TEXAS · WELLS · GLASSCOCK COUNTY · COLE RANCH -35- LEASE · API 42-173-33820 · DISTRICT 7B
Cole Ranch -35- #4502
Glasscock County · Spraberry (Trend Area) field · Producing · Vertical
Cole Ranch -35- #4502 (API 42-173-33820) is a well in Glasscock County operated by Diamondback E&P LLC, completed March 23, 2011 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued October 27, 2010, permitted to 10,920 ft.
It was permitted by Energen Resources Corporation and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Strawn, Devonian.
Its lease has reported 2.13M barrels of oil and 10.5M mcf of gas since July 2010, last reporting volume in April 2026. The lease carries 40 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Energen Resources Corporation; 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
- 5,251
- 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 | Energen Resources CorporationOct 27, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,920
- total depth, ft
- 1
- permits on file
- Oct 27, 2010
- last permit issued
- Mar 23, 2011
- completed
- 2.13M
- cumulative oil, bbl
- 10.5M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 23, 2011
- 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; they carry 40 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cole Ranch -35- O-10-40428 | Spraberry (Trend Area) | Diamondback E&P LLC | 40 | 2.13M | 10.5M | Jul 2010 – Apr 2026 |
Gas, mcf lease total
Last 12 months 440,688 · prior 12 463,383(-5%)
Oil, barrels lease total
Last 12 months 57,794 · prior 12 67,672(-15%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Energen Resources CorporationJul 2010 → Jan 2019
- 2Diamondback E&P LLCFeb 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 704113-99 | Drill | Energen Resources Corporation | Oct 20, 2010 | Oct 27, 2010 | Nov 12, 2010 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 23, 2011 | Cole Ranch -35- O-10-40428 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,920 |
Formation tops
As filed on W-2/G-1. Subsea from 2,701 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,652 | 10,707 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 451 | 17.5 | 500 S |
| 8.625 | 5,202 | 11 | 1,500 S |
| 5.5 | 10,920 | 7.875 | 2,000 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 2, 2012 | May 20, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Aug 13, 2012. Resistivity. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans Spraberry, Strawn, Devonian | 2 TIFF | 1,200 to 10,790 | Aug 13, 2012run Dec 3, 2010 | 2.74 + 3.15 |
"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 42-173-33820 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-173-33820 → 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/17333820, documented in the API reference.