WELL · 42-495-32340 · DISTRICT 8
Keystone Cattle Co. #378H
Winkler County · Flying -W- (Wolfcamp) field · Producing · Horizontal
Keystone Cattle CO. #378H (API 42-495-32340) is a horizontal well in Winkler County operated by Highmark Energy Operating LLC, completed February 6, 1991 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued August 22, 1990, permitted to 10,000 ft.
It was permitted by Chevron U. S. A. Inc. and has since transferred to Highmark Energy Operating LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Queen, San Andres, Glorieta, Tubb.
Its lease has reported 360K barrels of oil and 1.34M mcf of gas since January 1993, last reporting in July 2026. The lease carries 10 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chevron U. S. A. Inc.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Dec 4, 2025 · 23 permits on file · (903) 876-2591
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Highmark Energy Operating LLC |
| Production reports | Highmark Energy Operating, LLCthrough Apr 2026 |
| Latest permit | Chevron U. S. A. Inc.Aug 22, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,000
- total depth, ft
- 2
- permits on file
- Aug 22, 1990
- last permit issued
- Feb 6, 1991
- completed
- 360K
- cumulative oil, bbl
- 1.34M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 6, 1991
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
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 10 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Keystone Cattle Co. O-10-8745 | Flying -W- (Wolfcamp) | Highmark Energy Operating, LLC | 10 | 360K | 1.34M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 6,776 · prior 12 7,788(-13%)
Gas, mcf lease total
Last 12 months 165 · prior 12 2,042(-92%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pennzoil Petroleum CompanyJan 1993 → Jan 1995
- 2Pennzoil Exploration & Prod. Co.Feb 1995 → Feb 1999
- 3Pennzenergy Exp. & Prod., L.L.C.Mar 1999 → Mar 2000
- 4Devon Energy Production Co, L.P.Apr 2000 → Apr 2008
- 5Legacy Reserves Operating LPMay 2008 → Feb 2023
- 6Highmark Energy Operating, LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 376839-98 | Drill | Chevron U. S. A. Inc. | Nov 19, 1990 | Aug 22, 1990 | Nov 28, 1990 | 10,000 |
| 376839-99 | Drill | Chevron U. S. A. Inc. | Aug 20, 1990 | Aug 22, 1990 | — | 9,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-8745 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,124 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen | 3,824 | -700 |
| San Andres | 4,446 | -1,322 |
| GlorietaGLORIETTA | 5,680 | -2,556 |
| Tubb | 6,660 | -3,536 |
| Wichita-AlbanyWICHITA/ALBANY | 7,272 | -4,148 |
| Wolfcamp | 8,188 | -5,064 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,652 | 10,040 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,360 | 17.5 | 1,425 S |
| 9.625 | 3,304 | 12.25 | 600 S |
| 7 | 8,652 | 8.75 | 890 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 | Oct 1, 1991 | Mar 5, 1991 | Yes |
| 00 | Sep 20, 1991 | — | — |
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 42-495-32340 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-495-32340 → 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.
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/49532340, documented in the API reference.