TEXAS · WELLS · CRANE COUNTY · SAND HILLS TUBB UNIT LEASE · API 42-103-35005 · DISTRICT 7B
Sand Hills Tubb Unit #87
Crane County · Sand Hills (Tubb) field · Shut In · Vertical
Sand Hills Tubb Unit #87 (API 42-103-35005) is a well in Crane County operated by Formentera Operations LLC, completed July 22, 2004 and listed as shut in on the RRC schedule, shut in September 1, 2020.
The RRC has issued one drilling permit, issued April 26, 2004, permitted to 5,000 ft.
It was permitted by Encore Operating, L.P. and has since transferred to Formentera Operations LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Clear Fork, Tubb, Wichita-Albany.
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
Permitted by Encore Operating, L.P.; 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
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Formentera Operations LLC |
| Production reports | Formentera Operations LLCthrough Apr 2026 |
| Latest permit | Encore Operating, L.P.Apr 26, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,000
- total depth, ft
- 1
- permits on file
- Apr 26, 2004
- last permit issued
- Jul 22, 2004
- 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
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 22, 2004
- Shut in
- Sep 1, 2020
- 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
Every well with a location on file around this well, in any state, nearest first.
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 wellsChain 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 |
|---|---|---|---|---|---|---|
| 544847-99 | Drill | Encore Operating, L.P. | Apr 22, 2004 | Apr 26, 2004 | Jun 13, 2004 | 5,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 22, 2004 | Sand Hills Tubb Unit O-10-20865 | Sand Hills (Tubb) | Formentera Operations LLC | Shut In · shut in Sep 1, 2020 | 5,000 |
Formation tops
As filed on W-2/G-1. Subsea from 2,606 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear Fork | 4,050 | -1,444 |
| Tubb | 4,400 | -1,794 |
| Wichita-Albany | 4,900 | -2,294 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,264 | 4,442 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 731 | 12.25 | 425 S |
| 5.5 | 4,999 | 7.875 | 134 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 | Dec 13, 2004 | Aug 11, 2004 | Yes |
| 00 | Oct 5, 2004 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Jan 28, 2008. Density, Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| Neutron/Density PorosityCOMPENSATED NEUTRON THREEDETECTOR LITHODENSITYSpans Clear Fork, Tubb, Wichita-Albany | TIFF | 652 to 4,994 | Jan 28, 2008run Jun 27, 2004 | — |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-103-35005 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-103-35005 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/10335005, documented in the API reference.