TEXAS · WELLS · SAN PATRICIO COUNTY · API 42-409-30580 · DISTRICT 04
Mayo-Koonce GU #1
San Patricio County · White Point E. (5990) field · Vertical
Mayo-Koonce GU #1 (API 42-409-30580) is a plugged well in San Patricio County, plugged February 18, 2013, last operated by Eog Resources Inc..
The RRC has issued one drilling permit, issued October 20, 1999, permitted to 14,240 ft.
It was permitted by Marathon Oil Company and has since transferred to Eog Resources Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Operator of record
Permitted by Marathon Oil Company; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 2, 2025
- Permits on file
- 16,354
- Phone
- (713) 651-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | EOG Resources Inc. |
| Production reports | EOG Resources, Inc.through May 2009 |
| Latest permit | Marathon Oil CompanyOct 20, 1999 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 14,240
- total depth, ft
- 1
- permits on file
- Oct 20, 1999
- last permit issued
- Sep 23, 1999
- completed
- 0
- cumulative oil, bbl
- 220K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 2013
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 23, 1999
- Shut in
- —
- Plugged
- Feb 18, 2013
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mayo-Koonce GU G-4-174668 | White Point, E. (5990) | EOG Resources, Inc. | 1 | 0 | 220K | Sep 1999 – Feb 2013 |
| Mayo-Koonce Unit G-4-68717 | White Point, East (French) | Marathon Oil Company | 1 | 0 | 0 | Jan 1993 – Sep 1999 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanySep 1999 → Jan 2003
- 2EOG Resources, Inc.Feb 2003 → May 2009
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 488696-99 | Recompletion | Marathon Oil Company | Oct 20, 1999 | Oct 20, 1999 | Aug 30, 1999 | 14,240 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 23, 1999 | Mayo-Koonce GU G-4-174668 | White Point E. (5990) | EOG Resources Inc. | Plugged | — |
| Nov 23, 1988 | Mayo-Koonce Unit G-4-68717 | White Point East (French) | Marathon Oil Company | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 51 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE & YOUNGER | 1 | 50 |
| Anahuac | 4,450 | -4,399 |
| Frio | 5,150 | -5,099 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,995 | 5,997 | Perforated |
| 10,979 | 11,007 | Perforated |
| 11,013 | 11,016 | Perforated |
| 11,044 | 11,050 | Perforated |
| 11,057 | 11,061 | Perforated |
| 11,105 | 11,109 | Perforated |
| 11,114 | 11,120 | Perforated |
| 11,127 | 11,129 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 4,047 | 17.5 | 2,250 S |
| 9.625 | 10,470 | 12.25 | 2,150 S |
| 5 | 14,109 | 8.5 | 985 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 | Nov 15, 1999 | Oct 18, 1999 | Yes |
| 00 | Nov 4, 1999 | — | — |
| 00 | Feb 13, 1989 | Dec 8, 1988 | — |
| 00 | Jan 12, 1984 | Oct 4, 1976 | — |
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 42-409-30580 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-409-30580 → 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/40930580, documented in the API reference.