WELL · 42-135-04475 · DISTRICT 8
Slator -B- #4
Ector County · TXL (Ellenburger) field · Vertical
Slator -B- #4 (API 42-135-04475) is a plugged well in Ector County, plugged August 21, 2001, last operated by Formentera Operations LLC.
The RRC has issued 2 drilling permits between 1978 and 1998, permitted to 9,742 ft.
It was permitted by Anadarko Petroleum Corp. and has since transferred to Formentera Operations LLC on the wellbore schedule.
Its 2 leases have reported 227K barrels of oil and 951K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Anadarko Petroleum Corp.; the EWA schedule now lists a different operator.
- Based in
- Austin, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 11, 2026
- Permits on file
- 90
- Phone
- (512) 514-5779
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Formentera Operations LLC |
| Production reports | Formentera Operations LLCthrough Apr 2026 |
| Latest permit | Anadarko Petroleum Corp.Jun 16, 1998 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,742
- total depth, ft
- 2
- permits on file
- Jun 16, 1998
- last permit issued
- —
- completed
- 227K
- cumulative oil, bbl
- 951K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- Aug 21, 2001
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 2 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Slator -B- O-10-6972 | TXL (Ellenburger) | Formentera Operations LLC | 2 | 130K | 430K | Jan 1993 – Jul 2026 |
| Slator -B- O-10-15546 | TXL (Devonian) | Formentera Operations LLC | 3 | 96.9K | 521K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 2,126 · prior 12 1,890(+12%)
Gas, mcf lease total
Last 12 months 6,466 · prior 12 7,159(-10%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Shell Western E&P Inc.Jan 1993 → Nov 1995
- 2Anadarko Petroleum CorporationDec 1995 → Mar 2007
- 3Apache CorporationApr 2007 → Jun 2021
- 4Slant Operating, LLCJul 2021 → Oct 2023
- 5Formentera Operations LLCNov 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 477024-99 | Recompletion | Anadarko Petroleum Corp. | Jun 10, 1998 | Jun 16, 1998 | Jul 17, 1998 | 9,742 |
| 19954-99 | Other | Shell Oil Company | Mar 13, 1978 | Mar 13, 1978 | Mar 21, 1978 | 9,742 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-6972 | — | — | — | — |
| — | — O-10-15546 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,484 | 7,656 | Perforated |
| 7,834 | 7,953 | Perforated |
| 9,078 | 9,170 | Perforated |
| 9,345 | 9,416 | Perforated |
| — | 9,416 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 221 | 17.5 | 300 S |
| 13.375 | 221 | — | 300 S |
| 8.625 | 3,611 | 11 | 2,500 S |
| 8.625 | 3,611 | — | 2,500 S |
| 5.5 | 9,610 | 7.875 | 1,000 S |
| 5.5 | 9,612 | — | 1,000 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 | Mar 10, 1999 | Jul 31, 1998 | — |
| 00 | Jan 12, 1984 | Sep 18, 1972 | — |
| 00 | Jan 12, 1984 | — | — |
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 42-135-04475 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-04475 → 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/13504475, documented in the API reference.