WELL · 42-123-35229 · DISTRICT 2
Sager 01-Duderstadt 01 SA1 #01H
DE Witt County · DE Witt (Eagle Ford Shale) field · Producing · Horizontal
Sager 01-Duderstadt 01 Sa1 #01H (API 42-123-35229) is a horizontal well in De Witt County operated by Marathon Oil EF LLC, completed July 15, 2023 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued October 3, 2022, permitted to 25,000 ft.
Completion filings report 10 formation tops, including Queen City, Carrizo, Wilcox, Anacacho.
No lease production has been reported under this well’s leases.
Operator of record
Houston, TX · P-5 Y, filed Aug 4, 2025 · 3,191 permits on file · (800) 332-9449
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Apr 2026 |
| Latest permit | Ensign Operating LLCOct 3, 2022 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 25,000
- total depth, ft
- 2
- permits on file
- Oct 3, 2022
- last permit issued
- Jul 15, 2023
- completed
- 0
- cumulative oil, bbl
- 3.65M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2023 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 15, 2023
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
29.123172, -97.422032
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in DE Witt 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Sager 01-Duderstadt 01 SA1 G-2-295785 | DE Witt (Eagle Ford Shale) | Marathon Oil EF LLC | 1 | 0 | 3.65M | Jul 2023 – Jul 2026 |
Gas, mcf lease total
Last 12 months 453,088 · prior 12 961,169(-53%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJul 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 884384-98 | Drill | Marathon Oil EF LLC | Feb 23, 2023 | Oct 3, 2022 | Jun 6, 2023 | 25,000 |
| 884384-99 | Drill | Ensign Operating LLC | Sep 28, 2022 | Oct 3, 2022 | Mar 30, 2023 | 25,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-295785 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 334 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 5,545 | -5,211 |
| Carrizo | 6,065 | -5,731 |
| Wilcox | 6,065 | -5,731 |
| Anacacho | 13,023 | -12,689 |
| Austin Chalk | 13,224 | -12,890 |
| Eagle Ford | 13,664 | -13,330 |
| Catahoula | — | — |
| Frio | — | — |
| Vicksburg | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 15,528 | 24,022 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,533 | 12.25 | 1,112 S |
| 5.5 | 24,022 | 8.75 | 4,651 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 | Oct 24, 2023 | Sep 19, 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 42-123-35229 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-123-35229 → 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.
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.
Sager 01-Duderstadt 01 SA242-123-35230
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Reklaw | 5,780 | -5,446 |
| Carrizo | 6,065 | -5,731 |
| Wilcox | 6,065 | -5,731 |
| Anacacho | 12,989 | -12,655 |
| Austin Chalk | 13,189 | -12,855 |
| Eagle Ford | 13,612 | -13,278 |
| Frio | — | |
| Yegua | — |
10 TOPS · FIRST 8
Sager 01 - D01 D42-123-35231
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 5,545 | -5,211 |
| Reklaw | 5,780 | -5,446 |
| Wilcox | 6,065 | -5,731 |
| Carrizo | 6,065 | -5,731 |
| Anacacho | 12,963 | -12,629 |
| Austin Chalk | 13,172 | -12,838 |
| Eagle Ford | 13,593 | -13,259 |
| Vicksburg | — |
12 TOPS · FIRST 8
Natho a-Natho B SA 142-123-35381
1.1 KM · BPX Operating Company · Section with this well →
| Wilcox | 6,172 | -5,860 |
| Austin Chalk | 13,260 | -12,948 |
| Eagle Ford | 13,677 | -13,365 |
| Catahoula | — | |
| Edwards | — | |
| Frio | — | |
| Vicksburg | — | |
| Yegua | — |
Natho a-Natho B SA 242-123-35382
1.1 KM · BPX Operating Company · Section with this well →
| Wilcox | 6,202 | -5,890 |
| Austin Chalk | 13,329 | -13,017 |
| Eagle Ford | 13,758 | -13,446 |
| Frio | — | |
| Vicksburg | — | |
| Yegua | — | |
| Edwards | — | |
| Catahoula | — |
Natho a-Natho B SA 342-123-35383
1.1 KM · BPX Operating Company · Section with this well →
| Wilcox | 6,222 | -5,910 |
| Austin Chalk | 13,357 | -13,045 |
| Eagle Ford | 13,786 | -13,474 |
| Edwards | — | |
| Frio | — | |
| Vicksburg | — | |
| Yegua | — | |
| Catahoula | — |
Natho A42-123-32429
1.7 KM · Petrohawk Operating Company · Section with this well →
| Pecan Gap | 12,855 | -12,551 |
| Austin Chalk | 13,073 | -12,769 |
| Eagle Ford | 13,537 | -13,233 |
Natho B42-123-32483
1.9 KM · Petrohawk Operating Company · Section with this well →
| Pecan Gap | 12,859 | -12,591 |
| Austin Chalk | 13,110 | -12,842 |
| Eagle Ford | 13,513 | -13,245 |
| Eagle Ford | 13,513 | -13,245 |
Hamilton a-Kickendahl Unit 1 SA642-123-35547
2.4 KM · BPX Operating Company · Section with this well →
| Wilcox | 5,804 | -5,509 |
| Austin Chalk | 13,005 | -12,710 |
| Eagle Ford | 13,392 | -13,097 |
| Catahoula | — | |
| Vicksburg | — | |
| Frio | — | |
| Yegua | — | |
| 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/12335229, documented in the API reference.