TEXAS · WELLS · DE WITT COUNTY · ZIMMERMAN 01 LEASE · API 42-123-33096 · DISTRICT 02
Zimmerman 01 #01H
De Witt County · De Witt (Eagle Ford Shale) field · Producing · Horizontal
Zimmerman 01 #01H (API 42-123-33096) is a horizontal well in De Witt County operated by Marathon Oil EF LLC, completed July 11, 2013 and listed as producing on the RRC schedule, shut in August 1, 2026.
The RRC has issued one drilling permit, issued March 12, 2013, permitted to 13,806 ft.
It was permitted by Pioneer Natural Res. USA, Inc. and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Midway, Austin Chalk, Top Egfd.
Its lease has reported 71.4K barrels of oil and 1.94M mcf of gas since July 2013, last reporting volume in April 2026.
Operator of record
Permitted by Pioneer Natural Res. USA, Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
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 | Pioneer Natural Res. USA, Inc.Mar 12, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,806
- total depth, ft
- 1
- permits on file
- Mar 12, 2013
- last permit issued
- Jul 11, 2013
- completed
- 71.4K
- cumulative oil, bbl
- 1.94M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2013 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 11, 2013
- Shut in
- Aug 1, 2026
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Zimmerman 01 G-2-271351 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | 1 | 71.4K | 1.94M | Jul 2013 – Apr 2026 |
Gas, mcf lease total
Last 12 months 17,473 · prior 12 34,916(-50%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Jul 2013 → Sep 2019
- 2Ensign Operating LLCOct 2019 → Feb 2023
- 3Marathon Oil EF LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 758226-99 | Drill | Pioneer Natural Res. USA, Inc. | Mar 8, 2013 | Mar 12, 2013 | Apr 26, 2013 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 11, 2013 | Zimmerman 01 G-2-271351 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | Producing · shut in Aug 1, 2026 | 13,806 |
Formation tops
As filed on W-2/G-1. Subsea from 274 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Midway | 9,646 | -9,372 |
| Austin ChalkAUSTIN CHALK, UPPER | 13,148 | -12,874 |
| Top Egfd | 13,790 | -13,516 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,920 | 18,401 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,389 | 17.5 | 1,261 S |
| 9.625 | 10,296 | 12.25 | 642 S |
| 5.5 | 18,533 | 8.5 | 1,720 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Feb 13, 2014 | Oct 23, 2013 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received May 23, 2016. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Midway, Austin Chalk, Top Egfd | TIFF | 1,500 to 18,533 | May 23, 2016run May 14, 2013 | 9.60 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-123-33096 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-123-33096 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/12333096, documented in the API reference.