WELL · 42-427-33697 · DISTRICT 4
Margo/Pena #4
Starr County · Arroyo Los Olmos (Middle Yegua) field · Vertical
Margo/Pena #4 (API 42-427-33697) is a well in Starr County operated by Mortimer Production Company, completed January 12, 2004.
The RRC has issued one drilling permit, issued December 30, 2003, permitted to 4,400 ft.
Completion filings report 2 formation tops, including Government Wells, Yegua.
Its 2 leases have reported 3.89K barrels of oil and 245K mcf of gas since January 2004, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- San Antonio, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 12, 2025
- Permits on file
- 53
- Phone
- (210) 821-6168
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Mortimer Production Company |
| Production reports | Mortimer Production Companythrough Dec 2025 |
| Latest permit | Mortimer Production CompanyDec 30, 2003 |
- 4,400
- total depth, ft
- 1
- permits on file
- Dec 30, 2003
- last permit issued
- Jan 12, 2004
- completed
- 3.89K
- cumulative oil, bbl
- 245K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2004 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 12, 2004
- 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Margo/Pena O-4-13780 | Arroyo Los Olmos (Middle Yegua) | Mortimer Production Company | 1 | 3.89K | 12.6K | Dec 2012 – Jul 2026 |
| Margo/Pena G-4-200161 | Arroyo Los Olmos (Middle Yegua) | Mortimer Production Company | 1 | 0 | 233K | Jan 2004 – Dec 2012 |
Oil, barrels lease total
Last 12 months 13 · prior 12 59(-78%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mortimer Production CompanyFeb 2004 → Dec 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 540210-99 | Drill | Mortimer Production Company | Dec 30, 2003 | Dec 30, 2003 | Jan 3, 2004 | 4,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-200161 | — | — | — | — |
| — | — O-4-13780 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 162 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Government Wells | 2,490 | -2,328 |
| Yegua | 3,488 | -3,326 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,248 | 4,253 | Perforated |
| 4,258 | 4,266 | Perforated |
| 4,274 | 4,276 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 555 | 12.25 | — |
| 4.5 | 4,347 | 7.875 | — |
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 | Aug 29, 2013 | Jan 28, 2013 | — |
| 00 | Apr 19, 2004 | Mar 22, 2004 | Yes |
| 00 | Apr 1, 2004 | — | — |
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 42-427-33697 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-427-33697 → 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/42733697, documented in the API reference.