TEXAS · WELLS · HEMPHILL COUNTY · MAHLER LEASE · API 42-211-34973 · DISTRICT 08
Mahler #4138H
Hemphill County · Mendota NW. (Granite Wash) field · Producing · Horizontal
Mahler #4138H (API 42-211-34973) is a horizontal well in Hemphill County operated by Unit Petroleum Company, completed March 24, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 4, 2011, permitted to 9,510 ft.
Completion filings report 5 formation tops, including Brown Dolomite, Douglas, Kansas City, Marmaton.
Its lease has reported 50.5K barrels of oil and 616K mcf of gas since March 2012, last reporting volume in April 2026.
Operator of record
- Based in
- Tulsa, OK
- P-5 status
- Active (A)
- P-5 last filed
- Jan 13, 2025
- Permits on file
- 1,100
- Phone
- (918) 493-7700
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Unit Petroleum Company |
| Production reports | Unit Petroleum Companythrough Apr 2026 |
| Latest permit | Unit Petroleum CompanyNov 4, 2011 |
- 9,510
- total depth, ft
- 1
- permits on file
- Nov 4, 2011
- last permit issued
- Mar 24, 2012
- completed
- 50.5K
- cumulative oil, bbl
- 616K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2012 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 24, 2012
- 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 |
|---|---|---|---|---|---|---|
| Mahler G-14-267979 | Mendota, NW. (Granite Wash) | Unit Petroleum Company | 1 | 50.5K | 616K | Mar 2012 – Apr 2026 |
Gas, mcf lease total
Last 12 months 19,812 · prior 12 20,864(-5%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Unit Petroleum CompanyMar 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 727201-99 | Drill | Unit Petroleum Company | Oct 27, 2011 | Nov 4, 2011 | Jan 3, 2012 | 9,750 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 24, 2012 | Mahler G-14-267979 | Mendota NW. (Granite Wash) | Unit Petroleum Company | Producing | 9,510 |
Formation tops
As filed on W-2/G-1. Subsea from 2,508 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Brown Dolomite | 3,738 | -1,230 |
| Douglas | 6,540 | -4,032 |
| Kansas City | 7,710 | -5,202 |
| Marmaton | 8,660 | -6,152 |
| Granite Wash | 9,190 | -6,682 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,919 | 13,339 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,520 | 12.25 | 1,400 S |
| 7 | 9,908 | 8.75 | 220 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 | May 31, 2013 | Aug 9, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Oct 1, 2013. 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 Kansas City, Marmaton, Granite Wash | TIFF | 8,225 to 14,659 | Oct 1, 2013run Feb 1, 2012 | 1.26 |
"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 42-211-34973 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-34973 → 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/21134973, documented in the API reference.