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TEXAS · WELLS · MIDLAND COUNTY · API 42-329-30341 · DISTRICT 7B

Gatlin Mary #4

Shut in

Midland County · Parks (Consolidated) field · Shut In  · Vertical

Gatlin Mary #4 (API 42-329-30341) is a well in Midland County operated by Cog Operating LLC, completed May 11, 1988 and listed as shut in on the RRC schedule, shut in December 1, 2025.

The RRC has issued 3 drilling permits between 1985 and 1987, permitted to 12,670 ft.

It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Cog Operating LLC on the wellbore schedule.

Completion filings report 4 formation tops, including Wolfcamp, Pennsylvanian, Fusselman, Montoya.

Its 2 leases have reported 388K barrels of oil and 878K mcf of gas since January 1993, last reporting volume in November 2025. The leases carry 8 wells, so these are lease totals, not this well alone.

Operator of record

COG Operating LLC

Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.

Based in
Midland, TX
P-5 status
Active – Extension (X)
P-5 last filed
Jun 2, 2026
Permits on file
4,568
Phone
(432) 683-7443
Watch this operatorWatch Midland County

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleCOG Operating LLC
Production reportsCOG Operating LLCthrough Nov 2025
Latest permitMobil Producing TX. & N.M. Inc.Dec 7, 1987

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

12,670
total depth, ft
3
permits on file
Dec 7, 1987
last permit issued
May 11, 1988
completed
388K
cumulative oil, bbl
878K
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Nov 2025

Regulatory status · RRC wellbore file

Schedule
ON SCHEDULE
Completed
May 11, 1988
Shut in
Dec 1, 2025
Plugged
—

Operator's P-5 on the schedule: Active (A)

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 8 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Gatlin, Mary O-10-39577Parks (Consolidated)COG Operating LLC6307K737KApr 2009 – Nov 2025
Gatlin, Mary O-10-30122Parks (Spraberry)COG Operating LLC281.1K141KJan 1993 – Mar 2009

Oil, barrels lease total

Last 12 months 767 · prior 12 3,578(-79%)

05001K202420252026

Gas, mcf lease total

Last 12 months 221 · prior 12 6,330(-97%)

02K4K202420252026

Chain of custody

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

  1. 1Mobil Producing TX. & N.M. Inc.Jan 1993 → Mar 1998
  2. 2Henry Petroleum Corp.Apr 1998 → Mar 2001
  3. 3Henry Petroleum LPApr 2001 → Dec 2008
  4. 4COG Operating LLCJan 2009 → Nov 2025

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
339441-99RecompletionMobil Producing TX. & N.M. Inc.Nov 30, 1987Dec 7, 1987—10,555
327109-99RecompletionMobil Producing TX. & N.M. Inc.Feb 26, 1987Mar 3, 1987—12,670
277878-99RecompletionMobil Producing TX. & N.M. Inc.Jun 14, 1985Jun 14, 1985—12,800

Completions

CompletedLeaseFieldOperatorStatusDepth
May 11, 1988Gatlin Mary O-10-39577Parks (Consolidated)COG Operating LLCShut In · shut in Dec 1, 202512,670
May 11, 1988Gatlin Mary O-10-30122Parks (Spraberry)COG Operating LLCNot on Schedule—
May 5, 1987Gatlin Mary O-10-28880Parks (Devonian)Mobil Producing TX. & N.M. Inc.Not on Schedule—
May 5, 1987Gatlin Mary O-10-28880Parks (Devonian)Mobil Producing TX. & N.M. Inc.Not on Schedule—
—Gatlin Mary G-10-61982Parks (Devonian)Mobil Producing TX. & N.M. Inc.Not on Schedule—

Formation tops

As filed on W-2/G-1. Subsea from 2,816 ft elevation.Download CSV →

FormationMD ftSubsea
Wolfcamp9,220-6,404
PennsylvanianPENN10,146-7,330
Fusselman12,454-9,638
Montoya12,520-9,704

Perforations

Perforated and open-hole intervals.

FromToType
7,7988,267Perforated
8,3698,711Perforated
11,67911,961Perforated
12,46112,612Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
10.75400——
10.7541415400 S
7.8755,700——
7.6255,700——
7.6255,7029.51,492 S
2.37511,602——

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 →

SuffixRRC record dateW-2 / G-1 dateLogs referenced
00Nov 3, 2009Jun 9, 1988Yes
00Jun 27, 1988Jun 9, 1988Yes
00Jun 18, 1988——
00Dec 31, 1987Dec 3, 1987—
00Feb 24, 1986Jan 21, 1986Yes
00May 18, 1984Apr 17, 1984—
00May 5, 1984Apr 17, 1984—
00Jan 12, 1984May 20, 1975—

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 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

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