WELL · 42-427-32015 · DISTRICT 4
Marrs McLean #26
Starr County · Lockhart (Cockfield 4 UP) field · Vertical
Marrs Mclean #26 (API 42-427-32015) is a well in Starr County operated by Sun Expl. & Prod. CO.-Corpus, completed June 2, 1985.
The RRC has issued 3 drilling permits between 1985 and 2004, permitted to 5,000 ft.
It was permitted by White Oak Operating Company LLC and has since transferred to Sun Expl. & Prod. CO.-Corpus on the wellbore schedule.
Completion filings report 2 formation tops, including (Cockfield 4, Up), Cockfield 4, Up..
Its 2 leases have reported 111K barrels of oil and 840K mcf of gas since January 1993, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by White Oak Operating Company LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 New · 1,290 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sun Expl. & Prod. Co.-Corpus |
| Production reports | White Stride LLCthrough Mar 2026 |
| Latest permit | White Oak Operating Company LLCJan 23, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,000
- total depth, ft
- 3
- permits on file
- Jan 23, 2004
- last permit issued
- Jun 2, 1985
- completed
- 111K
- cumulative oil, bbl
- 840K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 2, 1985
- Shut in
- —
- Plugged
- —
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| McLean, Marrs G-4-199154 | Lockhart (Pettus, Gas) | White Stride LLC | 1 | 0 | 285K | Jun 2003 – Jul 2026 |
| McLean, Marrs O-4-9832 | Lockhart (Cockfield #2) | White Stride LLC | 3 | 111K | 554K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 2,521 · prior 12 2,895(-13%)
Gas, mcf lease total
Last 12 months 8,642 · prior 12 10,452(-17%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1South Texas Limited PartnershipJan 1993 → Feb 1994
- 2Washington Energy Expl., Inc.Mar 1994 → Jul 1994
- 3Cabot Oil & Gas Production Corp.Aug 1994 → Feb 1996
- 4Cabot Oil & Gas CorporationMar 1996 → Jan 1997
- 5Ceniza Petroleum, Inc.Feb 1997 → Jun 2002
- 6FredcoJul 2002 → Feb 2003
- 7White Oak Operating Company LLCMar 2003 → Jun 2004
- 8Opex Energy, LLCJul 2004 → Mar 2007
- 9Exploration Company, TheApr 2007 → Jun 2007
- 10Txco Resources Inc.Jul 2007 → Jul 2008
- 11Continental Operating Co.Aug 2008 → Nov 2019
- 12Maverick Brothers Operating,inc.Dec 2019 → Jun 2025
- 13White Stride LLCJul 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 537423-99 | Recompletion | White Oak Operating Company LLC | Oct 10, 2003 | Jan 23, 2004 | Jun 20, 2003 | 3,600 |
| 329085-99 | Recompletion | Sun Expl. & Prod. Co.-Corpus | Apr 16, 1987 | May 15, 1987 | — | 4,800 |
| 273335-99 | Drill | Sun Expl. & Prod. Co.-Corpus | Mar 21, 1985 | Apr 25, 1985 | May 22, 1985 | 5,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-199154 | — | — | — | — |
| — | — O-4-9832 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 372 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| (Cockfield 4, UP) | 3,917 | -3,545 |
| Cockfield 4, Up. | 3,917 | -3,545 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,556 | 3,562 | Perforated |
| 3,727 | 3,735 | Perforated |
| 3,737 | 3,743 | Perforated |
| 3,917 | 3,922 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 485 | 12.25 | 305 S |
| 4.5 | 4,800 | 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 | Mar 19, 2004 | Sep 25, 2003 | Yes |
| 00 | Feb 19, 2004 | — | — |
| 00 | Oct 14, 1987 | Sep 17, 1987 | — |
| 00 | Sep 29, 1987 | — | — |
| 00 | Sep 3, 1987 | Jul 10, 1987 | — |
| 00 | Aug 4, 1987 | — | — |
| 00 | Jan 15, 1986 | Jan 3, 1986 | Yes |
| 00 | Jan 9, 1986 | — | — |
| 00 | Dec 19, 1985 | Jul 30, 1985 | — |
| 00 | Dec 11, 1985 | — | — |
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 42-427-32015 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-32015 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/42732015, documented in the API reference.