Petrora

LEASES · O-10-20865 · OIL · DISTRICT 08

Sand Hills Tubb Unit

Reporting

Formentera Operations LLC · Crane County · Sand Hills (Tubb) field

Sand Hills Tubb Unit is an RRC oil lease (O-10-20865) in Crane County operated by Formentera Operations LLC, with 80 wells completed on it.

It has reported 2.15M barrels of oil and 4.23M mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).

The last 12 reported months total 9.63K barrels of oil, down 20% on the year before; the lease peaked at 14.6K barrels in October 2004.

14 operators have filed production on it, most recently Formentera Operations LLC since November 2023.

2.15M
bbl oil, all reported
4.23M
mcf gas incl. casinghead
9.63K
bbl oil, last 12 reported
-20%
vs the 12 before
80
wells completed on it
14.6K
peak month, bbl (Oct 2004)

PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME APR 2026 · STATEWIDE DATA THROUGH APR 2026

Oil by month

Barrels reported on Form PR for the whole lease. The latest months are revised upward as late reports arrive.

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

02K4K2017201820192020202120222023202420252026

Gas by month

Gas-well gas plus casinghead gas, mcf. On an oil lease all gas is reported as casinghead. The latest months are revised upward as late reports arrive.

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

05K10K15K2017201820192020202120222023202420252026

Decline curve
None shown. Petrora fits an Arps curve only when the last ten years of oil reports follow one decline closely enough to project (R² of 0.7 or better over at least a year since the peak). This lease's recent history does not, so a projection would be a guess dressed as a number.

Who reported it

Each run of months one operator filed the production report, oldest first.

  1. Mobil Producing TX. & N.M. Inc.Jan 1993 → Oct 1996 · 46 mo
  2. Titan Resources I, Inc.Nov 1996 → May 2000 · 43 mo
  3. Pure Resources, L.P.Jun 2000 → Mar 2002 · 22 mo
  4. Home-Stake Oil & Gas CompanyApr 2002 → Jul 2002 · 4 mo
  5. Cortez Operating CompanyAug 2002 → Apr 2004 · 21 mo
  6. Encore Operating, L.P.May 2004 → Aug 2009 · 64 mo
  7. Encore Energy Partners Oper LLCSep 2009 → Mar 2012 · 31 mo
  8. Vanguard Permian, LLCApr 2012 → Apr 2015 · 37 mo
  9. Vanguard Operating, LLCMay 2015 → Aug 2019 · 52 mo
  10. Grizzly OP of Delaware, LLCSep 2019 → Jan 2021 · 17 mo
  11. Contango Resources, Inc.Feb 2021 → Dec 2021 · 11 mo
  12. Contango Resources, LLCJan 2022 → Jun 2022 · 6 mo
  13. Slant Operating, LLCJul 2022 → Oct 2023 · 16 mo
  14. Formentera Operations LLCNov 2023 → Jul 2026 · 33 mo

Wells on the lease

FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL

80

wells completed on the lease

NO Type on File
34
Shut IN
26
Plugged
10
Producing
6
Injection
4

Operates them now

Formentera Operations LLC
79
Mobil Producing TX. & N.M. Inc.
1

Newest permits

All 80 wells, searchable →

About this data

Monthly oil, gas, and casinghead from the RRC PDQ production dump, which lags the reporting month by two to three months; figures shown through Apr 2026. Wells from completion reports; operator runs from who filed each month's report.

Developers: this page as JSON is GET /v1/data/leases/tx/o-10-20865, documented in the API reference.