Petrora

TEXAS · WELLS · CRANE COUNTY · SAND HILLS TUBB UNIT LEASE · API 42-103-33236 · DISTRICT 7B

Sand Hills Tubb Unit #55

Y

Crane County · Sand Hills (Tubb) field · Injection  · Vertical

Sand Hills Tubb Unit #55 (API 42-103-33236) is a well in Crane County operated by Formentera Operations LLC, completed January 29, 1999 and listed as injection on the RRC schedule.

The RRC has issued one drilling permit, issued August 1, 1983, permitted to 4,900 ft.

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

Completion filings report 3 formation tops, including McKnight, San Angelo, Tubb.

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

It holds an active disposal or injection permit, with 233K barrels injected in the 12 months reported through June 2025.

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
93
Phone
(512) 514-5779
Create operator alert

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleFormentera Operations LLC
Production reportsFormentera Operations LLCthrough Apr 2026
Latest permitMobil Producing TX. & N.M. Inc.Aug 1, 1983

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

4,900
total depth, ft
1
permits on file
Aug 1, 1983
last permit issued
Jan 29, 1999
completed
2.15M
cumulative oil, bbl
4.23M
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule
ON SCHEDULE
Completed
Jan 29, 1999
Shut in
—
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 lease this well is completed on; they carry 80 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Sand Hills Tubb Unit O-10-20865Sand Hills (Tubb)Formentera Operations LLC802.15M4.23MJan 1993 – Apr 2026

Oil, barrels lease total

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

01K2K3K202420252026

Gas, mcf lease total

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

01K2K3K202420252026

Chain of custody

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

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

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
203586-99DrillMobil Producing TX. & N.M. Inc.Aug 1, 1983Aug 1, 1983—5,000

Completions

CompletedLeaseFieldOperatorStatusDepth
Jan 29, 1999Sand Hills Tubb Unit O-10-20865Sand Hills (Tubb)Formentera Operations LLCInjection4,900
Dec 22, 1983Sand Hills Tubb Unit O-10-20865Sand Hills (Tubb)Formentera Operations LLCNot on Schedule—

Formation tops

As filed on W-2/G-1. Subsea from 2,618 ft elevation.Download CSV →

FormationMD ftSubsea
McKnight3,182-564
San Angelo3,481-863
Tubb4,293-1,675

Perforations

Perforated and open-hole intervals.

FromToType
4,3514,506Perforated
4,6494,727Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
8.62560012.25300 S
5.54,9007.8751,405 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 →

SuffixRRC record dateW-2 / G-1 dateLogs referenced
00Jan 2, 2003Mar 11, 2002—
00Nov 19, 2002Jan 17, 1984—
00Feb 13, 1984Jan 17, 1984—
00Feb 9, 1984Jan 17, 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 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 →

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

233K
bbl, last 12 reported months
1.86M
bbl, all reported
Jun 2025
reported through
UICKindStatusPermitted bbl/dMax psiZone ft
000088515H-1 InjectionActive5001,5004,300–4,780

MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS

Last 12 months 232,810 · prior 12 125,003(+86%)

010K20K30K20242025

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/10333236, documented in the API reference.