WELL · 42-211-32551 · DISTRICT 10
Lockhart 57 #4
Hemphill County · Sparks (Tonkawa) field · Vertical
Lockhart 57 #4 (API 42-211-32551) is a plugged well in Hemphill County, plugged July 16, 2018, last operated by Eog Resources Inc..
The RRC has issued one drilling permit, issued October 9, 2001, permitted to 7,800 ft.
Completion filings report 2 formation tops, including Douglas, Tonkawa.
Its 2 leases have reported 143K barrels of oil and 2.09M mcf of gas since September 2001, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 2, 2025
- Permits on file
- 16,348
- Phone
- (713) 651-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | EOG Resources Inc. |
| Production reports | 4P Energy Texas, LLCthrough Dec 2016 |
| Latest permit | EOG Resources, Inc.Oct 9, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,800
- total depth, ft
- 1
- permits on file
- Oct 9, 2001
- last permit issued
- Jan 3, 2002
- completed
- 143K
- cumulative oil, bbl
- 2.09M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2001 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 3, 2002
- Shut in
- —
- Plugged
- Jul 16, 2018
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Lockhart 57 O-14-7501 | Feldman (Basal Tonkawa) | Unbridled Resources, LLC | 2 | 16.8K | 603K | Mar 2004 – Jul 2026 |
| Lockhart 57 O-14-7408 | Sparks (Tonkawa) | EOG Resources, Inc. | 2 | 126K | 1.48M | Sep 2001 – Mar 2008 |
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.
- 1EOG Resources, Inc.Sep 2001 → Apr 2014
- 2Enervest Operating, L.L.C.May 2014 → Dec 2015
- 34P Energy Texas, LLCJan 2016 → Dec 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 514327-99 | Drill | EOG Resources, Inc. | Oct 9, 2001 | Oct 9, 2001 | Oct 22, 2001 | 7,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-14-7408 | — | — | — | — |
| — | — O-14-7501 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,659 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,650 | 7,652 | Perforated |
| 7,655 | 7,662 | Perforated |
| 7,666 | 7,672 | Perforated |
| 7,715 | 7,724 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,620 | 12.25 | 825 S |
| 4.5 | 7,850 | 7.875 | 275 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 | Aug 10, 2004 | Jan 28, 2002 | Yes |
| 00 | May 23, 2002 | Jan 28, 2002 | Yes |
| 00 | Apr 10, 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 42-211-32551 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-32551 → 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/21132551, documented in the API reference.