42-089-31653

HARFST

COLORADO County · District 3 · PETRA OLEUM CORP.

Permits

Max Depth

4,500 ft

First Permit

1986-02-19

Latest Activity

1999-11-02

Lifespan

14 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2005-04

Operator History

Chain of Custody

PG&E RESOURCES COMPANY 1993-1994→ MIDPAR L.P. 1994-1995→ PARKER & PARSLEY DEVELOPMENT L.P 1995-1996→ COSTILLA PETROLEUM CORPORATION 1996-1997→ COSTILLA ENERGY, INC. 1997-1999→ PETRA OLEUM CORP. 1999-1999

Lease Production

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

Formation Tops (2) Elevation 142 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
MIOCENE (Miocene (undifferentiated))	2,450 ft	-2,308 ft
FRIO	3,460 ft	-3,318 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 (2)

Interval	Type
3,730–3,733 ft	Perforated
4,180–4,183 ft	Perforated

Casing (2)

Size	Set Depth	Cement
8.625"	316 ft	210 sx
2.875"	4,401 ft	736 sx

Permit History (3)

#489030 Recompletion

HARFST · 3,700 ft

1999-11-02

#435108 Recompletion Final Completion

HARFST · 3,830 ft

1995-04-24

Spud 1995-03-23

#298054 Drill Final Completion

HARFST, G. H. · 4,500 ft

1986-02-19

Applications (3)

#489030 A PETRA OLEUM CORP.

received 1999-11-01

#435108 A PARKER & PARSLEY DEVELOPMENT L.P

received 1995-04-21

#298054 A GEODOMINION PETROLEUM

received 1986-02-18

Records & Logs

4 completion filings on record · 2 with log images at RRC.

W-2/G-1 1995-05-09 log on file

W-2/G-1 1995-05-15

W-2/G-1 1986-03-18 log on file

W-2/G-1 1986-03-26

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 COLORADO County.

Well Details

Well Number: 1
Max Depth: 4,500 ft
Drill Type: Vertical
County: COLORADO
District: 3
Operator: PETRA OLEUM CORP.

Operator

Name: PETRA OLEUM CORP
Location: MIDLAND
P-5 Status: Active (filed 2026-04-09)
Cum Oil (all leases): 1,275,716 bbl
Cum Gas (all leases): 5,512,506 mcf
Activities: CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
Total Permits: 55