42-227-33314

CHALK, MARY

HOWARD County · District 8 · MOBIL PRODUCING TX. & N.M. INC.

Permits

Max Depth

3,900 ft

First Permit

1984-02-16

Latest Activity

1988-03-18

Lifespan

4 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2012-04

Operator History

Chain of Custody

CONOCO INC. 1993-2002→ CONOCOPHILLIPS COMPANY 2003-2011

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 (7) Elevation 6,486 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
YATES	1,252 ft	+5,234 ft
SEVEN RIVERS	1,346 ft	+5,140 ft
QUEEN	1,574 ft	+4,912 ft
GRAYBURG	1,848 ft	+4,638 ft
SANDERS	1,952 ft	+4,534 ft
GLORIETTA (Glorieta)	2,582 ft	+3,904 ft
CLEARFORK (Clear Fork)	2,995 ft	+3,491 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 (8)

Interval	Type
2,906–2,914 ft	Perforated
2,996–? ft	Perforated
2,999–3,001 ft	Perforated
3,009–3,012 ft	Perforated
3,016–3,019 ft	Perforated
3,031–3,035 ft	Perforated
3,040–3,042 ft	Perforated
3,470–3,786 ft	Perforated

Casing (4)

Size	Set Depth	Cement
8.625"	288 ft	350 sx
8.625"	288 ft	—
5.5"	3,100 ft	600 sx
5.5"	3,100 ft	—

Permit History (3)

#343753 Recompletion U

CHALK, MARY · 3,900 ft

1988-03-18

#266324 Recompletion

CHALK, MARY · 3,900 ft

1985-02-11

#230902 Drill U

CHALK, MARY · 3,100 ft

1984-02-16

Spud 1984-02-16

Applications (3)

#343753 A MOBIL PRODUCING TX. & N.M. INC.

received 1988-03-11

#266324 Withdrawn MOBIL PRODUCING TX. & N.M. INC.

received 1984-12-21

#230902 A MOBIL PRODUCING TX. & N.M. INC.

received 1983-12-13

Records & Logs

3 completion filings on record.

W-2/G-1 1988-06-24

W-2/G-1 1984-09-19

W-2/G-1 1984-10-02

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: 66
Max Depth: 3,900 ft
Drill Type: Vertical
County: HOWARD
District: 8
Operator: MOBIL PRODUCING TX. & N.M. INC.

Operator

Name: SUPERIOR OIL CO, THE
Location: SPRING
P-5 Status: Active (filed 2025-06-04)
Cum Oil (all leases): 181,898,111 bbl
Cum Gas (all leases): 1,950,074,148 mcf
Activities: CSGD/G, GTHS/C, GTHS/G
Total Permits: 6,763