TEXAS · WELLS · BURLESON COUNTY · API 42-051-33558 · DISTRICT 03
Winchester Unit #1
Burleson County · Giddings (Buda) field · Producing · Horizontal
Winchester Unit #1 (API 42-051-33558) is a horizontal well in Burleson County operated by Magnolia Oil & Gas Operating LLC, completed October 23, 1997 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued May 7, 1997, permitted to 11,222 ft.
It was permitted by Union Pacific Resources Company and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Austin Chalk, Buda.
Its 2 leases have reported 351K barrels of oil and 219K mcf of gas since June 1997, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Magnolia Oil & Gas Operating LLC
Permitted by Union Pacific Resources Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 6, 2026
- Permits on file
- 615
- Phone
- (713) 842-9050
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 | Union Pacific Resources CompanyMay 7, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,222
- total depth, ft
- 2
- permits on file
- May 7, 1997
- last permit issued
- Oct 23, 1997
- completed
- 351K
- cumulative oil, bbl
- 219K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 1997 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 23, 1997
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| Winchester Unit O-3-23331 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 1 | 20.5K | 17K | Jun 1997 – Jul 2026 |
| Winchester Unit O-3-23373 | Giddings (Buda) | Magnolia Oil & Gas Operating LLC | 1 | 331K | 202K | Oct 1997 – Jul 2026 |
Oil, barrels lease total
Last 12 months 1,253 · prior 12 1,485(-16%)
Gas, mcf lease total
Last 12 months 2,742 · prior 12 2,761(-1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Pacific Resources CompanyJul 1997 → 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 |
|---|---|---|---|---|---|---|
| 462117-98 | Drill | Union Pacific Resources Company | Oct 14, 1997 | May 7, 1997 | — | 7,500 |
| 462117-99 | Drill | Union Pacific Resources Company | May 7, 1997 | May 7, 1997 | May 11, 1997 | 7,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 23, 1997 | Winchester Unit O-3-23373 | Giddings (Buda) | Magnolia Oil & Gas Operating LLC | Producing | 11,222 |
| Jun 23, 1997 | Winchester Unit O-3-23331 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | Partial Plug · shut in Oct 1, 2000 | 11,222 |
Formation tops
As filed on W-2/G-1. Subsea from 320 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 5,965 | -5,645 |
| Buda | 6,665 | -6,345 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,951 | 9,225 | Perforated |
| 6,034 | 11,000 | Perforated |
| 6,050 | 8,881 | Perforated |
| 6,080 | 11,222 | Perforated |
| 6,253 | 8,881 | Perforated |
| 6,439 | 1,069 | Perforated |
| 6,439 | 10,691 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,400 | 14.75 | 680 S |
| 7.625 | 6,680 | 9.875 | 455 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 20, 1998 | Nov 12, 1997 | Yes |
| 00 | Jan 13, 1998 | Oct 14, 1997 | Yes |
| 00 | Nov 10, 1997 | Oct 14, 1997 | Yes |
| 00 | Nov 3, 1997 | — | — |
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 42-051-33558 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-051-33558 → 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/05133558, documented in the API reference.