WELL · 42-115-31528 · DISTRICT 8
Cmi (Spraberry) Unit #1
Dawson County · Cmi (Spraberry) field · Vertical
Cmi (Spraberry) Unit #1 (API 42-115-31528) is a plugged well in Dawson County, plugged December 17, 2013, last operated by Endeavor Energy Resources L.P..
The RRC has issued one drilling permit, issued May 14, 1981, permitted to 7,880 ft.
It was permitted by R K Petroleum Corporation and has since transferred to Endeavor Energy Resources L.P. on the wellbore schedule.
Its 2 leases have reported 114K barrels of oil and 8.74K mcf of gas since January 1993, last reporting in February 2022. The leases carry 7 wells, so these are lease totals, not this well alone.
Operator of record
Endeavor Energy Resources L.P.
Permitted by R K Petroleum Corporation; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jun 12, 2026
- Permits on file
- 6,190
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | R K Petroleum Corp. |
| Production reports | Endeavor Energy Resources L.P.through May 2020 |
| Latest permit | R K Petroleum CorporationMay 14, 1981 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,880
- total depth, ft
- 1
- permits on file
- May 14, 1981
- last permit issued
- May 23, 1981
- completed
- 114K
- cumulative oil, bbl
- 8.74K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 2022
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 23, 1981
- Shut in
- —
- Plugged
- Dec 17, 2013
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 2 leases this well is completed on; they carry 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cmi (Spraberry) Unit O-11-66543 | Cmi (Spraberry) | Endeavor Energy Resources L.P. | 7 | 114K | 8.74K | Jan 1993 – Feb 2022 |
| — O-11-63330 | — | — | 0 | 0 | 0 | — |
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.
- 1R K Petroleum Corp.Jan 1993 → Apr 1997
- 2Stephens, Autry C.May 1997 → Aug 2000
- 3Endeavor Energy Resources L.P.Sep 2000 → May 2020
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 118136-99 | Drill | R K Petroleum Corporation | May 14, 1981 | May 14, 1981 | May 7, 1981 | 7,880 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 23, 1981 | Hancock O-11-63330 | Cmi (Spraberry) | R K Petroleum Corp. | Plugged | — |
| May 23, 1981 | Cmi (Spraberry) Unit O-11-66543 | Cmi (Spraberry) | Endeavor Energy Resources L.P. | Plugged | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,818 | 7,828 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 395 | 17.5 | 395 S |
| 8.625 | 4,395 | 11 | 1,400 S |
| 2.375 | 7,794 | — | — |
| 4.5 | 7,880 | 7.875 | 750 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 20, 1990 | Jun 11, 1981 | — |
| 00 | Aug 16, 1990 | — | — |
| 00 | Jan 12, 1984 | Jun 11, 1981 | — |
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 42-115-31528 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-115-31528 → 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/11531528, documented in the API reference.