TEXAS · WELLS · MIDLAND COUNTY · SHACKELFORD "34" LEASE · API 42-329-33826 · DISTRICT 7B
Shackelford 34 #1
Midland County · Azalea (Devonian) field · Horizontal
Shackelford 34 #1 (API 42-329-33826) is a plugged horizontal well in Midland County, plugged June 4, 2024, last operated by Cog Operating LLC.
The RRC has issued one drilling permit, issued July 24, 1997, permitted to 12,000 ft.
It was permitted by Collins & Ware, Inc. and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Wolfcamp, Lwr. Wlfcmp Shale, Pennsylvanian, Strawn.
Operator of record
Permitted by Collins & Ware, Inc.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 4,568
- Phone
- (432) 683-7443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | COG Operating LLC |
| Production reports | COG Operating LLCthrough May 2020 |
| Latest permit | Collins & Ware, Inc.Jul 24, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Jul 24, 1997
- last permit issued
- Feb 9, 1998
- completed
- 0
- cumulative oil, bbl
- 572K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 1998 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 9, 1998
- Shut in
- —
- Plugged
- Jun 4, 2024
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 |
|---|---|---|---|---|---|---|
| Shackelford "34" G-10-168257 | Azalea (Devonian) | COG Operating LLC | 1 | 0 | 572K | Feb 1998 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Collins & Ware, Inc.Feb 1998 → May 2000
- 2Ricks Exploration, Inc.Jun 2000 → Dec 2003
- 3Concho Exploration IncJan 2004 → Mar 2004
- 4Chesapeake Operating, Inc.Apr 2004 → Mar 2010
- 5Three Rivers Operating Co LLCApr 2010 → Jul 2012
- 6COG Operating LLCAug 2012 → May 2020
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 465352-99 | Drill | Collins & Ware, Inc. | Jul 24, 1997 | Jul 24, 1997 | Aug 14, 1997 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 9, 1998 | Shackelford 34 G-10-168257 | Azalea (Devonian) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,623 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| WolfcampLOWER WOLFCAMP SHALE | 9,704 | -7,081 |
| Lwr. Wlfcmp Shale | 9,704 | -7,081 |
| PennsylvanianTOP PENNSYLVANIAN | 10,067 | -7,444 |
| Strawn | 10,346 | -7,723 |
| Atoka | 10,524 | -7,901 |
| MississippianLOWER MISSISSIPPIAN | 11,167 | -8,544 |
| Lwr. Miss. | 11,167 | -8,544 |
| Woodford | 11,202 | -8,579 |
| Dev. | 11,296 | -8,673 |
| Devonian | 11,296 | -8,673 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,539 | 16,669 | Open hole |
| 12,982 | 16,000 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 430 | 17.5 | 460 S |
| 9.625 | 8,787 | 12.25 | 3,290 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 | Aug 28, 1998 | Jul 3, 1998 | — |
| 00 | Jun 29, 1998 | Apr 2, 1998 | Yes |
| 00 | Jun 8, 1998 | — | — |
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 42-329-33826 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-33826 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/32933826, documented in the API reference.