WELL · 42-135-41223 · DISTRICT 8
SALLIE11 #21
Ector County · Sallie Ann (Spraberry-Wolfcamp) field · Vertical
Sallie11 #21 (API 42-135-41223) is a plugged well in Ector County, plugged August 4, 2026, last operated by Diamondback E&P LLC.
The RRC has issued one drilling permit, issued June 29, 2011, permitted to 10,800 ft.
It was permitted by Cog Operating LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its lease has reported 1.33M barrels of oil and 4.11M mcf of gas since January 2008, last reporting in July 2026. The lease carries 22 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by COG Operating LLC; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,237
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | COG Operating LLCJun 29, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,800
- total depth, ft
- 1
- permits on file
- Jun 29, 2011
- last permit issued
- Feb 23, 2012
- completed
- 1.33M
- cumulative oil, bbl
- 4.11M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2008 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 23, 2012
- Shut in
- —
- Plugged
- Aug 4, 2026
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 22 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| SALLIE11 O-10-38439 | Sallie Ann (Spraberry-Wolfcamp) | Diamondback E&P LLC | 22 | 1.33M | 4.11M | Jan 2008 – Jul 2026 |
Gas, mcf lease total
Last 12 months 79,597 · prior 12 86,084(-8%)
Oil, barrels lease total
Last 12 months 9,670 · prior 12 11,012(-12%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Henry Petroleum LPJan 2008 → Dec 2008
- 2COG Operating LLCJan 2009 → Aug 2019
- 3Chevron Midcontinent, L.P.Sep 2019 → Jan 2022
- 4Firebird Energy LLCFeb 2022 → Nov 2022
- 5Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 717781-99 | Drill | COG Operating LLC | Jun 6, 2011 | Jun 29, 2011 | Oct 5, 2011 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 23, 2012 | SALLIE11 O-10-38439 | Sallie Ann (Spraberry-Wolfcamp) | Diamondback E&P LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,853 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,120 | 9,980 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 438 | 12.25 | 260 S |
| 5.5 | 10,215 | 7.875 | 565 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 | Apr 25, 2013 | Mar 29, 2012 | Yes |
| 00 | Dec 17, 2012 | Jan 16, 2012 | Yes |
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 42-135-41223 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-41223 → 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.
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/13541223, documented in the API reference.