42-115-33418

Final Completion

COZART A

DAWSON County · District 8 · CAMBRIAN MANAGEMENT LTD. · SPRABERRY (TREND AREA)

Permits

Max Depth

12,700 ft

First Permit

2011-07-07

Latest Activity

2014-03-03

Lifespan

3 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2011-11-01

Shut-In

—

Plugged

2024-08-23

EWA / Production operator mismatch

Scheduling: CAMBRIAN MANAGEMENT LTD. ≠ Production: EOG RESOURCES, INC. (reported 2023-12)

EWA / Permit operator mismatch

Scheduling: CAMBRIAN MANAGEMENT LTD. ≠ Permit: HADAWAY CONSULT AND ENGINEER,LLC

Resolved via: scheduling → CAMBRIAN MANAGEMENT LTD.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2011-11

Last Production

2026-02

Operator History

Chain of Custody

BIG STAR OIL & GAS, LLC 2011-2012→ HADAWAY CONSULT AND ENGINEER,LLC 2012-2017→ MURPHY EXPL. & PROD. CO. - USA 2017-2019→ EXL PETROLEUM OPERATING II, INC. 2019-2020→ CGS OPERATING, LLC 2020-2020→ EOG RESOURCES, INC. 2020-2022

Lease Production

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

Formation Tops (8) Elevation 2,967 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SPRABERRY	9,210 ft	-6,243 ft
WOLFCAMP	9,550 ft	-6,583 ft
CANYON	10,772 ft	-7,805 ft
STRAWN	10,888 ft	-7,921 ft
STRAWN	10,952 ft	-7,985 ft
ATOKA	11,307 ft	-8,340 ft
ATOKA	11,477 ft	-8,510 ft
MISSISSIPPI (Mississippian)	11,780 ft	-8,813 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 (5)

Interval	Type
9,210–10,655 ft	Perforated
9,210–11,480 ft	Perforated
10,888–10,962 ft	Perforated
11,307–11,480 ft	Perforated
11,780–11,863 ft	Perforated

Casing (4)

Size	Set Depth	Cement
13.375"	418 ft	415 sx
9.625"	4,959 ft	1,200 sx
8.625"	4,959 ft	1,200 sx
5.5"	12,226 ft	1,300 sx

Permit History (2)

#778480 Recompletion Final Completion

COZART A · 12,345 ft

2014-03-03

Spud 2011-07-07

#719651 Drill Final Completion

COZART 'A' · 12,700 ft

2011-07-07

Spud 2011-07-06

Applications (2)

#778480 A HADAWAY CONSULT AND ENGINEER,LLC

received 2014-01-29

#719651 A CAMBRIAN MANAGEMENT, LTD.

received 2011-07-05

Records & Logs

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

W-2/G-1 2014-06-02

W-2/G-1 2012-11-07 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.

No GPS coordinates yet

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

Well Details

Well Number: 1R
Max Depth: 12,700 ft
Drill Type: Vertical
County: DAWSON
District: 8
Operator: CAMBRIAN MANAGEMENT LTD.
Completed: 2011-11-01

Operator

Name: CAMBRIAN MANAGEMENT, LTD
Location: MCCAULLEY
P-5 Status: Active (filed 2025-06-17)
Cum Oil (all leases): 3,829,799 bbl
Cum Gas (all leases): 1,544,534 mcf
Activities: OPRS/O
Total Permits: 107