42-227-33547

Final Completion

CHALK OTIS /EO/

HOWARD County · District 8 · CIMAREX ENERGY CO. OF COLORADO · HOWARD GLASSCOCK

Permits

Max Depth

4,001 ft

First Permit

1984-10-25

Latest Activity

2001-03-20

Lifespan

16 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1985-08-22

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: CIMAREX ENERGY CO. OF COLORADO ≠ Production: GRAYROCK ENERGY II, LLC (reported 2026-04)

EWA / Permit operator mismatch

Scheduling: CIMAREX ENERGY CO. OF COLORADO ≠ Permit: PRIZE OPERATING COMPANY

Resolved via: production → GRAYROCK ENERGY II, LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Injection / Disposal

HOWARD County disposal market →

H-1 Injection Cancelled 2002-10-15 UIC #000055795 permitted 1985-04-03

Permitted Volume

—

Max Pressure

850 psi

Injection Interval

—

Injected (12mo)

—

Operator History

Chain of Custody

WOOD, MCSHANE & THAMS 1993-1995→ VISTA RESOURCES, INC. (A) 1995-2000→ PRIZE OPERATING COMPANY 2000-2002→ GRUY PETROLEUM MANAGEMENT CO. 2002-2006→ CIMAREX ENERGY CO. OF COLORADO 2006-2012→ MERIT ENERGY COMPANY 2013-2017→ ROVER PETROLEUM OPERATING, LLC 2017-2023→ GRAYROCK ENERGY II, LLC 2024-2026

Lease Production

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

Formation Tops (5) Elevation 2,626 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
7 RIVERS (Seven Rivers)	1,438 ft	+1,188 ft
SEVEN RIVERS	1,438 ft	+1,188 ft
QUEEN	1,650 ft	+976 ft
SAN ANDRES	1,922 ft	+704 ft
GLORIETA	2,775 ft	-149 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
1,656–1,818 ft	Perforated
2,149–2,415 ft	Perforated
2,810–3,132 ft	Perforated

Casing (3)

Size	Set Depth	Cement
8.625"	299 ft	200 sx
5.5"	2,416 ft	350 sx
4"	3,220 ft	175 sx

Permit History (3)

#505626 Recompletion Final Completion

CHALK, OTIS /EO/ · 4,001 ft

2001-03-20

Spud 2001-04-23

#473463 Recompletion Final Completion

CHALK, E. O. · 3,200 ft

1998-02-24

Spud 1998-02-19

#255638 Drill Final Completion

CHALK, OTIS "EO" · 2,400 ft

1984-10-25

Applications (3)

#505626 A PRIZE OPERATING COMPANY

received 2001-02-21

#473463 A VISTA RESOURCES, INC. (A)

received 1998-02-17

#255638 A WOOD, MCSHANE & THAMS

received 1984-10-12

Records & Logs

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

W-2/G-1 2001-06-15

W-2/G-1 2001-03-28 log on file

W-2/G-1 2001-08-20

W-2/G-1 1988-11-29 log on file

W-2/G-1 1988-12-31

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 HOWARD County.

Well Details

Well Number: 6
Max Depth: 4,001 ft
Drill Type: Vertical
County: HOWARD
District: 8
Operator: CIMAREX ENERGY CO. OF COLORADO
Completed: 1985-08-22

Operator

Name: CIMAREX ENGY CO. OF COLORADO
Location: MIDLAND
P-5 Status: Delinquent (filed 2025-04-28)
Cum Oil (all leases): 23,631,926 bbl
Cum Gas (all leases): 190,164,266 mcf
Activities: OPRS/G, OPRS/O
Total Permits: 476