TEXAS · WELLS · ZAPATA COUNTY · MARSHALL S. G. LEASE · API 42-505-33283 · DISTRICT 04

Marshall S. G. #18

Plugged

Zapata County · Cisco-Benavides (Lobo Cons.) field · Directional

Permitted field: Los Mogotes (7400); The district's wildcat field is also on the permit.

Marshall S. G. #18 (API 42-505-33283) is a plugged well in Zapata County, plugged March 20, 2008, last operated by Chevron U. S. A. Inc..

The RRC has issued 2 drilling permits between 1995 and 2001, permitted to 12,800 ft.

Completion filings report 3 formation tops, including Lobo Unconformity, Lobo 1, Lobo 6.

Its lease has reported 24 barrels of oil and 424K mcf of gas since April 1995, with no volume in the three years through April 2026.

Operator of record

Chevron U. S. A. Inc.

Based in: Midland, TX
P-5 status: Active (A)
P-5 last filed: Jan 30, 2026
Permits on file: 9,294
Phone: (866) 212-1212

Create operator alert

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Chevron U. S. A. Inc.
Production reports	Chevron U. S. A. Inc.through Aug 2005
Latest permit	Chevron U. S. A. Inc.Mar 28, 2001

12,800: total depth, ft
2: permits on file
Mar 28, 2001: last permit issued
May 8, 1995: completed
24: cumulative oil, bbl
424K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Apr 1995 THROUGH Aug 2005

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: May 8, 1995
Shut in: —
Plugged: Mar 20, 2008

Surface location

No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.

Lease production

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Marshall S. G. G-4-154272	Cisco-Benavides (Lobo Cons.)	Chevron U. S. A. Inc.	1	24	424K	Apr 1995 – Aug 2005

No volumes reported on these leases in the last three years.

Chain of custody

Every operator that reported production on this well's lease, in order.

1Chevron U. S. A. Inc.Apr 1995 → Aug 2005

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
507061-99	Recompletion	Chevron U. S. A. Inc.	Mar 27, 2001	Mar 28, 2001	—	10,100
432803-99	Drill	Chevron U. S. A. Inc.	Feb 13, 1995	Feb 13, 1995	Mar 1, 1995	12,800

Completions

Completed	Lease	Field	Operator	Status	Depth
May 8, 1995	Marshall S. G. G-4-154272	Cisco-Benavides (Lobo Cons.)	Chevron U. S. A. Inc.	Plugged	—

Formation tops

As filed on W-2/G-1. Subsea from 447 ft elevation.Download CSV →

Formation	MD ft	Subsea
Lobo Unconformity	9,945	-9,498
Lobo 1	10,110	-9,663
Lobo 6	10,830	-10,383
Lobo 6	10,880	-10,433

Perforations

Perforated and open-hole intervals.

From	To	Type
10,115	10,131	Perforated
10,144	10,160	Perforated
10,164	10,180	Perforated
10,836	10,889	Perforated
10,886	10,889	Perforated
10,932	10,937	Perforated
10,972	10,975	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	1,025	12.25	250 S
7	8,211	8.75	1,005 S
4.5	11,504	6.125	350 S

Completion filings

W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →

RRC record date	W-2 / G-1 date	Logs referenced
Oct 5, 1995	May 26, 1995	—
Sep 28, 1995	May 5, 1995	Yes
Jun 15, 1995	—	—

The source documents

Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.

Wellbore filings for 42-505-33283 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-505-33283 → scanned completion filings

Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.

Find logs withinmiles of this well:List →Map →

About this data

Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.

New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease

Developers: this page as JSON is GET /v1/data/wells/50533283, documented in the API reference.