WELL · 42-135-40887 · DISTRICT 8
East Cowden (Grayburg) Unit #98
Ector County · Cowden North field · Producing · Directional
East Cowden (Grayburg) Unit #98 (API 42-135-40887) is a well in Ector County operated by Basin Oil & Gas Operating LLC, completed November 11, 2011 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 5, 2011, permitted to 4,750 ft.
It was permitted by Quantum Resources Management,LLC and has since transferred to Basin Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Rustler, Yates, Grayburg.
Its lease has reported 10.4M barrels of oil and 3.6M mcf of gas since January 1993, last reporting in July 2026. The lease carries 92 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Quantum Resources Management,llc; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 21, 2026
- Permits on file
- 150
- Phone
- (817) 820-8910
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Basin Oil & Gas Operating LLC |
| Production reports | Basin Oil & Gas Operating, LLCthrough Apr 2026 |
| Latest permit | Quantum Resources Management,llcMay 5, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,750
- total depth, ft
- 1
- permits on file
- May 5, 2011
- last permit issued
- Nov 11, 2011
- completed
- 10.4M
- cumulative oil, bbl
- 3.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 11, 2011
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 92 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| East Cowden (Grayburg) Unit O-10-22927 | Cowden, North | Basin Oil & Gas Operating, LLC | 92 | 10.4M | 3.6M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 42,180 · prior 12 44,814(-6%)
Gas, mcf lease total
Last 12 months 14,805 · prior 12 19,309(-23%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Conoco Inc.Jan 1993 → Dec 2001
- 2Encore Operating, L.P.Jan 2002 → Aug 2010
- 3Quantum Resources Management,llcSep 2010 → Dec 2014
- 4Breitburn Operating L.P.Jan 2015 → Jan 2020
- 5Vaquero Hunter Inc.Feb 2020 → Sep 2023
- 6Vaquero Permian, LLCOct 2023 → Mar 2024
- 7Basin Oil & Gas Operating, LLCApr 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 712955-99 | Drill | Quantum Resources Management,llc | Mar 28, 2011 | May 5, 2011 | Oct 16, 2011 | 4,750 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-22927 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,038 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,305 | 4,400 | Perforated |
| 4,432 | 4,454 | Perforated |
| 4,548 | 4,676 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,598 | 12.25 | 800 S |
| 5.5 | 4,775 | 7.875 | 650 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 | Feb 27, 2013 | Feb 27, 2012 | 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 42-135-40887 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-40887 → 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/13540887, documented in the API reference.