WELL · 42-103-35000 · DISTRICT 8
Sand Hills Tubb Unit #81
Crane County · Sand Hills (Tubb) field · Vertical
Sand Hills Tubb Unit #81 (API 42-103-35000) is a well in Crane County operated by Formentera Operations LLC, completed July 20, 2004.
The RRC has issued 2 drilling permits between 2004 and 2022, permitted to 5,200 ft.
It was permitted by Slant Operating, LLC and has since transferred to Formentera Operations LLC on the wellbore schedule.
Completion filings report 4 formation tops, including McKnight, Clear Fork, Tubb, Wichita-Albany.
Its 2 leases have reported 2.23M barrels of oil and 5.08M mcf of gas since January 1993, last reporting in July 2026. The leases carry 86 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Slant Operating, LLC; the EWA schedule now lists a different operator.
Austin, TX · P-5 Y, filed May 4, 2026 · 90 permits on file · (844) 509-5768
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Formentera Operations LLC |
| Production reports | Formentera Operations LLCthrough Apr 2026 |
| Latest permit | Slant Operating, LLCNov 21, 2022 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,200
- total depth, ft
- 2
- permits on file
- Nov 21, 2022
- last permit issued
- Jul 20, 2004
- completed
- 2.23M
- cumulative oil, bbl
- 5.08M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 20, 2004
- Shut in
- —
- Plugged
- —
Surface location
31.498296, -102.589650
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Crane County.
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 86 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 | Jan 1993 – Jul 2026 |
| Lea, P. J. a/C 2 O-10-26526 | Sand Hills (McKnight) | Formentera Operations LLC | 6 | 80.4K | 849K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 21,909 · prior 12 26,989(-19%)
Gas, mcf lease total
Last 12 months 57,758 · prior 12 135,130(-57%)
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 |
|---|---|---|---|---|---|---|
| 885788-99 | Recompletion | Slant Operating, LLC | Nov 16, 2022 | Nov 21, 2022 | — | 4,978 |
| 544578-99 | Drill | Encore Operating, L.P. | Apr 16, 2004 | Apr 20, 2004 | Jun 29, 2004 | 5,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-20865 | — | — | — | — |
| — | — O-10-26526 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,629 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| McKnight | 3,170 | -541 |
| Clear Fork | 4,050 | -1,421 |
| Tubb | 4,400 | -1,771 |
| Wichita-Albany | 4,900 | -2,271 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,176 | 3,362 | Perforated |
| 4,635 | 4,774 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 707 | 12.25 | 425 S |
| 5.5 | 4,949 | 7.875 | 1,460 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Mar 31, 2023 | Mar 9, 2023 | — |
| 00 | Dec 7, 2004 | Aug 26, 2004 | Yes |
| 00 | Oct 8, 2004 | — | — |
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 42-103-35000 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-103-35000 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their search.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Sand Hills Tubb Unit42-103-34281
0.2 KM · Slant Operating, LLC · Section with this well →
| Grayburg | 2,482 | 153 |
| Judkins | 2,745 | -110 |
| San Angelo | 3,495 | -860 |
| Tubb | 4,290 | -1,655 |
| Wichita-Albany | 4,758 | -2,123 |
Sand Hills Tubb Unit42-103-34335
0.2 KM · Slant Operating, LLC · Section with this well →
| Queen | 2,240 | 383 |
| McElroy | 2,354 | 269 |
| San Andres | 2,675 | -52 |
| Judkins | 2,730 | -107 |
| McKnight | 3,130 | -507 |
| San Angelo | 3,500 | -877 |
| Clear Fork | 3,870 | -1,247 |
| Clear Fork | 3,870 | -1,247 |
9 TOPS · FIRST 8
Sand Hill Tubb Unit42-103-35006
0.4 KM · Slant Operating, LLC · Section with this well →
| Yates | 1,600 | 1,016 |
| Judkins | 2,850 | -234 |
| San Angelo | 3,500 | -884 |
| Clear Fork | 3,950 | -1,334 |
| Clear Fork | 4,050 | -1,434 |
| Tubb | 4,240 | -1,624 |
| Wichita-Albany | 4,900 | -2,284 |
Waddell TR B42-103-37056
0.6 KM · Blackbeard Operating, LLC · Section with this well →
| Rustler | 468 | 2,165 |
| Seven Rivers | 1,685 | 948 |
| Queen | 2,194 | 439 |
| Grayburg | 2,448 | 185 |
| San Andres | 2,631 | 2 |
| San Angelo | 3,484 | -851 |
| Clear Fork | 3,884 | -1,251 |
| Permian (undifferentiated) | — |
10 TOPS · FIRST 8
ES Vedra42-103-37725
0.6 KM · Blackbeard Operating, LLC · Section with this well →
| Rustler | 472 | 2,160 |
| Yates | 1,476 | 1,156 |
| Seven Rivers | 1,689 | 943 |
| Queen | 2,200 | 432 |
| Grayburg | 2,459 | 173 |
| San Andres | 2,641 | -9 |
| Glorieta | 3,387 | -755 |
| San Angelo | 3,387 | -755 |
10 TOPS · FIRST 8
ES Vedra42-103-37693
0.6 KM · Blackbeard Operating, LLC · Section with this well →
| Rustler | 471 | 2,161 |
| Yates | 1,479 | 1,153 |
| Seven Rivers | 1,688 | 944 |
| Queen | 2,200 | 432 |
| Grayburg | 2,457 | 175 |
| San Andres | 2,636 | -4 |
| Judkins | 2,847 | -215 |
| McKnight | 3,142 | -510 |
10 TOPS · FIRST 8
Waddell TR B42-103-36933
0.6 KM · Blackbeard Operating, LLC · Section with this well →
| Rustler | 498 | 2,143 |
| Yates | 1,533 | 1,108 |
| Seven Rivers | 1,714 | 927 |
| Queen | 1,969 | 672 |
| Grayburg | 2,488 | 153 |
| San Andres | 2,663 | -22 |
| McKnight | 3,166 | -525 |
| Glorieta | 3,487 | -846 |
10 TOPS · FIRST 8
ES Vedra42-103-37694
0.6 KM · Blackbeard Operating, LLC · Section with this well →
| Rustler | 473 | 2,159 |
| Yates | 1,479 | 1,153 |
| Seven Rivers | 1,684 | 948 |
| Queen | 2,200 | 432 |
| Grayburg | 2,454 | 178 |
| San Andres | 2,636 | -4 |
| Permian (undifferentiated) | — | |
| San Angelo | — |
10 TOPS · FIRST 8
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/10335000, documented in the API reference.