42-211-31254

Final Completion

FILLINGIM

HEMPHILL County · District 10 · ZEPHYR LONE STAR OPER CO. L.L.C. · BUFFALO WALLOW (MORROW)

Permits

Max Depth

22,500 ft

First Permit

1980-08-05

Latest Activity

1995-09-13

Lifespan

15 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1995-10-10

Shut-In

—

Plugged

2023-04-11

EWA / Permit operator mismatch

Scheduling: ZEPHYR LONE STAR OPER CO. L.L.C. ≠ Permit: UNION OIL COMPANY OF CALIFORNIA

Resolved via: scheduling → ZEPHYR LONE STAR OPER CO. L.L.C.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2023-04

Operator History

Chain of Custody

PEGASUS ENERGY 1996-1997→ ZEPHYR LONE STAR OPER CO.,L.L.C. 1997-2013

Lease Production

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

Formation Tops (6) Elevation 2,529 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
HEEBNER	7,950 ft	-5,421 ft
DOUGLAS	8,055 ft	-5,526 ft
TONKAWA	8,754 ft	-6,225 ft
CLEVELAND	10,122 ft	-7,593 ft
GRANITE WASH	11,060 ft	-8,531 ft
MORROW	13,310 ft	-10,781 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
13,480–13,500 ft	Perforated

Casing (8)

Size	Set Depth	Cement
13.375"	3,010 ft	3,200 sx
13.375"	3,010 ft	3,600 sx
9.625"	13,355 ft	1,300 sx
9.155"	13,355 ft	3,600 sx
9.625"	13,385 ft	1,200 sx
2.875"	16,750 ft	—
7.625"	16,800 ft	450 sx
5.5"	19,470 ft	—

Permit History (3)

#438044 Recompletion Final Completion

FILLINGIM · 15,000 ft

1995-09-13

Spud 1995-09-25

#132767 Drill Final Completion

FILLINGIM · 22,500 ft

1981-01-05

Spud 1980-08-12

#88693 Drill Final Completion

FILLINGIM · 22,500 ft

1980-08-05

Spud 1980-08-17

Applications (3)

#438044 A UNION OIL COMPANY OF CALIFORNIA

received 1995-07-20

#132767 A HOOVER & BRACKEN ENERGIES, INC.

received 1981-01-05

#88693 A HOOVER & BRACKEN ENERGIES, INC.

received 1980-08-05

Records & Logs

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

W-2/G-1 1995-12-18 log on file

W-2/G-1 1996-08-29

W-2/G-1 1982-02-17

W-2/G-1 1981-09-04

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 HEMPHILL County.

Well Details

Well Number: 1020
Max Depth: 22,500 ft
Drill Type: Vertical
County: HEMPHILL
District: 10
Operator: ZEPHYR LONE STAR OPER CO. L.L.C.
Completed: 1995-10-10

Operator

Name: ZEPHYR LONE STAR OPER CO.,L.L.C
Location: OKLAHOMA CI, TY
P-5 Status: Active (filed 2026-02-02)
Cum Oil (all leases): 14,260 bbl
Cum Gas (all leases): 21,271,953 mcf
Activities: OPRS/G
Total Permits: 30