WELL · 42-211-33304 · DISTRICT 10
Hefley #4122P
Hemphill County · Buffalo Wallow (Granite Wash) field · Vertical
Hefley #4122P (API 42-211-33304) is a plugged well in Hemphill County, plugged March 20, 2019, last operated by Eqv Operating LLC.
The RRC has issued one drilling permit (amended once), issued May 10, 2005, permitted to 13,500 ft.
It was permitted by Noble Energy Production, Inc. and has since transferred to Eqv Operating LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Granite Wash, Oswego.
Operator of record
Permitted by Noble Energy Production, Inc.; the EWA schedule now lists a different operator.
Oklahoma City, OK · P-5 Y, filed Aug 4, 2025 · (405) 831-7443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Eqv Operating LLC |
| Production reports | Unit Petroleum Companythrough Aug 2013 |
| Latest permit | Noble Energy Production, Inc.May 10, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,500
- total depth, ft
- 2
- permits on file
- May 10, 2005
- last permit issued
- Nov 9, 2005
- completed
- 0
- cumulative oil, bbl
- 137K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2005 THROUGH Apr 2025
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 9, 2005
- Shut in
- —
- Plugged
- Mar 20, 2019
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 |
|---|---|---|---|---|---|---|
| Hefley G-14-218926 | Buffalo Wallow (Granite Wash) | Eqv Operating LLC | 1 | 0 | 137K | Nov 2005 – Apr 2025 |
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.
- 1Noble Energy Production, Inc.Dec 2005 → Aug 2007
- 2Noble Energy IncSep 2007 → Aug 2012
- 3Unit Petroleum CompanySep 2012 → Aug 2013
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 600438-98 | Drill | Noble Energy Production, Inc. | Oct 7, 2005 | May 10, 2005 | Oct 27, 2005 | 13,500 |
| 600438-99 | Drill | Patina Oil & Gas Corporation | May 9, 2005 | May 10, 2005 | Oct 27, 2005 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-14-218926 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,564 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Granite WashGRANITE WASH A-1 | 11,176 | -8,612 |
| Granite WashGRANITE WASH B | 11,309 | -8,745 |
| Granite WashGRANITE WASH C | 11,588 | -9,024 |
| OswegoOSWEGO LM | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,207 | 11,247 | Perforated |
| 11,360 | 11,536 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 3,227 | 11 | 1,575 S |
| 4.5 | 11,853 | 7.875 | 395 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 | Feb 9, 2007 | Aug 18, 2006 | Yes |
| 00 | Sep 13, 2006 | — | — |
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 42-211-33304 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-33304 → 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/21133304, documented in the API reference.