WELL · 42-331-35111 · DISTRICT 3
Wolf Unit #4HA
Milam County · Giddings (Austin Chalk-3) field · Producing · Horizontal
Wolf Unit #4HA (API 42-331-35111) is a horizontal well in Milam County operated by Magnolia Oil & Gas Operating LLC, completed January 7, 2022 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued October 1, 2021, permitted to 6,400 ft.
It was permitted by Treadstone Energy Prtnr OP, LLC and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Navarro, Pecan Gap, Wolf City, Austin Chalk.
Its lease has reported 1.09M barrels of oil and 1.55M mcf of gas since February 1998, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Magnolia Oil & Gas Operating LLC
Permitted by Treadstone Energy Prtnr OP, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Mar 4, 2026 · 615 permits on file · (713) 345-6206
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Magnolia Oil & Gas Operating LLC |
| Production reports | Magnolia Oil & Gas Operating LLCthrough Apr 2026 |
| Latest permit | Treadstone Energy Prtnr OP, LLCOct 1, 2021 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,400
- total depth, ft
- 1
- permits on file
- Oct 1, 2021
- last permit issued
- Jan 7, 2022
- completed
- 1.09M
- cumulative oil, bbl
- 1.55M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 1998 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 7, 2022
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
30.809576, -96.658833
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Milam County.
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Wolf Unit O-3-23462 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 3 | 1.09M | 1.55M | Feb 1998 – Jul 2026 |
Oil, barrels lease total
Last 12 months 37,407 · prior 12 54,139(-31%)
Gas, mcf lease total
Last 12 months 160,171 · prior 12 215,111(-26%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Pacific Resources CompanyFeb 1998 → Jan 2001
- 2Rme Petroleum CompanyFeb 2001 → Nov 2002
- 3Anadarko E&P Company LPDec 2002 → Dec 2012
- 4Anadarko E&P Onshore LLCJan 2013 → Aug 2016
- 5Treadstone Energy Prtnr OP, LLCSep 2016 → Nov 2021
- 6LRR Pecos Valley, LLCDec 2021 → Nov 2023
- 7Magnolia Oil & Gas Operating LLCDec 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 873118-99 | Drill | Treadstone Energy Prtnr OP, LLC | Sep 27, 2021 | Oct 1, 2021 | Oct 23, 2021 | 6,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-23462 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 294 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| NavarroNAVARRO - DISPOSAL | 2,902 | -2,608 |
| Pecan Gap | 4,188 | -3,894 |
| Wolf City | 4,347 | -4,053 |
| Austin Chalk | 5,431 | -5,137 |
| EdwardsEDWARDS - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,147 | 13,640 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 2,470 | 13.5 | 880 S |
| 4.875 | 6,145 | 9.875 | 610 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 | Jan 23, 2024 | Oct 10, 2023 | 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 42-331-35111 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-331-35111 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Tiger Unit42-331-33521
0.0 KM · Union Pacific Resources Company · Section with this well →
| Navarro | 2,900 | -2,593 |
| Pecan Gap | 4,210 | -3,903 |
| Austin Chalk | 5,454 | -5,147 |
| Austin Chalk | 5,454 | -5,147 |
| Buda | 6,018 | -5,711 |
| Georgetown | 6,124 | -5,817 |
| Edwards | 6,418 | -6,111 |
| Travis Peak | 9,130 | -8,823 |
11 TOPS · FIRST 8
AJ42-331-35055
0.7 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Midway | 2,038 | -1,743 |
| Navarro | 2,994 | -2,699 |
| Pecan Gap | 4,239 | -3,944 |
| Giddings (Austin Chalk-3) | 5,482 | -5,187 |
| Edwards | — |
Cora42-331-35056
0.7 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Midway | 2,042 | -1,746 |
| Navarro | 3,000 | -2,704 |
| Pecan Gap | 4,265 | -3,969 |
| Giddings (Austin Chalk-3) | 5,500 | -5,204 |
| Edwards | — |
Holden-Moore Unit42-331-35007
0.7 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Navarro | 3,003 | -2,706 |
| Pecan Gap | 4,244 | -3,947 |
| Austin Chalk | 5,484 | -5,187 |
| Buda | 6,066 | -5,769 |
| Edwards | — |
Holden-Moore Unit42-331-35006
0.7 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Navarro | 3,016 | -2,719 |
| Pecan Gap | 4,223 | -3,926 |
| Giddings (Austin Chalk-3) | 5,482 | -5,185 |
| Edwards | — |
Robyn42-331-35054
1.3 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Navarro | 3,000 | -2,687 |
| Pecan Gap | 4,200 | -3,887 |
| Giddings (Austin Chalk-3) | 5,553 | -5,240 |
| Edwards | — |
Graiden42-331-35053
1.3 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Navarro | 2,871 | -2,557 |
| Pecan Gap | 4,245 | -3,931 |
| Giddings (Austin Chalk-3) | 5,477 | -5,163 |
| Edwards | — |
Stewart Unit42-331-35052
1.3 KM · Treadstone Energy Prtnr OP, LLC · Section with this well →
| Navarro | 2,841 | -2,528 |
| Pecan Gap | 4,234 | -3,921 |
| Giddings (Austin Chalk-3) | 5,466 | -5,153 |
| Edwards | — |
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/33135111, documented in the API reference.