WELL · 42-211-31395 · DISTRICT 10
Humphreys #4
Hemphill County · Mathers Ranch (Tonkawa) field · Vertical
Humphreys #4 (API 42-211-31395) is a well in Hemphill County operated by Unbridled Resources LLC, completed October 27, 1981.
The RRC has issued one drilling permit, issued October 9, 1981, permitted to 8,100 ft.
It was permitted by Philcon Development CO. and has since transferred to Unbridled Resources LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Tonkawa, Douglas.
Its 2 leases have reported 15.5K barrels of oil and 950K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Philcon Development Co.; the EWA schedule now lists a different operator.
Oklahoma City, OK · P-5 Y, filed Sep 4, 2025 · 6 permits on file · (844) 507-5540
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Unbridled Resources LLC |
| Production reports | Unbridled Resources, LLCthrough Dec 2024 |
| Latest permit | Philcon Development Co.Oct 9, 1981 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,100
- total depth, ft
- 1
- permits on file
- Oct 9, 1981
- last permit issued
- Oct 27, 1981
- completed
- 15.5K
- cumulative oil, bbl
- 950K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 27, 1981
- Shut in
- —
- Plugged
- —
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 |
|---|---|---|---|---|---|---|
| Humphreys G-14-283568 | Mathers Ranch (Tonkawa) | Unbridled Resources, LLC | 1 | 0 | 176K | Mar 2016 – Jul 2026 |
| Humphreys O-14-5106 | Mathers Ranch (Tonkawa) | Unbridled Resources, LLC | 1 | 15.5K | 774K | Jan 1993 – May 2021 |
Gas, mcf lease total
Last 12 months 0 · prior 12 10,091(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Philcon Development Co.Jan 1993 → Apr 2008
- 2Credo Petroleum CorporationMay 2008 → Dec 2012
- 3Forestar Petroleum CorporationJan 2013 → Sep 2015
- 44P Energy Texas, LLCOct 2015 → Oct 2020
- 5Unbridled Resources, LLCNov 2020 → Dec 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 136499-99 | Drill | Philcon Development Co. | Oct 9, 1981 | Oct 9, 1981 | — | 8,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-14-283568 | — | — | — | — |
| — | — O-14-5106 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,409 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,200 | 7,925 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 100 | 17.5 | 100 S |
| 8.625 | 2,803 | 12.25 | 850 S |
| 2.375 | 7,941 | — | — |
| 4.5 | 8,047 | 7.875 | 825 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 | May 8, 2018 | Jul 10, 2017 | Yes |
| 00 | Jan 12, 1984 | May 4, 1982 | — |
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 42-211-31395 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-31395 → 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/21131395, documented in the API reference.