WELL · 42-211-31166 · DISTRICT 10

Mathers Ranch #40

Mathers Ranch #40 (API 42-211-31166) is a permitted well in Hemphill County filed by Devon Energy Production CO, L.P.; no completion report is on file yet.

The RRC has issued 3 drilling permits between 1979 and 2010, permitted to 11,900 ft.

Operator of record

Devon Energy Production Co, L.P.

Oklahoma City, OK · P-5 Y, filed Nov 4, 2025 · 9,266 permits on file · (800) 465-8314

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	none
Production reports	Devon Energy Production Co, L.P.through Jun 2015
Latest permit	Devon Energy Production Co, L.P.Jan 6, 2010

11,900: total depth, ft
3: permits on file
Jan 6, 2010: last permit issued
—: completed
0: cumulative oil, bbl
229K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Aug 2018

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: —
Shut in: —
Plugged: —

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
Mathers Ranch 157 G-14-91084	Canadian, SE (Douglas)	Tecolote Energy Operating, LLC	1	0	229K	Jan 1993 – Aug 2018

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.

1Umc Petroleum CorporationJan 1993 → Jul 1998
2Ocean Energy, Inc.Aug 1998 → Aug 2003
3Devon Louisiana CorporationSep 2003 → Dec 2005
4Devon Energy Production Co, L.P.Jan 2006 → Jun 2015

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
689360-99	Recompletion	Devon Energy Production Co, L.P.	Jan 5, 2010	Jan 6, 2010	—	11,870
97949-99	Recompletion	McCulloch Oil Corp. of Texas	Oct 1, 1980	Oct 1, 1980	—	11,870
60913-99	Drill	McCulloch Oil Corp. of Texas	Oct 17, 1979	Oct 17, 1979	Oct 22, 1979	11,900

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— G-14-91084	—	—	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
6,971	7,056	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
8.625	2,618	12.25	1,600 S
2.375	6,912	—	—
5	11,500	7.875	450 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	Jan 12, 1984	Oct 14, 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 42-211-31166 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-211-31166 → 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/21131166, documented in the API reference.