42-103-33798

Final Completion

SAND HILLS TUBB UNIT

CRANE County · District 8 · FORMENTERA OPERATIONS LLC · SAND HILLS (TUBB)

Permits

Max Depth

5,000 ft

First Permit

1987-03-20

Latest Activity

2023-08-11

Lifespan

36 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1987-07-13

Shut-In

—

Plugged

—

EWA / Permit operator mismatch

Scheduling: FORMENTERA OPERATIONS LLC ≠ Permit: SLANT OPERATING, LLC

Resolved via: production → FORMENTERA OPERATIONS LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

MOBIL PRODUCING TX. & N.M. INC. 1993-1996→ TITAN RESOURCES I, INC. 1996-2000→ PURE RESOURCES, L.P. 2000-2002→ HOME-STAKE OIL & GAS COMPANY 2002-2002→ CORTEZ OPERATING COMPANY 2002-2004→ ENCORE OPERATING, L.P. 2004-2009→ ENCORE ENERGY PARTNERS OPER LLC 2009-2012→ VANGUARD PERMIAN, LLC 2012-2015→ VANGUARD OPERATING, LLC 2015-2019→ GRIZZLY OP OF DELAWARE, LLC 2019-2021→ CONTANGO RESOURCES, INC. 2021-2021→ CONTANGO RESOURCES, LLC 2022-2022→ SLANT OPERATING, LLC 2022-2023→ FORMENTERA OPERATIONS LLC 2023-2026

Lease Production

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

Formation Tops (7) Elevation 2,650 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
JUDKINS	2,645 ft	+5 ft
MCKNIGHT	3,200 ft	-550 ft
GLORIETA/SAN ANGELO (Glorieta)	3,595 ft	-945 ft
SAN ANGELO	3,595 ft	-945 ft
HOLT SHALE (Holt)	3,640 ft	-990 ft
TUBB	4,330 ft	-1,680 ft
WICHITA ALBANY (Wichita-Albany)	4,816 ft	-2,166 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 ↗

Offset Well Tops (nearest 8 wells with tops)

What nearby completed wells reported.

Cross-section

✓ 42-103-35081 SAND HILLS TUBB UNIT · SLANT OPERATING, LLC

0.2 mi

McKnight 3,200'Holt 3,872'Clear Fork 4,085'Clear Fork 4,085'Tubb 4,390'

✓ 42-103-33091 SAND HILL TUBB UNIT · SLANT OPERATING, LLC

0.3 mi

MCELROY 2,360'San Andres 2,680'JUDKINS 2,724'JUDKINS INTERMEDIATE 2,940'McKnight 3,136'San Angelo 3,486'Tubb 4,296'

✓ 42-103-37279 LEA, P. J. A/C 2 · SLANT OPERATING, LLC

0.5 mi

Rustler 474'Yates 1,490'Seven Rivers 1,716'Queen 2,234'Grayburg 2,355'San Andres 2,667'San Angelo —Clear Fork —Glorieta —Permian (undifferentiated) —

✓ 42-103-03596 LEA, P. J. · SLANT OPERATING, LLC

0.7 mi

MCELROY 2,344'McKnight 3,122'San Angelo 3,510'Tubb 4,300'

✓ 42-103-35008 SAND HILL TUBB UNIT · SLANT OPERATING, LLC

0.8 mi

McKnight 3,300'Clear Fork 4,050'Tubb 4,329'Tubb 4,404'Tubb 4,666'Wichita-Albany 4,890'Wichita-Albany 4,890'

✓ 42-103-35007 SAND HILL TUBB UNIT · SLANT OPERATING, LLC

0.9 mi

MCELROY 2,344'McKnight 3,122'San Angelo 3,500'Tubb 4,214'

✓ 42-103-35028 SAND HILL TUBB UNIT · SLANT OPERATING, LLC

1.0 mi

MCELROY 2,660'JUDKINS 3,018'McKnight 3,485'San Angelo 3,915'San Angelo 3,915'Holt 4,115'Tubb 4,690'

✓ 42-103-35078 SAND HILLS TUBB UNIT · SLANT OPERATING, LLC

1.0 mi

San Angelo 3,500'Clear Fork 3,950'Clear Fork 3,950'Tubb 4,240'Wichita-Albany 4,900'WITCHITA-ALBANY 4,900'Wichita-Albany 4,900'

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 (2)

Interval	Type
3,272–3,404 ft	Perforated
4,373–4,567 ft	Perforated

Casing (2)

Size	Set Depth	Cement
8.625"	520 ft	375 sx
5.5"	4,900 ft	1,470 sx

Permit History (2)

#892710 Recompletion Final Completion

LEA, P. J. A/C 2 · 4,900 ft

2023-08-11

#327947 Drill Final Completion

SAND HILLS TUBB UNIT · 5,000 ft

1987-03-20

Applications (2)

#892710 A SLANT OPERATING, LLC

received 2023-08-08

#327947 A MOBIL PRODUCING TX. & N.M. INC.

received 1987-03-19

Records & Logs

3 completion filings on record · 1 with log images at RRC.

W-2/G-1 2023-10-05

W-2/G-1 1987-08-06 log on file

W-2/G-1 1987-08-15

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 31.480562

Lon -102.581691

Well Details

Well Number: 59
Max Depth: 5,000 ft
Drill Type: Vertical
County: CRANE
District: 8
Operator: FORMENTERA OPERATIONS LLC
Completed: 1987-07-13

Operator

Name: FORMENTERA OPERATIONS LLC
Location: AUSTIN
P-5 Status: X (filed 2026-06-11)
Cum Oil (all leases): 7,170,117 bbl
Cum Gas (all leases): 53,235,974 mcf
Activities: CSGD/P, G/PUR, OPRS/G, OPRS/O
Total Permits: 80