WELL · 42-393-30726 · DISTRICT 10
Mahler #4
Roberts County · Mendota NW. (Granite Wash SW.) field · Vertical
Mahler #4 (API 42-393-30726) is a plugged well in Roberts County, plugged September 23, 2024, last operated by Unit Petroleum Company.
The RRC has issued 3 drilling permits between 1979 and 1985, permitted to 10,600 ft.
It was permitted by Amoco Production Company and has since transferred to Unit Petroleum Company on the wellbore schedule.
Completion filings report 5 formation tops, including Douglas, Tonkawa, Kansas City, Des Moines.
Its lease has reported 119K barrels of oil and 2.5M mcf of gas since January 1993, last reporting in July 2026. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Amoco Production Company; the EWA schedule now lists a different operator.
- 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 May 2012 |
| Latest permit | Amoco Production CompanyMay 22, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,600
- total depth, ft
- 3
- permits on file
- May 22, 1985
- last permit issued
- Mar 3, 2006
- completed
- 119K
- cumulative oil, bbl
- 2.5M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 3, 2006
- Shut in
- —
- Plugged
- Sep 23, 2024
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; they carry 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mahler O-14-5257 | Mendota, NW. (Granite Wash, SW.) | Unit Petroleum Company | 8 | 119K | 2.5M | Jan 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Unit Petroleum CompanyJan 1993 → Jan 2012
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 275580-99 | Recompletion | Amoco Production Company | May 14, 1985 | May 22, 1985 | — | 10,600 |
| 206474-99 | Recompletion | Amoco Production Company | Aug 11, 1983 | Aug 18, 1983 | Oct 18, 1983 | 10,600 |
| 56215-99 | Drill | Amoco Production Company | Aug 22, 1979 | Aug 22, 1979 | Sep 2, 1979 | 10,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 3, 2006 | Mahler O-14-5257 | Mendota NW. (Granite Wash SW.) | Unit Petroleum Company | Plugged | — |
| Oct 28, 1983 | Mahler O-14-5061 | Mendota NW. (Douglas Lo.) | Unit Petroleum Company | Plugged | — |
| Nov 10, 1979 | Mahler G. A. G-14-86709 | Mendota NW. (Granite Wash SW.) | Amoco Production Company | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,871 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Douglas | 4,062 | -1,191 |
| Tonkawa | 4,812 | -1,941 |
| Kansas City | 5,204 | -2,333 |
| Des Moines | 6,075 | -3,204 |
| Granite Wash | 6,644 | -3,773 |
| Douglas | 6,948 | -4,077 |
| Tonkawa | 7,698 | -4,827 |
| Kansas City | 8,090 | -5,219 |
| Des Moines | 8,961 | -6,090 |
| Granite Wash | 9,530 | -6,659 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,270 | 7,280 | Perforated |
| 9,822 | 9,840 | Perforated |
| 9,846 | 9,856 | Perforated |
| 10,026 | 10,038 | Perforated |
| 10,042 | 10,090 | Perforated |
| 10,472 | 10,495 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,646 | 12.25 | 1,010 S |
| 8.625 | 1,647 | 12.25 | 1,040 S |
| 2.875 | 7,302 | — | — |
| 2.375 | 10,463 | — | — |
| 5.5 | 10,600 | 7.875 | 250 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 | Nov 6, 2006 | May 22, 2006 | — |
| 00 | Jun 14, 1985 | May 29, 1985 | — |
| 00 | Jun 11, 1985 | — | — |
| 00 | Jan 12, 1984 | Dec 1, 1983 | — |
| 00 | Jan 12, 1984 | Jan 17, 1980 | — |
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 42-393-30726 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-393-30726 → 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/39330726, documented in the API reference.