42-461-00199

Final Completion

PEGASUS PENNSYLVANIAN UNIT

UPTON County · District 7 · COG OPERATING LLC · PEGASUS (PENNSYLVANIAN)

Permits

Max Depth

13,217 ft

First Permit

1986-06-13

Latest Activity

1997-04-15

Lifespan

11 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1981-09-03

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: COG OPERATING LLC ≠ Production: XTO ENERGY INC. (reported 2026-04)

EWA / Permit operator mismatch

Scheduling: COG OPERATING LLC ≠ Permit: MOBIL PRODUCING TX. & N.M. INC.

Resolved via: production → XTO ENERGY INC.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

MOBIL PRODUCING TX. & N.M. INC. 1993-2011→ XTO ENERGY INC. 2012-2026

Lease Production

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

Formation Tops (5) Elevation 2,017 ft (DF)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SPRBY	7,655 ft	-5,638 ft
PENN (Pennsylvanian)	10,195 ft	-8,178 ft
DEVONIAN	11,500 ft	-9,483 ft
ELLENBURGER	12,778 ft	-10,761 ft
ELLEN.	12,920 ft	-10,903 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 (3)

Interval	Type
10,285–10,350 ft	Perforated
11,830–11,908 ft	Perforated
12,789–13,106 ft	Open hole

Casing (5)

Size	Set Depth	Cement
16"	467 ft	475 sx
10.75"	4,680 ft	375 sx
8.625"	9,183 ft	350 sx
2.375"	10,129 ft	—
5.5"	13,175 ft	400 sx

Permit History (2)

#461052 Recompletion Final Completion

PEGASUS FIELD UNIT #3 · 12,700 ft

1997-04-15

Spud 1997-05-17

#303217 Recompletion Final Completion

PEGASUS ELLENBURGER UNIT · 13,217 ft

1986-06-13

Applications (2)

#461052 A MOBIL PRODUCING TX. & N.M. INC.

received 1997-04-11

#303217 A MOBIL PRODUCING TX. & N.M. INC.

received 1986-06-13

Records & Logs

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

W-2/G-1 1997-07-07 log on file

W-2/G-1 1997-11-17

W-2/G-1 1986-08-18 log on file

W-2/G-1 1981-09-30

W-2/G-1 1984-01-12

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 UPTON County.

Well Details

Well Number: 2403
Max Depth: 13,217 ft
Drill Type: Vertical
County: UPTON
District: 7
Operator: COG OPERATING LLC
Completed: 1981-09-03

Operator

Name: COG OPER LLC
Location: MIDLAND
P-5 Status: X (filed 2026-06-02)
Cum Oil (all leases): 645,285,792 bbl
Cum Gas (all leases): 305,183,488 mcf
Activities: OPRS/G, OPRS/O
Total Permits: 4,550