TEXAS · WELLS · CRANE COUNTY · SAND HILLS TUBB UNIT LEASE · API 42-103-33234 · DISTRICT 7B

Sand Hills Tubb Unit #52

Shut in

Crane County · Sand Hills (Tubb) field · Shut In · Vertical

Sand Hills Tubb Unit #52 (API 42-103-33234) is a well in Crane County operated by Formentera Operations LLC, completed October 31, 1983 and listed as shut in on the RRC schedule, shut in September 1, 2022.

The RRC has issued 2 drilling permits between 1983 and 1994, permitted to 4,895 ft.

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

Its lease has reported 2.15M barrels of oil and 4.23M mcf of gas since the record begins in January 1993, last reporting volume in April 2026. The lease carries 80 wells, so these are lease totals, not this well alone.

Operator of record

Formentera Operations LLC

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

Based in: Austin, TX
P-5 status: Active – Extension (X)
P-5 last filed: Jun 11, 2026
Permits on file: 94
Phone: (512) 514-5779

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SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Formentera Operations LLC
Production reports	Formentera Operations LLCthrough Apr 2026
Latest permit	Mobil Producing TX. & N.M. Inc.Oct 14, 1994

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

4,895: total depth, ft
2: permits on file
Oct 14, 1994: last permit issued
Oct 31, 1983: completed
2.15M: cumulative oil, bbl
4.23M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH APR 2026

On this pageLease production

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Oct 31, 1983
Shut in: Sep 1, 2022
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.

Wells nearby

Withinmiles

Every well with a location on file around this well, in any state, nearest first.

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Texas locations come from drilling permits, so most older Texas wells have none and are not listed.

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; they carry 80 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Sand Hills Tubb Unit O-10-20865	Sand Hills (Tubb)	Formentera Operations LLC	80	2.15M	4.23M	by Jan 1993 – Apr 2026

Oil, barrels lease total

Last 12 months 9,631 · prior 12 12,027(-20%)

Gas, mcf lease total

Last 12 months 2,583 · prior 12 21,156(-88%)

Wells named Sand Hills Tubb Unit

Formentera Operations LLC's other wells filed under this lease name in Crane County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.

Loading the lease's wells

Chain of custody

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

1Mobil Producing TX. & N.M. Inc.Jan 1993 → Oct 1996
2Titan Resources I, Inc.Nov 1996 → May 2000
3Pure Resources, L.P.Jun 2000 → Mar 2002
4Home-Stake Oil & Gas CompanyApr 2002 → Jul 2002
5Cortez Operating CompanyAug 2002 → Apr 2004
6Encore Operating, L.P.May 2004 → Aug 2009
7Encore Energy Partners Oper LLCSep 2009 → Mar 2012
8Vanguard Permian, LLCApr 2012 → Apr 2015
9Vanguard Operating, LLCMay 2015 → Aug 2019
10Grizzly OP of Delaware, LLCSep 2019 → Jan 2021
11Contango Resources, Inc.Feb 2021 → Dec 2021
12Contango Resources, LLCJan 2022 → Jun 2022
13Slant Operating, LLCJul 2022 → Oct 2023
14Formentera Operations LLCNov 2023 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
428974-99	Recompletion	Mobil Producing TX. & N.M. Inc.	Oct 11, 1994	Oct 14, 1994	—	4,230
203584-99	Drill	Mobil Producing TX. & N.M. Inc.	Aug 1, 1983	Aug 1, 1983	Sep 20, 1983	5,000

Completions

Completed	Lease	Field	Operator	Status	Depth
Oct 31, 1983	Sand Hills Tubb Unit O-10-20865	Sand Hills (Tubb)	Formentera Operations LLC	Shut In · shut in Sep 1, 2022	4,895

Perforations

Perforated and open-hole intervals.

From	To	Type
4,327	4,647	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
8.625	600	12.25	300 S
2.375	4,511	—	—
5.5	4,895	7.875	550 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 →

Suffix	RRC record date	W-2 / G-1 date	Logs referenced
00	Jan 12, 1984	Nov 22, 1983	—

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 42-103-33234 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-103-33234 → scanned completion filings

Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its search.

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/10333234, documented in the API reference.