TEXAS · WELLS · DAWSON COUNTY · COTHAM 21 LEASE · API 42-115-33551 · DISTRICT 7B
Cotham 21 #1
Dawson County · Spraberry (Trend Area) field · Producing · Vertical
Cotham 21 #1 (API 42-115-33551) is a well in Dawson County operated by Diamondback E&P LLC, completed February 27, 2013 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 19, 2012, permitted to 11,289 ft.
It was permitted by Element Petro Operating II, LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Spraberry, Wolfcamp, Cline, Strawn.
Its lease has reported 30.3K barrels of oil and 9.99K mcf of gas since February 2013, last reporting in July 2026.
Operator of record
Permitted by Element Petro Operating II, 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 | Element Petro Operating II, LLCNov 19, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,289
- total depth, ft
- 1
- permits on file
- Nov 19, 2012
- last permit issued
- Feb 27, 2013
- completed
- 30.3K
- cumulative oil, bbl
- 9.99K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2013 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 27, 2013
- 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 |
|---|---|---|---|---|---|---|
| Cotham 21 O-10-43780 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 30.3K | 9.99K | Feb 2013 – Jul 2026 |
Oil, barrels lease total
Last 12 months 651 · prior 12 996(-35%)
Gas, mcf lease total
Last 12 months 167 · prior 12 252(-34%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Element Petro Operating II, LLCFeb 2013 → Sep 2013
- 2Diamondback E&P LLCOct 2013 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 751533-99 | Drill | Element Petro Operating II, LLC | Nov 14, 2012 | Nov 19, 2012 | Dec 29, 2012 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 27, 2013 | Cotham 21 O-10-43780 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 11,289 |
Formation tops
As filed on W-2/G-1. Subsea from 2,963 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,980 | 9,023 | Perforated |
| 9,570 | 9,740 | Perforated |
| 9,836 | 10,044 | Perforated |
| 10,307 | 10,409 | Perforated |
| 10,502 | 10,676 | Perforated |
| 10,738 | 10,887 | Perforated |
| 10,954 | 11,055 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 375 | 17.5 | 300 S |
| 8.625 | 4,609 | 12.25 | 2,300 S |
| 5.5 | 11,279 | 7.875 | 1,125 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 | Jan 22, 2014 | Apr 16, 2013 | 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 42-115-33551 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-115-33551 → 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/11533551, documented in the API reference.