TEXAS · WELLS · JOHNSON COUNTY · TOLBERT UNIT LEASE · API 42-251-33831 · DISTRICT 7C
Tolbert Unit #12H
Johnson County · Newark East (Barnett Shale) field · Producing · Horizontal · Directional
Tolbert Unit #12H (API 42-251-33831) is a horizontal well in Johnson County operated by Upp Operating LLC, completed July 6, 2010 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 10, 2009, permitted to 8,225 ft.
It was permitted by Eog Resources, Inc. and has since transferred to Upp Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Strawn, Atoka, Marble Falls, Barnett.
Its lease has reported 3.65M mcf of gas since July 2010, last reporting volume in April 2026.
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 Apr 2026 |
| Latest permit | EOG Resources, Inc.Dec 10, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,225
- total depth, ft
- 2
- permits on file
- Dec 10, 2009
- last permit issued
- Jul 6, 2010
- completed
- 0
- cumulative oil, bbl
- 3.65M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 6, 2010
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| Tolbert Unit G-13-258810 | Newark, East (Barnett Shale) | Upp Operating, LLC | 1 | 0 | 3.65M | Jul 2010 – Apr 2026 |
Gas, mcf lease total
Last 12 months 103,522 · prior 12 107,879(-4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1EOG Resources, Inc.Aug 2010 → Dec 2016
- 2Enervest Operating, L.L.C.Jan 2017 → Mar 2019
- 3Upp Operating, LLCApr 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 688406-98 | Drill | EOG Resources, Inc. | Jan 21, 2010 | Dec 10, 2009 | Feb 28, 2010 | 8,900 |
| 688406-99 | Drill | EOG Resources, Inc. | Dec 8, 2009 | Dec 10, 2009 | — | 8,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 6, 2010 | Tolbert Unit G-13-258810 | Newark East (Barnett Shale) | Upp Operating LLC | Producing | 8,225 |
Formation tops
As filed on W-2/G-1. Subsea from 588 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Strawn | 2,100 | -1,512 |
| Atoka | 3,980 | -3,392 |
| Marble Falls | 7,865 | -7,277 |
| BarnettBARNETT SHALE | 8,162 | -7,574 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,595 | 13,160 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,944 | 12.25 | 695 S |
| 5.5 | 13,250 | 8.5 | 1,460 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 7, 2011 | Nov 23, 2010 | 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 42-251-33831 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-251-33831 → 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/25133831, documented in the API reference.