TEXAS · WELLS · ZAPATA COUNTY · MARTINEZ, MERCURIO ET AL UNIT A LEASE · API 42-505-30971 · DISTRICT 04
Martinez Mercurio et al Unit A #1
Zapata County · Laredo (Lobo) field · Producing · Vertical
Martinez Mercurio ET AL Unit A #1 (API 42-505-30971) is a well in Zapata County operated by Hilcorp Energy Company, completed April 16, 1978 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 3, 1978, permitted to 8,280 ft.
It was permitted by Gulf Oil Corp. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Its lease has reported 8.2K barrels of oil and 2.85M mcf of gas since January 1993, last reporting volume in April 2026.
Operator of record
Permitted by Gulf Oil Corp.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,454
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Gulf Oil Corp.Feb 3, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,280
- total depth, ft
- 1
- permits on file
- Feb 3, 1978
- last permit issued
- Apr 16, 1978
- completed
- 8.2K
- cumulative oil, bbl
- 2.85M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 1995 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 16, 1978
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Martinez, Mercurio et al Unit A G-4-78491 | Laredo (Lobo) | Hilcorp Energy Company | 1 | 8.2K | 2.85M | Jan 1993 – Apr 2026 |
Gas, mcf lease total
Last 12 months 51,196 · prior 12 41,849(+22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chevron U. S. A. Inc.Aug 1995 → Aug 2014
- 2Hilcorp Energy CompanySep 2014 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 17616-99 | Drill | Gulf Oil Corp. | Feb 3, 1978 | Feb 3, 1978 | Feb 24, 1978 | 8,280 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 16, 1978 | Martinez Mercurio et al Unit A G-4-78491 | Laredo (Lobo) | Hilcorp Energy Company | Producing | 8,280 |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 788 | 13.5 | 500 S |
| 7.625 | 6,084 | 9.875 | 500 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 | Jan 12, 1984 | Sep 20, 1978 | — |
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 42-505-30971 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-30971 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/50530971, documented in the API reference.