TEXAS · WELLS · PECOS COUNTY · WEST RANCH LEASE · API 42-371-37122 · DISTRICT 7B
West Ranch #509
Pecos County · Pinon (Overthrust) field · Producing · Vertical
- Fields on the latest permit · any of 3
- Algerita (Ouachita Caballos) · Bitterweed, S. (Caballos) · Pinon (Overthrust)
- Not one formation; the well must be completed in one of them, and no target formation is stated. The district's wildcat field is also on the permit.
West Ranch #509 (API 42-371-37122) is a well in Pecos County operated by Longfellow Energy LP, completed April 29, 2002 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended twice), issued October 23, 2001, permitted to 8,497 ft.
It was permitted by Riata Energy, Inc. and has since transferred to Longfellow Energy LP on the wellbore schedule.
Completion filings report 6 formation tops, including Base Cretaceous (marker), Dimple, Tesnus, Caballos (1st).
Its lease has reported 9 barrels of oil and 2.73M mcf of gas since April 2002, last reporting volume in September 2025.
Operator of record
Permitted by Riata Energy, Inc.; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 26, 2026
- Permits on file
- 41
- Phone
- (972) 590-9900
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Longfellow Energy LP |
| Production reports | Longfellow Energy, LPthrough Sep 2025 |
| Latest permit | Riata Energy, Inc.Oct 23, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,497
- total depth, ft
- 3
- permits on file
- Oct 23, 2001
- last permit issued
- Apr 29, 2002
- completed
- 9
- cumulative oil, bbl
- 2.73M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2002 THROUGH Sep 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 29, 2002
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| West Ranch G-10-189601 | Pinon (Overthrust) | Longfellow Energy, LP | 1 | 9 | 2.73M | Apr 2002 – Sep 2025 |
Gas, mcf lease total
Last 12 months 22 · prior 12 206(-89%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Riata Energy, Inc.May 2002 → Nov 2006
- 2Sandridge Energy, Inc.Dec 2006 → May 2009
- 3Sandridge Expl. and Prod., LLCJun 2009 → Feb 2016
- 4Occidental W TX Overthrust, Inc.Mar 2016 → Dec 2021
- 5Longfellow Energy, LPJan 2022 → Sep 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 514471-97 | Drill | Riata Energy, Inc. | May 23, 2002 | Oct 23, 2001 | — | 9,000 |
| 514471-98 | Drill | Riata Energy, Inc. | Nov 20, 2001 | Oct 23, 2001 | Feb 18, 2002 | 9,000 |
| 514471-99 | Drill | Riata Energy, Inc. | Oct 15, 2001 | Oct 23, 2001 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 29, 2002 | West Ranch G-10-189601 | Pinon (Overthrust) | Longfellow Energy LP | Producing | 8,497 |
Formation tops
As filed on W-2/G-1. Subsea from 4,065 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 1,910 | 2,155 |
| Dimple | 2,740 | 1,325 |
| Tesnus | 4,100 | -35 |
| Caballos (1ST) | 5,200 | -1,135 |
| Caballos (2ND) | 6,470 | -2,405 |
| Caballos (3RD) | 7,738 | -3,673 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,603 | 7,006 | Perforated |
| 7,738 | 8,176 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,285 | 12.25 | 550 S |
| 7 | 5,264 | 8.75 | 600 S |
| 4.5 | 8,494 | 6.125 | 225 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Sep 3, 2002 | May 28, 2002 | Yes |
| 00 | Jul 31, 2002 | — | — |
Well logs
The RRC's map lists this well among those with logs online. Its monthly inventories loaded here, which start in July 2006, list none for it, so none are itemized.
Open the RRC's log search for this well ↗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 42-371-37122 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-37122 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/37137122, documented in the API reference.