42-483-31562

Final Completion

EFFIE HAYES 18

WHEELER County · District 10 · DEVON ENERGY PRODUCTION CO L.P. · WEST PARK (UPPER MORROW)

Permits

Max Depth

15,700 ft

First Permit

1998-12-11

Latest Activity

2004-12-07

Lifespan

6 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1999-04-08

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: DEVON ENERGY PRODUCTION CO L.P. ≠ Production: MMGL TXPH, LLC (reported 2026-04)

Resolved via: production → MMGL TXPH, LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1999-04

Last Production

2026-07

Operator History

Chain of Custody

DEVON ENERGY CORPORATION(NEVADA) 1999-2000→ DEVON ENERGY PRODUCTION CO, L.P. 2000-2016→ TECOLOTE ENERGY OPERATING, LLC 2016-2019→ BLACKBEARD OPERATING, LLC 2020-2023→ MMGL TXPH, LLC 2023-2026

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Formation Tops (6) Elevation 2,596 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
BROWN DOLOMITE	4,610 ft	-2,014 ft
TONKAWA	9,470 ft	-6,874 ft
OSWEGO	10,961 ft	-8,365 ft
GRANITE WASH	12,222 ft	-9,626 ft
THREE FINGERS	14,994 ft	-12,398 ft
LOWER PURYEAR	15,464 ft	-12,868 ft

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗

Perforations (4)

Interval	Type
12,306–12,500 ft	Perforated
12,678–12,948 ft	Perforated
13,151–13,524 ft	Perforated
15,420–15,443 ft	Perforated

Casing (3)

Size	Set Depth	Cement
9.625"	3,085 ft	1,577 sx
7"	15,203 ft	190 sx
3.5"	15,699 ft	160 sx

Permit History (2)

#554502 Recompletion Final Completion

EFFIE HAYES 18 · 14,600 ft

2004-12-07

#481249 Drill Final Completion

HAYES, EFFIE 18 · 15,700 ft

1998-12-11

Spud 1999-01-22

Applications (2)

#554502 A DEVON ENERGY PRODUCTION CO, L.P.

received 2004-12-07

#481249 A DEVON ENERGY CORPORATION(NEVADA)

received 1998-12-03

Records & Logs

4 completion filings on record · 2 with log images at RRC.

W-2/G-1 2005-03-15 log on file

W-2/G-1 2005-07-06

W-2/G-1 1999-05-03 log on file

W-2/G-1 1999-06-04

Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images can't be deep-linked — clicking copies the API for you to paste.

No GPS coordinates yet

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in WHEELER County.

Well Details

Well Number: 1
Max Depth: 15,700 ft
Drill Type: Vertical
County: WHEELER
District: 10
Operator: DEVON ENERGY PRODUCTION CO L.P.
Completed: 1999-04-08

Operator

Name: PENNZENERGY EXP. & PROD., L.L.C
Location: OKLAHOMA CI, TY
P-5 Status: Active (filed 2025-12-18)
Cum Oil (all leases): 365,943,944 bbl
Cum Gas (all leases): 9,274,880,220 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits: 9,264