WELL · 42-251-31596 · DISTRICT 9
Mildred #1H
Johnson County · Newark East (Barnett Shale) field · Horizontal
Mildred #1H (API 42-251-31596) is a plugged horizontal well in Johnson County, plugged October 31, 2025, last operated by Upp Operating LLC.
The RRC has issued one drilling permit (amended once), issued March 23, 2007, permitted to 7,800 ft.
It was permitted by Eog Resources, Inc. and has since transferred to Upp Operating LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Strawn, Atoka, Bend, Hood.
Operator of record
Permitted by EOG Resources, Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 6, 2026
- Permits on file
- 33
- Phone
- (713) 495-5300
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Upp Operating LLC |
| Production reports | Upp Operating, LLCthrough Oct 2025 |
| Latest permit | EOG Resources, Inc.Mar 23, 2007 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,800
- total depth, ft
- 2
- permits on file
- Mar 23, 2007
- last permit issued
- Feb 24, 2008
- completed
- 0
- cumulative oil, bbl
- 530K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2008 THROUGH Oct 2025
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 24, 2008
- Shut in
- —
- Plugged
- Oct 31, 2025
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 |
|---|---|---|---|---|---|---|
| Mildred G-13-238579 | Newark, East (Barnett Shale) | Upp Operating, LLC | 1 | 0 | 530K | Feb 2008 – Oct 2025 |
Gas, mcf lease total
Last 12 months 2,329 · prior 12 203(+1047%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1EOG Resources, Inc.Feb 2008 → Dec 2016
- 2Enervest Operating, L.L.C.Jan 2017 → Mar 2019
- 3Upp Operating, LLCApr 2019 → Oct 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 635327-98 | Drill | EOG Resources, Inc. | May 4, 2007 | Mar 23, 2007 | Jun 22, 2007 | 7,800 |
| 635327-99 | Drill | EOG Resources, Inc. | Mar 15, 2007 | Mar 23, 2007 | — | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-13-238579 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 814 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,200 | 9,150 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,249 | 12.25 | 345 S |
| 4.5 | 9,392 | 8.75 | 930 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 | Sep 25, 2008 | Apr 15, 2008 | Yes |
| 00 | Sep 9, 2008 | — | — |
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 42-251-31596 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-251-31596 → 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/25131596, documented in the API reference.