TEXAS · WELLS · MCMULLEN COUNTY · WALKER LEASE · API 42-311-35229 · DISTRICT 01
Walker #4H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Walker #4H (API 42-311-35229) is a horizontal well in Mcmullen County operated by Verdun Oil & Gas LLC, completed June 11, 2018 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued December 20, 2012, permitted to 11,160 ft.
It was permitted by Marathon Oil EF LLC and has since transferred to Verdun Oil & Gas LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 726K barrels of oil and 1.59M mcf of gas since May 2013, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Marathon Oil EF LLC; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 22, 2025
- Permits on file
- 396
- Phone
- (713) 337-9300
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Verdun Oil & Gas LLC |
| Production reports | Verdun Oil & Gas LLCthrough Apr 2026 |
| Latest permit | Marathon Oil EF LLCDec 20, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,160
- total depth, ft
- 1
- permits on file
- Dec 20, 2012
- last permit issued
- Jun 11, 2018
- completed
- 726K
- cumulative oil, bbl
- 1.59M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2013 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 11, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Walker O-1-16857 | Eagleville (Eagle Ford-1) | Verdun Oil & Gas LLC | 4 | 726K | 1.59M | May 2013 – Jul 2026 |
Oil, barrels lease total
Last 12 months 34,659 · prior 12 47,284(-27%)
Gas, mcf lease total
Last 12 months 72,743 · prior 12 115,493(-37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCMay 2013 → Jul 2015
- 2Llewellin Operating Company, LLCAug 2015 → May 2017
- 3Valence Operating CompanyJun 2017 → Sep 2021
- 4Verdun Oil & Gas LLCNov 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 752626-99 | Drill | Marathon Oil EF LLC | Dec 4, 2012 | Dec 20, 2012 | Apr 20, 2013 | 15,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 11, 2018 | Walker O-1-16857 | Eagleville (Eagle Ford-1) | Verdun Oil & Gas LLC | Producing | 11,160 |
Formation tops
As filed on W-2/G-1. Subsea from 269 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 10,547 | -10,278 |
| Austin Chalk | 10,976 | -10,707 |
| Eagle Ford | 11,033 | -10,764 |
| Eagle FordEAGLEFORD | 11,033 | -10,764 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,272 | 15,706 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,975 | 12.25 | 1,955 S |
| 5.5 | 15,876 | 8.5 | 1,890 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 | Sep 14, 2018 | Jun 11, 2018 | — |
| 00 | Jul 29, 2013 | Jun 3, 2013 | Yes |
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 42-311-35229 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-35229 → 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/31135229, documented in the API reference.