← Wells

42-003-46378

PRODUCING Horizontal

SERAPHINA 4521

ANDREWS County · District 8 · COG OPERATING LLC · SPRABERRY (TREND AREA)

Permits

2

Max Depth

12,500 ft

First Permit

2014-07-24

Latest Activity

2014-07-24

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2015-02-11

Shut-In

—

Plugged

—

P-5 Org Status: X

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2015-02

Last Production

2026-07

Operator History

Chain of Custody

OXY USA INC. 2015-2017→ COG OPERATING LLC 2017-2026

Lease Production

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

Oil
production & DCA →

Formation Tops (10) Elevation 2,879 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
YATES 2,930 ft-51 ft
SEVEN RIVERS 3,235 ft-356 ft
QUEEN 4,025 ft-1,146 ft
GRAYBURG 4,799 ft-1,920 ft
SAN ANDRES - CO2 FLOOD, HIGH FLO (San Andres)4,982 ft-2,103 ft
CLEARFORK (Clear Fork)6,951 ft-4,072 ft
GLORIETA ——
HOLT ——
PERMIAN DETRITAL (Permian (undifferentiated))——
TUBB ——

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 ↗

Offset Well Tops (nearest 8 wells with tops)

What nearby completed wells reported.

Cross-section
✓ 42-003-46400 SERAPHINA 4522 · OXY USA INC.
0.1 mi
Tubb —Permian (undifferentiated) —Seven Rivers —Clear Fork —Grayburg —Yates —Glorieta —Queen —San Andres —Holt —
✓ 42-003-46486 SERAPHINA 4523 · OXY USA INC.
0.1 mi
Yates 2,929'Seven Rivers 3,225'Queen 4,009'Grayburg 4,790'San Andres 4,984'Clear Fork 6,949'Spraberry 8,163'Pennsylvanian —Glorieta —Holt —LEON —Dean — +6 more
✓ 42-003-46549 SERAPHINA 4524 · OXY USA INC.
0.1 mi
Queen 4,250'Grayburg 4,800'San Andres 5,021'Clear Fork 6,950'Permian (undifferentiated) —Seven Rivers —Yates —Glorieta —Holt —Tubb —
✓ 42-003-46720 SERAPHINA 4552 · OXY USA INC.
0.2 mi
Yates 2,933'Queen 4,012'Grayburg 4,800'San Andres 4,981'Permian (undifferentiated) —Clear Fork —Seven Rivers —Holt —Tubb —Glorieta —
✓ 42-003-46719 SERAPHINA 4551 · OXY USA INC.
0.2 mi
Yates 2,932'Queen 4,011'Grayburg 4,800'San Andres 4,980'Tubb —Permian (undifferentiated) —Clear Fork —Seven Rivers —Glorieta —Holt —
✓ 42-003-46861 SERAPHINA 4563 · OXY USA INC.
0.3 mi
Yates 2,911'Queen 3,949'Grayburg 4,754'San Andres 4,943'Seven Rivers —Glorieta —Holt —Tubb —Permian (undifferentiated) —Clear Fork —
✓ 42-003-48840 MABEE DDA HZ1 · COG OPERATING LLC
0.5 mi
Santa Rosa 1,241'Yates 2,973'Seven Rivers 3,334'Queen 3,681'Grayburg 4,653'San Andres 4,713'Glorieta 5,831'Clear Fork 6,925'Tubb —Holt —
✓ 42-003-46249 SERAPHINA 4516 · OXY USA INC.
0.5 mi
Yates 2,972'Seven Rivers 3,271'Queen 4,060'Grayburg 4,798'San Andres 4,984'Clear Fork 6,960'Glorieta —Holt —Tubb —Permian (undifferentiated) —

Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).

Perforations (1)

IntervalType
9,913–18,708 ftPerforated

Casing (3)

SizeSet DepthCement
13.375"1,718 ft1,060 sx
9.625"6,295 ft1,280 sx
5.5"19,257 ft460 sx

Permit History (2)

#788241 Drill

SERAPHINA · 12,500 ft

2014-07-24

Spud 2014-08-19

#788241 Drill Final Completion

SERAPHINA 4521 · 12,500 ft

2014-07-24

Spud 2014-08-19

Applications (2)

#788241 A COG OPERATING LLC
received 2019-11-05
#788241 A OXY USA INC.
received 2014-05-29

Records & Logs

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

W-2/G-1 2019-09-04
W-2/G-1 2017-06-26 log on file
W-2/G-1 2016-03-09 log on file
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.

Google Maps → Explorer Map →
Lat 32.187525
Lon -102.239036

Well Details

Well Number
4521H
Max Depth
12,500 ft
Drill Type
Horizontal
County
ANDREWS
District
8
Operator
COG OPERATING LLC
Completed
2015-02-11

Operator

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
4,538