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TEXAS · WELLS · STARR COUNTY · API 42-427-05077 · DISTRICT 04

Marrs-McLean #16L

Plugged

Starr County · Lockhart field  · Vertical

Marrs-Mclean #16L (API 42-427-05077) is a plugged well in Starr County, plugged January 23, 2002, last operated by Cooper Operating LLC.

The RRC has issued 3 drilling permits (amended once) between 1979 and 1988, permitted to 4,675 ft.

It was permitted by Sun Expl. & Prod. CO.-Corpus and has since transferred to Cooper Operating LLC on the wellbore schedule.

Completion filings report 5 formation tops, including Lockhart Sand, Cockfield 4, Cockfield Iv, 4400 Yegua.

Its 2 leases have reported 24.7K barrels of oil and 109K mcf of gas since January 1993, last reporting in July 2026. The leases carry 6 wells, so these are lease totals, not this well alone.

Operator of record

Cooper Operating LLC

Permitted by Sun Expl. & Prod. Co.-Corpus; the EWA schedule now lists a different operator.

Watch this operatorWatch Starr County

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleContinental Operating Co.
Production reportsWhite Stride LLCthrough Mar 2026
Latest permitSun Expl. & Prod. Co.-CorpusMar 22, 1988

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

4,675
total depth, ft
4
permits on file
Mar 22, 1988
last permit issued
Apr 30, 1988
completed
24.7K
cumulative oil, bbl
109K
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule
OFF SCHEDULE
Completed
Apr 30, 1988
Shut in
—
Plugged
Jan 23, 2002

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 2 leases this well is completed on; they carry 6 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Marrs-McLean O-4-1514LockhartWhite Stride LLC424.7K109KJan 1993 – Jul 2026
Marrs-McLean O-4-9344Lockhart (Cockfield I)Ceniza Petroleum, Inc.200Jan 1993 – Aug 2003

Gas, mcf lease total

Last 12 months 823 · prior 12 996(-17%)

050100150202420252026

Oil, barrels lease total

Last 12 months 65 · prior 12 74(-12%)

0510202420252026

Chain of custody

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

  1. 1South Texas Limited PartnershipJan 1993 → Feb 1994
  2. 2Washington Energy Expl., Inc.Mar 1994 → Jul 1994
  3. 3Cabot Oil & Gas Production Corp.Aug 1994 → Feb 1996
  4. 4Cabot Oil & Gas CorporationMar 1996 → Jan 1997
  5. 5Ceniza Petroleum, Inc.Feb 1997 → Jun 2002
  6. 6FredcoJul 2002 → Feb 2003
  7. 7White Oak Operating Company LLCMar 2003 → Jun 2004
  8. 8Opex Energy, LLCJul 2004 → Dec 2004
  9. 9Continental Operating Co.Dec 2008 → Nov 2019
  10. 10Maverick Brothers Operating,inc.Dec 2019 → Jun 2025
  11. 11White Stride LLCAug 2025 → Mar 2026

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
344239-98RecompletionSun Expl. & Prod. Co.-CorpusMay 13, 1988Mar 22, 1988—4,675
344239-99RecompletionSun Expl. & Prod. Co.-CorpusMar 22, 1988Mar 22, 1988—4,675
335598-99RecompletionSun Expl. & Prod. Co.-CorpusSep 8, 1987Sep 10, 1987—4,675
49638-99RecompletionSun Expl. & Prod. Co.-HoustonMay 29, 1979May 29, 1979—4,675

Completions

CompletedLeaseFieldOperatorStatusDepth
Apr 30, 1988Marrs-McLean O-4-1514LockhartCooper Operating LLCPlugged—
Dec 1, 1987Marrs-McLean G-4-125957Lockhart (Cockfield 4)Sun Expl. & Prod. Co.-CorpusPlugged—
Aug 8, 1979Marrs-McLean O-4-9329Lockhart (Yegua F Seg 3)Continental Operating Co.Plugged—
Aug 8, 1979Marrs-McLean O-4-9344Lockhart (Cockfield I)Ceniza Petroleum Inc.Plugged—
Aug 1, 1968— G-4-44828Lockhart (Pettus Gas)Sun Exploration & Production Co.Plugged—
—Marrs-McLean O-4-7187Lockhart (4400)Continental Operating Co.Plugged—
—Marrs-McLean O-4-7187Lockhart (4400)Continental Operating Co.Plugged—
—Marrs-McLean G-4-58048Lockhart (3900)Sun Expl. & Prod. Co.-HoustonPlugged—

Formation tops

As filed on W-2/G-1. Subsea from 359 ft elevation.Download CSV →

FormationMD ftSubsea
Lockhart Sand3,744-3,385
Cockfield 43,874-3,515
Cockfield IV3,900-3,541
4400 Yegua4,344-3,985
YeguaYEGUA F, SEG 34,397-4,038
YeguaYEGUA F, SEG. 34,397-4,038

Perforations

Perforated and open-hole intervals.

FromToType
3,5003,505Perforated
3,5543,562Perforated
3,7463,759Perforated
3,8743,881Perforated
4,3974,400Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
10.7518515130 S
2.3753,627——
2.8754,0119.875—
4.54,4849.875450 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. About these reports →

SuffixFiledW-2 / G-1 dateLogs referenced
00Oct 28, 1988May 9, 1988Yes
00Aug 18, 1988——
00Apr 20, 1988Dec 15, 1987Yes
00Feb 4, 1988——
00Jan 12, 1984Aug 28, 1979—
00Jan 12, 1984Aug 16, 1979—
00Jan 12, 1984Apr 8, 1974—
00Jan 12, 1984Aug 14, 1968—
00Jan 12, 1984——

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.

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.

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/42705077, documented in the API reference.