42-505-33283

Directional

MARSHALL, S. G.

ZAPATA County · District 4 · CHEVRON U. S. A. INC.

Permits

Max Depth

12,800 ft

First Permit

1995-02-13

Latest Activity

2001-03-28

Lifespan

6 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1995-04

Last Production

2008-03

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 (4) Elevation 447 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LOBO UNCONFORMITY	9,945 ft	-9,498 ft
LOBO 1	10,110 ft	-9,663 ft
LOBO 6	10,830 ft	-10,383 ft
LOBO 6	10,880 ft	-10,433 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
10,115–10,131 ft	Perforated
10,144–10,160 ft	Perforated
10,164–10,180 ft	Perforated
10,836–10,889 ft	Perforated
10,886–10,889 ft	Perforated
10,932–10,937 ft	Perforated
10,972–10,975 ft	Perforated

Casing (3)

Size	Set Depth	Cement
9.625"	1,025 ft	250 sx
7"	8,211 ft	1,005 sx
4.5"	11,504 ft	350 sx

Permit History (2)

#507061 Recompletion

MARSHALL, S. G. · 10,100 ft

2001-03-28

#432803 Drill Final Completion

MARSHALL S. G. · 12,800 ft

1995-02-13

Spud 1995-03-01

Applications (2)

#507061 A CHEVRON U. S. A. INC.

received 2001-03-27

#432803 A CHEVRON U. S. A. INC.

received 1995-02-13

Records & Logs

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

W-2/G-1 1995-05-26

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

W-2/G-1 1995-06-15

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 ZAPATA County.

Well Details

Well Number: 18
Max Depth: 12,800 ft
Drill Type: Directional
County: ZAPATA
District: 4
Operator: CHEVRON U. S. A. INC.

Operator

Name: TEXACO E & P INC
Location: MIDLAND
P-5 Status: Active (filed 2026-01-30)
Cum Oil (all leases): 633,048,621 bbl
Cum Gas (all leases): 4,264,158,043 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits: 9,261