42-227-36244

CHALK, G. O. C

HOWARD County · District 8 · CONOCOPHILLIPS COMPANY

Permits

Max Depth

4,600 ft

First Permit

2009-07-29

Latest Activity

2012-01-18

Lifespan

2 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

CONOCO INC. 1993-2002→ CONOCOPHILLIPS COMPANY 2003-2018→ CITATION OIL & GAS CORP. 2018-2026

Lease Production

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

Formation Tops (9) Elevation 2,681 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
YATES	1,444 ft	+1,237 ft
QUEEN	1,734 ft	+947 ft
GRAYBURG	2,049 ft	+632 ft
SAN ANDRES	2,354 ft	+327 ft
GLORIETA	2,897 ft	-216 ft
CLEAR FORK	3,216 ft	-535 ft
CLEARFORK (Clear Fork)	3,216 ft	-535 ft
TUBB	3,802 ft	-1,121 ft
WCAB	4,351 ft	-1,670 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 (6)

Interval	Type
2,315–2,339 ft	Perforated
2,344–2,730 ft	Perforated
2,932–3,208 ft	Perforated
3,226–3,744 ft	Perforated
3,226–4,138 ft	Perforated
3,824–4,138 ft	Perforated

Casing (2)

Size	Set Depth	Cement
8.625"	996 ft	650 sx
5.5"	4,503 ft	1,100 sx

Permit History (2)

#731397 Field Transfer

CHALK, G. O. C · 4,600 ft

2012-01-18

#683405 Drill Final Completion

CHALK, G. O. C · 4,600 ft

2009-07-29

Spud 2009-08-17

Applications (2)

#731397 A CONOCOPHILLIPS COMPANY

received 2012-01-10

#683405 A CONOCOPHILLIPS COMPANY

received 2009-07-23

Records & Logs

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

W-2/G-1 2013-02-22

W-2/G-1 2009-10-22 log on file

W-2/G-1 2010-01-06

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: 31
Max Depth: 4,600 ft
Drill Type: Vertical
County: HOWARD
District: 8
Operator: CONOCOPHILLIPS COMPANY

Operator

Name: CONOCOPHILLIPS CO
Location: MIDLAND
P-5 Status: Active (filed 2026-02-03)
Cum Oil (all leases): 82,638,100 bbl
Cum Gas (all leases): 2,799,661,718 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits: 3,280