WELL · 42-149-32900 · DISTRICT 3
Sampson-Mueller Unit #1
Fayette County · Giddings (Austin Chalk-3) field · Producing · Horizontal
Sampson-Mueller Unit #1 (API 42-149-32900) is a horizontal well in Fayette County operated by Magnolia Oil & Gas Operating LLC, completed August 19, 1994 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 21, 1994, permitted to 11,400 ft.
It was permitted by Marathon Oil Company and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report one formation top, including Austin Chalk.
Its lease has reported 369K barrels of oil and 1.79M mcf of gas since August 1994, 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 Marathon Oil 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 | Marathon Oil CompanyJun 21, 1994 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,400
- total depth, ft
- 1
- permits on file
- Jun 21, 1994
- last permit issued
- Aug 19, 1994
- completed
- 369K
- cumulative oil, bbl
- 1.79M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 1994 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 19, 1994
- 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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Sampson-Mueller Unit O-3-22537 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 3 | 369K | 1.79M | Aug 1994 – Jul 2026 |
Gas, mcf lease total
Last 12 months 28,528 · prior 12 64,272(-56%)
Oil, barrels lease total
Last 12 months 4,741 · prior 12 5,646(-16%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Browning Oil Company, Inc.Aug 1994 → Mar 2019
- 2Dallas Petroleum Group, LLCApr 2019 → Jul 2025
- 3Magnolia Oil & Gas Operating LLCAug 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 425109-99 | Drill | Marathon Oil Company | Jun 21, 1994 | Jun 21, 1994 | Jun 25, 1994 | 11,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-22537 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 430 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 9,585 | -9,155 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,635 | 13,410 | Perforated |
| 10,425 | 13,192 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,025 | 12.25 | 400 S |
| 5.5 | 9,635 | 8.75 | 210 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 | Nov 16, 1994 | Sep 29, 1994 | — |
| 00 | Oct 28, 1994 | — | — |
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 42-149-32900 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-149-32900 → 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/14932900, documented in the API reference.