42-371-34603

Final Completion

LONGFELLOW

PECOS County · District 8 · RIATA ENERGY INC. · PINON (OVERTHRUST)

Permits

Max Depth

12,483 ft

First Permit

1983-11-18

Latest Activity

1999-03-26

Lifespan

15 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1984-08-01

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: RIATA ENERGY INC. ≠ Production: LONGFELLOW ENERGY, LP (reported 2026-04)

Resolved via: production → LONGFELLOW ENERGY, LP

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

FINA OIL & CHEMICAL COMPANY 1993-1998→ RIATA ENERGY, INC. 1998-2006→ SANDRIDGE ENERGY, INC. 2006-2009→ SANDRIDGE EXPL. AND PROD., LLC 2009-2016→ OCCIDENTAL W TX OVERTHRUST, INC. 2016-2021→ LONGFELLOW ENERGY, LP 2022-2026

Lease Production

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

Formation Tops (11) Elevation 4,192 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
TESNUS	2,704 ft	+1,488 ft
TESNUS SAND	2,704 ft	+1,488 ft
1ST CABALLOS	4,700 ft	-508 ft
1ST CABALLOS NOV.	4,700 ft	-508 ft
2ND CABALLOS	7,400 ft	-3,208 ft
2ND CABALLOS NOV.	7,400 ft	-3,208 ft
SUB THRUST	7,900 ft	-3,708 ft
SUB-THRUST	7,900 ft	-3,708 ft
1ST MISSISSIPIAN	8,900 ft	-4,708 ft
1ST MISSISSIPPIAN (Mississippian)	8,900 ft	-4,708 ft
1ST ATOKA (Atoka)	11,400 ft	-7,208 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
2,710–2,798 ft	Perforated
3,110–3,172 ft	Perforated
3,470–3,642 ft	Perforated
7,631–7,738 ft	Perforated

Casing (5)

Size	Set Depth	Cement
13.375"	1,410 ft	1,425 sx
8.625"	4,150 ft	750 sx
4.5"	10,900 ft	250 sx
6.625"	11,266 ft	846 sx
6.625"	11,272 ft	846 sx

Permit History (2)

#483505 Recompletion Final Completion

LONGFELLOW · 12,483 ft

1999-03-26

Spud 2002-01-19

#220970 Drill Final Completion

GREEN, J. A. 4 · 10,000 ft

1983-11-18

Spud 1983-12-08

Applications (3)

#483505 A RIATA ENERGY, INC.

received 1999-03-26

#220970 A TENNECO OIL CO.

received 1985-01-22

#220970 A TENNECO OIL CO.

received 1983-11-01

Records & Logs

4 completion filings on record · 1 with log images at RRC.

W-2/G-1 2002-04-04 log on file

W-2/G-1 2002-06-11

W-2/G-1 1984-12-13

W-2/G-1 1984-11-03

Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library 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 PECOS County.

Well Details

Well Number: 403
Max Depth: 12,483 ft
Drill Type: Vertical
County: PECOS
District: 8
Operator: RIATA ENERGY INC.
Completed: 1984-08-01

Operator

Name: RIATA ENGY, INC
Location: OKLAHOMA CI, TY
P-5 Status: Delinquent (filed 2006-08-21)
Cum Oil (all leases): 916,339 bbl
Cum Gas (all leases): 282,157,564 mcf
Total Permits: 588