit 13-1442-389-35902
0.2 KM · Primexx Operating Corporation · Section with this well →
| Delaware | 2,500 | 274 |
| Castile | 2,800 | -26 |
| Bell Canyon | 4,634 | -1,860 |
| Delaware | 5,232 | -2,458 |
| Cherry Canyon | 5,462 | -2,688 |
| Delaware | 6,121 | -3,347 |
| Bone Spring | 7,501 | -4,727 |
| Wolfcamp | 9,751 | -6,977 |
10 TOPS · FIRST 8
Kesey Unit 10-742-389-39419
0.3 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,593 | |
| Delaware | 4,568 | |
| Bell Canyon | 4,625 | |
| Cherry Canyon | 5,462 | |
| Bone Spring | 7,783 | |
| Wolfcamp | 9,844 | |
| Delaware | — | |
| Permian (undifferentiated) | — |
10 TOPS · FIRST 8
Kesey Unit 10-742-389-39420
0.3 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,593 | |
| Delaware | 4,568 | |
| Bell Canyon | 4,625 | |
| Cherry Canyon | 5,462 | |
| Bone Spring | 7,783 | |
| Wolfcamp | 9,844 | |
| Delaware | — | |
| Permian (undifferentiated) | — |
10 TOPS · FIRST 8
Kesey Unit 10-742-389-39421
0.3 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,592 | |
| Delaware | 4,567 | |
| Bell Canyon | 4,624 | |
| Cherry Canyon | 5,461 | |
| Bone Spring | 7,782 | |
| Wolfcamp | 9,843 | |
| Delaware | — | |
| Pennsylvanian | — |
10 TOPS · FIRST 8
Kesey Unit 10-7E42-389-39417
1.0 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,564 | |
| Delaware | 4,642 | |
| Bell Canyon | 4,688 | |
| Cherry Canyon | 5,535 | |
| Bone Spring | 7,845 | |
| Wolfcamp | 9,916 | |
| Delaware | — | |
| Delaware | — |
10 TOPS · FIRST 8
Kesey Unit 10-7E42-389-39418
1.0 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,557 | |
| Delaware | 4,640 | |
| Bell Canyon | 4,686 | |
| Cherry Canyon | 5,533 | |
| Bone Spring | 7,843 | |
| Wolfcamp | 9,914 | |
| Permian (undifferentiated) | — | |
| Delaware | — |
10 TOPS · FIRST 8
Kesey Unit 10-7E42-389-39416
1.0 KM · Primexx Operating Corporation · Section with this well →
| Castile | 2,563 | |
| Delaware | 4,659 | |
| Bell Canyon | 4,713 | |
| Cherry Canyon | 5,547 | |
| Bone Spring | 7,870 | |
| Wolfcamp | 9,912 | |
| Permian (undifferentiated) | — | |
| Pennsylvanian | — |
10 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/38936666, documented in the API reference.