TEXAS · WELLS · DE WITT COUNTY · JO ANN MUELLER 01 LEASE · API 42-123-32718 · DISTRICT 02
JO Ann Mueller 01 #01H
De Witt County · De Witt (Eagle Ford Shale) field · Producing · Horizontal
JO Ann Mueller 01 #01H (API 42-123-32718) is a horizontal well in De Witt County operated by Marathon Oil EF LLC, completed June 28, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 12, 2012, permitted to 13,939 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 Carrizo, Midway, Eagle Ford.
Its lease has reported 10.3K barrels of oil and 1.23M mcf of gas since June 2012, 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, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,939
- total depth, ft
- 1
- permits on file
- Mar 12, 2012
- last permit issued
- Jun 28, 2012
- completed
- 10.3K
- cumulative oil, bbl
- 1.23M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2012 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 28, 2012
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| JO Ann Mueller 01 G-2-268658 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | 1 | 10.3K | 1.23M | Jun 2012 – Apr 2026 |
Gas, mcf lease total
Last 12 months 7,123 · prior 12 7,024(+1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Jun 2012 → Sep 2019
- 2Ensign Operating LLCOct 2019 → Feb 2023
- 3Marathon Oil EF LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 734933-99 | Drill | Pioneer Natural Res. USA, Inc. | Feb 28, 2012 | Mar 12, 2012 | Mar 15, 2012 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 28, 2012 | JO Ann Mueller 01 G-2-268658 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | Producing | 13,939 |
Formation tops
As filed on W-2/G-1. Subsea from 236 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CarrizoCARRIZO/WILCOX | 6,339 | -6,103 |
| Midway | 9,539 | -9,303 |
| Eagle FordTOP EAGLE FORD | 13,775 | -13,539 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,962 | 18,002 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,208 | 17.5 | 900 S |
| 9.625 | 10,294 | 12.25 | 2,000 S |
| 5.5 | 18,260 | 8.5 | 1,540 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 | Jul 19, 2013 | Aug 27, 2012 | 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 42-123-32718 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-123-32718 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/12332718, documented in the API reference.