WELL · 42-371-05371 · DISTRICT 8

Delker Mary JO #1

Plugged

Pecos County · Fort Stockton (Yates 3300) field · Vertical

Delker Mary JO #1 (API 42-371-05371) is a plugged well in Pecos County, plugged May 27, 1972, last operated by Mobil Oil Corporation.

The RRC has issued one drilling permit, issued July 29, 1996, permitted to 3,285 ft.

It was permitted by Younger Energy Company and has since transferred to Mobil Oil Corporation on the wellbore schedule.

Completion filings report one formation top, including Yates.

Operator of record

Mobil Oil Corporation

Permitted by Younger Energy Company; the EWA schedule now lists a different operator.

Houston, TX · P-5 Y, filed Feb 4, 2026 · 1,487 permits on file

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Mobil Oil Corporation
Production reports	none
Latest permit	Younger Energy CompanyJul 29, 1996

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

3,285: total depth, ft
1: permits on file
Jul 29, 1996: last permit issued
—: completed
0: cumulative oil, bbl
0: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Mar 1998 THROUGH Jul 2001

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: —
Shut in: —
Plugged: May 27, 1972

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
Delker, Mary JO O-10-35970	Fort Stockton	Younger Energy Company	1	0	0	Mar 1998 – Jul 2001

No volumes reported on these leases in the last three years.

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
450347-99	Reenter	Younger Energy Company	Jul 24, 1996	Jul 29, 1996	Jul 29, 1996	3,285

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-10-35970	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 2,858 ft elevation.Download CSV →

Formation	MD ft	Subsea
Yates	2,850	8

Perforations

Perforated and open-hole intervals.

From	To	Type
2,792	2,797	Perforated
2,802	2,807	Perforated
2,810	2,830	Perforated
—	3,252	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
10.75	425	12.25	250 S
6.625	2,907	7.875	150 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 →

Filed	W-2 / G-1 date	Logs referenced
Apr 6, 1999	Dec 9, 1998	Yes
Mar 31, 1999	—	—
Jan 12, 1984	—	—

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 42-371-05371 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-371-05371 → scanned completion filings

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/37105371, documented in the API reference.