TEXAS · WELLS · YOAKUM COUNTY · DENVER UNIT LEASE · API 42-501-35986 · DISTRICT 7B
Denver Unit #4357
Yoakum County · Wasson field · Producing · Directional
Denver Unit #4357 (API 42-501-35986) is a well in Yoakum County operated by Occidental Permian Ltd., completed October 10, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 9, 2012, permitted to 5,403 ft.
Completion filings report 3 formation tops, including Rustler, Grayburg, San Andres.
Its lease has reported 352M barrels of oil and 1.17B mcf of gas since the record begins in January 1993, last reporting volume in April 2026. The lease carries 2,471 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 2, 2026
- Permits on file
- 6,251
- Phone
- (713) 215-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Occidental Permian Ltd. |
| Production reports | Occidental Permian Ltd.through Apr 2026 |
| Latest permit | Occidental Permian Ltd.Jul 9, 2012 |
- 5,403
- total depth, ft
- 1
- permits on file
- Jul 9, 2012
- last permit issued
- Oct 10, 2012
- completed
- 352M
- cumulative oil, bbl
- 1.17B
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 10, 2012
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 2,471 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Denver Unit O-11-18910 | Wasson | Occidental Permian Ltd. | 2,471 | 352M | 1.17B | by Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 6,889,269 · prior 12 7,061,574(-2%)
Gas, mcf lease total
Last 12 months 9,464,854 · prior 12 11,150,167(-15%)
Wells named Denver Unit
Occidental Permian Ltd.'s other wells filed under this lease name in Yoakum County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Shell Western E&P Inc.Jan 1993 → Feb 1997
- 2Altura Energy Ltd.Mar 1997 → Apr 2000
- 3Occidental Permian Ltd.May 2000 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 743738-99 | Drill | Occidental Permian Ltd. | Jun 28, 2012 | Jul 9, 2012 | Sep 20, 2012 | 5,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 10, 2012 | Denver Unit O-11-18910 | Wasson | Occidental Permian Ltd. | Producing | 5,403 |
Formation tops
As filed on W-2/G-1. Subsea from 3,626 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 2,150 | 1,476 |
| Grayburg | 4,022 | -396 |
| San Andres | 4,301 | -675 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,053 | 5,108 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,110 | 12.25 | 1,130 S |
| 5.5 | 5,390 | 7.875 | 1,500 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 | Apr 25, 2014 | Jul 28, 2013 | Yes |
Well logs
2 logs loaded from the RRC's log index, the latest received Oct 30, 2015. Neutron. 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 |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Rustler, Grayburg, San Andres | TIFF | 4,000 to 5,340 | Oct 30, 2015run Oct 5, 2012 | 0.75 |
| NEUTRON POROSITYSpans Rustler, Grayburg, San Andres | TIFF | 4,000 to 5,361 | Sep 15, 2015run Oct 1, 2012 | 1.12 |
"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 42-501-35986 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-501-35986 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/50135986, documented in the API reference.