TEXAS · WELLS · ANDREWS COUNTY · ULS CDU 4-1 LEASE · API 42-003-42535 · DISTRICT 7B
Uls Cdu 4-1 #1
Andrews County · Spraberry (Trend Area) field · Producing · Vertical
Uls Cdu 4-1 #1 (API 42-003-42535) is a well in Andrews County operated by Sabalo II Operating LLC, completed July 16, 2011 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued January 20, 2011, permitted to 11,398 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Sabalo II Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Clear Fork, Spraberry, Wolfcamp, Strawn.
Its lease has reported 23.1K barrels of oil and 15.6K mcf of gas since June 2011, last reporting volume in April 2026.
Operator of record
Permitted by Devon Energy Production Co, L.P.; the EWA schedule now lists a different operator.
- Based in
- Corpus Chrsti, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 25, 2026
- Permits on file
- 73
- Phone
- (361) 888-7708
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sabalo II Operating LLC |
| Production reports | Sabalo II Operating, LLCthrough Apr 2026 |
| Latest permit | Devon Energy Production Co, L.P.Jan 20, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,398
- total depth, ft
- 1
- permits on file
- Jan 20, 2011
- last permit issued
- Jul 16, 2011
- completed
- 23.1K
- cumulative oil, bbl
- 15.6K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 16, 2011
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Uls Cdu 4-1 O-10-41883 | Spraberry (Trend Area) | Sabalo II Operating, LLC | 1 | 23.1K | 15.6K | Jun 2011 – Apr 2026 |
Oil, barrels lease total
Last 12 months 747 · prior 12 778(-4%)
Gas, mcf lease total
Last 12 months 12 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Jul 2011 → Aug 2016
- 2Pioneer Natural Res. USA, Inc.Sep 2016 → Jan 2017
- 3Zarvona Energy LLCFeb 2017 → Sep 2025
- 4Sabalo II Operating, LLCOct 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 708621-99 | Drill | Devon Energy Production Co, L.P. | Jan 17, 2011 | Jan 20, 2011 | Feb 6, 2011 | 11,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 16, 2011 | Uls Cdu 4-1 O-10-41883 | Spraberry (Trend Area) | Sabalo II Operating LLC | Producing | 11,398 |
Formation tops
As filed on W-2/G-1. Subsea from 3,098 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear Fork | 8,262 | -5,164 |
| Spraberry | 8,952 | -5,854 |
| Wolfcamp | 10,027 | -6,929 |
| Strawn | 11,050 | -7,952 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,262 | 11,112 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 353 | 17.5 | 280 S |
| 8.625 | 4,800 | 11 | 1,300 S |
| 5.5 | 11,398 | 7.875 | 990 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 | Oct 22, 2012 | Sep 13, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Nov 13, 2012. Resistivity. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans Clear Fork, Spraberry, Wolfcamp, Strawn | TIFF | 6,000 to 11,383 | Nov 13, 2012run Apr 6, 2011 | 3.86 |
"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 42-003-42535 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-42535 → 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/00342535, documented in the API reference.