TEXAS · WELLS · DENTON COUNTY · FEN-FEN UNIT LEASE · API 42-121-31216 · DISTRICT 7C
Fen-Fen Unit #1
Denton County · Newark East (Barnett Shale) field · Vertical
Fen-Fen Unit #1 (API 42-121-31216) is a plugged well in Denton County, plugged June 7, 2017, last operated by Sage Natural Resources LLC.
The RRC has issued one drilling permit, issued October 15, 2001, permitted to 9,000 ft.
It was permitted by Western Chief Oil & Gas Company and has since transferred to Sage Natural Resources LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Marble Falls, Barnett, Viola.
Operator of record
Permitted by Western Chief Oil & Gas Company; the EWA schedule now lists a different operator.
- Based in
- Tulsa, OK
- P-5 status
- Active (A)
- P-5 last filed
- Sep 17, 2025
- Permits on file
- 208
- Phone
- (918) 900-6445
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sage Natural Resources LLC |
| Production reports | Vantage Fort Worth Energy LLCthrough Mar 2016 |
| Latest permit | Western Chief Oil & Gas CompanyOct 15, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 1
- permits on file
- Oct 15, 2001
- last permit issued
- Jan 6, 2002
- completed
- 0
- cumulative oil, bbl
- 224K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2002 THROUGH May 2018
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 6, 2002
- Shut in
- —
- Plugged
- Jun 7, 2017
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 |
|---|---|---|---|---|---|---|
| Fen-Fen Unit G-13-188451 | Newark, East (Barnett Shale) | Sage Natural Resources LLC | 1 | 0 | 224K | Jan 2002 – May 2018 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hep Oil Company, Ltd.Mar 2002 → Dec 2007
- 2Hep Oil GP, LLCJan 2008 → Jan 2012
- 3Silver Creek Resources, LLCFeb 2012 → Aug 2012
- 4Silver Creek Oil & Gas, LLCSep 2012 → Sep 2012
- 5Vantage Fort Worth Energy LLCNov 2012 → Mar 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 514434-99 | Drill | Western Chief Oil & Gas Company | Oct 15, 2001 | Oct 15, 2001 | Oct 20, 2001 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 6, 2002 | Fen-Fen Unit G-13-188451 | Newark East (Barnett Shale) | Sage Natural Resources LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 702 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Marble Falls | 7,582 | -6,880 |
| BarnettBARNETT SHALE | 7,875 | -7,173 |
| Viola | 8,875 | -8,173 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,880 | 8,080 | Perforated |
| 8,445 | 8,870 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,152 | 11 | — |
| 5.5 | 8,905 | 7.875 | 300 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 | Jun 26, 2002 | Apr 24, 2002 | Yes |
| 00 | May 9, 2002 | — | — |
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 42-121-31216 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-121-31216 → 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/12131216, documented in the API reference.