TEXAS · WELLS · ECTOR COUNTY · PENWELL UNIT LEASE · API 42-135-39218 · DISTRICT 7B
Penwell Unit #1359
Ector County · Penwell field · Shut In · Vertical
Penwell Unit #1359 (API 42-135-39218) is a well in Ector County operated by Ctoc Energy LLC, completed January 10, 2007 and listed as shut in on the RRC schedule, shut in January 1, 2022.
The RRC has issued one drilling permit, issued November 13, 2006, permitted to 4,101 ft.
It was permitted by Xto Energy Inc. and has since transferred to Ctoc Energy LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Rustler, Yates, Queen, Grayburg.
Its lease has reported 6.85M barrels of oil and 2.21M mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 289 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by XTO Energy Inc.; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Apr 24, 2026
- Phone
- (817) 334-7804
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ctoc Energy LLC |
| Production reports | Cross Timbers Energy, LLCthrough Apr 2026 |
| Latest permit | XTO Energy Inc.Nov 13, 2006 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,101
- total depth, ft
- 1
- permits on file
- Nov 13, 2006
- last permit issued
- Jan 10, 2007
- completed
- 6.85M
- cumulative oil, bbl
- 2.21M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 10, 2007
- Shut in
- Jan 1, 2022
- 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; they carry 289 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Penwell Unit O-10-23007 | Penwell | Cross Timbers Energy, LLC | 289 | 6.85M | 2.21M | Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 47,538 · prior 12 44,614(+7%)
Gas, mcf lease total
Last 12 months 7,916 · prior 12 2,830(+180%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Texaco E & P Inc.Jan 1993 → May 2002
- 2Chevron U. S. A. Inc.Jun 2002 → Jul 2004
- 3XTO Energy Inc.Aug 2004 → Apr 2012
- 4Merit Energy CompanyMay 2012 → Dec 2013
- 5Cross Timbers Energy, LLCJan 2014 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 627450-99 | Drill | XTO Energy Inc. | Oct 12, 2006 | Nov 13, 2006 | Nov 29, 2006 | 4,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 10, 2007 | Penwell Unit O-10-23007 | Penwell | Ctoc Energy LLC | Shut In · shut in Jan 1, 2022 | 4,101 |
Formation tops
As filed on W-2/G-1. Subsea from 2,916 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 964 | 1,952 |
| Yates | 2,126 | 790 |
| Queen | 3,032 | -116 |
| Grayburg | 3,223 | -307 |
| San Andres | 3,440 | -524 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,510 | 3,924 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 964 | 11 | 365 S |
| 5.5 | 4,101 | 7.875 | 775 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 | May 21, 2007 | Feb 1, 2007 | Yes |
| 00 | Apr 18, 2007 | — | — |
Well logs
2 logs loaded from the RRC's log index, the latest received May 21, 2008. Density, Gamma ray, Neutron, Sonic. 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 |
|---|---|---|---|---|
| Acoustic PorosityCOMPENSATED SONIC LOGSpans Rustler, Yates, Queen, Grayburg, San Andres | TIFF | 963 to 4,100 | May 21, 2008run Dec 4, 2006 | — |
| Neutron/Density PorositySPECTRAL DENSITY DUAL SPACED NEUTRON SPECTRAL GAMMA LOGSpans Rustler, Yates, Queen, Grayburg, San Andres | TIFF | 200 to 4,100 | May 21, 2008run Dec 4, 2006 | — |
"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 42-135-39218 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-39218 → 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/13539218, documented in the API reference.