42-297-31866

Final Completion

GEFFERT GAS UNIT

LIVE OAK County · District 2 · SANCHEZ-O BRIEN OIL & GAS CORP. · GEORGE WEST W-SW (8400)

Permits

Max Depth

12,000 ft

First Permit

1978-11-17

Latest Activity

1984-03-23

Lifespan

5 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1979-01-21

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: SANCHEZ-O BRIEN OIL & GAS CORP. ≠ Production: SANDEL OPERATING COMPANY (reported 2026-04)

Resolved via: production → SANDEL OPERATING COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

SANCHEZ-O'BRIEN OIL & GAS CORP. 1993-1998→ SANCHEZ OIL & GAS CORPORATION 1998-1999→ COASTAL OIL & GAS CORPORATION 1999-2001→ EL PASO PRODUCTION OIL & GAS CO. 2001-2006→ EL PASO E & P COMPANY, L. P. 2006-2008→ SMITH PRODUCTION INC. 2008-2009→ SHERIDAN PRODUCTION COMPANY, LLC 2010-2010→ SANDEL OPERATING COMPANY 2021-2026

Lease Production

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

Gas

production & DCA →

Formation Tops (3) Elevation 290 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
QUEEN CITY	5,845 ft	-5,555 ft
WILCOX	7,300 ft	-7,010 ft
WILCOX 11300 (Wilcox)	11,324 ft	-11,034 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 (7)

Interval	Type
8,388–8,404 ft	Perforated
8,650–8,666 ft	Perforated
8,750–8,766 ft	Perforated
11,324–11,334 ft	Perforated
11,324–11,366 ft	Perforated
11,340–11,346 ft	Perforated
11,356–11,366 ft	Perforated

Casing (6)

Size	Set Depth	Cement
10.75"	1,006 ft	800 sx
7.625"	8,063 ft	475 sx
7.625"	8,063 ft	475 sx
2.375"	8,280 ft	—
2.375"	8,550 ft	—
2.875"	11,454 ft	185 sx

Permit History (3)

#233472 Recompletion Final Completion

GEFFERT GAS UNIT NO. 1 · 12,000 ft

1984-03-23

#110541 Other Final Completion

GEFFERT GAS UNIT · 9,150 ft

1981-03-03

#37146 Drill Final Completion

GEFFERT GAS UNIT · 10,000 ft

1978-11-17

Spud 1978-12-08

Applications (3)

#233472 A SANCHEZ-O'BRIEN OIL & GAS CORP.

received 1984-03-23

#110541 A SANCHEZ-O'BRIEN OIL & GAS CORP.

received 1981-03-03

#37146 A SANCHEZ-O'BRIEN OIL & GAS CORP.

received 1978-11-17

Records & Logs

7 completion filings on record.

W-2/G-1 2021-08-11

W-2/G-1 2008-07-09

W-2/G-1 1987-02-02

W-2/G-1 1984-06-25

W-2/G-1 1981-09-16

+1 more filings

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 LIVE OAK County.

Well Details

Well Number: 1
Max Depth: 12,000 ft
Drill Type: Vertical
County: LIVE OAK
District: 2
Operator: SANCHEZ-O BRIEN OIL & GAS CORP.
Completed: 1979-01-21

Operator

Name: SANCHEZ-O'BRIEN OIL & GAS CORP
Location: HOUSTON
P-5 Status: Inactive (filed 1997-08-14)
Cum Oil (all leases): 264,031 bbl
Cum Gas (all leases): 270,035,085 mcf
Total Permits: 493