42-479-34142

Final Completion DirectionalSidetrack

ALLEY

WEBB County · District 4 · COX OIL & GAS INC. · RANCHO VIEJO (LOBO 6)

Permits

Max Depth

11,000 ft

First Permit

1985-04-23

Latest Activity

1999-06-18

Lifespan

14 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1985-06-08

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: COX OIL & GAS INC. ≠ Production: HILCORP ENERGY COMPANY (reported 2026-04)

EWA / Permit operator mismatch

Scheduling: COX OIL & GAS INC. ≠ Permit: EEX CORPORATION

Resolved via: production → HILCORP ENERGY COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

EP OPERATING LIMITED PARTNERSHIP 1993-1995→ ENSERCH EXPLORATION, INC 1995-1998→ EEX CORPORATION 1998-2000→ EEX OPERATING, L.P. 2000-2003→ NEWFIELD EXPLORATION COMPANY 2003-2016→ HILCORP ENERGY COMPANY 2016-2026

Lease Production

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

Formation Tops (5) Elevation 666 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
TOP WILCOX (Wilcox)	5,972 ft	-5,306 ft
L. WILCOX	7,660 ft	-6,994 ft
LOBO 6	10,108 ft	-9,442 ft
LOBO 6	10,220 ft	-9,554 ft
LOBO 6C	10,292 ft	-9,626 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 (5)

Interval	Type
9,650–9,678 ft	Perforated
10,158–10,175 ft	Perforated
10,267–10,283 ft	Perforated
10,285–10,300 ft	Perforated
10,298–10,319 ft	Perforated

Casing (3)

Size	Set Depth	Cement
10.75"	1,128 ft	640 sx
7.625"	8,013 ft	550 sx
2.875"	10,882 ft	245 sx

Permit History (4)

#485325 Recompletion Final Completion

ALLEY · 10,571 ft

1999-06-18

Spud 2000-09-21

#377000 Recompletion Final Completion

ALLEY · 10,660 ft

1990-08-29

#377000 Recompletion

ALLEY · 10,660 ft

1990-08-29

#273163 Drill Final Completion

ALLEY · 11,000 ft

1985-04-23

Spud 1985-05-01

Applications (4)

#485325 A EEX CORPORATION

received 1999-06-18

#377000 A COX OIL & GAS, INC.

received 1990-09-19

#377000 A COX OIL & GAS, INC.

received 1990-08-23

#273163 A COX, EDWIN L. & COX, BERRY R.

received 1985-04-22

Records & Logs

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

W-2/G-1 2000-11-07

W-2/G-1 1990-08-23 log on file

W-2/G-1 1990-11-09

W-2/G-1 1985-06-20

W-2/G-1 1985-07-02

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 WEBB County.

Well Details

Well Number: 8ST
Max Depth: 11,000 ft
Drill Type: Directional, Sidetrack
County: WEBB
District: 4
Operator: COX OIL & GAS INC.
Completed: 1985-06-08

Operator

Name: COX OIL & GAS, INC
Location: DALLAS
P-5 Status: Inactive (filed 1991-04-01)
Total Permits: 71