WELL · 42-289-31670 · DISTRICT 5
Fossil Lone Oak Ranch #4H
Leon County · Hilltop Resort (Glen Rose 8498) field · NO Production · Horizontal · Directional
Fossil Lone Oak Ranch #4H (API 42-289-31670) is a horizontal well in Leon County operated by Contrast Energy LLC, completed February 13, 2013 and listed as no production on the RRC schedule.
The RRC has issued 2 drilling permits between 2007 and 2012, permitted to 13,750 ft.
It was permitted by Gastar Exploration Texas, LP and has since transferred to Contrast Energy LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Austin Chalk, Buda, Glen Rose, Pettit.
Its 2 leases have reported 5.87K barrels of oil and 1.02M mcf of gas since September 2007, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Gastar Exploration Texas, LP; the EWA schedule now lists a different operator.
Tulsa, OK · P-5 Y, filed Nov 4, 2025 · (800) 251-3098
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Contrast Energy LLC |
| Production reports | Contrast Energy, LLCthrough Jan 2024 |
| Latest permit | Gastar Exploration Texas, LPJun 16, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,750
- total depth, ft
- 2
- permits on file
- Jun 16, 2012
- last permit issued
- Feb 13, 2013
- completed
- 5.87K
- cumulative oil, bbl
- 1.02M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2007 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 13, 2013
- 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 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 |
|---|---|---|---|---|---|---|
| Fossil Lone Oak Ranch G-5-232272 | Hilltop Resort (Knowles) | Contrast Energy, LLC | 1 | 0 | 1.02M | Sep 2007 – Jul 2026 |
| Fossil Lone Oak Ranch O-5-3979 | Hilltop Resort (Glen Rose 8498) | Contrast Energy, LLC | 1 | 5.87K | 0 | Aug 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Gastar Exploration Texas, LPSep 2007 → Sep 2013
- 2Fossil Operating, Inc.Oct 2013 → Sep 2016
- 3Rivershore Operating LLCOct 2016 → Oct 2016
- 4Contrast Energy, LLCJan 2021 → Jan 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 742428-99 | Recompletion | Gastar Exploration Texas, LP | Jun 7, 2012 | Jun 16, 2012 | Jun 26, 2012 | 11,500 |
| 639768-99 | Drill | Gastar Exploration Texas, LP | May 29, 2007 | Jun 4, 2007 | Jun 17, 2007 | 13,750 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-5-232272 | — | — | — | — |
| — | — O-5-3979 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 297 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin ChalkBASE AUSTIN CHALK | 5,625 | -5,328 |
| Austin ChalkBASE AUSTIN CHALK | 5,629 | -5,332 |
| Buda | 6,313 | -6,016 |
| Buda | 6,320 | -6,023 |
| Glen Rose | 7,521 | -7,224 |
| PettitPETTET | 9,469 | -9,172 |
| PettitPETTET | 9,504 | -9,207 |
| Pettit | 9,504 | -9,207 |
| Travis Peak | 10,044 | -9,747 |
| Knowles | 13,178 | -12,881 |
| Austin ChalkBASE AUSTIN CHALK | — | — |
| Buda | — | — |
| PettitPETTET | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,856 | 7,921 | Perforated |
| 7,968 | 7,974 | Perforated |
| 13,363 | 15,126 | Open hole |
| 13,452 | 15,388 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,389 | 12.25 | 1,020 S |
| 9.625 | 2,689 | 12.25 | 920 S |
| 7 | 13,363 | 8.75 | 670 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 7, 2013 | Feb 20, 2013 | — |
| 00 | Dec 4, 2012 | Aug 23, 2012 | — |
| 00 | Aug 4, 2009 | Jun 27, 2008 | — |
| 00 | Jan 24, 2008 | Nov 16, 2007 | Yes |
| 00 | Jan 15, 2008 | — | — |
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 42-289-31670 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-289-31670 → 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.
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/28931670, documented in the API reference.