42-033-30387

Final Completion

JO-MILL UNIT

BORDEN County · District 8 · JO MILL OIL COMPANY LLC · JO-MILL (SPRABERRY)

Permits

Max Depth

7,786 ft

First Permit

1977-06-10

Latest Activity

1985-08-27

Lifespan

8 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1977-11-02

Shut-In

—

Plugged

—

EWA / Permit operator mismatch

Scheduling: JO MILL OIL COMPANY LLC ≠ Permit: TEXACO INC.

Resolved via: production → JO MILL OIL COMPANY LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

TEXACO E & P INC. 1993-2002→ CHEVRON U. S. A. INC. 2002-2020→ JO MILL OIL COMPANY LLC 2020-2026

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 (4) Elevation 2,613 ft (DF)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SANTA ROSA	628 ft	+1,985 ft
SPRABERRY ZONE 1 (Spraberry)	7,048 ft	-4,435 ft
SPRABERRY ZONE 2 (Spraberry)	7,083 ft	-4,470 ft
SPRABERRY ZONE 3 (Spraberry)	7,154 ft	-4,541 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 (1)

Interval	Type
628–958 ft	Perforated

Casing (6)

Size	Set Depth	Cement
11.75"	370 ft	200 sx
11.75"	370 ft	250 sx
8.625"	3,287 ft	1,400 sx
8.625"	3,287 ft	1,400 sx
5.5"	7,300 ft	2,700 sx
5.5"	7,300 ft	2,700 sx

Permit History (2)

#283830 Recompletion Final Completion

JO MILL UNIT · 7,300 ft

1985-08-27

#474 Drill

JO MILL UNIT · 7,786 ft

1977-06-10

Spud 1977-10-06

Applications (2)

#283830 A TEXACO INC.

received 1985-08-26

#474 A TEXACO INC.

received 1977-06-10

Records & Logs

4 completion filings on record.

W-2/G-1 2003-04-10

W-2/G-1 1986-04-24

W-2/G-1 1978-02-22

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 BORDEN County.

Well Details

Well Number: 3521
Max Depth: 7,786 ft
Drill Type: Vertical
County: BORDEN
District: 8
Operator: JO MILL OIL COMPANY LLC
Completed: 1977-11-02

Operator

Name: JO MILL OIL COMPANY LLC
Location: FORT WORTH
P-5 Status: Active (filed 2025-07-09)
Cum Oil (all leases): 4,349,903 bbl
Cum Gas (all leases): — mcf
Activities: OPRS/O